VertexBufferLayout.h

Go to the documentation of this file.

#pragma once
 
#include <vector>
#include "GL/glew.h"
#include "Renderer.h"
#include <stdexcept>
 
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;
        }
        ASSERT(false);
        return 0;
    }
};
 
class VertexBufferLayout
{
private:
    std::vector<VertexBufferElement> m_Elements;
    unsigned int m_Stride;
 
public:
    VertexBufferLayout() :
        m_Stride(0) {};
 
    template <typename T>
    void Push(unsigned int count)
    {
        std::runtime_error(false);
    }
 
    template <>
    void Push<float>(unsigned int count)
    {
        VertexBufferElement vbe = {GL_FLOAT, count, GL_FALSE};
        m_Elements.push_back(vbe);
        m_Stride += count * VertexBufferElement::GetSizeOfType(GL_FLOAT);
    }
 
    template <>
    void Push<unsigned int>(unsigned int count)
    {
        VertexBufferElement vbe = {GL_UNSIGNED_INT, count, GL_FALSE};
        m_Elements.push_back(vbe);
        m_Stride += count * VertexBufferElement::GetSizeOfType(GL_UNSIGNED_INT);
    }
 
    template <>
    void Push<unsigned char>(unsigned int count)
    {
        VertexBufferElement vbe = {GL_UNSIGNED_BYTE, count, GL_TRUE};
        m_Elements.push_back(vbe);
        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;
    };
};