GameCodingCompleteLinux/Source/GCC4/Graphics3D/Mesh.h

#pragma once
//========================================================================
// File: Mesh.h - classes to render meshes in D3D9 and D3D11
//
// Part of the GameCode4 Application
//
// GameCode4 is the sample application that encapsulates much of the source code
// discussed in "Game Coding Complete - 4th Edition" by Mike McShaffry and David
// "Rez" Graham, published by Charles River Media. 
// ISBN-10: 1133776574 | ISBN-13: 978-1133776574
//
// If this source code has found it's way to you, and you think it has helped you
// in any way, do the authors a favor and buy a new copy of the book - there are 
// detailed explanations in it that compliment this code well. Buy a copy at Amazon.com
// by clicking here: 
//    http://www.amazon.com/gp/product/1133776574/ref=olp_product_details?ie=UTF8&me=&seller=
//
// There's a companion web site at http://www.mcshaffry.com/GameCode/
// 
// The source code is managed and maintained through Google Code: 
//    http://code.google.com/p/gamecode4/
//
// (c) Copyright 2012 Michael L. McShaffry and David Graham
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser GPL v3
// as published by the Free Software Foundation.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See 
// http://www.gnu.org/licenses/lgpl-3.0.txt for more details.
//
// You should have received a copy of the GNU Lesser GPL v3
// along with this program; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
//
//========================================================================

#include "Geometry.h"
#include "SceneNodes.h"
#include "Material.h"
#include "Shaders.h"
#include "../ResourceCache/ResCache.h"

#include <assimp/cimport.h>
#include <assimp/scene.h>
#include <assimp/postprocess.h>

//
// class D3DSdkMeshResourceExtraData11					- Chapter 16, page 561
//
class OpenGLGlbMeshResourceExtraData : public IResourceExtraData
{
	friend class GlbMeshResourceLoader;

public:
	OpenGLGlbMeshResourceExtraData() { }
	virtual ~OpenGLGlbMeshResourceExtraData() { if (m_pScene) aiReleaseImport(m_pScene); }
	virtual std::string VToString() { return "OpenGLGlbMeshResourceExtraData"; }

	const aiScene* m_pScene;
};

//
// class SdkMeshResourceLoader							- Chapter 16, page 561
//
class GlbMeshResourceLoader : public IResourceLoader
{
public:
	virtual bool VUseRawFile() { return false; }
	virtual bool VDiscardRawBufferAfterLoad() { return false; }
	virtual unsigned int VGetLoadedResourceSize(char *rawBuffer, unsigned int rawSize);
	virtual bool VLoadResource(char *rawBuffer, unsigned int rawSize, std::shared_ptr<ResHandle> handle);
	virtual std::string VGetPattern() { return "*.glb"; }
};

////////////////////////////////////////////////////
//
// class TeapotMeshNode9				- Chapter X, page Y
//
////////////////////////////////////////////////////

class OpenGLShaderMeshNode : public SceneNode
{
public:
	OpenGLShaderMeshNode(const ActorId actorId,
		WeakBaseRenderComponentPtr renderComponent,
		std::string meshFileName,
		RenderPass renderPass,
		const glm::mat4 t);

	virtual int VOnRestore(Scene *pScene);
	virtual int VOnLostDevice(Scene *pScene) { return 0; }
	virtual int VRender(Scene *pScene);
	// virtual int VPick(Scene *pScene, RayCast *pRayCast);
	
protected:
	std::string				m_meshFileName;

	GLuint					*m_vao;
	GLuint					*m_vbo;
	GLuint					*m_ebo;
	size_t					*m_numIndices;
	size_t					*m_numVerts;
	size_t					m_numMeshes;
	OpenGLShaderProgram		m_ShaderProgram;
};

class OpenGLTeapotMeshNode : public OpenGLShaderMeshNode
{
public:
	OpenGLTeapotMeshNode(const ActorId actorId, WeakBaseRenderComponentPtr renderComponent, RenderPass renderPass, glm::mat4 t)
		: OpenGLShaderMeshNode(actorId, renderComponent, "art/3d assets/fantasy town kit/models/gltf format/hedge.glb", renderPass, t) { }
	bool VIsVisible() { return true; }
};