gamecodebook/Chapter14/VertexArray.h

// ----------------------------------------------------------------
// From Game Programming in C++ by Sanjay Madhav
// Copyright (C) 2017 Sanjay Madhav. All rights reserved.
// 
// Released under the BSD License
// See LICENSE in root directory for full details.
// ----------------------------------------------------------------

#pragma once
class VertexArray
{
public:
	// Different supported vertex layouts
	enum Layout
	{
		PosNormTex,
		PosNormSkinTex
	};

	VertexArray(const void* verts, unsigned int numVerts, Layout layout,
		const unsigned int* indices, unsigned int numIndices);
	~VertexArray();

	void SetActive();
	unsigned int GetNumIndices() const { return mNumIndices; }
	unsigned int GetNumVerts() const { return mNumVerts; }

	static unsigned int GetVertexSize(VertexArray::Layout layout);
private:
	// How many vertices in the vertex buffer?
	unsigned int mNumVerts;
	// How many indices in the index buffer
	unsigned int mNumIndices;
	// OpenGL ID of the vertex buffer
	unsigned int mVertexBuffer;
	// OpenGL ID of the index buffer
	unsigned int mIndexBuffer;
	// OpenGL ID of the vertex array object
	unsigned int mVertexArray;
};