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DrawMesh.cc
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49 
50 #include <ACG/GL/acg_glew.hh>
51 #include "DrawMesh.hh"
52 
53 namespace ACG {
54 
55 DrawMeshBase::DrawMeshBase() :
56  vbo_(0), ibo_(0),
57  numTris_(0), numVerts_(0),
58  meshComp_(0),
59  lineIBO_(0),
60  indexType_(0),
61  pickVertexIBO_(0) {
62 
63  vertexDecl_ = new VertexDeclaration;
64  vertexDeclEdgeCol_ = new VertexDeclaration;
65  vertexDeclHalfedgeCol_ = new VertexDeclaration;
66  vertexDeclHalfedgePos_ = new VertexDeclaration;
67 }
68 
69 DrawMeshBase::~DrawMeshBase() {
70  if (vbo_) glDeleteBuffersARB(1, &vbo_);
71  if (ibo_) glDeleteBuffersARB(1, &ibo_);
72  if (lineIBO_) glDeleteBuffersARB(1, &lineIBO_);
73 
74  delete vertexDecl_;
75  delete vertexDeclEdgeCol_;
78 
79  if (pickVertexIBO_) glDeleteBuffersARB(1, &pickVertexIBO_);
80 }
81 
82 void DrawMeshBase::deleteIbo() {
83  if (ibo_)
84  glDeleteBuffers(1, &ibo_);
85  ibo_ = 0;
86 }
87 
88 void DrawMeshBase::bindVbo() {
89  if (!vbo_)
90  glGenBuffersARB(1, &vbo_);
91 
92  ACG::GLState::bindBufferARB(GL_ARRAY_BUFFER_ARB, vbo_);
93 }
94 
95 void DrawMeshBase::bindIbo() {
96  if (!ibo_)
97  glGenBuffersARB(1, &ibo_);
98 
99  ACG::GLState::bindBufferARB(GL_ELEMENT_ARRAY_BUFFER_ARB, ibo_);
100 }
101 
102 void DrawMeshBase::bindLineIbo() {
103  if (!lineIBO_)
104  glGenBuffersARB(1, &lineIBO_);
105 
106  ACG::GLState::bindBufferARB(GL_ELEMENT_ARRAY_BUFFER, lineIBO_);
107 }
108 
109 void DrawMeshBase::bindPickVertexIbo() {
110  if (!pickVertexIBO_)
111  glGenBuffersARB(1, &pickVertexIBO_);
112 
113  glBindBufferARB(GL_ELEMENT_ARRAY_BUFFER_ARB, pickVertexIBO_);
114 }
115 
116 void DrawMeshBase::createIndexBuffer() {
117  glBufferDataARB(GL_ELEMENT_ARRAY_BUFFER_ARB,
118  numTris_ * 3 * sizeof(unsigned int),
119  meshComp_->getIndexBuffer(), GL_STATIC_DRAW_ARB);
120 }
121 
122 void DrawMeshBase::fillLineBuffer(size_t n_edges, void *data) {
123  // 2 or 4 byte indices:
124  if (indexType_ == GL_UNSIGNED_SHORT)
125  glBufferDataARB(GL_ELEMENT_ARRAY_BUFFER_ARB,
126  n_edges * 2 * sizeof(unsigned short),
127  data, GL_STATIC_DRAW_ARB);
128  else
129  glBufferDataARB(GL_ELEMENT_ARRAY_BUFFER_ARB,
130  n_edges * 2 * sizeof(unsigned int),
131  data, GL_STATIC_DRAW_ARB);
132 }
133 
134 void DrawMeshBase::fillVertexBuffer() {
135  if (!vertices_.empty())
136  glBufferDataARB(GL_ARRAY_BUFFER_ARB, numVerts_ * vertexDecl_->getVertexStride(), &vertices_[0], GL_STATIC_DRAW_ARB);
137 }
138 
139 void DrawMeshBase::fillInvVertexMap(size_t n_vertices, void *data) {
140  glBufferDataARB(GL_ELEMENT_ARRAY_BUFFER_ARB, sizeof(int) * n_vertices, data, GL_STATIC_DRAW);
141 }
142 
143 } /* namespace ACG */
GLuint pickVertexIBO_
map from openmesh vertex to vbo vertex id
Definition: DrawMesh.hh:157
Namespace providing different geometric functions concerning angles.
Definition: DBSCANT.cc:51
GLenum indexType_
support for 2 and 4 byte unsigned integers
Definition: DrawMesh.hh:137
VertexDeclaration * vertexDeclEdgeCol_
vertex buffer layout declaration with per edge colors
Definition: DrawMesh.hh:148
VertexDeclaration * vertexDeclHalfedgePos_
vertex buffer layout declaration with halfedge positions only
Definition: DrawMesh.hh:154
GLuint lineIBO_
index buffer used in Wireframe / Hiddenline mode
Definition: DrawMesh.hh:134
unsigned int getVertexStride(unsigned int i=0) const
VertexDeclaration * vertexDecl_
vertex buffer layout declaration with per vertex colors
Definition: DrawMesh.hh:145
VertexDeclaration * vertexDeclHalfedgeCol_
vertex buffer layout declaration with per halfedge colors
Definition: DrawMesh.hh:151
static void bindBufferARB(GLenum _target, GLuint _buffer)
same function as bindBuffer
Definition: GLState.hh:576
std::vector< char > vertices_
Definition: DrawMesh.hh:142
const int * getIndexBuffer() const