genesis-3d_engine/Engine/addons/sprite/spritemesh.cc

/****************************************************************************
Copyright (c) 2011-2013,WebJet Business Division,CYOU

http://www.genesis-3d.com.cn

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
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The above copyright notice and this permission notice shall be included in
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
****************************************************************************/
#include "stdneb.h"
#include "serialization/serialize.h"
#include "rendersystem/base/VertexComponent.h"
#include "meshbuilder/parallelogrambuilder.h"
#include "graphicsystem/base/GraphicBufferData.h"
#include "graphicsystem/GraphicSystem.h"
#include "resource/resinfo.h"
#include "foundation/math/intersection.h"

#include "spritemesh.h"
#include "spritevertex.h"
#include "spriteblock.h"
#include "spriteimage.h"
#include "spritepackage.h"

namespace Sprite
{
	using namespace Math;
	class _sprite_vertex
	{
	public:
		float3 position;    //
		float2 tex_uv;
		static const SizeT vertex_bias_in_byte = 0;
		//static const SizeT normal_bias_in_byte = sizeof(float3);
		static const Util::Array<RenderBase::VertexComponent>& GetVertexComponents()
		{
			if (0 == sVertexComponents.Size())
			{
				sVertexComponents.Append(RenderBase::VertexComponent(RenderBase::VertexComponent::Position,0, RenderBase::VertexComponent::Float3));
				sVertexComponents.Append(RenderBase::VertexComponent(RenderBase::VertexComponent::TexCoord,0, RenderBase::VertexComponent::Float2));
			}

			return sVertexComponents;
		}
	private:
		static Util::Array<RenderBase::VertexComponent> sVertexComponents;
	};
	Util::Array<RenderBase::VertexComponent> _sprite_vertex::sVertexComponents;

	template<typename Vertex>
	inline void _setupVertexIndex(Graphic::VertexBufferData2& vbd2, SizeT vertex_count, Graphic::IndexBufferData2& ibd2, SizeT index_count, bool dynamic_vertex)
	{
		vbd2.Setup(vertex_count, sizeof(Vertex), 
			dynamic_vertex ? RenderBase::BufferData::Dynamic : RenderBase::BufferData::Static, 
			RenderBase::PrimitiveTopology::TriangleList, true);

		ibd2.Setup(index_count, RenderBase::BufferData::Static, RenderBase::IndexBufferData::Int16, true);
	}

	const uint SpriteMesh::sVersion = 1;
	const uint SpriteRectMesh::sVersion = 1;

#define DEFINE_SERIAL_ITEM_NAME(name) static const char* g##name##Tag = #name

	DEFINE_SERIAL_ITEM_NAME(Name);
	DEFINE_SERIAL_ITEM_NAME(Version);
	DEFINE_SERIAL_ITEM_NAME(PixelPerUnit);//int mPixelPerUnit;
	DEFINE_SERIAL_ITEM_NAME(Rotation);//Math::quaternion mRotation;

	__ImplementClass(SpriteMesh,'SPME',SpriteObject);

	SpriteMesh::~SpriteMesh()
	{

	}

	SpriteMesh::SpriteMesh()
		:mMark(ArgNone)
	{

	}

	SpriteMesh::SpriteMesh(Arguments mark)
		:mMark(mark)
	{
	}

	void SpriteMesh::Save(GPtr<Serialization::SerializeWriter>& pWriter) const
	{
		pWriter->SerializeVersion(sVersion);

		__SaveSuper(pWriter);
		pWriter->SerializeString(gNameTag, mName);
	}

	void SpriteMesh::Load(const GPtr<Serialization::SerializeReader>& pReader)
	{
		Serialization::SVersion version;
		pReader->SerializeVersion(version);
		__LoadSuper(pReader);

		pReader->SerializeString(gNameTag, mName);
	}

	void SpriteMesh::CopyFrom(const GPtr<SpriteObject>& obj)
	{
		Super::CopyFrom(obj);
		GPtr<SpriteMesh> sub = obj.downcast<SpriteMesh>();
		mMark = sub->mMark;
		mName = sub->mName;
	}


	Math::bbox SpriteMesh::CreateVertex(SpriteVertexUnit& sv, const GPtr<SpriteImage> image, const GPtr<SpriteBlock>& block)
	{
		/// empty.
		return Math::bbox::Zero;
	}

	Math::bbox SpriteMesh::UpdateVertex(SpriteVertexUnit& sv, const GPtr<SpriteImage> image, const GPtr<SpriteBlock>& block)
	{
		/// empty.
		return Math::bbox::Zero;
	}

	__ImplementClass(SpriteRectMesh,'SRME',SpriteMesh);
	SpriteRectMesh::SpriteRectMesh()
		:Super(Super::ArgBlock)
		,mPixelPerUnit(32.0f)  ///hack code yuan qing guo 
	{

	}

	SpriteRectMesh::~SpriteRectMesh()
	{

	}

	void SpriteRectMesh::Save(GPtr<Serialization::SerializeWriter>& pWriter) const
	{
		pWriter->SerializeVersion(sVersion);
		__SaveSuper(pWriter);
		pWriter->SerializeFloat(gPixelPerUnitTag, mPixelPerUnit);
		pWriter->SerializeQuaternion(gRotationTag, mRotation);
	}

	void SpriteRectMesh::Load(const GPtr<Serialization::SerializeReader>& pReader)
	{
		Serialization::SVersion version;
		pReader->SerializeVersion(version);

		__LoadSuper(pReader);

		pReader->SerializeFloat(gPixelPerUnitTag, mPixelPerUnit);
		pReader->SerializeQuaternion(gRotationTag, mRotation);
	}

	void SpriteRectMesh::SetPixelPerUnit(float value)
	{
		mPixelPerUnit = value;
		__SPRITE_OBJECT_CHANGE__
			__SPRITE_CHANGE__
	}

	void SpriteRectMesh::CopyFrom(const GPtr<SpriteObject>& obj)
	{
		Super::CopyFrom(obj);
		GPtr<SpriteRectMesh> sub = obj.downcast<SpriteRectMesh>();

		mPixelPerUnit = sub->mPixelPerUnit;
		mRotation = sub->mRotation;
		mVertexTemplate.Clear();
	}


	Math::bbox SpriteRectMesh::CreateVertex(SpriteVertexUnit& sv, const GPtr<SpriteImage> image, const GPtr<SpriteBlock>& block)
	{
		if (0 == mVertexTemplate.GetSize())
		{
			buildVertexTemplate();
		}

		SizeT vertex_count = RECT_VERTEX_COUNT;
		SizeT index_count = RECT_INDICES_COUNT;

		Graphic::VertexBufferData2 vbd2;
		Graphic::IndexBufferData2 ibd2;
		_setupVertexIndex<_sprite_vertex>(vbd2, vertex_count, ibd2, index_count, true);

		_sprite_vertex* vertices = vbd2.GetBufferPtr<_sprite_vertex>();//_SimpleVertex vertices[RECT_VERTEX_COUNT];
		vbd2.GetVertexComponents() = _sprite_vertex::GetVertexComponents();
		bbox box = setVertexByTemplate(vertices, image, block);

		ushort* indices = ibd2.GetBufferPtr<ushort>();//ushort indices[RECT_INDICES_COUNT];
		MeshBuilder::ParallelogramBuilder::SetIndices(indices);
		RenderBase::PrimitiveHandle handle = Graphic::GraphicSystem::Instance()->CreatePrimitiveHandle(&vbd2, &ibd2);

		sv.Setup(handle, vertex_count, index_count);

		return box;
	}

	Math::bbox SpriteRectMesh::UpdateVertex(SpriteVertexUnit& sv, const GPtr<SpriteImage> image, const GPtr<SpriteBlock>& block)
	{
		if (0 == mVertexTemplate.GetSize())
		{
			buildVertexTemplate();
		}

		Graphic::DynamicBuffer dvb;
		dvb.SetSize(RECT_VERTEX_COUNT * sizeof(_sprite_vertex));

		_sprite_vertex* vertices = dvb.GetBufferPtr<_sprite_vertex>();//_SimpleVertex vertices[RECT_VERTEX_COUNT];

		bbox box = setVertexByTemplate(vertices, image, block);

		RenderBase::PrimitiveHandle handle = sv.GetHandle();
		Graphic::GraphicSystem::Instance()->UpdatePrimitiveHandle(handle, &dvb, NULL);

		return box;
	}

	void SpriteRectMesh::buildVertexTemplate() const
	{
		SizeT vertex_count = RECT_VERTEX_COUNT;

		mVertexTemplate.Resize(vertex_count * sizeof(_vertex_template));		

		_vertex_template* vertices = mVertexTemplate.As<_vertex_template>();

		float3 top(0.0f, 0.5f, 0.0f);
		float3 right( 0.5f, 0.0f, 0.0f);
		float3 origin(0.5f, 0.5f, 0.0f);
		MeshBuilder::ParallelogramBuilder::Set(vertices, top, right, origin, 0);

		//if(mRotation != quaternion::identity())
		//{
		//	matrix44 tran = matrix44::rotationquaternion(mRotation);
		//	MeshBuilder::TransformPositions(vertices, vertex_count, sizeof(_vertex_template), 0, tran);
		//	MeshBuilder::TransformNormals(vertices, vertex_count, sizeof(_vertex_template), _vertex_template::normal_bias_in_byte, tran);
		//}
	}

	inline float3 __set_position(const float3& t_pos, const sizef& rect_size, const float2& anchor)
	{
		return float3((t_pos.x() - anchor.x()) * rect_size.width, (t_pos.y() - anchor.y()) * rect_size.height, t_pos.z());
	}

	Math::bbox SpriteRectMesh::setVertexByTemplate(_sprite_vertex* vertices, const GPtr<SpriteImage>& image, const GPtr<SpriteBlock>& block)
	{
		_vertex_template* v_template = mVertexTemplate.As<_vertex_template>();

		sizef rect_size = block->GetSize() * (image->GetPixelSize() / mPixelPerUnit);
		const float2& anchor = block->GetAnchor();

		vertices[0].position = mVertexBuffer[0] = __set_position(v_template[0].pos, rect_size, anchor);
		vertices[1].position = mVertexBuffer[1] = __set_position(v_template[1].pos, rect_size, anchor);
		vertices[2].position = mVertexBuffer[2] = __set_position(v_template[2].pos, rect_size, anchor);
		vertices[3].position = mVertexBuffer[3] = __set_position(v_template[3].pos, rect_size, anchor);

		if(mRotation != quaternion::identity())
		{
			matrix44 tran = matrix44::rotationquaternion(mRotation);
			MeshBuilder::TransformPositions(vertices, RECT_VERTEX_COUNT, sizeof(_vertex_template), 0, tran);
		}
		bbox box;
		box.begin_extend();
		box.extend(point(vertices[0].position.x(), vertices[0].position.y(), vertices[0].position.z()));
		box.extend(point(vertices[1].position.x(), vertices[1].position.y(), vertices[1].position.z()));
		box.extend(point(vertices[2].position.x(), vertices[2].position.y(), vertices[2].position.z()));
		box.extend(point(vertices[3].position.x(), vertices[3].position.y(), vertices[3].position.z()));
		box.end_extend();

		const sizef& size = block->GetSize();
		const point2df& pointMin = block->GetPoint();
		point2df pointMax = point2df(pointMin.left + size.width, pointMin.top + size.height);

		vertices[0].tex_uv = float2(pointMin.left, pointMin.top);
		vertices[1].tex_uv = float2(pointMax.left, pointMin.top);
		vertices[2].tex_uv = float2(pointMin.left, pointMax.top);
		vertices[3].tex_uv = float2(pointMax.left, pointMax.top);

		mIndicBuffer[0] = 0;
		mIndicBuffer[1] = 1;
		mIndicBuffer[2] = 2;
		mIndicBuffer[3] = 1;
		mIndicBuffer[4] = 3;
		mIndicBuffer[5] = 2;

		return box;
	}

	bool SpriteRectMesh::Intersect( const Math::Ray& localRay, Math::scalar& fout, scalar fTolerance /*= N_TINY*/ )
	{
		if (0 == mVertexTemplate.GetSize())
		{
			return false;
		}

		bool isPicked = false;
		for ( IndexT i = 0; i < 6;)
		{
			scalar f;
			ushort index0 = mIndicBuffer[i];
			ushort index1 = mIndicBuffer[i+1];
			ushort index2 = mIndicBuffer[i+2];
			float3 p1(mVertexBuffer[index0].x(), mVertexBuffer[index0].y(), mVertexBuffer[index0].z());
			float3 p2(mVertexBuffer[index1].x(), mVertexBuffer[index1].y(), mVertexBuffer[index1].z());
			float3 p3(mVertexBuffer[index2].x(), mVertexBuffer[index2].y(), mVertexBuffer[index2].z());
			if ( Math::Intersection::Intersect(localRay, p1, p2, p3, f, fTolerance ) )
			{
				isPicked = true;
				fout = (f < fout ? f : fout);
			}
			i += 3;
		}

		return isPicked;
	}

}