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Viewing changes to source/Irrlicht/CParticleSphereEmitter.cpp

  • Committer: Mantas Kriaučiūnas
  • Date: 2011-07-18 13:06:25 UTC
  • Revision ID: mantas@akl.lt-20110718130625-c5pvifp61e7kj1ol
Included whole irrlicht SVN libraries to work around launchpad recipe issue with quilt, see https://answers.launchpad.net/launchpad/+question/165193

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source/Irrlicht/CParticleSphereEmitter.cpp
 
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// Copyright (C) 2002-2011 Nikolaus Gebhardt
 
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// This file is part of the "Irrlicht Engine".
 
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// For conditions of distribution and use, see copyright notice in irrlicht.h
 
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#include "IrrCompileConfig.h"
 
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#include "CParticleSphereEmitter.h"
 
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#include "os.h"
 
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#include "IAttributes.h"
 
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namespace irr
 
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{
 
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namespace scene
 
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{
 
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//! constructor
 
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CParticleSphereEmitter::CParticleSphereEmitter(
 
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        const core::vector3df& center, f32 radius,
 
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        const core::vector3df& direction, u32 minParticlesPerSecond,
 
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        u32 maxParticlesPerSecond, const video::SColor& minStartColor,
 
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        const video::SColor& maxStartColor, u32 lifeTimeMin, u32 lifeTimeMax,
 
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        s32 maxAngleDegrees,
 
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        const core::dimension2df& minStartSize,
 
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        const core::dimension2df& maxStartSize )
 
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        : Center(center), Radius(radius), Direction(direction),
 
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        MinStartSize(minStartSize), MaxStartSize(maxStartSize),
 
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        MinParticlesPerSecond(minParticlesPerSecond),
 
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        MaxParticlesPerSecond(maxParticlesPerSecond),
 
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        MinStartColor(minStartColor), MaxStartColor(maxStartColor),
 
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        MinLifeTime(lifeTimeMin), MaxLifeTime(lifeTimeMax),
 
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        Time(0), Emitted(0), MaxAngleDegrees(maxAngleDegrees)
 
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{
 
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        #ifdef _DEBUG
 
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        setDebugName("CParticleSphereEmitter");
 
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        #endif
 
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}
 
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//! Prepares an array with new particles to emitt into the system
 
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//! and returns how much new particles there are.
 
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s32 CParticleSphereEmitter::emitt(u32 now, u32 timeSinceLastCall, SParticle*& outArray)
 
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{
 
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        Time += timeSinceLastCall;
 
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        const u32 pps = (MaxParticlesPerSecond - MinParticlesPerSecond);
 
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        const f32 perSecond = pps ? ((f32)MinParticlesPerSecond + os::Randomizer::frand() * pps) : MinParticlesPerSecond;
 
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        const f32 everyWhatMillisecond = 1000.0f / perSecond;
 
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        if(Time > everyWhatMillisecond)
 
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        {
 
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                Particles.set_used(0);
 
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                u32 amount = (u32)((Time / everyWhatMillisecond) + 0.5f);
 
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                Time = 0;
 
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                SParticle p;
 
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                if(amount > MaxParticlesPerSecond*2)
 
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                        amount = MaxParticlesPerSecond * 2;
 
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                for(u32 i=0; i<amount; ++i)
 
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                {
 
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                        // Random distance from center
 
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                        const f32 distance = os::Randomizer::frand() * Radius;
 
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                        // Random direction from center
 
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                        p.pos.set(Center + distance);
 
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                        p.pos.rotateXYBy(os::Randomizer::frand() * 360.f, Center );
 
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                        p.pos.rotateYZBy(os::Randomizer::frand() * 360.f, Center );
 
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                        p.pos.rotateXZBy(os::Randomizer::frand() * 360.f, Center );
 
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                        p.startTime = now;
 
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                        p.vector = Direction;
 
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                        if(MaxAngleDegrees)
 
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                        {
 
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                                core::vector3df tgt = Direction;
 
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                                tgt.rotateXYBy(os::Randomizer::frand() * MaxAngleDegrees);
 
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                                tgt.rotateYZBy(os::Randomizer::frand() * MaxAngleDegrees);
 
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                                tgt.rotateXZBy(os::Randomizer::frand() * MaxAngleDegrees);
 
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                                p.vector = tgt;
 
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                        }
 
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                        p.endTime = now + MinLifeTime;
 
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                        if (MaxLifeTime != MinLifeTime)
 
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                                p.endTime += os::Randomizer::rand() % (MaxLifeTime - MinLifeTime);
 
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                        if (MinStartColor==MaxStartColor)
 
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                                p.color=MinStartColor;
 
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                        else
 
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                                p.color = MinStartColor.getInterpolated(MaxStartColor, os::Randomizer::frand());
 
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                        p.startColor = p.color;
 
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                        p.startVector = p.vector;
 
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                        if (MinStartSize==MaxStartSize)
 
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                                p.startSize = MinStartSize;
 
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                        else
 
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                                p.startSize = MinStartSize.getInterpolated(MaxStartSize, os::Randomizer::frand());
 
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                        p.size = p.startSize;
 
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                        Particles.push_back(p);
 
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                }
 
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                outArray = Particles.pointer();
 
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                return Particles.size();
 
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        }
 
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        return 0;
 
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}
 
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//! Writes attributes of the object.
 
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void CParticleSphereEmitter::serializeAttributes(io::IAttributes* out, io::SAttributeReadWriteOptions* options) const
 
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{
 
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        out->addVector3d("Center", Direction);
 
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        out->addFloat("Radius", Radius);
 
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        out->addVector3d("Direction", Direction);
 
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        out->addFloat("MinStartSizeWidth", MinStartSize.Width);
 
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        out->addFloat("MinStartSizeHeight", MinStartSize.Height);
 
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        out->addFloat("MaxStartSizeWidth", MaxStartSize.Width);
 
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        out->addFloat("MaxStartSizeHeight", MaxStartSize.Height); 
 
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        out->addInt("MinParticlesPerSecond", MinParticlesPerSecond);
 
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        out->addInt("MaxParticlesPerSecond", MaxParticlesPerSecond);
 
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        out->addColor("MinStartColor", MinStartColor);
 
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        out->addColor("MaxStartColor", MaxStartColor);
 
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        out->addInt("MinLifeTime", MinLifeTime);
 
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        out->addInt("MaxLifeTime", MaxLifeTime);
 
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        out->addInt("MaxAngleDegrees", MaxAngleDegrees);
 
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}
 
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//! Reads attributes of the object.
 
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void CParticleSphereEmitter::deserializeAttributes(io::IAttributes* in, io::SAttributeReadWriteOptions* options)
 
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{
 
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        Center = in->getAttributeAsVector3d("Center");
 
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        Radius = in->getAttributeAsFloat("Radius");
 
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        Direction = in->getAttributeAsVector3d("Direction");
 
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        if (Direction.getLength() == 0)
 
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                Direction.set(0,0.01f,0);
 
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        int idx = -1;
 
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        idx = in->findAttribute("MinStartSizeWidth");
 
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        if ( idx >= 0 )
 
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                MinStartSize.Width = in->getAttributeAsFloat(idx);
 
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        idx = in->findAttribute("MinStartSizeHeight");
 
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        if ( idx >= 0 )
 
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                MinStartSize.Height = in->getAttributeAsFloat(idx);
 
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        idx = in->findAttribute("MaxStartSizeWidth");
 
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        if ( idx >= 0 )
 
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                MaxStartSize.Width = in->getAttributeAsFloat(idx);
 
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        idx = in->findAttribute("MaxStartSizeHeight");
 
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        if ( idx >= 0 )
 
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                MaxStartSize.Height = in->getAttributeAsFloat(idx); 
 
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        MinParticlesPerSecond = in->getAttributeAsInt("MinParticlesPerSecond");
 
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        MaxParticlesPerSecond = in->getAttributeAsInt("MaxParticlesPerSecond");
 
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        MinParticlesPerSecond = core::max_(1u, MinParticlesPerSecond);
 
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        MaxParticlesPerSecond = core::max_(MaxParticlesPerSecond, 1u);
 
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        MaxParticlesPerSecond = core::min_(MaxParticlesPerSecond, 200u);
 
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        MinParticlesPerSecond = core::min_(MinParticlesPerSecond, MaxParticlesPerSecond);
 
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        MinStartColor = in->getAttributeAsColor("MinStartColor");
 
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        MaxStartColor = in->getAttributeAsColor("MaxStartColor");
 
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        MinLifeTime = in->getAttributeAsInt("MinLifeTime");
 
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        MaxLifeTime = in->getAttributeAsInt("MaxLifeTime");
 
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        MinLifeTime = core::max_(0u, MinLifeTime);
 
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        MaxLifeTime = core::max_(MaxLifeTime, MinLifeTime);
 
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        MinLifeTime = core::min_(MinLifeTime, MaxLifeTime);
 
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        MaxAngleDegrees = in->getAttributeAsInt("MaxAngleDegrees");
 
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}
 
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} // end namespace scene
 
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} // end namespace irr
 
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