62 lines
2.1 KiB
C++
62 lines
2.1 KiB
C++
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#include "vertex_array.h"
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#include <igl/opengl/report_gl_error.h>
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template <
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typename DerivedV,
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typename DerivedF>
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IGL_INLINE void igl::opengl::vertex_array(
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const Eigen::PlainObjectBase<DerivedV> & V,
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const Eigen::PlainObjectBase<DerivedF> & F,
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GLuint & va_id,
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GLuint & ab_id,
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GLuint & eab_id)
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{
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// Inputs should be in RowMajor storage. If not, we have no choice but to
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// create a copy.
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if(!(V.Options & Eigen::RowMajor))
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{
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Eigen::Matrix<
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typename DerivedV::Scalar,
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DerivedV::RowsAtCompileTime,
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DerivedV::ColsAtCompileTime,
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Eigen::RowMajor> VR = V;
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return vertex_array(VR,F,va_id,ab_id,eab_id);
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}
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if(!(F.Options & Eigen::RowMajor))
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{
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Eigen::Matrix<
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typename DerivedF::Scalar,
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DerivedF::RowsAtCompileTime,
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DerivedF::ColsAtCompileTime,
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Eigen::RowMajor> FR = F;
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return vertex_array(V,FR,va_id,ab_id,eab_id);
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}
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// Generate and attach buffers to vertex array
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glGenVertexArrays(1, &va_id);
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glGenBuffers(1, &ab_id);
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glGenBuffers(1, &eab_id);
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glBindVertexArray(va_id);
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glBindBuffer(GL_ARRAY_BUFFER, ab_id);
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const auto size_VScalar = sizeof(typename DerivedV::Scalar);
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const auto size_FScalar = sizeof(typename DerivedF::Scalar);
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glBufferData(GL_ARRAY_BUFFER,size_VScalar*V.size(),V.data(),GL_STATIC_DRAW);
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glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, eab_id);
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assert(sizeof(GLuint) == size_FScalar && "F type does not match GLuint");
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glBufferData(
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GL_ELEMENT_ARRAY_BUFFER, sizeof(GLuint)*F.size(), F.data(), GL_STATIC_DRAW);
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glVertexAttribPointer(
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0,
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V.cols(),
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size_VScalar==sizeof(float)?GL_FLOAT:GL_DOUBLE,
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GL_FALSE,
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V.cols()*size_VScalar,
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(GLvoid*)0);
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glEnableVertexAttribArray(0);
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glBindBuffer(GL_ARRAY_BUFFER, 0);
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glBindVertexArray(0);
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}
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#ifdef IGL_STATIC_LIBRARY
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template void igl::opengl::vertex_array<Eigen::Matrix<float, -1, 3, 1, -1, 3>, Eigen::Matrix<int, -1, 3, 1, -1, 3> >(Eigen::PlainObjectBase<Eigen::Matrix<float, -1, 3, 1, -1, 3> > const&, Eigen::PlainObjectBase<Eigen::Matrix<int, -1, 3, 1, -1, 3> > const&, unsigned int&, unsigned int&, unsigned int&);
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#endif
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