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// Copyright (C) 2002-2012 Nikolaus Gebhardt
// This file is part of the "Irrlicht Engine".
// For conditions of distribution and use, see copyright notice in irrlicht.h
#include "CParticleRingEmitter.h"
#include "os.h"
#include "IAttributes.h"
namespace irr
{
namespace scene
{
//! constructor
CParticleRingEmitter::CParticleRingEmitter(
const core::vector3df& center, f32 radius, f32 ringThickness,
const core::vector3df& direction, u32 minParticlesPerSecond,
u32 maxParticlesPerSecond, const video::SColor& minStartColor,
const video::SColor& maxStartColor, u32 lifeTimeMin, u32 lifeTimeMax,
s32 maxAngleDegrees,
const core::dimension2df& minStartSize,
const core::dimension2df& maxStartSize )
: Center(center), Radius(radius), RingThickness(ringThickness),
Direction(direction),
MaxStartSize(maxStartSize), MinStartSize(minStartSize),
MinParticlesPerSecond(minParticlesPerSecond),
MaxParticlesPerSecond(maxParticlesPerSecond),
MinStartColor(minStartColor), MaxStartColor(maxStartColor),
MinLifeTime(lifeTimeMin), MaxLifeTime(lifeTimeMax),
Time(0), Emitted(0), MaxAngleDegrees(maxAngleDegrees)
{
#ifdef _DEBUG
setDebugName("CParticleRingEmitter");
#endif
}
//! Prepares an array with new particles to emitt into the system
//! and returns how much new particles there are.
s32 CParticleRingEmitter::emitt(u32 now, u32 timeSinceLastCall, SParticle*& outArray)
{
Time += timeSinceLastCall;
u32 pps = (MaxParticlesPerSecond - MinParticlesPerSecond);
f32 perSecond = pps ? ((f32)MinParticlesPerSecond + os::Randomizer::frand() * pps) : MinParticlesPerSecond;
f32 everyWhatMillisecond = 1000.0f / perSecond;
if(Time > everyWhatMillisecond)
{
Particles.set_used(0);
u32 amount = (u32)((Time / everyWhatMillisecond) + 0.5f);
Time = 0;
SParticle p;
if(amount > MaxParticlesPerSecond*2)
amount = MaxParticlesPerSecond * 2;
for(u32 i=0; i<amount; ++i)
{
f32 distance = os::Randomizer::frand() * RingThickness * 0.5f;
if (os::Randomizer::rand() % 2)
distance -= Radius;
else
distance += Radius;
p.pos.set(Center.X + distance, Center.Y, Center.Z + distance);
p.pos.rotateXZBy(os::Randomizer::frand() * 360, Center );
p.startTime = now;
p.vector = Direction;
if(MaxAngleDegrees)
{
core::vector3df tgt = Direction;
tgt.rotateXYBy(os::Randomizer::frand() * MaxAngleDegrees, Center );
tgt.rotateYZBy(os::Randomizer::frand() * MaxAngleDegrees, Center );
tgt.rotateXZBy(os::Randomizer::frand() * MaxAngleDegrees, Center );
p.vector = tgt;
}
p.endTime = now + MinLifeTime;
if (MaxLifeTime != MinLifeTime)
p.endTime += os::Randomizer::rand() % (MaxLifeTime - MinLifeTime);
if (MinStartColor==MaxStartColor)
p.color=MinStartColor;
else
p.color = MinStartColor.getInterpolated(MaxStartColor, os::Randomizer::frand());
p.startColor = p.color;
p.startVector = p.vector;
if (MinStartSize==MaxStartSize)
p.startSize = MinStartSize;
else
p.startSize = MinStartSize.getInterpolated(MaxStartSize, os::Randomizer::frand());
p.size = p.startSize;
Particles.push_back(p);
}
outArray = Particles.pointer();
return Particles.size();
}
return 0;
}
//! Writes attributes of the object.
void CParticleRingEmitter::serializeAttributes(io::IAttributes* out, io::SAttributeReadWriteOptions* options) const
{
out->addVector3d("Center", Center);
out->addFloat("Radius", Radius);
out->addFloat("RingThickness", RingThickness);
out->addVector3d("Direction", Direction);
out->addFloat("MinStartSizeWidth", MinStartSize.Width);
out->addFloat("MinStartSizeHeight", MinStartSize.Height);
out->addFloat("MaxStartSizeWidth", MaxStartSize.Width);
out->addFloat("MaxStartSizeHeight", MaxStartSize.Height);
out->addInt("MinParticlesPerSecond", MinParticlesPerSecond);
out->addInt("MaxParticlesPerSecond", MaxParticlesPerSecond);
out->addColor("MinStartColor", MinStartColor);
out->addColor("MaxStartColor", MaxStartColor);
out->addInt("MinLifeTime", MinLifeTime);
out->addInt("MaxLifeTime", MaxLifeTime);
out->addInt("MaxAngleDegrees", MaxAngleDegrees);
}
//! Reads attributes of the object.
void CParticleRingEmitter::deserializeAttributes(io::IAttributes* in, io::SAttributeReadWriteOptions* options)
{
Center = in->getAttributeAsVector3d("Center");
Radius = in->getAttributeAsFloat("Radius");
RingThickness = in->getAttributeAsFloat("RingThickness");
Direction = in->getAttributeAsVector3d("Direction");
if (Direction.getLength() == 0)
Direction.set(0,0.01f,0);
int idx = -1;
idx = in->findAttribute("MinStartSizeWidth");
if ( idx >= 0 )
MinStartSize.Width = in->getAttributeAsFloat(idx);
idx = in->findAttribute("MinStartSizeHeight");
if ( idx >= 0 )
MinStartSize.Height = in->getAttributeAsFloat(idx);
idx = in->findAttribute("MaxStartSizeWidth");
if ( idx >= 0 )
MaxStartSize.Width = in->getAttributeAsFloat(idx);
idx = in->findAttribute("MaxStartSizeHeight");
if ( idx >= 0 )
MaxStartSize.Height = in->getAttributeAsFloat(idx);
MinParticlesPerSecond = in->getAttributeAsInt("MinParticlesPerSecond");
MaxParticlesPerSecond = in->getAttributeAsInt("MaxParticlesPerSecond");
MinParticlesPerSecond = core::max_(1u, MinParticlesPerSecond);
MaxParticlesPerSecond = core::max_(MaxParticlesPerSecond, 1u);
MaxParticlesPerSecond = core::min_(MaxParticlesPerSecond, 200u);
MinParticlesPerSecond = core::min_(MinParticlesPerSecond, MaxParticlesPerSecond);
MinStartColor = in->getAttributeAsColor("MinStartColor");
MaxStartColor = in->getAttributeAsColor("MaxStartColor");
MinLifeTime = in->getAttributeAsInt("MinLifeTime");
MaxLifeTime = in->getAttributeAsInt("MaxLifeTime");
MinLifeTime = core::max_(0u, MinLifeTime);
MaxLifeTime = core::max_(MaxLifeTime, MinLifeTime);
MinLifeTime = core::min_(MinLifeTime, MaxLifeTime);
MaxAngleDegrees = in->getAttributeAsInt("MaxAngleDegrees");
}
} // end namespace scene
} // end namespace irr
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