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1// Copyright (C) 2002-2012 Nikolaus Gebhardt
2// This file is part of the "Irrlicht Engine".
3// For conditions of distribution and use, see copyright notice in irrlicht.h
4
5#include "CParticlePointEmitter.h"
6#include "os.h"
7#include "IAttributes.h"
8
9namespace irr
10{
11namespace scene
12{
13
14//! constructor
15CParticlePointEmitter::CParticlePointEmitter(
16 const core::vector3df& direction, u32 minParticlesPerSecond,
17 u32 maxParticlesPerSecond, video::SColor minStartColor,
18 video::SColor maxStartColor, u32 lifeTimeMin, u32 lifeTimeMax,
19 s32 maxAngleDegrees,
20 const core::dimension2df& minStartSize,
21 const core::dimension2df& maxStartSize)
22 : Direction(direction),
23 MinStartSize(minStartSize), MaxStartSize(maxStartSize),
24 MinParticlesPerSecond(minParticlesPerSecond),
25 MaxParticlesPerSecond(maxParticlesPerSecond),
26 MinStartColor(minStartColor), MaxStartColor(maxStartColor),
27 MinLifeTime(lifeTimeMin), MaxLifeTime(lifeTimeMax),
28 MaxAngleDegrees(maxAngleDegrees), Time(0), Emitted(0)
29{
30 #ifdef _DEBUG
31 setDebugName("CParticlePointEmitter");
32 #endif
33}
34
35
36//! Prepares an array with new particles to emitt into the system
37//! and returns how much new particles there are.
38s32 CParticlePointEmitter::emitt(u32 now, u32 timeSinceLastCall, SParticle*& outArray)
39{
40 Time += timeSinceLastCall;
41
42 const u32 pps = (MaxParticlesPerSecond - MinParticlesPerSecond);
43 const f32 perSecond = pps ? ((f32)MinParticlesPerSecond + os::Randomizer::frand() * pps) : MinParticlesPerSecond;
44 const f32 everyWhatMillisecond = 1000.0f / perSecond;
45
46 if (Time > everyWhatMillisecond)
47 {
48 Time = 0;
49 Particle.startTime = now;
50 Particle.vector = Direction;
51
52 if (MaxAngleDegrees)
53 {
54 core::vector3df tgt = Direction;
55 tgt.rotateXYBy(os::Randomizer::frand() * MaxAngleDegrees);
56 tgt.rotateYZBy(os::Randomizer::frand() * MaxAngleDegrees);
57 tgt.rotateXZBy(os::Randomizer::frand() * MaxAngleDegrees);
58 Particle.vector = tgt;
59 }
60
61 Particle.endTime = now + MinLifeTime;
62 if (MaxLifeTime != MinLifeTime)
63 Particle.endTime += os::Randomizer::rand() % (MaxLifeTime - MinLifeTime);
64
65 if (MinStartColor==MaxStartColor)
66 Particle.color=MinStartColor;
67 else
68 Particle.color = MinStartColor.getInterpolated(MaxStartColor, os::Randomizer::frand());
69
70 Particle.startColor = Particle.color;
71 Particle.startVector = Particle.vector;
72
73 if (MinStartSize==MaxStartSize)
74 Particle.startSize = MinStartSize;
75 else
76 Particle.startSize = MinStartSize.getInterpolated(MaxStartSize, os::Randomizer::frand());
77 Particle.size = Particle.startSize;
78
79 outArray = &Particle;
80 return 1;
81 }
82
83 return 0;
84}
85
86
87//! Writes attributes of the object.
88void CParticlePointEmitter::serializeAttributes(io::IAttributes* out, io::SAttributeReadWriteOptions* options) const
89{
90 out->addVector3d("Direction", Direction);
91 out->addFloat("MinStartSizeWidth", MinStartSize.Width);
92 out->addFloat("MinStartSizeHeight", MinStartSize.Height);
93 out->addFloat("MaxStartSizeWidth", MaxStartSize.Width);
94 out->addFloat("MaxStartSizeHeight", MaxStartSize.Height);
95 out->addInt("MinParticlesPerSecond", MinParticlesPerSecond);
96 out->addInt("MaxParticlesPerSecond", MaxParticlesPerSecond);
97 out->addColor("MinStartColor", MinStartColor);
98 out->addColor("MaxStartColor", MaxStartColor);
99 out->addInt("MinLifeTime", MinLifeTime);
100 out->addInt("MaxLifeTime", MaxLifeTime);
101 out->addInt("MaxAngleDegrees", MaxAngleDegrees);
102}
103
104//! Reads attributes of the object.
105void CParticlePointEmitter::deserializeAttributes(io::IAttributes* in, io::SAttributeReadWriteOptions* options)
106{
107 Direction = in->getAttributeAsVector3d("Direction");
108 if (Direction.getLength() == 0)
109 Direction.set(0,0.01f,0);
110
111 int idx = -1;
112 idx = in->findAttribute("MinStartSizeWidth");
113 if ( idx >= 0 )
114 MinStartSize.Width = in->getAttributeAsFloat(idx);
115 idx = in->findAttribute("MinStartSizeHeight");
116 if ( idx >= 0 )
117 MinStartSize.Height = in->getAttributeAsFloat(idx);
118 idx = in->findAttribute("MaxStartSizeWidth");
119 if ( idx >= 0 )
120 MaxStartSize.Width = in->getAttributeAsFloat(idx);
121 idx = in->findAttribute("MaxStartSizeHeight");
122 if ( idx >= 0 )
123 MaxStartSize.Height = in->getAttributeAsFloat(idx);
124
125 MinParticlesPerSecond = in->getAttributeAsInt("MinParticlesPerSecond");
126 MaxParticlesPerSecond = in->getAttributeAsInt("MaxParticlesPerSecond");
127
128 MinParticlesPerSecond = core::max_(1u, MinParticlesPerSecond);
129 MaxParticlesPerSecond = core::max_(MaxParticlesPerSecond, 1u);
130 MaxParticlesPerSecond = core::min_(MaxParticlesPerSecond, 200u);
131 MinParticlesPerSecond = core::min_(MinParticlesPerSecond, MaxParticlesPerSecond);
132
133 MinStartColor = in->getAttributeAsColor("MinStartColor");
134 MaxStartColor = in->getAttributeAsColor("MaxStartColor");
135 MinLifeTime = in->getAttributeAsInt("MinLifeTime");
136 MaxLifeTime = in->getAttributeAsInt("MaxLifeTime");
137 MaxAngleDegrees = in->getAttributeAsInt("MaxAngleDegrees");
138
139 MinLifeTime = core::max_(0u, MinLifeTime);
140 MaxLifeTime = core::max_(MaxLifeTime, MinLifeTime);
141 MinLifeTime = core::min_(MinLifeTime, MaxLifeTime);
142}
143
144
145} // end namespace scene
146} // end namespace irr
147
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