VertexAttribute.h
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VertexAttribute.h
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	#ifndef _ECHOVERTEXATTRIBUTE_H_
	#define _ECHOVERTEXATTRIBUTE_H_

	#include <echo/Types.h>

	namespace Echo
	{
	class VertexBuffer;

	class VertexAttribute
	{
	public:
	struct ComponentTypes
	{
	enum _
	{
	FLOAT32,
	FLOAT64,
	SIGNED8,
	UNSIGNED8,
	SIGNED16,
	UNSIGNED16,
	SIGNED32,
	UNSIGNED32,

	// These are convenient types that define the base type and number of components.
	VECTOR2,
	VECTOR3,
	VECTOR4,
	TEXTUREUV,
	COLOUR,
	COLOUR_8
	};
	};
	typedef ComponentTypes::_ ComponentType;
	VertexAttribute(ComponentType type, Size numberOfComponents=1);
	~VertexAttribute();
	void SetNormalise(bool normalise);
	bool GetNormalise() const {return mNormalise;}
	Size GetWidth() const {return mWidth;}
	Size GetNumberOfComponents() const {return mNumberOfComponents;}
	Size GetOffset() const {return mOffset;}
	ComponentType GetComponentType() const {return mComponentType;}
	private:
	void SetType(ComponentType type, Size numberOfComponents);
	friend class VertexBuffer;
	// Offset only makes sense when part of a vertex buffer, it is determined by the buffer object.
	void SetOffset(Size offset){mOffset=offset;}
	private:
	ComponentType mComponentType;
	bool mNormalise;
	Size mWidth;
	Size mOffset;
	Size mNumberOfComponents;
	};
	}
	#endif