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https://github.com/Open-Cascade-SAS/OCCT.git
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cdc54fb017
OpenGl_ShaderManager::GetBgCubeMapProgram() and OpenGl_BackgroundArray::createCubeMapArray() have been corrected to draw cube in straightforward way instead of a screen-quad. Graphic3d_Camera::SetCustomStereoProjection() now recieves decomposed projection + head-to-eye matrices. Added method Graphic3d_Camera::StereoProjection() returning projection matrix without translation part. OpenGl_BackgroundArray::Render() now applies stereoscopic projection matrix in case of VR output, but keeps using mono projection matrix in case of common 3D displays.
554 lines
19 KiB
C++
554 lines
19 KiB
C++
// Created on: 2015-01-16
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// Created by: Anastasia BORISOVA
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// Copyright (c) 2015 OPEN CASCADE SAS
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//
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// This file is part of Open CASCADE Technology software library.
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//
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// This library is free software; you can redistribute it and/or modify it under
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// the terms of the GNU Lesser General Public License version 2.1 as published
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// by the Free Software Foundation, with special exception defined in the file
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// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
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// distribution for complete text of the license and disclaimer of any warranty.
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//
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// Alternatively, this file may be used under the terms of Open CASCADE
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// commercial license or contractual agreement.
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#include <OpenGl_BackgroundArray.hxx>
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#include <Aspect_FillMethod.hxx>
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#include <NCollection_AlignedAllocator.hxx>
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#include <OpenGl_Texture.hxx>
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#include <OpenGl_View.hxx>
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#include <Graphic3d_TextureParams.hxx>
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// =======================================================================
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// method : Constructor
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// purpose :
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// =======================================================================
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OpenGl_BackgroundArray::OpenGl_BackgroundArray (const Graphic3d_TypeOfBackground theType)
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: OpenGl_PrimitiveArray (NULL, Graphic3d_TOPA_TRIANGLESTRIPS, NULL, NULL, NULL),
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myType (theType),
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myFillMethod (Aspect_FM_NONE),
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myViewWidth (0),
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myViewHeight (0),
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myToUpdate (Standard_False)
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{
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myDrawMode = GL_TRIANGLE_STRIP;
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myIsFillType = true;
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myGradientParams.color1 = OpenGl_Vec4 (0.0f, 0.0f, 0.0f, 1.0f);
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myGradientParams.color2 = OpenGl_Vec4 (0.0f, 0.0f, 0.0f, 1.0f);
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myGradientParams.type = Aspect_GFM_NONE;
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}
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// =======================================================================
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// method : SetTextureParameters
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// purpose :
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// =======================================================================
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void OpenGl_BackgroundArray::SetTextureParameters (const Aspect_FillMethod theFillMethod)
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{
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if (myType != Graphic3d_TOB_TEXTURE)
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{
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return;
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}
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myFillMethod = theFillMethod;
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invalidateData();
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}
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// =======================================================================
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// method : SetTextureFillMethod
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// purpose :
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// =======================================================================
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void OpenGl_BackgroundArray::SetTextureFillMethod (const Aspect_FillMethod theFillMethod)
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{
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myFillMethod = theFillMethod;
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invalidateData();
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}
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// =======================================================================
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// method : SetGradientParameters
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// purpose :
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// =======================================================================
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void OpenGl_BackgroundArray::SetGradientParameters (const Quantity_Color& theColor1,
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const Quantity_Color& theColor2,
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const Aspect_GradientFillMethod theType)
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{
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if (myType != Graphic3d_TOB_GRADIENT)
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{
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return;
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}
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Standard_Real anR, aG, aB;
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theColor1.Values (anR, aG, aB, Quantity_TOC_RGB);
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myGradientParams.color1 = OpenGl_Vec4 ((float)anR, (float)aG, (float)aB, 0.0f);
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theColor2.Values (anR, aG, aB, Quantity_TOC_RGB);
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myGradientParams.color2 = OpenGl_Vec4 ((float)anR, (float)aG, (float)aB, 0.0f);
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myGradientParams.type = theType;
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invalidateData();
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}
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// =======================================================================
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// method : SetGradientFillMethod
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// purpose :
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// =======================================================================
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void OpenGl_BackgroundArray::SetGradientFillMethod (const Aspect_GradientFillMethod theType)
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{
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if (myType != Graphic3d_TOB_GRADIENT)
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{
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return;
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}
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myGradientParams.type = theType;
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invalidateData();
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}
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// =======================================================================
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// method : IsDefined
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// purpose :
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// =======================================================================
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bool OpenGl_BackgroundArray::IsDefined() const
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{
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switch (myType)
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{
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case Graphic3d_TOB_GRADIENT: return myGradientParams.type != Aspect_GFM_NONE;
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case Graphic3d_TOB_TEXTURE: return myFillMethod != Aspect_FM_NONE;
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case Graphic3d_TOB_CUBEMAP: return Standard_True;
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case Graphic3d_TOB_NONE: return Standard_False;
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}
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return Standard_False;
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}
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// =======================================================================
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// method : invalidateData
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// purpose :
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// =======================================================================
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void OpenGl_BackgroundArray::invalidateData()
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{
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myToUpdate = Standard_True;
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}
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// =======================================================================
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// method : init
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// purpose :
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// =======================================================================
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Standard_Boolean OpenGl_BackgroundArray::init (const Handle(OpenGl_Workspace)& theWorkspace) const
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{
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const Handle(OpenGl_Context)& aCtx = theWorkspace->GetGlContext();
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switch (myType)
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{
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case Graphic3d_TOB_GRADIENT:
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{
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if (!createGradientArray (aCtx))
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{
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return Standard_False;
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}
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break;
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}
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case Graphic3d_TOB_TEXTURE:
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{
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if (!createTextureArray (theWorkspace))
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{
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return Standard_False;
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}
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break;
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}
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case Graphic3d_TOB_CUBEMAP:
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{
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if (!createCubeMapArray())
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{
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return Standard_False;
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}
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break;
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}
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case Graphic3d_TOB_NONE:
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default:
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{
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return Standard_False;
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}
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}
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// Init VBO
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if (myIsVboInit)
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{
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clearMemoryGL (aCtx);
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}
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buildVBO (aCtx, Standard_True);
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myIsVboInit = Standard_True;
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// Data is up-to-date
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myToUpdate = Standard_False;
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return Standard_True;
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}
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// =======================================================================
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// method : createGradientArray
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// purpose :
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// =======================================================================
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Standard_Boolean OpenGl_BackgroundArray::createGradientArray (const Handle(OpenGl_Context)& theCtx) const
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{
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// Initialize data for primitive array
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Graphic3d_Attribute aGragientAttribInfo[] =
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{
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{ Graphic3d_TOA_POS, Graphic3d_TOD_VEC2 },
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{ Graphic3d_TOA_COLOR, Graphic3d_TOD_VEC3 }
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};
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if (myAttribs.IsNull())
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{
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Handle(NCollection_AlignedAllocator) anAlloc = new NCollection_AlignedAllocator (16);
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myAttribs = new Graphic3d_Buffer (anAlloc);
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}
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if (!myAttribs->Init (4, aGragientAttribInfo, 2))
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{
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return Standard_False;
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}
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OpenGl_Vec2 aVertices[4] =
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{
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OpenGl_Vec2(float(myViewWidth), 0.0f),
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OpenGl_Vec2(float(myViewWidth), float(myViewHeight)),
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OpenGl_Vec2(0.0f, 0.0f),
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OpenGl_Vec2(0.0f, float(myViewHeight))
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};
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float* aCorners[4] = {};
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float aDiagCorner1[3] = {};
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float aDiagCorner2[3] = {};
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switch (myGradientParams.type)
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{
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case Aspect_GFM_HOR:
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{
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aCorners[0] = myGradientParams.color2.ChangeData();
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aCorners[1] = myGradientParams.color2.ChangeData();
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aCorners[2] = myGradientParams.color1.ChangeData();
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aCorners[3] = myGradientParams.color1.ChangeData();
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break;
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}
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case Aspect_GFM_VER:
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{
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aCorners[0] = myGradientParams.color2.ChangeData();
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aCorners[1] = myGradientParams.color1.ChangeData();
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aCorners[2] = myGradientParams.color2.ChangeData();
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aCorners[3] = myGradientParams.color1.ChangeData();
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break;
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}
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case Aspect_GFM_DIAG1:
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{
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aCorners[0] = myGradientParams.color2.ChangeData();
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aCorners[3] = myGradientParams.color1.ChangeData();
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aDiagCorner1[0] = aDiagCorner2[0] = 0.5f * (aCorners[0][0] + aCorners[3][0]);
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aDiagCorner1[1] = aDiagCorner2[1] = 0.5f * (aCorners[0][1] + aCorners[3][1]);
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aDiagCorner1[2] = aDiagCorner2[2] = 0.5f * (aCorners[0][2] + aCorners[3][2]);
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aCorners[1] = aDiagCorner1;
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aCorners[2] = aDiagCorner2;
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break;
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}
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case Aspect_GFM_DIAG2:
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{
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aCorners[1] = myGradientParams.color1.ChangeData();
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aCorners[2] = myGradientParams.color2.ChangeData();
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aDiagCorner1[0] = aDiagCorner2[0] = 0.5f * (aCorners[1][0] + aCorners[2][0]);
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aDiagCorner1[1] = aDiagCorner2[1] = 0.5f * (aCorners[1][1] + aCorners[2][1]);
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aDiagCorner1[2] = aDiagCorner2[2] = 0.5f * (aCorners[1][2] + aCorners[2][2]);
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aCorners[0] = aDiagCorner1;
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aCorners[3] = aDiagCorner2;
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break;
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}
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case Aspect_GFM_CORNER1:
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{
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aVertices[0] = OpenGl_Vec2(float(myViewWidth), float(myViewHeight));
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aVertices[1] = OpenGl_Vec2(0.0f, float(myViewHeight));
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aVertices[2] = OpenGl_Vec2(float(myViewWidth), 0.0f);
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aVertices[3] = OpenGl_Vec2(0.0f, 0.0f);
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aCorners[0] = myGradientParams.color2.ChangeData();
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aCorners[1] = myGradientParams.color1.ChangeData();
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aCorners[2] = myGradientParams.color2.ChangeData();
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aCorners[3] = myGradientParams.color2.ChangeData();
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break;
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}
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case Aspect_GFM_CORNER2:
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{
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aCorners[0] = myGradientParams.color2.ChangeData();
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aCorners[1] = myGradientParams.color1.ChangeData();
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aCorners[2] = myGradientParams.color2.ChangeData();
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aCorners[3] = myGradientParams.color2.ChangeData();
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break;
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}
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case Aspect_GFM_CORNER3:
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{
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aVertices[0] = OpenGl_Vec2(float(myViewWidth), float(myViewHeight));
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aVertices[1] = OpenGl_Vec2(0.0f, float(myViewHeight));
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aVertices[2] = OpenGl_Vec2(float(myViewWidth), 0.0f);
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aVertices[3] = OpenGl_Vec2(0.0f, 0.0f);
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aCorners[0] = myGradientParams.color2.ChangeData();
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aCorners[1] = myGradientParams.color2.ChangeData();
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aCorners[2] = myGradientParams.color1.ChangeData();
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aCorners[3] = myGradientParams.color2.ChangeData();
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break;
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}
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case Aspect_GFM_CORNER4:
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{
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aCorners[0] = myGradientParams.color2.ChangeData();
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aCorners[1] = myGradientParams.color2.ChangeData();
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aCorners[2] = myGradientParams.color1.ChangeData();
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aCorners[3] = myGradientParams.color2.ChangeData();
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break;
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}
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case Aspect_GFM_NONE:
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{
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break;
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}
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}
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for (Standard_Integer anIt = 0; anIt < 4; ++anIt)
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{
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OpenGl_Vec2* aVertData = reinterpret_cast<OpenGl_Vec2* >(myAttribs->changeValue (anIt));
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*aVertData = aVertices[anIt];
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OpenGl_Vec3* aColorData = reinterpret_cast<OpenGl_Vec3* >(myAttribs->changeValue (anIt) + myAttribs->AttributeOffset (1));
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*aColorData = theCtx->Vec4FromQuantityColor (OpenGl_Vec4(aCorners[anIt][0], aCorners[anIt][1], aCorners[anIt][2], 1.0f)).rgb();
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}
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return Standard_True;
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}
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// =======================================================================
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// method : createTextureArray
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// purpose :
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// =======================================================================
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Standard_Boolean OpenGl_BackgroundArray::createTextureArray (const Handle(OpenGl_Workspace)& theWorkspace) const
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{
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Graphic3d_Attribute aTextureAttribInfo[] =
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{
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{ Graphic3d_TOA_POS, Graphic3d_TOD_VEC2 },
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{ Graphic3d_TOA_UV, Graphic3d_TOD_VEC2 }
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};
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if (myAttribs.IsNull())
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{
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Handle(NCollection_AlignedAllocator) anAlloc = new NCollection_AlignedAllocator (16);
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myAttribs = new Graphic3d_Buffer (anAlloc);
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}
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if (!myAttribs->Init (4, aTextureAttribInfo, 2))
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{
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return Standard_False;
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}
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GLfloat aTexRangeX = 1.0f; // texture <s> coordinate
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GLfloat aTexRangeY = 1.0f; // texture <t> coordinate
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// Set up for stretching or tiling
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GLfloat anOffsetX = 0.5f * (float )myViewWidth;
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GLfloat anOffsetY = 0.5f * (float )myViewHeight;
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// Setting this coefficient to -1.0f allows to tile textures relatively to the top-left corner of the view
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// (value 1.0f corresponds to the initial behavior - tiling from the bottom-left corner)
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GLfloat aCoef = -1.0f;
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// Get texture parameters
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const Handle(OpenGl_Context)& aCtx = theWorkspace->GetGlContext();
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const OpenGl_Aspects* anAspectFace = theWorkspace->Aspects();
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GLfloat aTextureWidth = (GLfloat )anAspectFace->TextureSet (aCtx)->First()->SizeX();
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GLfloat aTextureHeight = (GLfloat )anAspectFace->TextureSet (aCtx)->First()->SizeY();
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if (myFillMethod == Aspect_FM_CENTERED)
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{
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anOffsetX = 0.5f * aTextureWidth;
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anOffsetY = 0.5f * aTextureHeight;
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}
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else if (myFillMethod == Aspect_FM_TILED)
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{
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aTexRangeX = (GLfloat )myViewWidth / aTextureWidth;
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aTexRangeY = (GLfloat )myViewHeight / aTextureHeight;
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}
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// NOTE: texture is mapped using GL_REPEAT wrapping mode so integer part
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// is simply ignored, and negative multiplier is here for convenience only
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// and does not result e.g. in texture mirroring
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OpenGl_Vec2* aData = reinterpret_cast<OpenGl_Vec2* >(myAttribs->changeValue (0));
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aData[0] = OpenGl_Vec2 (anOffsetX, -aCoef * anOffsetY);
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aData[1] = OpenGl_Vec2 (aTexRangeX, 0.0f);
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aData = reinterpret_cast<OpenGl_Vec2* >(myAttribs->changeValue (1));
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aData[0] = OpenGl_Vec2 (anOffsetX, aCoef * anOffsetY);
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aData[1] = OpenGl_Vec2 (aTexRangeX, aCoef * aTexRangeY);
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aData = reinterpret_cast<OpenGl_Vec2* >(myAttribs->changeValue (2));
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aData[0] = OpenGl_Vec2 (-anOffsetX, -aCoef * anOffsetY);
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aData[1] = OpenGl_Vec2 (0.0f, 0.0f);
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aData = reinterpret_cast<OpenGl_Vec2* >(myAttribs->changeValue (3));
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aData[0] = OpenGl_Vec2 (-anOffsetX, aCoef * anOffsetY);
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aData[1] = OpenGl_Vec2 (0.0f, aCoef * aTexRangeY);
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return Standard_True;
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}
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// =======================================================================
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// method : createCubeMapArray
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// purpose :
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// =======================================================================
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Standard_Boolean OpenGl_BackgroundArray::createCubeMapArray() const
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{
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const Graphic3d_Attribute aCubeMapAttribInfo[] =
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{
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{ Graphic3d_TOA_POS, Graphic3d_TOD_VEC3 }
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};
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if (myAttribs.IsNull())
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{
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Handle(NCollection_AlignedAllocator) anAlloc = new NCollection_AlignedAllocator (16);
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myAttribs = new Graphic3d_Buffer (anAlloc);
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myIndices = new Graphic3d_IndexBuffer (anAlloc);
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}
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if (!myAttribs->Init (8, aCubeMapAttribInfo, 1)
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|| !myIndices->Init<unsigned short> (14))
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{
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return Standard_False;
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}
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{
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OpenGl_Vec3* aData = reinterpret_cast<OpenGl_Vec3*>(myAttribs->changeValue(0));
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aData[0].SetValues (-1.0, -1.0, 1.0);
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aData[1].SetValues ( 1.0, -1.0, 1.0);
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aData[2].SetValues (-1.0, 1.0, 1.0);
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aData[3].SetValues ( 1.0, 1.0, 1.0);
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aData[4].SetValues (-1.0, -1.0, -1.0);
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aData[5].SetValues ( 1.0, -1.0, -1.0);
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aData[6].SetValues (-1.0, 1.0, -1.0);
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aData[7].SetValues ( 1.0, 1.0, -1.0);
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}
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{
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const unsigned short THE_BOX_TRISTRIP[14] = { 0, 1, 2, 3, 7, 1, 5, 4, 7, 6, 2, 4, 0, 1 };
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for (unsigned int aVertIter = 0; aVertIter < 14; ++aVertIter)
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{
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myIndices->SetIndex (aVertIter, THE_BOX_TRISTRIP[aVertIter]);
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}
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}
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return Standard_True;
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}
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// =======================================================================
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// method : Render
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// purpose :
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// =======================================================================
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void OpenGl_BackgroundArray::Render (const Handle(OpenGl_Workspace)& theWorkspace,
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Graphic3d_Camera::Projection theProjection) const
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{
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const Handle(OpenGl_Context)& aCtx = theWorkspace->GetGlContext();
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Standard_Integer aViewSizeX = aCtx->Viewport()[2];
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Standard_Integer aViewSizeY = aCtx->Viewport()[3];
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Graphic3d_Vec2i aTileOffset, aTileSize;
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if (theWorkspace->View()->Camera()->Tile().IsValid())
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{
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aViewSizeX = theWorkspace->View()->Camera()->Tile().TotalSize.x();
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aViewSizeY = theWorkspace->View()->Camera()->Tile().TotalSize.y();
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aTileOffset = theWorkspace->View()->Camera()->Tile().OffsetLowerLeft();
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aTileSize = theWorkspace->View()->Camera()->Tile().TileSize;
|
|
}
|
|
if (myToUpdate
|
|
|| myViewWidth != aViewSizeX
|
|
|| myViewHeight != aViewSizeY
|
|
|| myAttribs.IsNull()
|
|
|| myVboAttribs.IsNull())
|
|
{
|
|
myViewWidth = aViewSizeX;
|
|
myViewHeight = aViewSizeY;
|
|
init (theWorkspace);
|
|
}
|
|
|
|
OpenGl_Mat4 aProjection = aCtx->ProjectionState.Current();
|
|
OpenGl_Mat4 aWorldView = aCtx->WorldViewState.Current();
|
|
|
|
if (myType == Graphic3d_TOB_CUBEMAP)
|
|
{
|
|
Graphic3d_Camera aCamera (theWorkspace->View()->Camera());
|
|
aCamera.SetZRange (0.01, 1.0); // is needed to avoid perspective camera exception
|
|
|
|
// cancel translation
|
|
aCamera.MoveEyeTo (gp_Pnt (0.0, 0.0, 0.0));
|
|
|
|
// Handle projection matrix:
|
|
// - Cancel any head-to-eye translation for HMD display;
|
|
// - Ignore stereoscopic projection in case of non-HMD 3D display
|
|
// (ideally, we would need a stereoscopic cubemap image; adding a parallax makes no sense);
|
|
// - Force perspective projection when orthographic camera is active
|
|
// (orthographic projection makes no sense for cubemap).
|
|
const bool isCustomProj = aCamera.IsCustomStereoFrustum()
|
|
|| aCamera.IsCustomStereoProjection();
|
|
aCamera.SetProjectionType (theProjection == Graphic3d_Camera::Projection_Orthographic || !isCustomProj
|
|
? Graphic3d_Camera::Projection_Perspective
|
|
: theProjection);
|
|
|
|
aProjection = aCamera.ProjectionMatrixF();
|
|
aWorldView = aCamera.OrientationMatrixF();
|
|
if (isCustomProj)
|
|
{
|
|
// get projection matrix without pre-multiplied stereoscopic head-to-eye translation
|
|
if (theProjection == Graphic3d_Camera::Projection_MonoLeftEye)
|
|
{
|
|
Graphic3d_Mat4 aMatProjL, aMatHeadToEyeL, aMatProjR, aMatHeadToEyeR;
|
|
aCamera.StereoProjectionF (aMatProjL, aMatHeadToEyeL, aMatProjR, aMatHeadToEyeR);
|
|
aProjection = aMatProjL;
|
|
}
|
|
else if (theProjection == Graphic3d_Camera::Projection_MonoRightEye)
|
|
{
|
|
Graphic3d_Mat4 aMatProjL, aMatHeadToEyeL, aMatProjR, aMatHeadToEyeR;
|
|
aCamera.StereoProjectionF (aMatProjL, aMatHeadToEyeL, aMatProjR, aMatHeadToEyeR);
|
|
aProjection = aMatProjR;
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
aProjection.InitIdentity();
|
|
aWorldView.InitIdentity();
|
|
if (theWorkspace->View()->Camera()->Tile().IsValid())
|
|
{
|
|
aWorldView.SetDiagonal (OpenGl_Vec4 (2.0f / aTileSize.x(), 2.0f / aTileSize.y(), 1.0f, 1.0f));
|
|
if (myType == Graphic3d_TOB_GRADIENT)
|
|
{
|
|
aWorldView.SetColumn (3, OpenGl_Vec4 (-1.0f - 2.0f * aTileOffset.x() / aTileSize.x(),
|
|
-1.0f - 2.0f * aTileOffset.y() / aTileSize.y(), 0.0f, 1.0f));
|
|
}
|
|
else
|
|
{
|
|
aWorldView.SetColumn (3, OpenGl_Vec4 (-1.0f + (float) aViewSizeX / aTileSize.x() - 2.0f * aTileOffset.x() / aTileSize.x(),
|
|
-1.0f + (float) aViewSizeY / aTileSize.y() - 2.0f * aTileOffset.y() / aTileSize.y(), 0.0f, 1.0f));
|
|
}
|
|
}
|
|
else
|
|
{
|
|
aWorldView.SetDiagonal (OpenGl_Vec4 (2.0f / myViewWidth, 2.0f / myViewHeight, 1.0f, 1.0f));
|
|
if (myType == Graphic3d_TOB_GRADIENT)
|
|
{
|
|
aWorldView.SetColumn (3, OpenGl_Vec4 (-1.0f, -1.0f, 0.0f, 1.0f));
|
|
}
|
|
}
|
|
}
|
|
|
|
aCtx->ProjectionState.Push();
|
|
aCtx->WorldViewState.Push();
|
|
aCtx->ProjectionState.SetCurrent (aProjection);
|
|
aCtx->WorldViewState.SetCurrent (aWorldView);
|
|
aCtx->ApplyProjectionMatrix();
|
|
aCtx->ApplyModelViewMatrix();
|
|
|
|
OpenGl_PrimitiveArray::Render (theWorkspace);
|
|
|
|
aCtx->ProjectionState.Pop();
|
|
aCtx->WorldViewState.Pop();
|
|
aCtx->ApplyProjectionMatrix();
|
|
}
|