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#ifndef VERTEXBUFFERLAYOUT_H
#define VERTEXBUFFERLAYOUT_H
#include <vector>
#include <GL/glew.h>
#include "Renderer.h"
struct VertexBufferElement
{
unsigned int type;
unsigned int count;
unsigned char normalized;
static unsigned int GetSizeOfType(unsigned int type)
{
switch (type)
{
case GL_FLOAT: return 4;
case GL_UNSIGNED_INT: return 4;
case GL_UNSIGNED_BYTE: return 1;
default: break;
}
ASSERT(false);
return(0);
}
};
class VertexBufferLayout
{
public:
VertexBufferLayout()
: m_stride(0) {}
~VertexBufferLayout() {}
template<typename T>
void Push(unsigned int count)
{
static_assert(false);
}
template<>
void Push<float>(unsigned int count)
{
m_elements.push_back({ GL_FLOAT, count, GL_FALSE });
m_stride += count * VertexBufferElement::GetSizeOfType(GL_FLOAT);
}
template<>
void Push<unsigned int>(unsigned int count)
{
m_elements.push_back({ GL_UNSIGNED_INT, count, GL_FALSE });
m_stride += count * VertexBufferElement::GetSizeOfType(GL_UNSIGNED_INT);
}
template<>
void Push<unsigned char>(unsigned int count)
{
m_elements.push_back({ GL_UNSIGNED_BYTE, count, GL_TRUE });
m_stride += count * VertexBufferElement::GetSizeOfType(GL_UNSIGNED_BYTE);
}
inline const std::vector<VertexBufferElement> GetElements() const& { return m_elements; }
inline unsigned int GetStride() const& { return m_stride; }
private:
std::vector<VertexBufferElement> m_elements;
unsigned int m_stride;
};
#endif // VERTEXBUFFERLAYOUT_H
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