mirror of https://github.com/axmolengine/axmol.git
275 lines
9.0 KiB
C++
275 lines
9.0 KiB
C++
/****************************************************************************
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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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https://axmolengine.github.io/
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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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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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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 "CCPUCircleEmitter.h"
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#include "extensions/Particle3D/PU/CCPUParticleSystem3D.h"
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#include "extensions/Particle3D/PU/CCPUUtil.h"
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#include "base/ccRandom.h"
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NS_AX_BEGIN
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// Constants
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const float PUCircleEmitter::DEFAULT_RADIUS = 100.0f;
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const float PUCircleEmitter::DEFAULT_STEP = 0.1f;
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const float PUCircleEmitter::DEFAULT_ANGLE = 0.0f;
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const bool PUCircleEmitter::DEFAULT_RANDOM = true;
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const Vec3 PUCircleEmitter::DEFAULT_NORMAL(0, 0, 0);
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//-----------------------------------------------------------------------
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PUCircleEmitter::PUCircleEmitter()
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: PUEmitter()
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, _radius(DEFAULT_RADIUS)
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, _circleAngle(DEFAULT_ANGLE)
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, _originalCircleAngle(DEFAULT_ANGLE)
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, _step(DEFAULT_STEP)
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, _x(0.0f)
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, _z(0.0f)
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, _random(DEFAULT_RANDOM)
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, _orientation()
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, _normal(DEFAULT_NORMAL)
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{}
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//-----------------------------------------------------------------------
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float PUCircleEmitter::getRadius() const
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{
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return _radius;
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}
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//-----------------------------------------------------------------------
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void PUCircleEmitter::setRadius(const float radius)
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{
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_radius = radius;
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}
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//-----------------------------------------------------------------------
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float PUCircleEmitter::getCircleAngle() const
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{
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return _originalCircleAngle;
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}
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//-----------------------------------------------------------------------
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void PUCircleEmitter::setCircleAngle(const float circleAngle)
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{
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_originalCircleAngle = circleAngle;
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_circleAngle = circleAngle;
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}
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//-----------------------------------------------------------------------
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float PUCircleEmitter::getStep() const
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{
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return _step;
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}
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//-----------------------------------------------------------------------
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void PUCircleEmitter::setStep(const float step)
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{
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_step = step;
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}
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//-----------------------------------------------------------------------
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bool PUCircleEmitter::isRandom() const
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{
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return _random;
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}
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//-----------------------------------------------------------------------
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void PUCircleEmitter::setRandom(const bool random)
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{
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_random = random;
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}
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//-----------------------------------------------------------------------
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const Quaternion& PUCircleEmitter::getOrientation() const
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{
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return _orientation;
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}
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//-----------------------------------------------------------------------
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const Vec3& PUCircleEmitter::getNormal() const
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{
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return _normal;
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}
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//-----------------------------------------------------------------------
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void PUCircleEmitter::setNormal(const Vec3& normal)
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{
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//_orientation = Vec3::UNIT_Y.getRotationTo(normal, Vec3::UNIT_X);
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_orientation = getRotationTo(Vec3::UNIT_Y, normal, Vec3::UNIT_X);
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_normal = normal;
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}
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//-----------------------------------------------------------------------
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void PUCircleEmitter::notifyStart()
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{
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// Reset the attributes to allow a restart.
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_circleAngle = _originalCircleAngle;
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}
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//-----------------------------------------------------------------------
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void PUCircleEmitter::initParticlePosition(PUParticle3D* particle)
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{
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float angle = 0;
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if (_random)
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{
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// Choose a random position on the circle.
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angle = ax::random(0.0, M_PI * 2.0);
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}
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else
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{
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// Follow the contour of the circle.
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_circleAngle += _step;
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_circleAngle = _circleAngle > M_PI * 2.0f ? _circleAngle - (M_PI * 2.0) : _circleAngle;
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angle = _circleAngle;
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}
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_x = cosf(angle);
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_z = sinf(angle);
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// ParticleSystem* sys = mParentTechnique->getParentSystem();
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// if (sys)
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{
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// Take both orientation of the node and its own orientation, based on the normal, into account
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Mat4 rotMat;
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Mat4::createRotation(static_cast<PUParticleSystem3D*>(_particleSystem)->getDerivedOrientation() * _orientation,
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&rotMat);
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particle->position = getDerivedPosition() +
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/*sys->getDerivedOrientation() * */ rotMat *
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(Vec3(_x * _radius * _emitterScale.x, 0, _z * _radius * _emitterScale.z));
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}
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// else
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//{
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// particle->position = getDerivedPosition() + _emitterScale * ( mOrientation * Vec3(mX * mRadius, 0, mZ * mRadius)
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//);
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// }
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particle->originalPosition = particle->position;
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}
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//-----------------------------------------------------------------------
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void PUCircleEmitter::initParticleDirection(PUParticle3D* particle)
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{
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if (_autoDirection)
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{
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// The value of the direction vector that has been set does not have a meaning for
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// the circle emitter.
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float angle = 0.0f;
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generateAngle(angle);
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if (angle != 0.0f)
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{
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// particle->direction = (mOrientation * Vec3(mX, 0, mZ) ).randomDeviant(angle, mUpVector);
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Mat4 mat;
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Mat4::createRotation(_orientation, &mat);
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Vec3 temp = mat * Vec3(_x, 0, _z);
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particle->direction = PUUtil::randomDeviant(temp, angle, _upVector);
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particle->originalDirection = particle->direction;
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}
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else
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{
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Mat4 rotMat;
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Mat4::createRotation(_orientation, &rotMat);
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particle->direction = rotMat * Vec3(_x, 0, _z);
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}
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}
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else
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{
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// Use the standard way
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PUEmitter::initParticleDirection(particle);
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}
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}
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PUCircleEmitter* PUCircleEmitter::create()
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{
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auto pe = new PUCircleEmitter();
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pe->autorelease();
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return pe;
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}
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ax::Quaternion PUCircleEmitter::getRotationTo(const Vec3& src,
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const Vec3& dest,
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const Vec3& fallbackAxis /*= Vec3::ZERO*/) const
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{
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// Based on Stan Melax's article in Game Programming Gems
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Quaternion q;
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// Copy, since cannot modify local
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Vec3 v0 = src;
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Vec3 v1 = dest;
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v0.normalize();
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v1.normalize();
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float d = v0.dot(v1);
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// If dot == 1, vectors are the same
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if (d >= 1.0f)
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{
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return Quaternion();
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}
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if (d < (1e-6f - 1.0f))
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{
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if (fallbackAxis != Vec3::ZERO)
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{
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// rotate 180 degrees about the fallback axis
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q.set(fallbackAxis, (float)M_PI);
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// q.FromAngleAxis(Radian(Math::PI), fallbackAxis);
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}
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else
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{
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// Generate an axis
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Vec3 axis /* = Vec3::UNIT_X.crossProduct(*this)*/;
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Vec3::cross(Vec3::UNIT_X, src, &axis);
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if (axis.lengthSquared() < (1e-06 * 1e-06)) // pick another if colinear
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// axis = Vec3::UNIT_Y.crossProduct(*this);
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Vec3::cross(Vec3::UNIT_Y, src, &axis);
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axis.normalize();
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// q.FromAngleAxis(Radian(Math::PI), axis);
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q.set(axis, (float)M_PI);
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}
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}
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else
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{
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/*float s = Math::Sqrt( (1+d)*2 );*/
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float s = sqrtf((1 + d) * 2);
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float invs = 1 / s;
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Vec3 c /*= v0.crossProduct(v1)*/;
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Vec3::cross(v0, v1, &c);
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q.x = c.x * invs;
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q.y = c.y * invs;
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q.z = c.z * invs;
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q.w = s * 0.5f;
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q.normalize();
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}
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return q;
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}
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void PUCircleEmitter::copyAttributesTo(PUEmitter* emitter)
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{
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PUEmitter::copyAttributesTo(emitter);
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PUCircleEmitter* circleEmitter = static_cast<PUCircleEmitter*>(emitter);
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circleEmitter->_radius = _radius;
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circleEmitter->_circleAngle = _circleAngle;
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circleEmitter->_originalCircleAngle = _originalCircleAngle;
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circleEmitter->_step = _step;
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circleEmitter->_random = _random;
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circleEmitter->_normal = _normal;
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circleEmitter->_orientation = _orientation;
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}
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PUCircleEmitter* PUCircleEmitter::clone()
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{
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auto be = PUCircleEmitter::create();
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copyAttributesTo(be);
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return be;
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}
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NS_AX_END |