ParticleSimulator/VertexBufferLayout.h at master · CompPhysGeek/ParticleSimulator · GitHub

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#pragma once
#include <vector>
#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;
		}
		ASSERT(false);
		return 0;
	}
};
class VertexBufferLayout
{
private:
	unsigned int m_Stride;
	std::vector<VertexBufferElement> m_Elements;
public:
	VertexBufferLayout()
		: m_Stride(0) {}

	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 += VertexBufferElement::GetSizeOfType(GL_FLOAT) * count;
	}
	template<>
	void Push<unsigned int>(unsigned int count)
	{
		m_Elements.push_back({ GL_UNSIGNED_INT,count,GL_FALSE});
		m_Stride += VertexBufferElement::GetSizeOfType(GL_UNSIGNED_INT) * count;
	}
	template<>
	void Push<unsigned char>(unsigned int count)
	{
		m_Elements.push_back({ GL_UNSIGNED_BYTE,count,GL_TRUE});
		m_Stride += VertexBufferElement::GetSizeOfType(GL_UNSIGNED_BYTE) * count;
	}

	inline const std::vector<VertexBufferElement>& GetElements() const { return m_Elements; }
	inline unsigned int GetStride() const { return m_Stride; }
};