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78 lines
2.4 KiB
78 lines
2.4 KiB
1 year ago
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#include "bind_vertex_attrib_array.h"
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namespace igl{ namespace opengl{
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// This would be cleaner with C++17 if constexpr
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template <typename Scalar>
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IGL_INLINE void bind_vertex_attrib_array_helper(
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const GLint id,
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const int size,
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const int num_cols,
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const Scalar * data,
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const bool refresh);
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template <>
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IGL_INLINE void bind_vertex_attrib_array_helper<float>(
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const GLint id,
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const int size,
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const int num_cols,
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const float * data,
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const bool refresh)
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{
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if (refresh)
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glBufferData(GL_ARRAY_BUFFER, sizeof(float)*size, data, GL_DYNAMIC_DRAW);
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glVertexAttribPointer(id, num_cols, GL_FLOAT, GL_FALSE, 0, 0);
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};
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template <>
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IGL_INLINE void bind_vertex_attrib_array_helper<double>(
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const GLint id,
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const int size,
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const int num_cols,
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const double * data,
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const bool refresh)
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{
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// Are you really sure you want to use doubles? Are you going to change the
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// `in vec3` etc. in your vertex shader to `in dvec3` ?
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// Are you on a mac, where this will be emulated in software?
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if (refresh)
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glBufferData(GL_ARRAY_BUFFER, sizeof(double)*size, data, GL_DYNAMIC_DRAW);
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glVertexAttribLPointer(id, num_cols, GL_DOUBLE, 0, 0);
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};
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}}
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namespace igl{ namespace opengl{
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template <typename Scalar, int RowsAtCompileTime, int ColsAtCompileTime>
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IGL_INLINE GLint bind_vertex_attrib_array(
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const GLuint program_shader,
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const std::string &name,
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GLuint bufferID,
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const Eigen::Matrix<Scalar,RowsAtCompileTime,ColsAtCompileTime,Eigen::RowMajor> &M,
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const bool refresh)
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{
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GLint id = glGetAttribLocation(program_shader, name.c_str());
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if (id < 0)
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return id;
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if (M.size() == 0)
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{
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glDisableVertexAttribArray(id);
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return id;
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}
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glBindBuffer(GL_ARRAY_BUFFER, bufferID);
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bind_vertex_attrib_array_helper<Scalar>(
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id, M.size(), M.cols(), M.data(), refresh);
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glEnableVertexAttribArray(id);
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return id;
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}
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}}
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#ifdef IGL_STATIC_LIBRARY
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// Explicit template instantiation
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// generated by autoexplicit.sh
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template int igl::opengl::bind_vertex_attrib_array<float, -1, -1>(unsigned int, std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, unsigned int, Eigen::Matrix<float, -1, -1, 1, -1, -1> const&, bool);
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// generated by autoexplicit.sh
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template int igl::opengl::bind_vertex_attrib_array<float, -1, 3>(unsigned int, std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, unsigned int, Eigen::Matrix<float, -1, 3, 1, -1, 3> const&, bool);
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#endif
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