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// File: NIS_TriangulatedDrawer.cxx
// Created: 19.07.07 12:09
// Author: Alexander GRIGORIEV
// Copyright: Open Cascade 2007
#include <NIS_TriangulatedDrawer.hxx>
#include <NIS_InteractiveObject.hxx>
#include <NIS_Triangulated.hxx>
#ifdef _DEBUG
#include <Standard_ProgramError.hxx>
#endif
#ifdef WNT
#include <windows.h>
#endif
#include <GL/gl.h>
// Comment this line if you see no hilighting of triangulations due to negative
// polygon offsets. Disabling this macro means that all offsets will be created
// in the positive scale.
// But before changing this macro please play with your OpenGL video card
// settings in the direction of performance improvement. Particularly, I had a
// good result after checking "Enable write combining" option in NVIDIA 6600.
#define NEGATIVE_POFFSET
IMPLEMENT_STANDARD_HANDLE (NIS_TriangulatedDrawer, NIS_Drawer)
IMPLEMENT_STANDARD_RTTIEXT (NIS_TriangulatedDrawer, NIS_Drawer)
//=======================================================================
//function : NIS_TriangulatedDrawer()
//purpose : Constructor
//=======================================================================
NIS_TriangulatedDrawer::NIS_TriangulatedDrawer
(const Quantity_Color theNormal,
const Quantity_Color theHilight,
const Quantity_Color theDynHilight)
: myPolygonAsLineLoop (Standard_False),
myLineWidth (1.f),
myIsDrawPolygons (Standard_False),
myPolygonType (NIS_Triangulated::Polygon_Default)
{
myColor[Draw_Normal] = theNormal;
myColor[Draw_Top] = theNormal;
myColor[Draw_Transparent] = theNormal;
myColor[Draw_Hilighted] = theHilight;
myColor[Draw_DynHilighted] = theDynHilight;
}
//=======================================================================
//function : Assign
//purpose :
//=======================================================================
void NIS_TriangulatedDrawer::Assign (const Handle_NIS_Drawer& theOther)
{
if (theOther.IsNull() == Standard_False) {
NIS_Drawer::Assign (theOther);
const Handle(NIS_TriangulatedDrawer)& anOther =
static_cast <const Handle(NIS_TriangulatedDrawer)&> (theOther);
myColor[Draw_Normal] = anOther->myColor[Draw_Normal];
myColor[Draw_Top] = anOther->myColor[Draw_Top];
myColor[Draw_Transparent] = anOther->myColor[Draw_Transparent];
myColor[Draw_Hilighted] = anOther->myColor[Draw_Hilighted];
myColor[Draw_DynHilighted] = anOther->myColor[Draw_DynHilighted];
myLineWidth = anOther->myLineWidth;
myIsDrawPolygons = anOther->myIsDrawPolygons;
myPolygonType = anOther->myPolygonType;
}
}
static const Standard_Integer nObjPerDrawer = 64;
//=======================================================================
//function : IsEqual
//purpose : Comparison of two Drawers (for Map impementation)
//=======================================================================
Standard_Boolean NIS_TriangulatedDrawer::IsEqual
(const Handle_NIS_Drawer& theOther)const
{
static const Standard_Real anEpsilon2 (1e-7);
Standard_Boolean aResult (Standard_False);
const Handle(NIS_TriangulatedDrawer) anOther =
Handle(NIS_TriangulatedDrawer)::DownCast (theOther);
if (NIS_Drawer::IsEqual(theOther))
aResult = (anOther->myColor[Draw_Normal]
.SquareDistance (myColor[Draw_Normal]) < anEpsilon2 &&
anOther->myColor[Draw_Hilighted]
.SquareDistance (myColor[Draw_Hilighted]) < anEpsilon2 &&
anOther->myColor[Draw_DynHilighted]
.SquareDistance (myColor[Draw_DynHilighted]) < anEpsilon2 &&
(anOther->myLineWidth - myLineWidth) *
(anOther->myLineWidth - myLineWidth) < 0.01 &&
anOther->myIsDrawPolygons == myIsDrawPolygons &&
anOther->myPolygonType == myPolygonType);
return aResult;
}
//=======================================================================
//function : BeforeDraw
//purpose :
//=======================================================================
void NIS_TriangulatedDrawer::BeforeDraw (const DrawType theType,
const NIS_DrawList&)
{
Quantity_Parameter aValue[4];
Quantity_TypeOfColor bidTC (Quantity_TOC_RGB);
GLfloat aLineWidth (myLineWidth);
Standard_Integer anOffsetHilighted = 0;
switch (theType) {
case Draw_DynHilighted:
aLineWidth = myLineWidth + 1.f;
#ifdef NEGATIVE_POFFSET
anOffsetHilighted = -11;
#endif
case Draw_Hilighted:
switch (myPolygonType) {
default:
case NIS_Triangulated::Polygon_Default:
if (myIsDrawPolygons) {
case NIS_Triangulated::Polygon_Line:
glEnable(GL_POLYGON_OFFSET_LINE);
} else {
case NIS_Triangulated::Polygon_Fill:
glEnable(GL_POLYGON_OFFSET_FILL);
}
}
if (theType == Draw_Hilighted)
{
#ifdef NEGATIVE_POFFSET
anOffsetHilighted = -10;
#else
anOffsetHilighted = 1;
#endif
}
myColor[theType].Values (aValue[0], aValue[1], aValue[2], bidTC);
glColor3d (aValue[0], aValue[1], aValue[2]);
break;
case Draw_Normal:
case Draw_Top:
case Draw_Transparent:
#ifndef NEGATIVE_POFFSET
anOffsetHilighted = 11;
#endif
myColor[theType].Values (aValue[0], aValue[1], aValue[2], bidTC);
aValue[3] = 1. - myTransparency;
if (myTransparency > 0.01) {
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
}
glColor4d (aValue[0], aValue[1], aValue[2], aValue[3]);
break;
default:
return;
}
if (anOffsetHilighted)
glPolygonOffset(1.f, static_cast<GLfloat>(anOffsetHilighted));
// myColor[theType].Values (aValue[0], aValue[1], aValue[2], bidTC);
// glColor3d (aValue[0], aValue[1], aValue[2]);
switch (myPolygonType) {
default:
case NIS_Triangulated::Polygon_Default:
if (myIsDrawPolygons) {
case NIS_Triangulated::Polygon_Line:
glPolygonMode (GL_FRONT_AND_BACK, GL_LINE);
} else {
case NIS_Triangulated::Polygon_Fill:
glPolygonMode (GL_FRONT_AND_BACK, GL_FILL);
}
}
glEnableClientState (GL_VERTEX_ARRAY);
glLineWidth (aLineWidth);
glShadeModel(GL_FLAT);
glDisable(GL_LIGHTING);
}
//=======================================================================
//function : AfterDraw
//purpose :
//=======================================================================
void NIS_TriangulatedDrawer::AfterDraw (const DrawType theType,
const NIS_DrawList&)
{
switch (theType) {
case Draw_Hilighted:
case Draw_DynHilighted:
switch (myPolygonType) {
default:
case NIS_Triangulated::Polygon_Default:
if (myIsDrawPolygons) {
case NIS_Triangulated::Polygon_Line:
glDisable(GL_POLYGON_OFFSET_LINE);
} else {
case NIS_Triangulated::Polygon_Fill:
glDisable(GL_POLYGON_OFFSET_FILL);
}
}
case Draw_Normal:
case Draw_Top:
case Draw_Transparent:
glDisableClientState(GL_VERTEX_ARRAY);
if (myTransparency > 0.01)
glDisable(GL_BLEND);
default:;
}
if (myPolygonType == NIS_Triangulated::Polygon_Line ||
(myPolygonType == NIS_Triangulated::Polygon_Default && myIsDrawPolygons))
glPolygonMode (GL_FRONT_AND_BACK, GL_FILL);
}
//=======================================================================
//function : Draw
//purpose :
//=======================================================================
void NIS_TriangulatedDrawer::Draw (const Handle_NIS_InteractiveObject& theObj,
const DrawType /*theType*/,
const NIS_DrawList&)
{
// Assertion for the type of the drawn object
#ifdef _DEBUG
static const Handle(Standard_Type) ThisType = STANDARD_TYPE(NIS_Triangulated);
if (theObj->IsKind(ThisType) == Standard_False)
Standard_ProgramError::Raise ("NIS_Triangulated::Draw: "
"irrelevant object type");
#endif
const NIS_Triangulated * pObject =
static_cast <const NIS_Triangulated *> (theObj.operator->());
glVertexPointer (pObject->myNodeCoord, GL_FLOAT, 0, pObject->Node(0));
GLenum aType = GL_UNSIGNED_INT;
if (pObject->myIndexType == 0)
aType = GL_UNSIGNED_BYTE;
else if (pObject->myIndexType == 1)
aType = GL_UNSIGNED_SHORT;
if (myIsDrawPolygons == Standard_False) {
if (pObject->IsTriangulation()) {
glDrawElements (GL_TRIANGLES, pObject->NTriangles()*3,
aType, pObject->mypTriangles);
}
} else {
if (pObject->IsPolygons()) {
GLenum aMode = GL_POLYGON;
if (myPolygonAsLineLoop &&
(myPolygonType == NIS_Triangulated::Polygon_Line ||
(myPolygonType == NIS_Triangulated::Polygon_Default &&
myIsDrawPolygons)))
aMode = GL_LINE_LOOP;
const Standard_Integer nPoly = pObject->NPolygons();
for (Standard_Integer i = 0; i < nPoly; i++) {
const Standard_Integer nSize = pObject->NPolygonNodes(i);
void* anArray;
if (pObject->myIndexType == 0)
anArray = reinterpret_cast<unsigned char *>(pObject->mypPolygons[i]) + 1;
else if (pObject->myIndexType == 1)
anArray = reinterpret_cast<unsigned short *>(pObject->mypPolygons[i]) + 1;
else
anArray = pObject->mypPolygons[i] + 1;
glDrawElements (aMode, nSize, aType, anArray);
}
}
}
if (pObject->IsSegments())
glDrawElements (GL_LINES, pObject->NLineNodes(),
aType, pObject->mypLines);
else {
Standard_Boolean isLoop;
if (pObject->IsLine(isLoop)) {
if (isLoop) {
// glPolygonMode (GL_FRONT_AND_BACK, GL_LINE);
glDrawElements (GL_LINE_LOOP, pObject->NLineNodes(),
aType, pObject->mypLines);
// glPolygonMode (GL_FRONT_AND_BACK, GL_FILL);
} else {
glDrawElements (GL_LINE_STRIP, pObject->NLineNodes(),
aType, pObject->mypLines);
}
}
}
}
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