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Co-authored-by: Steve Baer <steve@mcneel.com>
Co-authored-by: Nathan Letwory <nathan@mcneel.com>
Co-authored-by: Dale Lear <dalelear@mcneel.com>
This commit is contained in:
Bozo The Builder
2019-11-05 18:13:55 -08:00
committed by Will Pearson
parent b844466e88
commit 799431a63b
130 changed files with 29557 additions and 9236 deletions
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44
opennurbs_revsurface.cpp
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@@ -779,6 +779,50 @@ bool ON_RevSurface::GetNurbFormParameterFromSurfaceParameter(
return rc;
}
ON_Arc ON_RevSurface::IsoArc(
double curve_parameter
) const
{
for (;;)
{
if (nullptr == m_curve)
break;
// 8 December 2003 Chuck - fix iso extraction bug
// when m_angle[0] != 0.
ON_Circle circle;
ON_3dPoint P = m_curve->PointAt(curve_parameter);
if (false == P.IsValid())
break;
circle.plane.origin = m_axis.ClosestPointTo(P);
circle.plane.zaxis = m_axis.Tangent();
circle.plane.xaxis = P - circle.plane.origin;
circle.radius = circle.plane.xaxis.Length();
if (!circle.plane.xaxis.Unitize())
{
// 8 December 2003 Dale Lear - get valid zero radius
// arc/circle when revolute hits the axis.
// First: try middle of revolute for x-axis
P = m_curve->PointAt(m_curve->Domain().ParameterAt(0.5));
ON_3dPoint Q = m_axis.ClosestPointTo(P);
circle.plane.xaxis = P - Q;
if (!circle.plane.xaxis.Unitize())
{
// Then: just use a vector perp to zaxis
circle.plane.xaxis.PerpendicularTo(circle.plane.zaxis);
}
}
circle.plane.yaxis = ON_CrossProduct(circle.plane.zaxis, circle.plane.xaxis);
circle.plane.yaxis.Unitize();
circle.plane.UpdateEquation();
ON_Arc arc(circle, m_angle);
return arc;
}
ON_Arc arc;
arc.plane = ON_Plane::NanPlane;
arc.radius = ON_DBL_QNAN;
return arc;
}
ON_Curve* ON_RevSurface::IsoCurve( int dir, double c ) const
{