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/*=========================================================================
Program: Visualization Toolkit
Module: vtkOpenGLCoincidentTopologyResolutionPainter.cxx
Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
All rights reserved.
See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notice for more information.
=========================================================================*/
#include "vtkOpenGLCoincidentTopologyResolutionPainter.h"
#include "vtkActor.h"
#include "vtkCamera.h"
#include "vtkMapper.h" // for VTK_RESOLVE_*
#include "vtkObjectFactory.h"
#include "vtkProperty.h"
#include "vtkRenderer.h"
#include "vtkOpenGL.h"
#include "vtkOpenGLError.h"
vtkStandardNewMacro(vtkOpenGLCoincidentTopologyResolutionPainter);
//-----------------------------------------------------------------------------
vtkOpenGLCoincidentTopologyResolutionPainter::
vtkOpenGLCoincidentTopologyResolutionPainter()
{
}
//-----------------------------------------------------------------------------
vtkOpenGLCoincidentTopologyResolutionPainter::
~vtkOpenGLCoincidentTopologyResolutionPainter()
{
}
//-----------------------------------------------------------------------------
void vtkOpenGLCoincidentTopologyResolutionPainter::RenderInternal(
vtkRenderer *renderer, vtkActor *actor, unsigned long typeflags,
bool forceCompileOnly)
{
vtkProperty* prop = actor->GetProperty();
bool draw_surface_with_edges =
(prop->GetEdgeVisibility() && prop->GetRepresentation() == VTK_SURFACE);
int rct = draw_surface_with_edges? VTK_RESOLVE_OFF: this->ResolveCoincidentTopology;
switch (rct)
{
case VTK_RESOLVE_OFF:
this->Superclass::RenderInternal(renderer, actor,
typeflags, forceCompileOnly);
break;
case VTK_RESOLVE_POLYGON_OFFSET:
this->RenderPolygonOffset(renderer, actor, typeflags, forceCompileOnly);
break;
case VTK_RESOLVE_SHIFT_ZBUFFER:
this->RenderShiftZBuffer(renderer, actor, typeflags, forceCompileOnly);
break;
}
}
//-----------------------------------------------------------------------------
void vtkOpenGLCoincidentTopologyResolutionPainter::RenderPolygonOffset(
vtkRenderer *renderer, vtkActor *actor, unsigned long typeflags,
bool forceCompileOnly)
{
#ifdef GL_VERSION_1_1
vtkOpenGLClearErrorMacro();
if (this->OffsetFaces)
{
glEnable(GL_POLYGON_OFFSET_FILL);
}
else
{
glEnable(GL_POLYGON_OFFSET_LINE);
glEnable(GL_POLYGON_OFFSET_POINT);
}
glPolygonOffset(this->PolygonOffsetFactor, this->PolygonOffsetUnits);
#endif
this->Superclass::RenderInternal(renderer, actor, typeflags,
forceCompileOnly);
#ifdef GL_VERSION_1_1
if (this->OffsetFaces)
{
glDisable(GL_POLYGON_OFFSET_FILL);
}
else
{
glDisable(GL_POLYGON_OFFSET_LINE);
glDisable(GL_POLYGON_OFFSET_POINT);
}
vtkOpenGLCheckErrorMacro("failed after RenderPolygonOffset");
#endif
}
//-----------------------------------------------------------------------------
void vtkOpenGLCoincidentTopologyResolutionPainter::RenderShiftZBuffer(
vtkRenderer *renderer, vtkActor *actor, unsigned long typeflags,
bool forceCompileOnly)
{
vtkOpenGLClearErrorMacro();
// Get the flags for each type of primitive. Polygons can be drawn
// as vertices or lines rather than filled, so check the property and
// OpenGL flags to try to determine which one we are doing.
unsigned long vertFlags = typeflags & vtkPainter::VERTS;
unsigned long lineFlags = typeflags & vtkPainter::LINES;
unsigned long polyFlags = 0;
int actorRep = actor->GetProperty()->GetRepresentation();
GLint oglPolyMode[2];
glGetIntegerv(GL_POLYGON_MODE, oglPolyMode);
if ((actorRep == VTK_POINTS) || (oglPolyMode[0] == GL_POINT))
{
vertFlags |= typeflags & (vtkPainter::POLYS | vtkPainter::STRIPS);
}
else if ((actorRep == VTK_WIREFRAME) || (oglPolyMode[0] == GL_LINE))
{
lineFlags |= typeflags & (vtkPainter::POLYS | vtkPainter::STRIPS);
}
else
{
polyFlags |= typeflags & (vtkPainter::POLYS | vtkPainter::STRIPS);
}
GLint stackDepth, maxStackDepth;
glGetIntegerv(GL_PROJECTION_STACK_DEPTH, &stackDepth);
glGetIntegerv(GL_MAX_PROJECTION_STACK_DEPTH, &maxStackDepth);
// We need to push the projection matrix on the stack. Unfortunately, the
// projection matrix stack can be small, so we check to make sure that we
// can do it.
if (stackDepth < maxStackDepth)
{
double range[2];
renderer->GetActiveCamera()->GetClippingRange(range);
if (vertFlags)
{
glMatrixMode(GL_PROJECTION);
glPushMatrix();
glTranslated(0.0, 0.0, 2.0*this->ZShift*(range[1]-range[0]));
vtkOpenGLCheckErrorMacro("failed after setup");
this->Superclass::RenderInternal(renderer, actor, vertFlags,
forceCompileOnly);
glMatrixMode(GL_PROJECTION);
glPopMatrix();
}
if (lineFlags)
{
glMatrixMode(GL_PROJECTION);
glPushMatrix();
glTranslated(0.0, 0.0, this->ZShift*(range[1]-range[0]));
vtkOpenGLCheckErrorMacro("failed after setup");
this->Superclass::RenderInternal(renderer, actor, lineFlags,
forceCompileOnly);
glMatrixMode(GL_PROJECTION);
glPopMatrix();
}
if (polyFlags)
{
this->Superclass::RenderInternal(renderer, actor, polyFlags,
forceCompileOnly);
}
}
else
{
this->Superclass::RenderInternal(renderer, actor, typeflags,
forceCompileOnly);
}
vtkOpenGLCheckErrorMacro("failed after RenderShiftZBuffer");
}
//-----------------------------------------------------------------------------
void vtkOpenGLCoincidentTopologyResolutionPainter::PrintSelf(
ostream& os, vtkIndent indent)
{
this->Superclass::PrintSelf(os, indent);
}
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