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<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span>&#160;<span class="comment">/* $NoKeywords: $ */</span></div><div class="line"><a name="l00002"></a><span class="lineno"> 2</span>&#160;<span class="comment">/*</span></div><div class="line"><a name="l00003"></a><span class="lineno"> 3</span>&#160;<span class="comment">//</span></div><div class="line"><a name="l00004"></a><span class="lineno"> 4</span>&#160;<span class="comment">// Copyright (c) 1993-2012 Robert McNeel &amp; Associates. All rights reserved.</span></div><div class="line"><a name="l00005"></a><span class="lineno"> 5</span>&#160;<span class="comment">// OpenNURBS, Rhinoceros, and Rhino3D are registered trademarks of Robert</span></div><div class="line"><a name="l00006"></a><span class="lineno"> 6</span>&#160;<span class="comment">// McNeel &amp; Associates.</span></div><div class="line"><a name="l00007"></a><span class="lineno"> 7</span>&#160;<span class="comment">//</span></div><div class="line"><a name="l00008"></a><span class="lineno"> 8</span>&#160;<span class="comment">// THIS SOFTWARE IS PROVIDED &quot;AS IS&quot; WITHOUT EXPRESS OR IMPLIED WARRANTY.</span></div><div class="line"><a name="l00009"></a><span class="lineno"> 9</span>&#160;<span class="comment">// ALL IMPLIED WARRANTIES OF FITNESS FOR ANY PARTICULAR PURPOSE AND OF</span></div><div class="line"><a name="l00010"></a><span class="lineno"> 10</span>&#160;<span class="comment">// MERCHANTABILITY ARE HEREBY DISCLAIMED.</span></div><div class="line"><a name="l00011"></a><span class="lineno"> 11</span>&#160;<span class="comment">// </span></div><div class="line"><a name="l00012"></a><span class="lineno"> 12</span>&#160;<span class="comment">// For complete openNURBS copyright information see &lt;http://www.opennurbs.org&gt;.</span></div><div class="line"><a name="l00013"></a><span class="lineno"> 13</span>&#160;<span class="comment">//</span><span class="comment"></span></div><div class="line"><a name="l00014"></a><span class="lineno"> 14</span>&#160;<span class="comment">////////////////////////////////////////////////////////////////</span></div><div class="line"><a name="l00015"></a><span class="lineno"> 15</span>&#160;<span class="comment"></span>*/</div><div class="line"><a name="l00016"></a><span class="lineno"> 16</span>&#160;</div><div class="line"><a name="l00017"></a><span class="lineno"> 17</span>&#160;<span class="preprocessor">#if !defined(OPENNURBS_LIGHT_INC_)</span></div><div class="line"><a name="l00018"></a><span class="lineno"> 18</span>&#160;<span class="preprocessor">#define OPENNURBS_LIGHT_INC_</span></div><div class="line"><a name="l00019"></a><span class="lineno"> 19</span>&#160;</div><div class="line"><a name="l00020"></a><span class="lineno"><a class="line" href="../../d0/df3/class_o_n___light.html"> 20</a></span>&#160;<span class="keyword">class </span>ON_CLASS <a class="code" href="../../d0/df3/class_o_n___light.html">ON_Light</a> : <span class="keyword">public</span> <a class="code" href="../../df/de0/class_o_n___geometry.html">ON_Geometry</a></div><div class="line"><a name="l00021"></a><span class="lineno"> 21</span>&#160;{</div><div class="line"><a name="l00022"></a><span class="lineno"> 22</span>&#160; ON_OBJECT_DECLARE(<a class="code" href="../../d0/df3/class_o_n___light.html">ON_Light</a>);</div><div class="line"><a name="l00023"></a><span class="lineno"> 23</span>&#160;</div><div class="line"><a name="l00024"></a><span class="lineno"> 24</span>&#160;<span class="keyword">public</span>:</div><div class="line"><a name="l00025"></a><span class="lineno"> 25</span>&#160; <a class="code" href="../../d0/df3/class_o_n___light.html">ON_Light</a>();</div><div class="line"><a name="l00026"></a><span class="lineno"> 26</span>&#160; ~<a class="code" href="../../d0/df3/class_o_n___light.html">ON_Light</a>();</div><div class="line"><a name="l00027"></a><span class="lineno"> 27</span>&#160; <a class="code" href="../../d0/df3/class_o_n___light.html">ON_Light</a>&amp; <a class="code" href="../../df/de0/class_o_n___geometry.html#a071e7617820ea38c40f4b3966e7daee0">operator=</a>(<span class="keyword">const</span> <a class="code" href="../../d0/df3/class_o_n___light.html">ON_Light</a>&amp;) = <span class="keywordflow">default</span>;</div><div class="line"><a name="l00028"></a><span class="lineno"> 28</span>&#160; <a class="code" href="../../d0/df3/class_o_n___light.html">ON_Light</a>(<span class="keyword">const</span> <a class="code" href="../../d0/df3/class_o_n___light.html">ON_Light</a>&amp;) = <span class="keywordflow">default</span>;</div><div class="line"><a name="l00029"></a><span class="lineno"> 29</span>&#160;</div><div class="line"><a name="l00030"></a><span class="lineno"><a class="line" href="../../d0/df3/class_o_n___light.html#a93c6e3443f9b6034296b2d6eb0e13d82"> 30</a></span>&#160; <span class="keyword">static</span> <span class="keyword">const</span> <a class="code" href="../../d0/df3/class_o_n___light.html">ON_Light</a> <a class="code" href="../../d0/df3/class_o_n___light.html#a93c6e3443f9b6034296b2d6eb0e13d82">Unset</a>;</div><div class="line"><a name="l00031"></a><span class="lineno"> 31</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00032"></a><span class="lineno"> 32</span>&#160;<span class="comment"> /////////////////////////////////////////////////////////////////</span></div><div class="line"><a name="l00033"></a><span class="lineno"> 33</span>&#160;<span class="comment"></span> <span class="comment">//</span></div><div class="line"><a name="l00034"></a><span class="lineno"> 34</span>&#160; <span class="comment">// ON_Object virtual functions </span></div><div class="line"><a name="l00035"></a><span class="lineno"> 35</span>&#160; <span class="comment">//</span></div><div class="line"><a name="l00036"></a><span class="lineno"> 36</span>&#160;</div><div class="line"><a name="l00037"></a><span class="lineno"> 37</span>&#160; <span class="keywordtype">bool</span> <a class="code" href="../../df/de0/class_o_n___geometry.html#adf87e5ba0d9939dfabbb9f421b9d2b3b">IsValid</a>( <span class="keyword">class</span> <a class="code" href="../../d2/da3/class_o_n___text_log.html">ON_TextLog</a>* text_log = <span class="keyword">nullptr</span> ) <span class="keyword">const override</span>;</div><div class="line"><a name="l00038"></a><span class="lineno"> 38</span>&#160;</div><div class="line"><a name="l00039"></a><span class="lineno"> 39</span>&#160; <span class="keywordtype">void</span> <a class="code" href="../../d9/d7b/class_o_n___object.html#a21c7b04a80f1806c3a45f72d7c491a44">Dump</a>( <a class="code" href="../../d2/da3/class_o_n___text_log.html">ON_TextLog</a>&amp; ) <span class="keyword">const override</span>; <span class="comment">// for debugging</span></div><div class="line"><a name="l00040"></a><span class="lineno"> 40</span>&#160;</div><div class="line"><a name="l00041"></a><span class="lineno"> 41</span>&#160; <span class="comment">// Use ON_BinaryArchive::WriteObject() and ON_BinaryArchive::ReadObject()</span></div><div class="line"><a name="l00042"></a><span class="lineno"> 42</span>&#160; <span class="comment">// for top level serialization. These Read()/Write() members should just</span></div><div class="line"><a name="l00043"></a><span class="lineno"> 43</span>&#160; <span class="comment">// write/read specific definitions. In particular, they should not write/</span></div><div class="line"><a name="l00044"></a><span class="lineno"> 44</span>&#160; <span class="comment">// read any chunk typecode or length information. The default </span></div><div class="line"><a name="l00045"></a><span class="lineno"> 45</span>&#160; <span class="comment">// implementations return false and do nothing.</span></div><div class="line"><a name="l00046"></a><span class="lineno"> 46</span>&#160; <span class="keywordtype">bool</span> <a class="code" href="../../d9/d7b/class_o_n___object.html#a16eb9ab6bf0d0a614655cf9cd055871a">Write</a>(</div><div class="line"><a name="l00047"></a><span class="lineno"> 47</span>&#160; <a class="code" href="../../db/d16/class_o_n___binary_archive.html">ON_BinaryArchive</a>&amp; <span class="comment">// serialize definition to binary archive</span></div><div class="line"><a name="l00048"></a><span class="lineno"> 48</span>&#160; ) <span class="keyword">const override</span>;</div><div class="line"><a name="l00049"></a><span class="lineno"> 49</span>&#160;</div><div class="line"><a name="l00050"></a><span class="lineno"> 50</span>&#160; <span class="keywordtype">bool</span> <a class="code" href="../../d9/d7b/class_o_n___object.html#a09ac9742ead91dd8f9cdd579bcbfed10">Read</a>(</div><div class="line"><a name="l00051"></a><span class="lineno"> 51</span>&#160; <a class="code" href="../../db/d16/class_o_n___binary_archive.html">ON_BinaryArchive</a>&amp; <span class="comment">// restore definition from binary archive</span></div><div class="line"><a name="l00052"></a><span class="lineno"> 52</span>&#160; ) <span class="keyword">override</span>;</div><div class="line"><a name="l00053"></a><span class="lineno"> 53</span>&#160;</div><div class="line"><a name="l00054"></a><span class="lineno"> 54</span>&#160; ON::object_type <a class="code" href="../../d9/d7b/class_o_n___object.html#afa19aee4a411a8fda53aff00bd02d86e">ObjectType</a>() <span class="keyword">const override</span>;</div><div class="line"><a name="l00055"></a><span class="lineno"> 55</span>&#160;</div><div class="line"><a name="l00056"></a><span class="lineno"> 56</span>&#160; <span class="comment">// virtual</span></div><div class="line"><a name="l00057"></a><span class="lineno"> 57</span>&#160; <a class="code" href="../../d8/db4/struct_o_n___u_u_i_d__struct.html">ON_UUID</a> <a class="code" href="../../d9/d7b/class_o_n___object.html#a21c508d3b53458e252adbcd29e62ed09">ModelObjectId</a>() <span class="keyword">const override</span>;</div><div class="line"><a name="l00058"></a><span class="lineno"> 58</span>&#160;</div><div class="line"><a name="l00059"></a><span class="lineno"> 59</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00060"></a><span class="lineno"> 60</span>&#160;<span class="comment"> /////////////////////////////////////////////////////////////////</span></div><div class="line"><a name="l00061"></a><span class="lineno"> 61</span>&#160;<span class="comment"></span> <span class="comment">//</span></div><div class="line"><a name="l00062"></a><span class="lineno"> 62</span>&#160; <span class="comment">// ON_Geometry virtual functions </span></div><div class="line"><a name="l00063"></a><span class="lineno"> 63</span>&#160; <span class="comment">//</span></div><div class="line"><a name="l00064"></a><span class="lineno"> 64</span>&#160; <span class="keywordtype">int</span> <a class="code" href="../../df/de0/class_o_n___geometry.html#a0d66ab16e2fddfd1b3e6cf3d6ebbd364">Dimension</a>() <span class="keyword">const override</span>;</div><div class="line"><a name="l00065"></a><span class="lineno"> 65</span>&#160;</div><div class="line"><a name="l00066"></a><span class="lineno"> 66</span>&#160; <span class="comment">// virtual ON_Geometry GetBBox override </span></div><div class="line"><a name="l00067"></a><span class="lineno"> 67</span>&#160; <span class="keywordtype">bool</span> <a class="code" href="../../df/de0/class_o_n___geometry.html#ad615e08fe92af659c8d10cbb4f8fc5e3">GetBBox</a>( <span class="keywordtype">double</span>* boxmin, <span class="keywordtype">double</span>* boxmax, <span class="keywordtype">bool</span> bGrowBox = <span class="keyword">false</span> ) <span class="keyword">const override</span>;</div><div class="line"><a name="l00068"></a><span class="lineno"> 68</span>&#160;</div><div class="line"><a name="l00069"></a><span class="lineno"> 69</span>&#160; <span class="keywordtype">bool</span> <a class="code" href="../../df/de0/class_o_n___geometry.html#add710872e89bc29e1ed1321b3e70b1b1">Transform</a>( </div><div class="line"><a name="l00070"></a><span class="lineno"> 70</span>&#160; <span class="keyword">const</span> <a class="code" href="../../d3/d13/class_o_n___xform.html">ON_Xform</a>&amp;</div><div class="line"><a name="l00071"></a><span class="lineno"> 71</span>&#160; ) <span class="keyword">override</span>;</div><div class="line"><a name="l00072"></a><span class="lineno"> 72</span>&#160; <span class="comment"></span></div><div class="line"><a name="l00073"></a><span class="lineno"> 73</span>&#160;<span class="comment"> /////////////////////////////////////////////////////////</span></div><div class="line"><a name="l00074"></a><span class="lineno"> 74</span>&#160;<span class="comment"></span> <span class="comment">//</span></div><div class="line"><a name="l00075"></a><span class="lineno"> 75</span>&#160; <span class="comment">// Interface</span></div><div class="line"><a name="l00076"></a><span class="lineno"> 76</span>&#160; <span class="comment">//</span></div><div class="line"><a name="l00077"></a><span class="lineno"> 77</span>&#160;</div><div class="line"><a name="l00078"></a><span class="lineno"> 78</span>&#160; <span class="keywordtype">void</span> Default(); <span class="comment">// make default light</span></div><div class="line"><a name="l00079"></a><span class="lineno"> 79</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00080"></a><span class="lineno"> 80</span>&#160;<span class="comment"> /////////////////////////////////////////////////////////</span></div><div class="line"><a name="l00081"></a><span class="lineno"> 81</span>&#160;<span class="comment"></span> <span class="comment">//</span></div><div class="line"><a name="l00082"></a><span class="lineno"> 82</span>&#160; <span class="comment">// turn light on/off</span></div><div class="line"><a name="l00083"></a><span class="lineno"> 83</span>&#160; <span class="comment">//</span></div><div class="line"><a name="l00084"></a><span class="lineno"> 84</span>&#160; <span class="keywordtype">bool</span> Enable( <span class="keywordtype">bool</span> = <span class="keyword">true</span> ); <span class="comment">// returns previous state</span></div><div class="line"><a name="l00085"></a><span class="lineno"> 85</span>&#160; <span class="keywordtype">bool</span> IsEnabled() <span class="keyword">const</span>;</div><div class="line"><a name="l00086"></a><span class="lineno"> 86</span>&#160; <span class="comment"></span></div><div class="line"><a name="l00087"></a><span class="lineno"> 87</span>&#160;<span class="comment"> /////////////////////////////////////////////////////////</span></div><div class="line"><a name="l00088"></a><span class="lineno"> 88</span>&#160;<span class="comment"></span> <span class="comment">//</span></div><div class="line"><a name="l00089"></a><span class="lineno"> 89</span>&#160; <span class="comment">// style, location, and direction</span></div><div class="line"><a name="l00090"></a><span class="lineno"> 90</span>&#160; <span class="comment">// direction is ignored for &quot;point&quot; and &quot;ambient&quot; lights</span></div><div class="line"><a name="l00091"></a><span class="lineno"> 91</span>&#160; <span class="comment">// location is ignored for &quot;directional&quot; and &quot;ambient&quot; lights</span></div><div class="line"><a name="l00092"></a><span class="lineno"> 92</span>&#160; <span class="keywordtype">void</span> SetStyle(ON::light_style);</div><div class="line"><a name="l00093"></a><span class="lineno"> 93</span>&#160; ON::light_style Style() <span class="keyword">const</span>;</div><div class="line"><a name="l00094"></a><span class="lineno"> 94</span>&#160;</div><div class="line"><a name="l00095"></a><span class="lineno"> 95</span>&#160; <span class="keyword">const</span> <span class="keywordtype">bool</span> IsPointLight() <span class="keyword">const</span>;</div><div class="line"><a name="l00096"></a><span class="lineno"> 96</span>&#160; <span class="keyword">const</span> <span class="keywordtype">bool</span> IsDirectionalLight() <span class="keyword">const</span>;</div><div class="line"><a name="l00097"></a><span class="lineno"> 97</span>&#160; <span class="keyword">const</span> <span class="keywordtype">bool</span> IsSpotLight() <span class="keyword">const</span>;</div><div class="line"><a name="l00098"></a><span class="lineno"> 98</span>&#160; <span class="keyword">const</span> <span class="keywordtype">bool</span> IsLinearLight() <span class="keyword">const</span>;</div><div class="line"><a name="l00099"></a><span class="lineno"> 99</span>&#160; <span class="keyword">const</span> <span class="keywordtype">bool</span> IsRectangularLight() <span class="keyword">const</span>;</div><div class="line"><a name="l00100"></a><span class="lineno"> 100</span>&#160;</div><div class="line"><a name="l00101"></a><span class="lineno"> 101</span>&#160; ON::coordinate_system CoordinateSystem() <span class="keyword">const</span>; <span class="comment">// determined by style</span></div><div class="line"><a name="l00102"></a><span class="lineno"> 102</span>&#160;</div><div class="line"><a name="l00103"></a><span class="lineno"> 103</span>&#160; <span class="comment">/*</span></div><div class="line"><a name="l00104"></a><span class="lineno"> 104</span>&#160;<span class="comment"> Description:</span></div><div class="line"><a name="l00105"></a><span class="lineno"> 105</span>&#160;<span class="comment"> A light&#39;s location and direction can be defined with respect</span></div><div class="line"><a name="l00106"></a><span class="lineno"> 106</span>&#160;<span class="comment"> to world, camera, or view coordinates. GetLightXform gets</span></div><div class="line"><a name="l00107"></a><span class="lineno"> 107</span>&#160;<span class="comment"> the transformation from the light&#39;s intrinsic coordinate</span></div><div class="line"><a name="l00108"></a><span class="lineno"> 108</span>&#160;<span class="comment"> system to the destination coordinate system specified</span></div><div class="line"><a name="l00109"></a><span class="lineno"> 109</span>&#160;<span class="comment"> by dest_cs.</span></div><div class="line"><a name="l00110"></a><span class="lineno"> 110</span>&#160;<span class="comment"> Parameters:</span></div><div class="line"><a name="l00111"></a><span class="lineno"> 111</span>&#160;<span class="comment"> vp - [in] viewport where light is being used</span></div><div class="line"><a name="l00112"></a><span class="lineno"> 112</span>&#160;<span class="comment"> dest_cs - [in] destination coordinate system</span></div><div class="line"><a name="l00113"></a><span class="lineno"> 113</span>&#160;<span class="comment"> xform - [out] transformation from the light&#39;s intrinsic</span></div><div class="line"><a name="l00114"></a><span class="lineno"> 114</span>&#160;<span class="comment"> coordinate system to cs.</span></div><div class="line"><a name="l00115"></a><span class="lineno"> 115</span>&#160;<span class="comment"> Returns:</span></div><div class="line"><a name="l00116"></a><span class="lineno"> 116</span>&#160;<span class="comment"> true if successful.</span></div><div class="line"><a name="l00117"></a><span class="lineno"> 117</span>&#160;<span class="comment"> */</span></div><div class="line"><a name="l00118"></a><span class="lineno"> 118</span>&#160; <span class="keywordtype">bool</span> GetLightXform( </div><div class="line"><a name="l00119"></a><span class="lineno"> 119</span>&#160; <span class="keyword">const</span> <a class="code" href="../../d4/deb/class_o_n___viewport.html">ON_Viewport</a>&amp; vp,</div><div class="line"><a name="l00120"></a><span class="lineno"> 120</span>&#160; ON::coordinate_system dest_cs, </div><div class="line"><a name="l00121"></a><span class="lineno"> 121</span>&#160; <a class="code" href="../../d3/d13/class_o_n___xform.html">ON_Xform</a>&amp; xform </div><div class="line"><a name="l00122"></a><span class="lineno"> 122</span>&#160; ) <span class="keyword">const</span>;</div><div class="line"><a name="l00123"></a><span class="lineno"> 123</span>&#160;</div><div class="line"><a name="l00124"></a><span class="lineno"> 124</span>&#160; <span class="keywordtype">void</span> SetLocation( <span class="keyword">const</span> <a class="code" href="../../d2/d35/class_o_n__3d_point.html">ON_3dPoint</a>&amp; );</div><div class="line"><a name="l00125"></a><span class="lineno"> 125</span>&#160; <span class="keywordtype">void</span> SetDirection( <span class="keyword">const</span> <a class="code" href="../../d5/dae/class_o_n__3d_vector.html">ON_3dVector</a>&amp; );</div><div class="line"><a name="l00126"></a><span class="lineno"> 126</span>&#160;</div><div class="line"><a name="l00127"></a><span class="lineno"> 127</span>&#160; <a class="code" href="../../d2/d35/class_o_n__3d_point.html">ON_3dPoint</a> Location() <span class="keyword">const</span>;</div><div class="line"><a name="l00128"></a><span class="lineno"> 128</span>&#160; <a class="code" href="../../d5/dae/class_o_n__3d_vector.html">ON_3dVector</a> Direction() <span class="keyword">const</span>;</div><div class="line"><a name="l00129"></a><span class="lineno"> 129</span>&#160; <a class="code" href="../../d5/dae/class_o_n__3d_vector.html">ON_3dVector</a> PerpindicularDirection() <span class="keyword">const</span>;</div><div class="line"><a name="l00130"></a><span class="lineno"> 130</span>&#160;</div><div class="line"><a name="l00131"></a><span class="lineno"> 131</span>&#160; <span class="keywordtype">double</span> Intensity() <span class="keyword">const</span>; <span class="comment">// 0.0 = 0% 1.0 = 100% Only clamped above zero - no maximum.</span></div><div class="line"><a name="l00132"></a><span class="lineno"> 132</span>&#160; <span class="keywordtype">void</span> SetIntensity(<span class="keywordtype">double</span>);</div><div class="line"><a name="l00133"></a><span class="lineno"> 133</span>&#160;</div><div class="line"><a name="l00134"></a><span class="lineno"> 134</span>&#160; <span class="keywordtype">double</span> PowerWatts() <span class="keyword">const</span>;</div><div class="line"><a name="l00135"></a><span class="lineno"> 135</span>&#160; <span class="keywordtype">double</span> PowerLumens() <span class="keyword">const</span>;</div><div class="line"><a name="l00136"></a><span class="lineno"> 136</span>&#160; <span class="keywordtype">double</span> PowerCandela() <span class="keyword">const</span>;</div><div class="line"><a name="l00137"></a><span class="lineno"> 137</span>&#160; </div><div class="line"><a name="l00138"></a><span class="lineno"> 138</span>&#160; <span class="keywordtype">void</span> SetPowerWatts( <span class="keywordtype">double</span> );</div><div class="line"><a name="l00139"></a><span class="lineno"> 139</span>&#160; <span class="keywordtype">void</span> SetPowerLumens( <span class="keywordtype">double</span> );</div><div class="line"><a name="l00140"></a><span class="lineno"> 140</span>&#160; <span class="keywordtype">void</span> SetPowerCandela( <span class="keywordtype">double</span> );</div><div class="line"><a name="l00141"></a><span class="lineno"> 141</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00142"></a><span class="lineno"> 142</span>&#160;<span class="comment"> /////////////////////////////////////////////////////////</span></div><div class="line"><a name="l00143"></a><span class="lineno"> 143</span>&#160;<span class="comment"></span> <span class="comment">//</span></div><div class="line"><a name="l00144"></a><span class="lineno"> 144</span>&#160; <span class="comment">// colors</span></div><div class="line"><a name="l00145"></a><span class="lineno"> 145</span>&#160; <span class="comment">//</span></div><div class="line"><a name="l00146"></a><span class="lineno"> 146</span>&#160; <span class="keywordtype">void</span> SetAmbient( <a class="code" href="../../d0/df9/class_o_n___color.html">ON_Color</a> );</div><div class="line"><a name="l00147"></a><span class="lineno"> 147</span>&#160; <span class="keywordtype">void</span> SetDiffuse( <a class="code" href="../../d0/df9/class_o_n___color.html">ON_Color</a> );</div><div class="line"><a name="l00148"></a><span class="lineno"> 148</span>&#160; <span class="keywordtype">void</span> SetSpecular( <a class="code" href="../../d0/df9/class_o_n___color.html">ON_Color</a> );</div><div class="line"><a name="l00149"></a><span class="lineno"> 149</span>&#160; <a class="code" href="../../d0/df9/class_o_n___color.html">ON_Color</a> Ambient() <span class="keyword">const</span>;</div><div class="line"><a name="l00150"></a><span class="lineno"> 150</span>&#160; <a class="code" href="../../d0/df9/class_o_n___color.html">ON_Color</a> Diffuse() <span class="keyword">const</span>;</div><div class="line"><a name="l00151"></a><span class="lineno"> 151</span>&#160; <a class="code" href="../../d0/df9/class_o_n___color.html">ON_Color</a> Specular() <span class="keyword">const</span>;</div><div class="line"><a name="l00152"></a><span class="lineno"> 152</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00153"></a><span class="lineno"> 153</span>&#160;<span class="comment"> /////////////////////////////////////////////////////////</span></div><div class="line"><a name="l00154"></a><span class="lineno"> 154</span>&#160;<span class="comment"></span> <span class="comment">//</span></div><div class="line"><a name="l00155"></a><span class="lineno"> 155</span>&#160; <span class="comment">// attenuation settings (ignored for &quot;directional&quot; and &quot;ambient&quot; lights)</span></div><div class="line"><a name="l00156"></a><span class="lineno"> 156</span>&#160; <span class="comment">// attenuation = 1/(a[0] + d*a[1] + d^2*a[2]) where d = distance to light</span></div><div class="line"><a name="l00157"></a><span class="lineno"> 157</span>&#160; <span class="comment">//</span></div><div class="line"><a name="l00158"></a><span class="lineno"> 158</span>&#160; <span class="keywordtype">void</span> SetAttenuation(<span class="keywordtype">double</span>,<span class="keywordtype">double</span>,<span class="keywordtype">double</span>);</div><div class="line"><a name="l00159"></a><span class="lineno"> 159</span>&#160; <span class="keywordtype">void</span> SetAttenuation(<span class="keyword">const</span> <a class="code" href="../../d5/dae/class_o_n__3d_vector.html">ON_3dVector</a>&amp;);</div><div class="line"><a name="l00160"></a><span class="lineno"> 160</span>&#160; <a class="code" href="../../d5/dae/class_o_n__3d_vector.html">ON_3dVector</a> Attenuation() <span class="keyword">const</span>;</div><div class="line"><a name="l00161"></a><span class="lineno"> 161</span>&#160; <span class="keywordtype">double</span> Attenuation(<span class="keywordtype">double</span>) <span class="keyword">const</span>; <span class="comment">// computes 1/(a[0] + d*a[1] + d^2*a[2]) where d = argument</span></div><div class="line"><a name="l00162"></a><span class="lineno"> 162</span>&#160; <span class="comment">// returns 0 if a[0] + d*a[1] + d^2*a[2] &lt;= 0</span></div><div class="line"><a name="l00163"></a><span class="lineno"> 163</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00164"></a><span class="lineno"> 164</span>&#160;<span class="comment"> /////////////////////////////////////////////////////////</span></div><div class="line"><a name="l00165"></a><span class="lineno"> 165</span>&#160;<span class="comment"></span> <span class="comment">//</span></div><div class="line"><a name="l00166"></a><span class="lineno"> 166</span>&#160; <span class="comment">// spot light parameters (ignored for non-spot lights)</span></div><div class="line"><a name="l00167"></a><span class="lineno"> 167</span>&#160; <span class="comment">//</span></div><div class="line"><a name="l00168"></a><span class="lineno"> 168</span>&#160; <span class="comment">// angle = 0 to 90 degrees</span></div><div class="line"><a name="l00169"></a><span class="lineno"> 169</span>&#160; <span class="comment">// exponent = 0 to 128 (0=uniform, 128=high focus)</span></div><div class="line"><a name="l00170"></a><span class="lineno"> 170</span>&#160; <span class="comment">//</span></div><div class="line"><a name="l00171"></a><span class="lineno"> 171</span>&#160; <span class="keywordtype">void</span> SetSpotAngleDegrees( <span class="keywordtype">double</span> );</div><div class="line"><a name="l00172"></a><span class="lineno"> 172</span>&#160; <span class="keywordtype">double</span> SpotAngleDegrees() <span class="keyword">const</span>;</div><div class="line"><a name="l00173"></a><span class="lineno"> 173</span>&#160;</div><div class="line"><a name="l00174"></a><span class="lineno"> 174</span>&#160; <span class="keywordtype">void</span> SetSpotAngleRadians( <span class="keywordtype">double</span> );</div><div class="line"><a name="l00175"></a><span class="lineno"> 175</span>&#160; <span class="keywordtype">double</span> SpotAngleRadians() <span class="keyword">const</span>;</div><div class="line"><a name="l00176"></a><span class="lineno"> 176</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00177"></a><span class="lineno"> 177</span>&#160;<span class="comment"> //////////</span></div><div class="line"><a name="l00178"></a><span class="lineno"> 178</span>&#160;<span class="comment"></span> <span class="comment">// The spot exponent varies from 0.0 to 128.0 and provides</span></div><div class="line"><a name="l00179"></a><span class="lineno"> 179</span>&#160; <span class="comment">// an exponential interface for controling the focus or </span></div><div class="line"><a name="l00180"></a><span class="lineno"> 180</span>&#160; <span class="comment">// concentration of a spotlight (like the </span></div><div class="line"><a name="l00181"></a><span class="lineno"> 181</span>&#160; <span class="comment">// OpenGL GL_SPOT_EXPONENT parameter). The spot exponent</span></div><div class="line"><a name="l00182"></a><span class="lineno"> 182</span>&#160; <span class="comment">// and hot spot parameters are linked; changing one will</span></div><div class="line"><a name="l00183"></a><span class="lineno"> 183</span>&#160; <span class="comment">// change the other.</span></div><div class="line"><a name="l00184"></a><span class="lineno"> 184</span>&#160; <span class="comment">// A hot spot setting of 0.0 corresponds to a spot exponent of 128.</span></div><div class="line"><a name="l00185"></a><span class="lineno"> 185</span>&#160; <span class="comment">// A hot spot setting of 1.0 corresponds to a spot exponent of 0.0.</span></div><div class="line"><a name="l00186"></a><span class="lineno"> 186</span>&#160; <span class="keywordtype">void</span> SetSpotExponent( <span class="keywordtype">double</span> );</div><div class="line"><a name="l00187"></a><span class="lineno"> 187</span>&#160; <span class="keywordtype">double</span> SpotExponent() <span class="keyword">const</span>;</div><div class="line"><a name="l00188"></a><span class="lineno"> 188</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00189"></a><span class="lineno"> 189</span>&#160;<span class="comment"> //////////</span></div><div class="line"><a name="l00190"></a><span class="lineno"> 190</span>&#160;<span class="comment"></span> <span class="comment">// The hot spot setting runs from 0.0 to 1.0 and is used to</span></div><div class="line"><a name="l00191"></a><span class="lineno"> 191</span>&#160; <span class="comment">// provides a linear interface for controling the focus or </span></div><div class="line"><a name="l00192"></a><span class="lineno"> 192</span>&#160; <span class="comment">// concentration of a spotlight.</span></div><div class="line"><a name="l00193"></a><span class="lineno"> 193</span>&#160; <span class="comment">// A hot spot setting of 0.0 corresponds to a spot exponent of 128.</span></div><div class="line"><a name="l00194"></a><span class="lineno"> 194</span>&#160; <span class="comment">// A hot spot setting of 1.0 corresponds to a spot exponent of 0.0.</span></div><div class="line"><a name="l00195"></a><span class="lineno"> 195</span>&#160; <span class="keywordtype">void</span> SetHotSpot( <span class="keywordtype">double</span> );</div><div class="line"><a name="l00196"></a><span class="lineno"> 196</span>&#160; <span class="keywordtype">double</span> HotSpot() <span class="keyword">const</span>;</div><div class="line"><a name="l00197"></a><span class="lineno"> 197</span>&#160;</div><div class="line"><a name="l00198"></a><span class="lineno"> 198</span>&#160; <span class="comment">// The spotlight radii are useful for display UI.</span></div><div class="line"><a name="l00199"></a><span class="lineno"> 199</span>&#160; <span class="keywordtype">bool</span> GetSpotLightRadii( <span class="keywordtype">double</span>* inner_radius, <span class="keywordtype">double</span>* outer_radius ) <span class="keyword">const</span>;</div><div class="line"><a name="l00200"></a><span class="lineno"> 200</span>&#160;</div><div class="line"><a name="l00201"></a><span class="lineno"> 201</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00202"></a><span class="lineno"> 202</span>&#160;<span class="comment"> /////////////////////////////////////////////////////////</span></div><div class="line"><a name="l00203"></a><span class="lineno"> 203</span>&#160;<span class="comment"></span> <span class="comment">//</span></div><div class="line"><a name="l00204"></a><span class="lineno"> 204</span>&#160; <span class="comment">// linear and rectangular light parameters</span></div><div class="line"><a name="l00205"></a><span class="lineno"> 205</span>&#160; <span class="comment">// (ignored for non-linear/rectangular lights)</span></div><div class="line"><a name="l00206"></a><span class="lineno"> 206</span>&#160; <span class="comment">//</span></div><div class="line"><a name="l00207"></a><span class="lineno"> 207</span>&#160; <span class="keywordtype">void</span> SetLength( <span class="keyword">const</span> <a class="code" href="../../d5/dae/class_o_n__3d_vector.html">ON_3dVector</a>&amp; );</div><div class="line"><a name="l00208"></a><span class="lineno"> 208</span>&#160; <a class="code" href="../../d5/dae/class_o_n__3d_vector.html">ON_3dVector</a> Length() <span class="keyword">const</span>;</div><div class="line"><a name="l00209"></a><span class="lineno"> 209</span>&#160;</div><div class="line"><a name="l00210"></a><span class="lineno"> 210</span>&#160; <span class="keywordtype">void</span> SetWidth( <span class="keyword">const</span> <a class="code" href="../../d5/dae/class_o_n__3d_vector.html">ON_3dVector</a>&amp; );</div><div class="line"><a name="l00211"></a><span class="lineno"> 211</span>&#160; <a class="code" href="../../d5/dae/class_o_n__3d_vector.html">ON_3dVector</a> Width() <span class="keyword">const</span>;</div><div class="line"><a name="l00212"></a><span class="lineno"> 212</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00213"></a><span class="lineno"> 213</span>&#160;<span class="comment"> /////////////////////////////////////////////////////////</span></div><div class="line"><a name="l00214"></a><span class="lineno"> 214</span>&#160;<span class="comment"></span> <span class="comment">//</span></div><div class="line"><a name="l00215"></a><span class="lineno"> 215</span>&#160; <span class="comment">// shadow parameters (ignored for non-spot lights)</span></div><div class="line"><a name="l00216"></a><span class="lineno"> 216</span>&#160; <span class="comment">//</span></div><div class="line"><a name="l00217"></a><span class="lineno"> 217</span>&#160; <span class="comment">// shadow intensity 0.0 = does not cast any shadows</span></div><div class="line"><a name="l00218"></a><span class="lineno"> 218</span>&#160; <span class="comment">// 1.0 = casts black shadows</span></div><div class="line"><a name="l00219"></a><span class="lineno"> 219</span>&#160; <span class="comment">//</span></div><div class="line"><a name="l00220"></a><span class="lineno"> 220</span>&#160; <span class="keywordtype">void</span> SetShadowIntensity(<span class="keywordtype">double</span>);</div><div class="line"><a name="l00221"></a><span class="lineno"> 221</span>&#160; <span class="keywordtype">double</span> ShadowIntensity() <span class="keyword">const</span>;</div><div class="line"><a name="l00222"></a><span class="lineno"> 222</span>&#160; </div><div class="line"><a name="l00223"></a><span class="lineno"> 223</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00224"></a><span class="lineno"> 224</span>&#160;<span class="comment"> /////////////////////////////////////////////////////////</span></div><div class="line"><a name="l00225"></a><span class="lineno"> 225</span>&#160;<span class="comment"></span> <span class="comment">//</span></div><div class="line"><a name="l00226"></a><span class="lineno"> 226</span>&#160; <span class="comment">// light index</span></div><div class="line"><a name="l00227"></a><span class="lineno"> 227</span>&#160; <span class="comment">//</span></div><div class="line"><a name="l00228"></a><span class="lineno"> 228</span>&#160; <span class="keywordtype">void</span> SetLightIndex( <span class="keywordtype">int</span> );</div><div class="line"><a name="l00229"></a><span class="lineno"> 229</span>&#160; <span class="keywordtype">int</span> LightIndex() <span class="keyword">const</span>;</div><div class="line"><a name="l00230"></a><span class="lineno"> 230</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00231"></a><span class="lineno"> 231</span>&#160;<span class="comment"> /////////////////////////////////////////////////////////</span></div><div class="line"><a name="l00232"></a><span class="lineno"> 232</span>&#160;<span class="comment"></span> <span class="comment">//</span></div><div class="line"><a name="l00233"></a><span class="lineno"> 233</span>&#160; <span class="comment">// light name</span></div><div class="line"><a name="l00234"></a><span class="lineno"> 234</span>&#160; <span class="comment">//</span></div><div class="line"><a name="l00235"></a><span class="lineno"> 235</span>&#160; <span class="keywordtype">void</span> SetLightName( <span class="keyword">const</span> <span class="keywordtype">char</span>* );</div><div class="line"><a name="l00236"></a><span class="lineno"> 236</span>&#160; <span class="keywordtype">void</span> SetLightName( <span class="keyword">const</span> <span class="keywordtype">wchar_t</span>* );</div><div class="line"><a name="l00237"></a><span class="lineno"> 237</span>&#160; <span class="keyword">const</span> <a class="code" href="../../d1/d11/class_o_n__w_string.html">ON_wString</a>&amp; LightName() <span class="keyword">const</span>;</div><div class="line"><a name="l00238"></a><span class="lineno"> 238</span>&#160;</div><div class="line"><a name="l00239"></a><span class="lineno"> 239</span>&#160;<span class="keyword">public</span>:</div><div class="line"><a name="l00240"></a><span class="lineno"><a class="line" href="../../d0/df3/class_o_n___light.html#afc6a38a7d2d67eba4606eb19a38af87b"> 240</a></span>&#160; <span class="keywordtype">int</span> <a class="code" href="../../d0/df3/class_o_n___light.html#afc6a38a7d2d67eba4606eb19a38af87b">m_light_index</a>;</div><div class="line"><a name="l00241"></a><span class="lineno"><a class="line" href="../../d0/df3/class_o_n___light.html#a304aeeb7d54cfd2050e6d8847018e54b"> 241</a></span>&#160; <a class="code" href="../../d8/db4/struct_o_n___u_u_i_d__struct.html">ON_UUID</a> <a class="code" href="../../d0/df3/class_o_n___light.html#a304aeeb7d54cfd2050e6d8847018e54b">m_light_id</a>;</div><div class="line"><a name="l00242"></a><span class="lineno"><a class="line" href="../../d0/df3/class_o_n___light.html#ad9449f22e1d4914618c001339d1e8b85"> 242</a></span>&#160; <a class="code" href="../../d1/d11/class_o_n__w_string.html">ON_wString</a> <a class="code" href="../../d0/df3/class_o_n___light.html#ad9449f22e1d4914618c001339d1e8b85">m_light_name</a>;</div><div class="line"><a name="l00243"></a><span class="lineno"> 243</span>&#160;</div><div class="line"><a name="l00244"></a><span class="lineno"><a class="line" href="../../d0/df3/class_o_n___light.html#a5de838bf51308259606aed429b277c1d"> 244</a></span>&#160; <span class="keywordtype">bool</span> <a class="code" href="../../d0/df3/class_o_n___light.html#a5de838bf51308259606aed429b277c1d">m_bOn</a>; <span class="comment">// true if light is on</span></div><div class="line"><a name="l00245"></a><span class="lineno"><a class="line" href="../../d0/df3/class_o_n___light.html#a087c580d6dd773bd3283e6b0d2a687df"> 245</a></span>&#160; ON::light_style <a class="code" href="../../d0/df3/class_o_n___light.html#a087c580d6dd773bd3283e6b0d2a687df">m_style</a>; <span class="comment">// style of light</span></div><div class="line"><a name="l00246"></a><span class="lineno"> 246</span>&#160;</div><div class="line"><a name="l00247"></a><span class="lineno"><a class="line" href="../../d0/df3/class_o_n___light.html#a6f68132eb287595177c38f7b6ff01fe6"> 247</a></span>&#160; <a class="code" href="../../d0/df9/class_o_n___color.html">ON_Color</a> <a class="code" href="../../d0/df3/class_o_n___light.html#a6f68132eb287595177c38f7b6ff01fe6">m_ambient</a>;</div><div class="line"><a name="l00248"></a><span class="lineno"><a class="line" href="../../d0/df3/class_o_n___light.html#a95c6ddcf6382ebafefc317a089472612"> 248</a></span>&#160; <a class="code" href="../../d0/df9/class_o_n___color.html">ON_Color</a> <a class="code" href="../../d0/df3/class_o_n___light.html#a95c6ddcf6382ebafefc317a089472612">m_diffuse</a>;</div><div class="line"><a name="l00249"></a><span class="lineno"><a class="line" href="../../d0/df3/class_o_n___light.html#a15547702f3959ac373c88fdd05533e7c"> 249</a></span>&#160; <a class="code" href="../../d0/df9/class_o_n___color.html">ON_Color</a> <a class="code" href="../../d0/df3/class_o_n___light.html#a15547702f3959ac373c88fdd05533e7c">m_specular</a>;</div><div class="line"><a name="l00250"></a><span class="lineno"> 250</span>&#160; </div><div class="line"><a name="l00251"></a><span class="lineno"><a class="line" href="../../d0/df3/class_o_n___light.html#a4489facefda5d6f1368e72173542f586"> 251</a></span>&#160; <a class="code" href="../../d5/dae/class_o_n__3d_vector.html">ON_3dVector</a> <a class="code" href="../../d0/df3/class_o_n___light.html#a4489facefda5d6f1368e72173542f586">m_direction</a>; <span class="comment">// ignored for &quot;point&quot; and &quot;ambient&quot; lights</span></div><div class="line"><a name="l00252"></a><span class="lineno"><a class="line" href="../../d0/df3/class_o_n___light.html#a1306a1196d8a141a19df31bbb194a0f7"> 252</a></span>&#160; <a class="code" href="../../d2/d35/class_o_n__3d_point.html">ON_3dPoint</a> <a class="code" href="../../d0/df3/class_o_n___light.html#a1306a1196d8a141a19df31bbb194a0f7">m_location</a>; <span class="comment">// ignored for &quot;directional&quot; and &quot;ambient&quot; lights</span></div><div class="line"><a name="l00253"></a><span class="lineno"><a class="line" href="../../d0/df3/class_o_n___light.html#a610551e8298eb97a752f3ee8dd88aa60"> 253</a></span>&#160; <a class="code" href="../../d5/dae/class_o_n__3d_vector.html">ON_3dVector</a> <a class="code" href="../../d0/df3/class_o_n___light.html#a610551e8298eb97a752f3ee8dd88aa60">m_length</a>; <span class="comment">// only for linear and rectangular lights</span></div><div class="line"><a name="l00254"></a><span class="lineno"> 254</span>&#160; <span class="comment">// ends of linear lights are m_location and m_location+m_length</span></div><div class="line"><a name="l00255"></a><span class="lineno"><a class="line" href="../../d0/df3/class_o_n___light.html#aa034490c778d16ebf93d9876d17d6d3c"> 255</a></span>&#160; <a class="code" href="../../d5/dae/class_o_n__3d_vector.html">ON_3dVector</a> <a class="code" href="../../d0/df3/class_o_n___light.html#aa034490c778d16ebf93d9876d17d6d3c">m_width</a>; <span class="comment">// only for rectangular lights</span></div><div class="line"><a name="l00256"></a><span class="lineno"> 256</span>&#160; <span class="comment">// corners of rectangular lights are m_location, m_location+m_length,</span></div><div class="line"><a name="l00257"></a><span class="lineno"> 257</span>&#160; <span class="comment">// m_location+m_width, m_location+m_width+m_length</span></div><div class="line"><a name="l00258"></a><span class="lineno"> 258</span>&#160;</div><div class="line"><a name="l00259"></a><span class="lineno"><a class="line" href="../../d0/df3/class_o_n___light.html#a7b3f2c6ad438bd36e26bc16906296a35"> 259</a></span>&#160; <span class="keywordtype">double</span> <a class="code" href="../../d0/df3/class_o_n___light.html#a7b3f2c6ad438bd36e26bc16906296a35">m_intensity</a>; <span class="comment">// Linear dimming/brightening factor: 0.0 = off, 1.0 = 100%.</span></div><div class="line"><a name="l00260"></a><span class="lineno"> 260</span>&#160; <span class="comment">// Values &lt; 0.0 and values &gt; 1.0 are permitted but are</span></div><div class="line"><a name="l00261"></a><span class="lineno"> 261</span>&#160; <span class="comment">// not consistently interpreted by various renderers.</span></div><div class="line"><a name="l00262"></a><span class="lineno"> 262</span>&#160; <span class="comment">// Renderers should clamp the range to [0.0, 1.0] if their</span></div><div class="line"><a name="l00263"></a><span class="lineno"> 263</span>&#160; <span class="comment">// lighting model does not support more exotic interpretations</span></div><div class="line"><a name="l00264"></a><span class="lineno"> 264</span>&#160; <span class="comment">// of m_intensity.</span></div><div class="line"><a name="l00265"></a><span class="lineno"><a class="line" href="../../d0/df3/class_o_n___light.html#a37e9a6d12b83c335287c73b9036a83cc"> 265</a></span>&#160; <span class="keywordtype">double</span> <a class="code" href="../../d0/df3/class_o_n___light.html#a37e9a6d12b83c335287c73b9036a83cc">m_watts</a>; <span class="comment">// Used by lighting models that reference lighting fixtures.</span></div><div class="line"><a name="l00266"></a><span class="lineno"> 266</span>&#160; <span class="comment">// Values &lt; 0.0 are invalid. If m_watts is 0.0, the</span></div><div class="line"><a name="l00267"></a><span class="lineno"> 267</span>&#160; <span class="comment">// value is ignored.</span></div><div class="line"><a name="l00268"></a><span class="lineno"> 268</span>&#160;</div><div class="line"><a name="l00269"></a><span class="lineno"> 269</span>&#160; <span class="comment">// spot settings - ignored for non-spot lights</span></div><div class="line"><a name="l00270"></a><span class="lineno"><a class="line" href="../../d0/df3/class_o_n___light.html#a22bd1fcc68ef985e139cc3fe15d0d611"> 270</a></span>&#160; <span class="keywordtype">double</span> <a class="code" href="../../d0/df3/class_o_n___light.html#a22bd1fcc68ef985e139cc3fe15d0d611">m_spot_angle</a>; <span class="comment">// 0.0 to 90.0</span></div><div class="line"><a name="l00271"></a><span class="lineno"><a class="line" href="../../d0/df3/class_o_n___light.html#a110dc8788be2b1f45561b6c722a070f2"> 271</a></span>&#160; <span class="keywordtype">double</span> <a class="code" href="../../d0/df3/class_o_n___light.html#a110dc8788be2b1f45561b6c722a070f2">m_spot_exponent</a>; <span class="comment">// 0.0 to 128.0</span></div><div class="line"><a name="l00272"></a><span class="lineno"> 272</span>&#160; <span class="comment">// 0.0 = uniform</span></div><div class="line"><a name="l00273"></a><span class="lineno"> 273</span>&#160; <span class="comment">// 128.0 = high focus</span></div><div class="line"><a name="l00274"></a><span class="lineno"><a class="line" href="../../d0/df3/class_o_n___light.html#a52a4e4fd3e4e80def77731ec311e740f"> 274</a></span>&#160; <span class="keywordtype">double</span> <a class="code" href="../../d0/df3/class_o_n___light.html#a52a4e4fd3e4e80def77731ec311e740f">m_hotspot</a>; <span class="comment">// 0.0 to 1.0 (See SetHotSpot() for details)</span></div><div class="line"><a name="l00275"></a><span class="lineno"> 275</span>&#160;</div><div class="line"><a name="l00276"></a><span class="lineno"> 276</span>&#160; <span class="comment">// attenuation settings - ignored for &quot;directional&quot; and &quot;ambient&quot; lights</span></div><div class="line"><a name="l00277"></a><span class="lineno"><a class="line" href="../../d0/df3/class_o_n___light.html#a43695ae25655b78d28a660005fffa8a8"> 277</a></span>&#160; <a class="code" href="../../d5/dae/class_o_n__3d_vector.html">ON_3dVector</a> <a class="code" href="../../d0/df3/class_o_n___light.html#a43695ae25655b78d28a660005fffa8a8">m_attenuation</a>; <span class="comment">// each entry &gt;= 0.0</span></div><div class="line"><a name="l00278"></a><span class="lineno"> 278</span>&#160; <span class="comment">// att = 1/(a[0] + d*a[1] + d^2*a[2])</span></div><div class="line"><a name="l00279"></a><span class="lineno"> 279</span>&#160; <span class="comment">// where d = distance to light</span></div><div class="line"><a name="l00280"></a><span class="lineno"> 280</span>&#160;</div><div class="line"><a name="l00281"></a><span class="lineno"> 281</span>&#160; <span class="comment">// shawdow casting</span></div><div class="line"><a name="l00282"></a><span class="lineno"><a class="line" href="../../d0/df3/class_o_n___light.html#a784c8bd77fb05f2620bbd45229239c0a"> 282</a></span>&#160; <span class="keywordtype">double</span> <a class="code" href="../../d0/df3/class_o_n___light.html#a784c8bd77fb05f2620bbd45229239c0a">m_shadow_intensity</a>; <span class="comment">// 0.0 = no shadow casting, 1.0 = full shadow casting</span></div><div class="line"><a name="l00283"></a><span class="lineno"> 283</span>&#160;};</div><div class="line"><a name="l00284"></a><span class="lineno"> 284</span>&#160;</div><div class="line"><a name="l00285"></a><span class="lineno"> 285</span>&#160;</div><div class="line"><a name="l00286"></a><span class="lineno"> 286</span>&#160;</div><div class="line"><a name="l00287"></a><span class="lineno"> 287</span>&#160;<span class="preprocessor">#endif</span></div><div class="ttc" id="class_o_n___geometry_html_add710872e89bc29e1ed1321b3e70b1b1"><div class="ttname"><a href="../../df/de0/class_o_n___geometry.html#add710872e89bc29e1ed1321b3e70b1b1">ON_Geometry::Transform</a></div><div class="ttdeci">virtual bool Transform(const ON_Xform &amp;xform)</div></div>
<div class="ttc" id="class_o_n___light_html_a7b3f2c6ad438bd36e26bc16906296a35"><div class="ttname"><a href="../../d0/df3/class_o_n___light.html#a7b3f2c6ad438bd36e26bc16906296a35">ON_Light::m_intensity</a></div><div class="ttdeci">double m_intensity</div><div class="ttdef"><b>Definition:</b> opennurbs_light.h:259</div></div>
<div class="ttc" id="struct_o_n___u_u_i_d__struct_html"><div class="ttname"><a href="../../d8/db4/struct_o_n___u_u_i_d__struct.html">ON_UUID_struct</a></div><div class="ttdoc">ON_UUID is a 16 byte universally unique identifier. </div><div class="ttdef"><b>Definition:</b> opennurbs_uuid.h:32</div></div>
<div class="ttc" id="class_o_n___light_html_a5de838bf51308259606aed429b277c1d"><div class="ttname"><a href="../../d0/df3/class_o_n___light.html#a5de838bf51308259606aed429b277c1d">ON_Light::m_bOn</a></div><div class="ttdeci">bool m_bOn</div><div class="ttdoc">true if light is on </div><div class="ttdef"><b>Definition:</b> opennurbs_light.h:244</div></div>
<div class="ttc" id="class_o_n___geometry_html_a0d66ab16e2fddfd1b3e6cf3d6ebbd364"><div class="ttname"><a href="../../df/de0/class_o_n___geometry.html#a0d66ab16e2fddfd1b3e6cf3d6ebbd364">ON_Geometry::Dimension</a></div><div class="ttdeci">virtual int Dimension() const</div></div>
<div class="ttc" id="class_o_n___geometry_html_ad615e08fe92af659c8d10cbb4f8fc5e3"><div class="ttname"><a href="../../df/de0/class_o_n___geometry.html#ad615e08fe92af659c8d10cbb4f8fc5e3">ON_Geometry::GetBBox</a></div><div class="ttdeci">virtual bool GetBBox(double *boxmin, double *boxmax, bool bGrowBox=false) const</div></div>
<div class="ttc" id="class_o_n___light_html_a52a4e4fd3e4e80def77731ec311e740f"><div class="ttname"><a href="../../d0/df3/class_o_n___light.html#a52a4e4fd3e4e80def77731ec311e740f">ON_Light::m_hotspot</a></div><div class="ttdeci">double m_hotspot</div><div class="ttdoc">0.0 to 1.0 (See SetHotSpot() for details) </div><div class="ttdef"><b>Definition:</b> opennurbs_light.h:274</div></div>
<div class="ttc" id="class_o_n___light_html_a087c580d6dd773bd3283e6b0d2a687df"><div class="ttname"><a href="../../d0/df3/class_o_n___light.html#a087c580d6dd773bd3283e6b0d2a687df">ON_Light::m_style</a></div><div class="ttdeci">ON::light_style m_style</div><div class="ttdoc">style of light </div><div class="ttdef"><b>Definition:</b> opennurbs_light.h:245</div></div>
<div class="ttc" id="class_o_n___light_html_a4489facefda5d6f1368e72173542f586"><div class="ttname"><a href="../../d0/df3/class_o_n___light.html#a4489facefda5d6f1368e72173542f586">ON_Light::m_direction</a></div><div class="ttdeci">ON_3dVector m_direction</div><div class="ttdoc">ignored for &quot;point&quot; and &quot;ambient&quot; lights </div><div class="ttdef"><b>Definition:</b> opennurbs_light.h:251</div></div>
<div class="ttc" id="class_o_n___light_html_a95c6ddcf6382ebafefc317a089472612"><div class="ttname"><a href="../../d0/df3/class_o_n___light.html#a95c6ddcf6382ebafefc317a089472612">ON_Light::m_diffuse</a></div><div class="ttdeci">ON_Color m_diffuse</div><div class="ttdef"><b>Definition:</b> opennurbs_light.h:248</div></div>
<div class="ttc" id="class_o_n___light_html_afc6a38a7d2d67eba4606eb19a38af87b"><div class="ttname"><a href="../../d0/df3/class_o_n___light.html#afc6a38a7d2d67eba4606eb19a38af87b">ON_Light::m_light_index</a></div><div class="ttdeci">int m_light_index</div><div class="ttdef"><b>Definition:</b> opennurbs_light.h:240</div></div>
<div class="ttc" id="class_o_n___light_html_a15547702f3959ac373c88fdd05533e7c"><div class="ttname"><a href="../../d0/df3/class_o_n___light.html#a15547702f3959ac373c88fdd05533e7c">ON_Light::m_specular</a></div><div class="ttdeci">ON_Color m_specular</div><div class="ttdef"><b>Definition:</b> opennurbs_light.h:249</div></div>
<div class="ttc" id="class_o_n___light_html"><div class="ttname"><a href="../../d0/df3/class_o_n___light.html">ON_Light</a></div><div class="ttdef"><b>Definition:</b> opennurbs_light.h:20</div></div>
<div class="ttc" id="class_o_n__w_string_html"><div class="ttname"><a href="../../d1/d11/class_o_n__w_string.html">ON_wString</a></div><div class="ttdef"><b>Definition:</b> opennurbs_string.h:2089</div></div>
<div class="ttc" id="class_o_n___object_html_afa19aee4a411a8fda53aff00bd02d86e"><div class="ttname"><a href="../../d9/d7b/class_o_n___object.html#afa19aee4a411a8fda53aff00bd02d86e">ON_Object::ObjectType</a></div><div class="ttdeci">virtual ON::object_type ObjectType() const</div></div>
<div class="ttc" id="class_o_n___geometry_html"><div class="ttname"><a href="../../df/de0/class_o_n___geometry.html">ON_Geometry</a></div><div class="ttdef"><b>Definition:</b> opennurbs_geometry.h:36</div></div>
<div class="ttc" id="class_o_n___color_html"><div class="ttname"><a href="../../d0/df9/class_o_n___color.html">ON_Color</a></div><div class="ttdef"><b>Definition:</b> opennurbs_color.h:24</div></div>
<div class="ttc" id="class_o_n___light_html_a610551e8298eb97a752f3ee8dd88aa60"><div class="ttname"><a href="../../d0/df3/class_o_n___light.html#a610551e8298eb97a752f3ee8dd88aa60">ON_Light::m_length</a></div><div class="ttdeci">ON_3dVector m_length</div><div class="ttdef"><b>Definition:</b> opennurbs_light.h:253</div></div>
<div class="ttc" id="class_o_n___light_html_a784c8bd77fb05f2620bbd45229239c0a"><div class="ttname"><a href="../../d0/df3/class_o_n___light.html#a784c8bd77fb05f2620bbd45229239c0a">ON_Light::m_shadow_intensity</a></div><div class="ttdeci">double m_shadow_intensity</div><div class="ttdoc">shawdow casting </div><div class="ttdef"><b>Definition:</b> opennurbs_light.h:282</div></div>
<div class="ttc" id="class_o_n___light_html_a22bd1fcc68ef985e139cc3fe15d0d611"><div class="ttname"><a href="../../d0/df3/class_o_n___light.html#a22bd1fcc68ef985e139cc3fe15d0d611">ON_Light::m_spot_angle</a></div><div class="ttdeci">double m_spot_angle</div><div class="ttdoc">spot settings - ignored for non-spot lights </div><div class="ttdef"><b>Definition:</b> opennurbs_light.h:270</div></div>
<div class="ttc" id="class_o_n___xform_html"><div class="ttname"><a href="../../d3/d13/class_o_n___xform.html">ON_Xform</a></div><div class="ttdef"><b>Definition:</b> opennurbs_xform.h:28</div></div>
<div class="ttc" id="class_o_n___light_html_a93c6e3443f9b6034296b2d6eb0e13d82"><div class="ttname"><a href="../../d0/df3/class_o_n___light.html#a93c6e3443f9b6034296b2d6eb0e13d82">ON_Light::Unset</a></div><div class="ttdeci">static const ON_Light Unset</div><div class="ttdef"><b>Definition:</b> opennurbs_light.h:30</div></div>
<div class="ttc" id="class_o_n___light_html_a43695ae25655b78d28a660005fffa8a8"><div class="ttname"><a href="../../d0/df3/class_o_n___light.html#a43695ae25655b78d28a660005fffa8a8">ON_Light::m_attenuation</a></div><div class="ttdeci">ON_3dVector m_attenuation</div><div class="ttdoc">attenuation settings - ignored for &quot;directional&quot; and &quot;ambient&quot; lights </div><div class="ttdef"><b>Definition:</b> opennurbs_light.h:277</div></div>
<div class="ttc" id="class_o_n___object_html_a21c7b04a80f1806c3a45f72d7c491a44"><div class="ttname"><a href="../../d9/d7b/class_o_n___object.html#a21c7b04a80f1806c3a45f72d7c491a44">ON_Object::Dump</a></div><div class="ttdeci">virtual void Dump(ON_TextLog &amp;) const</div></div>
<div class="ttc" id="class_o_n___light_html_a1306a1196d8a141a19df31bbb194a0f7"><div class="ttname"><a href="../../d0/df3/class_o_n___light.html#a1306a1196d8a141a19df31bbb194a0f7">ON_Light::m_location</a></div><div class="ttdeci">ON_3dPoint m_location</div><div class="ttdoc">ignored for &quot;directional&quot; and &quot;ambient&quot; lights </div><div class="ttdef"><b>Definition:</b> opennurbs_light.h:252</div></div>
<div class="ttc" id="class_o_n___light_html_a110dc8788be2b1f45561b6c722a070f2"><div class="ttname"><a href="../../d0/df3/class_o_n___light.html#a110dc8788be2b1f45561b6c722a070f2">ON_Light::m_spot_exponent</a></div><div class="ttdeci">double m_spot_exponent</div><div class="ttdef"><b>Definition:</b> opennurbs_light.h:271</div></div>
<div class="ttc" id="class_o_n___light_html_a6f68132eb287595177c38f7b6ff01fe6"><div class="ttname"><a href="../../d0/df3/class_o_n___light.html#a6f68132eb287595177c38f7b6ff01fe6">ON_Light::m_ambient</a></div><div class="ttdeci">ON_Color m_ambient</div><div class="ttdef"><b>Definition:</b> opennurbs_light.h:247</div></div>
<div class="ttc" id="class_o_n___light_html_a304aeeb7d54cfd2050e6d8847018e54b"><div class="ttname"><a href="../../d0/df3/class_o_n___light.html#a304aeeb7d54cfd2050e6d8847018e54b">ON_Light::m_light_id</a></div><div class="ttdeci">ON_UUID m_light_id</div><div class="ttdef"><b>Definition:</b> opennurbs_light.h:241</div></div>
<div class="ttc" id="class_o_n___geometry_html_a071e7617820ea38c40f4b3966e7daee0"><div class="ttname"><a href="../../df/de0/class_o_n___geometry.html#a071e7617820ea38c40f4b3966e7daee0">ON_Geometry::operator=</a></div><div class="ttdeci">ON_Geometry &amp; operator=(const ON_Geometry &amp;)=default</div></div>
<div class="ttc" id="class_o_n___text_log_html"><div class="ttname"><a href="../../d2/da3/class_o_n___text_log.html">ON_TextLog</a></div><div class="ttdef"><b>Definition:</b> opennurbs_textlog.h:20</div></div>
<div class="ttc" id="class_o_n___binary_archive_html"><div class="ttname"><a href="../../db/d16/class_o_n___binary_archive.html">ON_BinaryArchive</a></div><div class="ttdoc">&lt; use for generic serialization of binary data </div><div class="ttdef"><b>Definition:</b> opennurbs_archive.h:1866</div></div>
<div class="ttc" id="class_o_n___viewport_html"><div class="ttname"><a href="../../d4/deb/class_o_n___viewport.html">ON_Viewport</a></div><div class="ttdef"><b>Definition:</b> opennurbs_viewport.h:31</div></div>
<div class="ttc" id="class_o_n___object_html_a09ac9742ead91dd8f9cdd579bcbfed10"><div class="ttname"><a href="../../d9/d7b/class_o_n___object.html#a09ac9742ead91dd8f9cdd579bcbfed10">ON_Object::Read</a></div><div class="ttdeci">virtual bool Read(ON_BinaryArchive &amp;binary_archive)</div></div>
<div class="ttc" id="class_o_n__3d_point_html"><div class="ttname"><a href="../../d2/d35/class_o_n__3d_point.html">ON_3dPoint</a></div><div class="ttdef"><b>Definition:</b> opennurbs_point.h:480</div></div>
<div class="ttc" id="class_o_n___geometry_html_adf87e5ba0d9939dfabbb9f421b9d2b3b"><div class="ttname"><a href="../../df/de0/class_o_n___geometry.html#adf87e5ba0d9939dfabbb9f421b9d2b3b">ON_Geometry::IsValid</a></div><div class="ttdeci">bool IsValid(class ON_TextLog *text_log=nullptr) const override</div></div>
<div class="ttc" id="class_o_n___light_html_ad9449f22e1d4914618c001339d1e8b85"><div class="ttname"><a href="../../d0/df3/class_o_n___light.html#ad9449f22e1d4914618c001339d1e8b85">ON_Light::m_light_name</a></div><div class="ttdeci">ON_wString m_light_name</div><div class="ttdef"><b>Definition:</b> opennurbs_light.h:242</div></div>
<div class="ttc" id="class_o_n___object_html_a16eb9ab6bf0d0a614655cf9cd055871a"><div class="ttname"><a href="../../d9/d7b/class_o_n___object.html#a16eb9ab6bf0d0a614655cf9cd055871a">ON_Object::Write</a></div><div class="ttdeci">virtual bool Write(ON_BinaryArchive &amp;binary_archive) const</div></div>
<div class="ttc" id="class_o_n___object_html_a21c508d3b53458e252adbcd29e62ed09"><div class="ttname"><a href="../../d9/d7b/class_o_n___object.html#a21c508d3b53458e252adbcd29e62ed09">ON_Object::ModelObjectId</a></div><div class="ttdeci">virtual ON_UUID ModelObjectId() const</div></div>
<div class="ttc" id="class_o_n___light_html_a37e9a6d12b83c335287c73b9036a83cc"><div class="ttname"><a href="../../d0/df3/class_o_n___light.html#a37e9a6d12b83c335287c73b9036a83cc">ON_Light::m_watts</a></div><div class="ttdeci">double m_watts</div><div class="ttdef"><b>Definition:</b> opennurbs_light.h:265</div></div>
<div class="ttc" id="class_o_n__3d_vector_html"><div class="ttname"><a href="../../d5/dae/class_o_n__3d_vector.html">ON_3dVector</a></div><div class="ttdef"><b>Definition:</b> opennurbs_point.h:1182</div></div>
<div class="ttc" id="class_o_n___light_html_aa034490c778d16ebf93d9876d17d6d3c"><div class="ttname"><a href="../../d0/df3/class_o_n___light.html#aa034490c778d16ebf93d9876d17d6d3c">ON_Light::m_width</a></div><div class="ttdeci">ON_3dVector m_width</div><div class="ttdef"><b>Definition:</b> opennurbs_light.h:255</div></div>
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