ogrespheremeshcollisionshape.cpp

opcode是功能强大

///////////////////////////////////////////////////////////////////////////////
///  @file OgreSphereMeshCollisionShape.cpp
///  @brief <TODO: insert file description here>
///
///  @author The OgreOpcode Team @date 28-05-2005
///
///////////////////////////////////////////////////////////////////////////////
///
///  This file is part of OgreOpcode.
///
///  A lot of the code is based on the Nebula Opcode Collision module, see docs/Nebula_license.txt
///
///  OgreOpcode is free software; you can redistribute it and/or
///  modify it under the terms of the GNU Lesser General Public
///  License as published by the Free Software Foundation; either
///  version 2.1 of the License, or (at your option) any later version.
///
///  OgreOpcode 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 the GNU
///  Lesser General Public License for more details.
///
///  You should have received a copy of the GNU Lesser General Public
///  License along with OgreOpcode; if not, write to the Free Software
///  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
///
///////////////////////////////////////////////////////////////////////////////
#include "OgreOpcodeExports.h"
#include "OgreSphereMeshCollisionShape.h"
#include "OgreCollisionReporter.h"
#include "OgreCollisionManager.h"
#include "OgreOpcodeMath.h"
#include "OgreOpcodeUtils.h"

using namespace Ogre;
namespace OgreOpcode
{
	//------------------------------------------------------------------------
	SphereMeshCollisionShape::SphereMeshCollisionShape(const Ogre::String& name)
		: ICollisionShape(name)
	{
	}

	//------------------------------------------------------------------------
	SphereMeshCollisionShape::~SphereMeshCollisionShape()
	{
		if (mEntity && mEntity->hasSkeleton())
		{
#ifdef BUILD_AGAINST_AZATHOTH
			mEntity->removeSoftwareSkinningRequest(false);
#else
			mEntity->removeSoftwareAnimationRequest(false);
#endif
		}
		delete[] mVertexBuf;
		delete[] mFaceBuf;
	}

	//------------------------------------------------------------------------
	///////////////////////////////////////////////////////////////////////////////
	/// Counts how many indices (faces) and vertices an entity contains.
	/// @param[in]  entity Entity to count its data.
	/// @param[out] index_count  Number of indices.
	/// @param[out] vertex_count Number of vertices.
	/// @author Yavin from the Ogre4J team
	///////////////////////////////////////////////////////////////////////////////
	void SphereMeshCollisionShape::countIndicesAndVertices(Entity * entity, size_t & index_count, size_t & vertex_count)
	{
		Mesh * mesh = entity->getMesh().getPointer();

#ifdef BUILD_AGAINST_AZATHOTH
		bool hwSkinning = entity->isHardwareSkinningEnabled();
#else
		bool hwSkinning = entity->isHardwareAnimationEnabled();	
#endif
		bool added_shared = false;
		index_count  = 0;
		vertex_count = 0;

		// Calculate how many vertices and indices we're going to need
		for ( unsigned short i = 0; i < mesh->getNumSubMeshes(); ++i)
		{
			SubMesh* submesh = mesh->getSubMesh( i );

			// We only need to add the shared vertices once
			if(submesh->useSharedVertices)
			{
				if( !added_shared )
				{
					vertex_count += mesh->sharedVertexData->vertexCount;
					added_shared = true;
				}
			}
			else
			{
				vertex_count += submesh->vertexData->vertexCount;
			}

			// Add the indices
			index_count += submesh->indexData->indexCount;
		}
	}


	//------------------------------------------------------------------------
	//////////////////////////////////////////////////////////////////////////
	/// Converts mesh vertex and face data into simple float arrays.
	/// If the buffer parameters are null then that data is not converted.
	/// @param[in]  entity              Entity to extract data from.
	/// @param[out] vertexBuf          Target vertex data array (can be null).
	/// @param[in]  size_t vertex_count Number of vertices.
	/// @param[out] faceData            Target face data array (can be null).
	/// @param[int] index_count         Number of indices.
	/// @author Yavin from the Ogre4J team
	//////////////////////////////////////////////////////////////////////////
	void SphereMeshCollisionShape::convertMeshData(Entity * entity,
		float * vertexBuf, size_t vertex_count,
		size_t * faceBuf, size_t index_count)
	{
		//---------------------------------------------------------------------
		// CONVERT MESH DATA
		//---------------------------------------------------------------------
		MeshPtr mesh = entity->getMesh();
		bool added_shared = false;
		size_t current_offset = 0;
		size_t shared_offset = 0;
		size_t next_offset = 0;
		size_t index_offset = 0;
		int numOfSubs = 0;

		bool useSoftwareBlendingVertices = entity->hasSkeleton();

		if (useSoftwareBlendingVertices)
		{
			entity->_updateAnimation();
		}

		// Run through the submeshes again, adding the data into the arrays
		for ( size_t i = 0; i < mesh->getNumSubMeshes(); ++i)
		{
			SubMesh* submesh = mesh->getSubMesh(i);
			bool useSharedVertices = submesh->useSharedVertices;

			if (vertexBuf)
			{
				//----------------------------------------------------------------
				// GET VERTEXDATA
				//----------------------------------------------------------------
				const VertexData * vertex_data;
				if(useSoftwareBlendingVertices)
#ifdef BUILD_AGAINST_AZATHOTH
					vertex_data = useSharedVertices ? entity->_getSharedBlendedVertexData() : entity->getSubEntity(i)->_getBlendedVertexData();
#else
					vertex_data = useSharedVertices ? entity->_getSkelAnimVertexData() : entity->getSubEntity(i)->_getSkelAnimVertexData();
#endif
				else
					vertex_data = useSharedVertices ? mesh->sharedVertexData : submesh->vertexData;

				if((!useSharedVertices)||(useSharedVertices && !added_shared))
				{
					if(useSharedVertices)
					{
						added_shared = true;
						shared_offset = current_offset;
					}

					const VertexElement* posElem =
						vertex_data->vertexDeclaration->findElementBySemantic(Ogre::VES_POSITION);

					HardwareVertexBufferSharedPtr vbuf =
						vertex_data->vertexBufferBinding->getBuffer(posElem->getSource());

					unsigned char* vertex =
						static_cast<unsigned char*>(vbuf->lock(HardwareBuffer::HBL_READ_ONLY));

					// There is _no_ baseVertexPointerToElement() which takes an Ogre::Real or a double
					//  as second argument. So make it float, to avoid trouble when Ogre::Real is
					//  comiled/typedefed as double:
					float* pReal;

#ifdef BUILD_AGAINST_AZATHOTH
					if (useSoftwareBlendingVertices)
					{
						// Blended bone data is computed in world space.
						// Opcode expects data in local coordinates.
						Matrix4 xform = entity->_getParentNodeFullTransform().inverse();

						for( size_t j = 0; j < vertex_data->vertexCount; ++j, vertex += vbuf->getVertexSize())
						{
							posElem->baseVertexPointerToElement(vertex, &pReal);
							Vector3 v = Vector3(pReal[0],pReal[1],pReal[2]);
							v = xform * v;
							size_t n = current_offset*3 + j*3;
							vertexBuf[n + 0] = v[0];
							vertexBuf[n + 1] = v[1];
							vertexBuf[n + 2] = v[2];
						}
					}
					else
					{
						for( size_t j = 0; j < vertex_data->vertexCount; ++j, vertex += vbuf->getVertexSize())
						{
							posElem->baseVertexPointerToElement(vertex, &pReal);
							size_t n = current_offset*3 + j*3;
							vertexBuf[n + 0] = pReal[0];
							vertexBuf[n + 1] = pReal[1];
							vertexBuf[n + 2] = pReal[2];
						}
					}
#else

					for( size_t j = 0; j < vertex_data->vertexCount; ++j, vertex += vbuf->getVertexSize())
					{
						posElem->baseVertexPointerToElement(vertex, &pReal);

						size_t n = current_offset*3 + j*3;

						vertexBuf[n + 0] = pReal[0];
						vertexBuf[n + 1] = pReal[1];
						vertexBuf[n + 2] = pReal[2];
					}
#endif 	
					vbuf->unlock();
					next_offset += vertex_data->vertexCount;
				}
			}

			if (faceBuf)
			{
				//----------------------------------------------------------------
				// GET INDEXDATA
				//----------------------------------------------------------------
				IndexData* index_data = submesh->indexData;
				size_t numTris = index_data->indexCount / 3;
				HardwareIndexBufferSharedPtr ibuf = index_data->indexBuffer;

				bool use32bitindexes = (ibuf->getType() == HardwareIndexBuffer::IT_32BIT);

				uint32 *pLong = static_cast<uint32*>(ibuf->lock(HardwareBuffer::HBL_READ_ONLY));
				uint16* pShort = reinterpret_cast<uint16*>(pLong);


				size_t offset = (submesh->useSharedVertices)? shared_offset : current_offset;

				if ( use32bitindexes )
				{