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5b89cb9 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 | // This file is part of libigl, a simple c++ geometry processing library.
//
// Copyright (C) 2013 Alec Jacobson <alecjacobson@gmail.com>
//
// This Source Code Form is subject to the terms of the Mozilla Public License
// v. 2.0. If a copy of the MPL was not distributed with this file, You can
// obtain one at http://mozilla.org/MPL/2.0/.
#include "create_index_vbo.h"
// http://www.songho.ca/opengl/gl_vbo.html#create
IGL_INLINE void igl::opengl::create_index_vbo(
const Eigen::MatrixXi & F,
GLuint & F_vbo_id)
{
// Generate Buffers
glGenBuffers(1,&F_vbo_id);
// Bind Buffers
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER,F_vbo_id);
// Copy data to buffers
// We expect a matrix with each vertex position on a row, we then want to
// pass this data to OpenGL reading across rows (row-major)
if(F.Options & Eigen::RowMajor)
{
glBufferData(
GL_ELEMENT_ARRAY_BUFFER,
sizeof(int)*F.size(),
F.data(),
GL_STATIC_DRAW);
}else
{
// Create temporary copy of transpose
Eigen::MatrixXi FT = F.transpose();
// If its column major then we need to temporarily store a transpose
glBufferData(
GL_ELEMENT_ARRAY_BUFFER,
sizeof(int)*F.size(),
FT.data(),
GL_STATIC_DRAW);
}
// bind with 0, so, switch back to normal pointer operation
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
}
#ifdef IGL_STATIC_LIBRARY
// Explicit template instantiation
#endif
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