axmol/extensions/Particle3D/PU/CCPUVertexEmitter.cpp

/****************************************************************************
 Copyright (C) 2013 Henry van Merode. All rights reserved.
 Copyright (c) 2015-2016 Chukong Technologies Inc.
 Copyright (c) 2017-2018 Xiamen Yaji Software Co., Ltd.

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#include "CCPUVertexEmitter.h"
#include "extensions/Particle3D/PU/CCPUParticleSystem3D.h"

NS_CC_BEGIN
//// Constants
// const unsigned short Particle3DVertexEmitter::DEFAULT_STEP = 1;
// const unsigned short Particle3DVertexEmitter::DEFAULT_SEGMENTS = 1;
// const unsigned short Particle3DVertexEmitter::DEFAULT_ITERATIONS = 1;
//
////-----------------------------------------------------------------------
// Particle3DVertexEmitter::Particle3DVertexEmitter() : ParticleEmitter(),
//	mPositionElement(0),
//	mVertexData(0),
//	mVertexBuffer(0),
//	mMesh(0),
//	mSubMesh(0),
//	mVertexSize(12),
//	mMaxVertexCount(0),
//	mVertexCount(0),
//	mStep(DEFAULT_STEP),
//	mSegments(DEFAULT_SEGMENTS),
//	mMeshProcessed(false),
//	mAllVerticesProcessed(false),
//	mSubMeshNumber(0),
//	mIterations(DEFAULT_ITERATIONS),
//	mMeshName(StringUtil::BLANK)
//{
//	mBuffer.setNull();
// }
////-----------------------------------------------------------------------
// unsigned short Particle3DVertexEmitter::getIterations() const
//{
//	return mIterations;
// }
////-----------------------------------------------------------------------
// void Particle3DVertexEmitter::setIterations(unsigned short iterations)
//{
//	mIterations = iterations;
// }
////-----------------------------------------------------------------------
// unsigned short Particle3DVertexEmitter::getSegments() const
//{
//	return mSegments;
// }
////-----------------------------------------------------------------------
// void Particle3DVertexEmitter::setSegments(unsigned short segments)
//{
//	mSegments = segments;
// }
////-----------------------------------------------------------------------
// unsigned short Particle3DVertexEmitter::getStep() const
//{
//	return mStep;
// }
////-----------------------------------------------------------------------
// void Particle3DVertexEmitter::setStep(unsigned short step)
//{
//	mStep = step;
// }
////-----------------------------------------------------------------------
// std::string_view Particle3DVertexEmitter::getMeshName() const
//{
//	return mMeshName;
// }
////-----------------------------------------------------------------------
// void Particle3DVertexEmitter::setMeshName(std::string_view meshName)
//{
//	_setDefaults(); // Triggers loading the new mesh
//	mMeshName = meshName;
// }
////-----------------------------------------------------------------------
// void Particle3DVertexEmitter::_notifyStart ()
//{
//	ParticleEmitter::_notifyStart();
//	_setDefaults();
// }
////-----------------------------------------------------------------------
// unsigned short Particle3DVertexEmitter::_calculateRequestedParticles(float timeElapsed)
//{
//	// Only return the requested number if the emitter can actually emit them
//	unsigned short requested = ParticleEmitter::_calculateRequestedParticles(timeElapsed);
//	if (requested <= mSpawnPositionList.size())
//	{
//		return requested;
//	}
//
//	return 0;
// }
////-----------------------------------------------------------------------
// void Particle3DVertexEmitter::_initParticlePosition(Particle* particle)
//{
//	// Get the first one from the list.
//	// The _calculateRequestedParticles() ensures that there are particles in the list.
//	// All positions in mSpawnPositionList are in localspace
//	ParticleSystem* sys = mParentTechnique->getParentSystem();
//	if (sys)
//	{
//		particle->position = getDerivedPosition() +
//			sys->getDerivedOrientation() *
//			(_mEmitterScale * *mSpawnPositionList.begin());
//	}
//	else
//	{
//		particle->position = getDerivedPosition() + _mEmitterScale * *mSpawnPositionList.begin();
//	}
//
//	mSpawnPositionList.pop_front();
//	particle->originalPosition = particle->position;
// }
////-----------------------------------------------------------------------
// void Particle3DVertexEmitter::_preProcessParticles(ParticleTechnique* technique, float timeElapsed)
//{
//	if (mAllVerticesProcessed)
//	{
//		return;
//	}
//
//	// Generate the next few spawn points if not all vertices are processed.
//	for (unsigned short i = 0; i < mIterations; ++i)
//	{
//		_generatePoints();
//		if (mAllVerticesProcessed)
//		{
//			return;
//		}
//	}
//
//	// Calculate the emitters position
//	getDerivedPosition();
// }
////-----------------------------------------------------------------------
// void Particle3DVertexEmitter::_setDefaults()
//{
//	// Set the default values except the name of the mesh, which may only be changed by the
//	// setMeshName() function
//	mSpawnPositionList.clear();
//	mPositionElement = 0;
//	mVertexData = 0;
//	mVertexBuffer = 0;
//	mMesh = 0;
//	mSubMesh = 0;
//	mMaxVertexCount = 0;
//	mVertexCount = 0;
//	mMeshProcessed = false;
//	mAllVerticesProcessed = false;
//	mSubMeshNumber = 0;
//
//	if (!mBuffer.isNull())
//	{
//		if (mBuffer->isLocked())
//		{
//			mBuffer->unlock();
//		}
//		mBuffer.setNull();
//	}
// }
////-----------------------------------------------------------------------
// void Particle3DVertexEmitter::_loadMesh ()
//{
//	Ogre::MeshPtr mesh = Ogre::MeshManager::getSingleton().load(mMeshName,
// Ogre::ResourceGroupManager::DEFAULT_RESOURCE_GROUP_NAME); 	mMesh = mesh.getPointer(); 	mMeshProcessed = false;
//
//	if (mMesh->getNumSubMeshes() > 0)
//	{
//		mSubMesh = mMesh->getSubMesh(0);
//	}
//	else
//	{
//		mSubMesh = 0;
//	}
// }
////-----------------------------------------------------------------------
// void Particle3DVertexEmitter::_generatePoints ()
//{
//	if (mAllVerticesProcessed)
//	{
//		return;
//	}
//
//	if (!mMesh && mMeshName != StringUtil::BLANK)
//	{
//		_loadMesh();
//	}
//
//	// At least process the vertices of the mesh itself and then all its submeshes
//	if (!mMeshProcessed)
//	{
//		_generatePointsFromMesh();
//	}
//	else
//	{
//		if (mSubMesh && !mSubMesh->useSharedVertices)
//		{
//			_generatePointsFromSubMesh();
//		}
//	}
//
//	if (mVertexCount > 0 && mVertexCount >= mMaxVertexCount)
//	{
//		// The vertices of 1 mesh/subMesh are processed. Determine whether more submeshes need to
//		// be processed.
//		mBuffer->unlock();
//		mBuffer.setNull();
//		mVertexCount = 0;
//		mMaxVertexCount = 0;
//		mVertexData = 0;
//		mVertexBuffer = 0;
//		mSubMeshNumber++;
//		if (mSubMeshNumber >= mMesh->getNumSubMeshes())
//		{
//			mAllVerticesProcessed = true;
//		}
//		else
//		{
//			mSubMesh = mMesh->getSubMesh(mSubMeshNumber);
//		}
//	}
// }
////-----------------------------------------------------------------------
// void Particle3DVertexEmitter::_generatePointsFromMesh ()
//{
//	if (mMaxVertexCount == 0 && mMesh)
//	{
//		mVertexData = mMesh->sharedVertexData;
//		if (!mVertexData)
//		{
//			mMeshProcessed = true;
//			return;
//		}
//		_fillVertexBuffer();
//	}
//
//	_generatePointsFromVertexBuffer();
//	if (mVertexCount >= mMaxVertexCount)
//	{
//		mMeshProcessed = true;
//	}
// }
////-----------------------------------------------------------------------
// void Particle3DVertexEmitter::_generatePointsFromSubMesh ()
//{
//	if (mMaxVertexCount == 0 && mSubMesh)
//	{
//		mVertexData = mSubMesh->vertexData;
//		if (!mVertexData)
//		{
//			return;
//		}
//		_fillVertexBuffer();
//	}
//
//	_generatePointsFromVertexBuffer();
// }
////-----------------------------------------------------------------------
// void Particle3DVertexEmitter::_fillVertexBuffer()
//{
//	mVertexCount = 0;
//	mMaxVertexCount = mVertexData->vertexCount - mStep;
//	mPositionElement = mVertexData->vertexDeclaration->findElementBySemantic(Ogre::VES_POSITION);
//	mBuffer = mVertexData->vertexBufferBinding->getBuffer(mPositionElement->getSource());
//	mVertexSize = mBuffer->getVertexSize();
//	mVertexBuffer = static_cast<unsigned char*>(mBuffer->lock(Ogre::HardwareBuffer::HBL_READ_ONLY));
// }
////-----------------------------------------------------------------------
// void Particle3DVertexEmitter::_generatePointsFromVertexBuffer()
//{
//	if (mMaxVertexCount > 1)
//	{
//		float* pReal;
//		mPositionElement->baseVertexPointerToElement(mVertexBuffer, &pReal);
//		Vec3 v1(pReal[0], pReal[1], pReal[2]);
//		mVertexBuffer += mStep * mVertexSize; // No validation; assume that it doesn't exceed.
//		mPositionElement->baseVertexPointerToElement(mVertexBuffer, &pReal);
//		Vec3 v2(pReal[0], pReal[1], pReal[2]);
//		_generatePoints (v1, v2);
//		mVertexCount += mStep;
//	}
// }
////-----------------------------------------------------------------------
// void Particle3DVertexEmitter::_generatePoints (const Vec3& startVector,
//	const Vec3& endVector,
//	float lengthIncrement)
//{
//	/*  Two possible ways of generating spawn points.
//		1. Generate (mSegments + 2) Vectors (including start and end vector), equally distributed.
//		2. Generate number of Vectors depending on the length between startVector and endVector. The
//			longer the length, the more vectors are generated.
//
//		The distribution of the spawn points in the list is as followed.
//		first iteration p1, 3 points:
//		- p1.3, p1.2, p1.1
//		second iteration, p2, 4 points:
//		- p2.4, p1.3, p2.3, p1.2, p2.2, p1.1, p2.1
//		second iteration, p3, 3 points:
//		- p3.3, p2.4, p3.2, p1.3, p3.1, p2.3, p1.2, p2.2, p1.1, p2.1
//	@remarks
//		Use objectspace for the vectors and only transform as soon as a particle is emitted.
//	*/
//	std::list<Vec3>::iterator iterator = mSpawnPositionList.end();
//	Vec3 start = startVector;
//	if (lengthIncrement > 0.0f)
//	{
//		// Determine number of dividers, based on the length increment
//		mSegments = (unsigned short)(((endVector - startVector).length()) / lengthIncrement - 1);
//	}
//     Vec3 increment = (endVector - startVector) / mSegments;
//
//	for (unsigned short i = 0; i <= mSegments; i++)
//	{
//		mSpawnPositionList.insert (iterator, start);
//		start += increment;
//		iterator--;
//		if (iterator != mSpawnPositionList.begin())
//			iterator--;
//	}
// }
NS_CC_END