mirror of https://github.com/axmolengine/axmol.git
253 lines
8.8 KiB
C++
253 lines
8.8 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://axis-project.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 "CCPULineEmitter.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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NS_CC_BEGIN
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// Constants
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const Vec3 PULineEmitter::DEFAULT_END(0, 0, 0);
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const float PULineEmitter::DEFAULT_MIN_INCREMENT = 0.0f;
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const float PULineEmitter::DEFAULT_MAX_INCREMENT = 0.0f;
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const float PULineEmitter::DEFAULT_MAX_DEVIATION = 0.0f;
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//-----------------------------------------------------------------------
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PULineEmitter::PULineEmitter()
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: PUEmitter()
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, _end(DEFAULT_END)
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, _maxDeviation(DEFAULT_MAX_DEVIATION)
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, _minIncrement(DEFAULT_MIN_INCREMENT)
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, _maxIncrement(DEFAULT_MAX_INCREMENT)
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, _increment(0.0f)
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, _length(0.0f)
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, _incrementsLeft(true)
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, _first(true)
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, _scaledMaxDeviation(0.0f)
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, _scaledMinIncrement(0.0f)
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, _scaledMaxIncrement(0.0f)
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, _scaledLength(0.0f)
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{}
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//-----------------------------------------------------------------------
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void PULineEmitter::notifyStart()
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{
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// Reset the incremental attributes to allow a restart.
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PUEmitter::notifyStart();
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_increment = 0.0f;
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_incrementsLeft = true;
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_first = true;
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}
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//-----------------------------------------------------------------------
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void PULineEmitter::notifyRescaled(const Vec3& scale)
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{
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// Scale the internal attributes and use them, otherwise this results in too many calculations per particle
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PUEmitter::notifyRescaled(scale);
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float scaleLength = scale.length();
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_scaledEnd.set(_end.x * scale.x, _end.y * scale.y, _end.z * scale.z);
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_scaledMaxDeviation = _maxDeviation * scaleLength;
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_scaledMinIncrement = _minIncrement * scaleLength;
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_scaledMaxIncrement = (_maxIncrement - _minIncrement) * scaleLength;
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_scaledLength = _scaledEnd.length();
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}
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//-----------------------------------------------------------------------
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unsigned short PULineEmitter::calculateRequestedParticles(float timeElapsed)
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{
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unsigned short requested = PUEmitter::calculateRequestedParticles(timeElapsed);
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if (_scaledMaxIncrement > 0)
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{
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// Do not create particles if there are no increments left
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if (!_incrementsLeft)
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{
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// Set back to 0 again
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requested = 0;
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}
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////FIXME
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//// For duration + repeat/delay: Clear the particles and start all over again.
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// if (!_isEnabled)
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//{
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// notifyStart();
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// mParentTechnique->lockAllParticles(); // Needed to set the first generated particle also first in the
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// list with particles
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// }
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}
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return requested;
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}
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//-----------------------------------------------------------------------
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const Vec3& PULineEmitter::getEnd() const
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{
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return _end;
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}
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//-----------------------------------------------------------------------
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void PULineEmitter::setEnd(const Vec3& end)
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{
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_end = end;
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_scaledEnd.set(_end.x * _emitterScale.x, _end.y * _emitterScale.y, _end.z * _emitterScale.z);
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_length = _end.length();
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}
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//-----------------------------------------------------------------------
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float PULineEmitter::getMaxIncrement() const
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{
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return _maxIncrement;
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}
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//-----------------------------------------------------------------------
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void PULineEmitter::setMaxIncrement(float maxIncrement)
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{
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_maxIncrement = maxIncrement;
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_scaledMaxIncrement = _maxIncrement * _emitterScale.length();
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}
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//-----------------------------------------------------------------------
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float PULineEmitter::getMinIncrement() const
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{
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return _minIncrement;
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}
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//-----------------------------------------------------------------------
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void PULineEmitter::setMinIncrement(float minIncrement)
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{
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_minIncrement = minIncrement;
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_scaledMinIncrement = _minIncrement * _emitterScale.length();
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}
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//-----------------------------------------------------------------------
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float PULineEmitter::getMaxDeviation() const
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{
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return _maxDeviation;
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}
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//-----------------------------------------------------------------------
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void PULineEmitter::setMaxDeviation(float maxDeviation)
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{
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_maxDeviation = maxDeviation;
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_scaledMaxDeviation = _maxDeviation * _emitterScale.length();
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}
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//-----------------------------------------------------------------------
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void PULineEmitter::initParticlePosition(PUParticle3D* particle)
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{
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// Remark: Don't take the orientation of the node into account. The mEnd position is leading.
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if (_autoDirection || (_scaledMaxDeviation > 0.0f && !_first))
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{
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// Generate a random vector perpendicular on the line if this is required
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Vec3::cross(_end, Vec3(CCRANDOM_MINUS1_1(), CCRANDOM_MINUS1_1(), CCRANDOM_MINUS1_1()), &_perpendicular);
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_perpendicular.normalize();
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}
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// If mMaxIncrement has been set, the particle emission follows a trajectory path along the line
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float fraction = 0.0f;
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if (_scaledMaxIncrement > 0.0f)
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{
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if (!_first)
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{
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_increment += (_scaledMinIncrement + CCRANDOM_0_1() * _scaledMaxIncrement);
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if (_increment >= _scaledLength)
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{
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_incrementsLeft = false;
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}
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fraction = _increment / _scaledLength;
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}
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}
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else
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{
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fraction = CCRANDOM_0_1();
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}
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// If the deviation has been set, generate a position with a certain distance from the line
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getDerivedPosition();
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if (_scaledMaxDeviation > 0.0f && _incrementsLeft)
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{
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if (!_first)
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{
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Vec3 basePosition = _derivedPosition + fraction * _scaledEnd;
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particle->position = basePosition + _scaledMaxDeviation * CCRANDOM_0_1() * _perpendicular;
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particle->originalPosition = basePosition; // Position is without deviation from the line,
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// to make affectors a bit faster/easier.
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}
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else
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{
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particle->position = _derivedPosition;
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particle->originalPosition = particle->position;
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}
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}
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else
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{
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particle->position = _derivedPosition + fraction * _scaledEnd;
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particle->originalPosition = particle->position;
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}
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_first = false;
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}
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//-----------------------------------------------------------------------
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void PULineEmitter::initParticleDirection(PUParticle3D* particle)
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{
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if (_autoDirection)
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{
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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 = _perpendicular.randomDeviant(angle, mUpVector);
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particle->direction = PUUtil::randomDeviant(_perpendicular, 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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particle->direction = _perpendicular;
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particle->originalDirection = particle->direction;
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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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PULineEmitter* PULineEmitter::create()
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{
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auto pe = new PULineEmitter();
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pe->autorelease();
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return pe;
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}
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void PULineEmitter::copyAttributesTo(PUEmitter* emitter)
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{
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PUEmitter::copyAttributesTo(emitter);
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PULineEmitter* lineEmitter = static_cast<PULineEmitter*>(emitter);
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lineEmitter->setEnd(_end); // Force calculation of the length
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lineEmitter->_length = _length;
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lineEmitter->setMinIncrement(_minIncrement);
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lineEmitter->setMaxIncrement(_maxIncrement);
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lineEmitter->setMaxDeviation(_maxDeviation);
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}
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PULineEmitter* PULineEmitter::clone()
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{
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auto be = PULineEmitter::create();
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copyAttributesTo(be);
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return be;
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}
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NS_CC_END |