2019-11-23 20:27:39 +08:00
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/****************************************************************************
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Copyright (C) 2013 Henry van Merode. All rights reserved.
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Copyright (c) 2015-2016 Chukong Technologies Inc.
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Copyright (c) 2017-2018 Xiamen Yaji Software Co., Ltd.
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2021-12-25 10:04:45 +08:00
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2022-07-10 09:47:27 +08:00
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https://adxeproject.github.io/
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2021-12-25 10:04:45 +08:00
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2019-11-23 20:27:39 +08:00
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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2021-12-25 10:04:45 +08:00
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2019-11-23 20:27:39 +08:00
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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2021-12-25 10:04:45 +08:00
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2019-11-23 20:27:39 +08:00
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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****************************************************************************/
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#include "CCPUInterParticleCollider.h"
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#include "extensions/Particle3D/PU/CCPUParticleSystem3D.h"
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NS_CC_BEGIN
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// Constants
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const float PUParticle3DInterParticleCollider::DEFAULT_ADJUSTMENT = 1.0f;
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const PUParticle3DInterParticleCollider::InterParticleCollisionResponse
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PUParticle3DInterParticleCollider::DEFAULT_COLLISION_RESPONSE =
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PUParticle3DInterParticleCollider::IPCR_AVERAGE_VELOCITY;
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//-----------------------------------------------------------------------
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PUParticle3DInterParticleCollider::PUParticle3DInterParticleCollider()
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: PUBaseCollider(), _adjustment(DEFAULT_ADJUSTMENT), _interParticleCollisionResponse(DEFAULT_COLLISION_RESPONSE)
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{}
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PUParticle3DInterParticleCollider::~PUParticle3DInterParticleCollider(void) {}
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//-----------------------------------------------------------------------
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float PUParticle3DInterParticleCollider::getAdjustment() const
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{
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return _adjustment;
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}
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//-----------------------------------------------------------------------
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void PUParticle3DInterParticleCollider::setAdjustment(float adjustment)
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{
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_adjustment = adjustment;
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}
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//-----------------------------------------------------------------------
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PUParticle3DInterParticleCollider::InterParticleCollisionResponse
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PUParticle3DInterParticleCollider::getInterParticleCollisionResponse() const
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{
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return _interParticleCollisionResponse;
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}
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//-----------------------------------------------------------------------
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void PUParticle3DInterParticleCollider::setInterParticleCollisionResponse(
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PUParticle3DInterParticleCollider::InterParticleCollisionResponse interParticleCollisionResponse)
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{
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_interParticleCollisionResponse = interParticleCollisionResponse;
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}
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//-----------------------------------------------------------------------
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void PUParticle3DInterParticleCollider::prepare()
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{
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// Activate spatial hashing
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// particleTechnique->setSpatialHashingUsed(true);
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}
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//-----------------------------------------------------------------------
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void PUParticle3DInterParticleCollider::unPrepare()
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{
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// Deactivate spatial hashing
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// particleTechnique->setSpatialHashingUsed(false);
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}
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//-----------------------------------------------------------------------
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bool PUParticle3DInterParticleCollider::validateAndExecuteSphereCollision(PUParticle3D* particle1,
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PUParticle3D* particle2,
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float /*timeElapsed*/)
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{
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PUParticle3D* vp1 = static_cast<PUParticle3D*>(particle1);
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PUParticle3D* vp2 = static_cast<PUParticle3D*>(particle2);
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if ((vp1->position - vp2->position).length() < _adjustment * (vp1->radius + vp2->radius))
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{
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/** Collision detected.
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@remarks
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The collision response calculation isn't accurate, but gives an acceptable result.
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*/
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Vec3 n = vp1->position - vp2->position;
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n.normalize();
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switch (_interParticleCollisionResponse)
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{
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case IPCR_AVERAGE_VELOCITY:
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{
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// Use average velocity; this keeps the particles in movement.
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float velocity1 = vp1->direction.length();
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float velocity2 = vp2->direction.length();
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float averageVelocity = 0.5f * (velocity1 + velocity2);
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vp1->direction = averageVelocity * vp2->mass * n;
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vp2->direction = averageVelocity * vp1->mass * -n;
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}
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break;
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case IPCR_ANGLE_BASED_VELOCITY:
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{
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// The new velocity is based on the angle between original direction and new direction.
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// Note, that this usually means that the velocity decreases.
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float velocity1 =
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Vec3(std::abs(vp1->direction.x), std::abs(vp1->direction.y), std::abs(vp1->direction.z)).dot(n);
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float velocity2 =
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Vec3(std::abs(vp2->direction.x), std::abs(vp2->direction.y), std::abs(vp2->direction.z)).dot(n);
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vp1->direction = velocity1 * vp2->mass * n;
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vp2->direction = velocity2 * vp1->mass * -n;
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}
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break;
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}
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vp1->direction *= _bouncyness;
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vp2->direction *= _bouncyness;
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vp1->addEventFlags(PUParticle3D::PEF_COLLIDED);
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vp2->addEventFlags(PUParticle3D::PEF_COLLIDED);
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return true;
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}
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return false;
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}
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//-----------------------------------------------------------------------
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void PUParticle3DInterParticleCollider::updatePUAffector(PUParticle3D* /*particle*/, float /*deltaTime*/)
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{
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// CCASSERT(0, "nonsupport yet");
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// for (auto iter : _particleSystem->getParticles())
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//{
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// PUParticle3D *particle = iter;
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// Fast rejection: only visible, moving particles are able to collide, unless they are colliding already
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// Changed && into || in V1.3.1
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// if (//particle->particleType != Particle::PT_VISUAL ||
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// particle->hasEventFlags(PUParticle3D::PEF_COLLIDED) ||
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// particle->direction == Vec3::ZERO)
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// {
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// return;
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// }
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// // Determine whether neighbour particles are colliding.
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// SpatialHashTable<Particle*>* hashtable = particleTechnique->getSpatialHashTable();
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// if (hashtable)
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// {
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// SpatialHashTable<Particle*>::HashTableCell cell = hashtable->getCell(particle->position);
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// if (cell.empty())
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// return;
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// unsigned int size = static_cast<unsigned int>(cell.size());
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// for (unsigned int i = 0; i < size; ++i)
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// {
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// Particle* p = cell[i];
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// // Don't check if it is the same particle or the particle is already colliding.
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// if (particle != p && !p->hasEventFlags(PUParticle3D::PEF_COLLIDED))
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// {
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// // Check for collision
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// if (validateAndExecuteSphereCollision(particle, p, deltaTime))
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// {
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// return;
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// }
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// }
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// }
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// }
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//}
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}
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PUParticle3DInterParticleCollider* PUParticle3DInterParticleCollider::create()
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{
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auto pipc = new PUParticle3DInterParticleCollider();
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pipc->autorelease();
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return pipc;
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}
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void PUParticle3DInterParticleCollider::copyAttributesTo(PUAffector* affector)
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{
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PUBaseCollider::copyAttributesTo(affector);
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PUParticle3DInterParticleCollider* interParticleCollider =
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static_cast<PUParticle3DInterParticleCollider*>(affector);
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interParticleCollider->_adjustment = _adjustment;
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interParticleCollider->_interParticleCollisionResponse = _interParticleCollisionResponse;
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}
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NS_CC_END
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