85 lines
2.9 KiB
C
85 lines
2.9 KiB
C
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//////////////////////////////////////////////////////////////////////////////////
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// SPARK particle engine //
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// Copyright (C) 2008-2009 - Julien Fryer - julienfryer@gmail.com //
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// //
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// This software is provided 'as-is', without any express or implied //
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// warranty. In no event will the authors be held liable for any damages //
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// arising from the use of this software. //
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// //
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// Permission is granted to anyone to use this software for any purpose, //
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// including commercial applications, and to alter it and redistribute it //
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// freely, subject to the following restrictions: //
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// //
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// 1. The origin of this software must not be misrepresented; you must not //
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// claim that you wrote the original software. If you use this software //
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// in a product, an acknowledgment in the product documentation would be //
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// appreciated but is not required. //
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// 2. Altered source versions must be plainly marked as such, and must not be //
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// misrepresented as being the original software. //
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// 3. This notice may not be removed or altered from any source distribution. //
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//////////////////////////////////////////////////////////////////////////////////
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#ifndef H_SPK_ROTATOR
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#define H_SPK_ROTATOR
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#include "Core/SPK_Modifier.h"
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namespace SPK
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{
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/**
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* @class Rotator
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* @brief A Modifier allowing to rotate particle with their rotation speed
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*
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* Instead of controlling directly the particle angle, this modifier allows to control the particle rotation speed.<br>
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* The rotator derives the particle angle from the particle rotation speed.<br>
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* <br>
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* For this modifier to work, the PARAM_ANGLE must be enabled (and can be random in addition but not mutable or interpolated)
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* and the PARAM_ROTATION_SPEED must be at least enabled in the model of the group of particles that are modified.
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*
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* @since 1.05.00
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*/
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class Rotator : public Modifier
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{
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SPK_IMPLEMENT_REGISTERABLE(Rotator)
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public :
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/////////////////
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// Constructor //
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/////////////////
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/** @brief Constructor of Rotator */
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inline Rotator();
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/**
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* @brief Creates and registers a new Rotator
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* @return A new registered Rotator
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*/
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static inline Rotator* create();
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private :
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virtual inline void modify(Particle& particle,float deltaTime) const;
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};
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inline Rotator::Rotator() : Modifier(ALWAYS | INSIDE_ZONE | OUTSIDE_ZONE) {}
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inline Rotator* Rotator::create()
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{
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Rotator* obj = new Rotator;
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registerObject(obj);
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return obj;
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}
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inline void Rotator::modify(Particle& particle,float deltaTime) const
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{
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float angle = particle.getParamCurrentValue(PARAM_ANGLE) + deltaTime * particle.getParamCurrentValue(PARAM_ROTATION_SPEED);
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particle.setParamCurrentValue(PARAM_ANGLE,angle);
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}
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}
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#endif
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