Developer Documentation

DrawMesh.cc
1 /*===========================================================================*\
2 * *
3 * OpenFlipper *
4 * Copyright (c) 2001-2015, RWTH-Aachen University *
5 * Department of Computer Graphics and Multimedia *
6 * All rights reserved. *
7 * www.openflipper.org *
8 * *
9 *---------------------------------------------------------------------------*
10 * This file is part of OpenFlipper. *
11 *---------------------------------------------------------------------------*
12 * *
13 * Redistribution and use in source and binary forms, with or without *
14 * modification, are permitted provided that the following conditions *
15 * are met: *
16 * *
17 * 1. Redistributions of source code must retain the above copyright notice, *
18 * this list of conditions and the following disclaimer. *
19 * *
20 * 2. Redistributions in binary form must reproduce the above copyright *
21 * notice, this list of conditions and the following disclaimer in the *
22 * documentation and/or other materials provided with the distribution. *
23 * *
24 * 3. Neither the name of the copyright holder nor the names of its *
25 * contributors may be used to endorse or promote products derived from *
26 * this software without specific prior written permission. *
27 * *
28 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS *
29 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED *
30 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A *
31 * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER *
32 * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, *
33 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, *
34 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR *
35 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF *
36 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING *
37 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS *
38 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. *
39 * *
40 \*===========================================================================*/
41
42
43
44 #include <ACG/GL/acg_glew.hh>
45 #include "DrawMesh.hh"
46
47 namespace ACG {
48
49 DrawMeshBase::DrawMeshBase() :
50 vbo_(0), ibo_(0),
51 numTris_(0), numVerts_(0),
52 meshComp_(0),
53 lineIBO_(0),
54 heVBO_(0),
55 indexType_(0),
56 pickVertexIBO_(0) {
57
58 vertexDecl_ = new VertexDeclaration;
59 vertexDeclEdgeCol_ = new VertexDeclaration;
60 vertexDeclHalfedgeCol_ = new VertexDeclaration;
61 vertexDeclHalfedgePos_ = new VertexDeclaration;
62 }
63
64 DrawMeshBase::~DrawMeshBase() {
65 if (vbo_) glDeleteBuffers(1, &vbo_);
66 if (ibo_) glDeleteBuffers(1, &ibo_);
67 if (lineIBO_) glDeleteBuffers(1, &lineIBO_);
68 if (heVBO_) glDeleteBuffers(1, &heVBO_);
69
70 delete vertexDecl_;
71 delete vertexDeclEdgeCol_;
72 delete vertexDeclHalfedgeCol_;
73 delete vertexDeclHalfedgePos_;
74
75 if (pickVertexIBO_) glDeleteBuffers(1, &pickVertexIBO_);
76 }
77
78 void DrawMeshBase::deleteIbo() {
79 if (ibo_)
80 glDeleteBuffers(1, &ibo_);
81 ibo_ = 0;
82 }
83
84 void DrawMeshBase::bindVbo() {
85 if (!vbo_)
86 glGenBuffers(1, &vbo_);
87
88 ACG::GLState::bindBufferARB(GL_ARRAY_BUFFER_ARB, vbo_);
89 }
90
91 void DrawMeshBase::bindIbo() {
92 if (!ibo_)
93 glGenBuffers(1, &ibo_);
94
95 ACG::GLState::bindBufferARB(GL_ELEMENT_ARRAY_BUFFER_ARB, ibo_);
96 }
97
98 void DrawMeshBase::bindLineIbo() {
99 if (!lineIBO_)
100 glGenBuffers(1, &lineIBO_);
101
102 ACG::GLState::bindBufferARB(GL_ELEMENT_ARRAY_BUFFER, lineIBO_);
103 }
104
105 void DrawMeshBase::bindHEVbo() {
106 glGetIntegerv(GL_ARRAY_BUFFER_BINDING,&prevVBO_);
107 if (!heVBO_)
108 glGenBuffers(1, &heVBO_);
109
110 ACG::GLState::bindBufferARB(GL_ARRAY_BUFFER_ARB, heVBO_);
111 }
112
113 void DrawMeshBase::unbindHEVbo() {
114 ACG::GLState::bindBufferARB(GL_ARRAY_BUFFER_ARB, prevVBO_);
115 }
116
117 void DrawMeshBase::bindPickVertexIbo() {
118 if (!pickVertexIBO_)
119 glGenBuffers(1, &pickVertexIBO_);
120
121 glBindBuffer(GL_ELEMENT_ARRAY_BUFFER_ARB, pickVertexIBO_);
122 }
123
124 void DrawMeshBase::createIndexBuffer() {
125 glBufferData(GL_ELEMENT_ARRAY_BUFFER_ARB,
126 numTris_ * 3 * sizeof(unsigned int),
127 meshComp_->getIndexBuffer(), GL_STATIC_DRAW_ARB);
128 }
129
130 void DrawMeshBase::fillLineBuffer(size_t n_edges, void *data) {
131 // 2 or 4 byte indices:
132 if (indexType_ == GL_UNSIGNED_SHORT)
133 glBufferData(GL_ELEMENT_ARRAY_BUFFER_ARB,
134 n_edges * 2 * sizeof(unsigned short),
135 data, GL_STATIC_DRAW_ARB);
136 else
137 glBufferData(GL_ELEMENT_ARRAY_BUFFER_ARB,
138 n_edges * 2 * sizeof(unsigned int),
139 data, GL_STATIC_DRAW_ARB);
140 }
141
142 void DrawMeshBase::fillHEVBO(size_t numberOfElements_, size_t sizeOfElements_, void* data_)
143 {
144 bindHEVbo();
145 glBufferData(GL_ARRAY_BUFFER,numberOfElements_ * sizeOfElements_, data_, GL_STATIC_DRAW);
146 unbindHEVbo();
147 }
148
149 void DrawMeshBase::fillVertexBuffer() {
150 if (!vertices_.empty())
151 glBufferData(GL_ARRAY_BUFFER_ARB, numVerts_ * vertexDecl_->getVertexStride(), &vertices_[0], GL_STATIC_DRAW_ARB);
152 }
153
154 void DrawMeshBase::fillInvVertexMap(size_t n_vertices, void *data) {
155 glBufferData(GL_ELEMENT_ARRAY_BUFFER_ARB, sizeof(int) * n_vertices, data, GL_STATIC_DRAW);
156 }
157
158 } /* namespace ACG */
ACG
Namespace providing different geometric functions concerning angles.
Definition: BaseObjectData.hh:68
ACG::GLState::bindBufferARB
static void bindBufferARB(GLenum _target, GLuint _buffer)
same function as bindBuffer
Definition: GLState.hh:573