70 lines
1.4 KiB
C++
70 lines
1.4 KiB
C++
#include "mesh.h"
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#include "glassert.h"
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#define BUFFER_OFFSET(i) ((char *)NULL + (i))
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Mesh::~Mesh()
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{
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destroyGL();
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}
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void Mesh::addFace(int i1, int i2, int i3)
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{
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if(!locked)
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{
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indices.push_back(i1);
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indices.push_back(i2);
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indices.push_back(i3);
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}
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}
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void Mesh::initGL()
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{
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if(locked)
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destroyGL();
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// create VAO
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glAssert(glGenVertexArrays(1, &vao));
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glAssert(glBindVertexArray(vao));
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// create VBOs
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glAssert(glGenBuffers(NB_BUFFERS, vbo));
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int size = getSizeofVertexType();
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// init vertex vbo
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glAssert(glBindBuffer(GL_ARRAY_BUFFER, vbo[VERTEX_BUFFER]));
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glAssert(glBufferData(GL_ARRAY_BUFFER, getNbVertices() * size, getVertexData(), GL_STATIC_DRAW));
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setAttribPointer();
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// init indices vbo
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glAssert(glBindBuffer(GL_ARRAY_BUFFER, vbo[INDICES_BUFFER]));
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glAssert(glBufferData(GL_ARRAY_BUFFER, indices.size() * sizeof(GLuint), indices.data(), GL_STATIC_DRAW));
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// unbind vao
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glAssert(glBindVertexArray(0));
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locked = true;
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}
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void Mesh::destroyGL()
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{
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if(locked)
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{
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locked = false;
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glAssert(glDeleteVertexArrays(1, &vao));
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glAssert(glDeleteBuffers(2, vbo));
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}
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}
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void Mesh::draw()
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{
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if(locked)
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{
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glAssert(glBindVertexArray(vao));
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glAssert(glDrawElements(GL_TRIANGLES, indices.size(), GL_UNSIGNED_INT, indices.data()));
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}
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}
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