基于OpenGL的实用源代码

//******************************************** // Mesh3d.cpp //******************************************** // class CMesh3d //******************************************** // alliez@usc.edu // Created : 15/01/98 // Modified : 15/01/98 //******************************************** #include "stdafx.h" #include <math.h> #include "Base3d.h" #include "Mesh3d.h" #include "ColorRamp.h" #include "AVLInd.h" // Gaspard Breton's stuff #include "WmfTools.h" ////////////////////////////////////////////// // CONSTRUCTORS ////////////////////////////////////////////// //******************************************** // Constructor //******************************************** CMesh3d::CMesh3d() { m_ListDone = 0; m_Modified = 1; m_NormalBinding = NORMAL_PER_FACE; m_ColorBinding = COLOR_PER_VERTEX; m_Name = _T("Mesh"); // Texture m_IndexTexture = -1; m_pTextureCoordinate = NULL; m_pTextureCoordinateIndex = NULL; m_Show = 1; } //******************************************** // Destructor //******************************************** CMesh3d::~CMesh3d() { Free(); } //******************************************** // Free //******************************************** void CMesh3d::Free() { //TRACE("Cleanup mesh %x\n",this); m_ArrayVertex.Free(); m_ArrayFace.Free(); if(m_pTextureCoordinate != NULL) delete [] m_pTextureCoordinate; if(m_pTextureCoordinateIndex != NULL) delete [] m_pTextureCoordinateIndex; } ////////////////////////////////////////////// // OPENGL ////////////////////////////////////////////// //******************************************** // BuildList //******************************************** int CMesh3d::glBuildList() { //TRACE(" Start building list ...\n"); // Check for valid mesh if(m_ArrayVertex.GetSize() == 0 || m_ArrayFace.GetSize() == 0) { TRACE("CMesh3d::BuildList : empty mesh\n"); return 0; } if(!m_Modified && m_ListDone) return 0; // Erase last list ::glDeleteLists(m_ListOpenGL,1); // Search for a new list m_ListOpenGL = ::glGenLists(1); if(m_ListOpenGL == 0) { TRACE("CMesh3d::BuildList : unable to build DrawList\n"); return 0; } // Start list ::glNewList(m_ListOpenGL,GL_COMPILE_AND_EXECUTE); glDrawDirect(); ::glEndList(); // List is done now m_ListDone = 1; m_Modified = 0; return 1; } //********************************* // glDrawDirect //********************************* int CMesh3d::glDrawDirect() { unsigned int NbVertex = (unsigned int)m_ArrayVertex.GetSize(); unsigned int NbFace = (unsigned int)m_ArrayFace.GetSize(); if(!NbVertex) return 0; if(!NbFace) return 0; CFace3d *pFace; CVector3d *pVector; CColor *pColorPrevious; ::glPushMatrix(); // Position / translation / scaling glTranslatef(m_Transform.GetTranslation()->x(), m_Transform.GetTranslation()->y(), m_Transform.GetTranslation()->z()); glScalef(m_Transform.GetScale()->x(), m_Transform.GetScale()->y(), m_Transform.GetScale()->z()); glRotatef(m_Transform.GetValueRotation(), m_Transform.GetRotation()->x(), m_Transform.GetRotation()->y(), m_Transform.GetRotation()->z()); // Init color pFace = m_ArrayFace[0]; pColorPrevious = pFace->GetColor(); ::glColor3ub(pFace->GetColor()->r(),pFace->GetColor()->g(),pFace->GetColor()->b()); // Triangles ::glBegin(GL_TRIANGLES); for(unsigned int i=0;i<NbFace;i++) { { pFace = m_ArrayFace[i]; ASSERT(pFace != NULL); // Normal (per face) if(m_NormalBinding == NORMAL_PER_FACE) { pVector = pFace->GetNormal(); ::glNormal3f(pVector->x(),pVector->y(),pVector->z()); } // Color (per face) if(m_ColorBinding == COLOR_PER_FACE && pColorPrevious != pFace->GetColor()) { ::glColor3ub(pFace->GetColor()->r(),pFace->GetColor()->g(),pFace->GetColor()->b()); pColorPrevious = pFace->GetColor(); } for(int j=0;j<3;j++) { // Normal if(m_NormalBinding == NORMAL_PER_VERTEX) { pVector = pFace->v(j)->GetNormal(); ::glNormal3f(pVector->x(),pVector->y(),pVector->z()); } // Color (per vertex) if(m_ColorBinding == COLOR_PER_VERTEX && pColorPrevious != pFace->v(j)->GetColor()) { ::glColor3ub(pFace->v(j)->GetColor()->r(),pFace->v(j)->GetColor()->g(),pFace->v(j)->GetColor()->b()); pColorPrevious = pFace->v(j)->GetColor(); } // Texture coordinate (if needed) if(m_IndexTexture != -1) { glTexCoord2f(m_pTextureCoordinate[2*m_pTextureCoordinateIndex[3*i+j]], m_pTextureCoordinate[2*m_pTextureCoordinateIndex[3*i+j]+1]); } // Vertex ::glVertex3f(pFace->v(j)->x(),pFace->v(j)->y(),pFace->v(j)->z()); } } } ::glEnd(); ::glPopMatrix(); return 1; } //******************************************** // Draw //******************************************** int CMesh3d::glDraw() { if(!m_Show) return 0; // Build list at first if(!m_ListDone || m_Modified) glBuildList(); // Search for a new list if(::glIsList(m_ListOpenGL)==GL_TRUE) { ::glCallList(m_ListOpenGL); return 1; } else { TRACE(" CMesh3d::Draw : unable to draw list %d\n",m_ListOpenGL); return 0; } } ////////////////////////////////////////////// // DATAS ////////////////////////////////////////////// //******************************************** // Copy //******************************************** void CMesh3d::Copy(CMesh3d *pMesh) { // Vertices int NbVertex = pMesh->NbVertex(); m_ArrayVertex.SetSize(NbVertex); for(int i=0;i<NbVertex;i++) m_ArrayVertex.SetAt(i,new CVertex3d(pMesh->GetVertex(i))); // Faces int NbFace = pMesh->NbFace(); m_ArrayFace.SetSize(NbFace); for(i=0;i<NbFace;i++) { CFace3d *pFace = pMesh->GetFace(i); m_ArrayFace.SetAt(i,new CFace3d( m_ArrayVertex[pMesh->IndexFrom(pFace->v1())], m_ArrayVertex[pMesh->IndexFrom(pFace->v2())], m_ArrayVertex[pMesh->IndexFrom(pFace->v3())])); } // Transform m_Transform.Copy(pMesh->GetTransform()); } //******************************************** // GetType //******************************************** int CMesh3d::GetType() { return TYPE_MESH3D; } //******************************************** // IsValid //******************************************** int CMesh3d::IsValid() { int NbFace = m_ArrayFace.GetSize(); for(int i=0;i<NbFace;i++) if(!m_ArrayFace[i]->IsValid()) return 0; return 1; } //******************************************** // DeleteVertex //******************************************** int CMesh3d::DeleteVertex(CVertex3d *pVertex) { int size = m_ArrayVertex.GetSize(); for(int i=0;i<size;i++) { CVertex3d *pV = m_ArrayVertex[i]; if(pV == pVertex) { m_ArrayVertex.RemoveAt(i); delete pVertex; return 1; } } return 0; } //******************************************** // DeleteVertex //******************************************** int CMesh3d::DeleteVertex(int index) { if(index < m_ArrayVertex.GetSize()) { CVertex3d *pVertex = (CVertex3d *)m_ArrayVertex[index]; m_ArrayVertex.RemoveAt(index); delete pVertex; return 1; } return 0; } //******************************************** // DeleteFace //******************************************** int CMesh3d::DeleteFaceNbNeighbors(int NbNeighbor) { TRACE("Delete faces which has %d neighbors...",NbNeighbor); int deleted = 0; for(int i=0;i<m_ArrayFace.GetSize();i++) { CFace3d *pFace = m_ArrayFace[i]; if(pFace->NbFaceNeighbor() == NbNeighbor) { m_ArrayFace.RemoveAt(i); delete pFace; i--; deleted++; } } TRACE("%d face(s) deleted\n",deleted); return deleted; } ////////////////////////////////////////////// // RANGE ///////////////////////////////