[852] | 1 | #include ".\particleemitter.h"
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| 2 | #include <random.h>
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| 3 | #include <stdio.h>
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| 4 | #include <stdlib.h>
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| 5 | #include <fstream>
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| 6 | #ifdef WIN32
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| 7 | #include <windows.h>
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| 8 | #endif
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| 9 |
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| 10 | using namespace std;
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| 11 |
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| 12 | ParticleEmitter::ParticleEmitter(void)
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| 13 | {
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| 14 | m_Position=Vector(0,0,0);
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| 15 | m_Velocity=0.7;
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| 16 | m_TimeToLive=4000;
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| 17 | m_TTLvariation=2000;
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| 18 | m_Size=0.7;
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| 19 | m_EmissionRate=5;
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| 20 | m_Sizevariation=0.2;
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| 21 | m_isDirectionSet=false;
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| 22 | m_Direction=Vector(0,1,0);
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| 23 | m_Radius=0.7;
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| 24 | m_VelocityVariation=0.5;
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| 25 | m_Type=0;
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| 26 | m_Offset=0;
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| 27 | }
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| 28 |
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| 29 | ParticleEmitter::~ParticleEmitter(void)
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| 30 | {
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| 31 | }
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| 32 |
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| 33 | void ParticleEmitter::setPositionsFile(char* filename)
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| 34 | {
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| 35 | m_Type=1;
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| 36 |
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| 37 | ifstream file;
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| 38 |
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| 39 | file.open(filename);
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| 40 |
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| 41 | char in[50];
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| 42 | file>>in;//particlecount
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| 43 | unsigned int count;
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| 44 | file>>count;
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| 45 | m_ScriptPositionCount=count;
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| 46 | m_ScriptPositions=new Vector[count];
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| 47 | file>>in;
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| 48 | file>>in;
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| 49 |
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| 50 | for(unsigned int i=0;i<count;i++)
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| 51 | {
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| 52 | double pos;
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| 53 | file>>pos;
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| 54 | m_ScriptPositions[i].x=pos;
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| 55 | file>>pos;
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| 56 | m_ScriptPositions[i].y=pos;
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| 57 | file>>pos;
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| 58 | m_ScriptPositions[i].z=pos;
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| 59 | }
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| 60 |
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| 61 | file.close();
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| 62 |
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| 63 | }
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| 64 |
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| 65 | unsigned int ParticleEmitter::Emit(unsigned int Dt,unsigned int maxcount,Particle* particles,Vector CamPos)
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| 66 | {
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| 67 | //Dt= ms
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| 68 |
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| 69 | //how much to emit?
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| 70 | unsigned int toemit=Dt*m_EmissionRate/1000-m_EmittedInSecond;
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| 71 |
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| 72 | if(toemit>maxcount||m_EmissionRate==0)
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| 73 | {
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| 74 | toemit=maxcount;
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| 75 | }
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| 76 | //emit particles
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| 77 | m_EmittedInSecond+=toemit;
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| 78 |
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| 79 | Particle* thisParticle=particles;
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| 80 | /*
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| 81 | Halton Halton1(1,11);
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| 82 | Halton Halton2(1,23);
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| 83 | Halton Halton3(1,19);
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| 84 | */
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| 85 | for(unsigned int i=0;i<toemit;i++)
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| 86 | {
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| 87 | Particle* newParticle=new Particle;
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| 88 | //fill the properties
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| 89 |
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| 90 | //add direction
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| 91 |
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| 92 | //calculate random dir
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| 93 | /*
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| 94 | double angle1=RangeRandom(-M_PI,M_PI);
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| 95 | double angle2=RangeRandom(-M_PI,M_PI);
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| 96 |
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| 97 | Vector randpoint(cos(angle1)*cos(angle2),
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| 98 | sin(angle2),
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| 99 | sin(angle1)*cos(angle2));
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| 100 | */
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| 101 | /* Vector randpoint((double)Halton1.Random(),
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| 102 | (double)Halton2.Random(),
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| 103 | (double)Halton3.Random());
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| 104 | */
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| 105 | // randpoint.Normalize();
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| 106 | Vector randpoint(RangeRandom(-1,1),RangeRandom(-1,1),RangeRandom(-1,1));
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| 107 | // randpoint.Normalize();
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| 108 |
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| 109 |
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| 110 |
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| 111 | //set position
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| 112 | if(m_Type==0)
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| 113 | {
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| 114 | if(m_Radius==0)
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| 115 | {
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| 116 | newParticle->setPosition(m_Position);
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| 117 | }
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| 118 | else
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| 119 | {
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| 120 | randpoint.Normalize();
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| 121 | newParticle->setPosition(m_Position+randpoint*m_Radius*UnitRandom());
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| 122 | }
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| 123 | }
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| 124 | else//get particle from script positions
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| 125 | {
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| 126 | int randindex=(rand())%m_ScriptPositionCount;
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| 127 | newParticle->setPosition(m_Position+m_ScriptPositions[randindex]*m_Radius+randpoint*m_Offset);
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| 128 | randpoint.Normalize();
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| 129 | }
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| 130 |
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| 131 | if(m_VelocityVariation>1)m_VelocityVariation=1;
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| 132 | if(m_VelocityVariation<0)m_VelocityVariation=0;
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| 133 | double v=RangeRandom(-m_VelocityVariation,m_VelocityVariation);
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| 134 | double vel=m_Velocity+v*m_Velocity;
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| 135 |
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| 136 | if(m_isDirectionSet)
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| 137 | {
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| 138 | newParticle->setVelocity(m_Direction*vel);
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| 139 | }
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| 140 | else
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| 141 | {
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| 142 |
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| 143 | newParticle->setVelocity(randpoint*vel);
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| 144 |
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| 145 | }
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| 146 |
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| 147 | newParticle->m_Distance=(newParticle->getPosition()-CamPos).Length();
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| 148 |
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| 149 | //add time to live
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| 150 | unsigned int ttl;
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| 151 | if(m_TimeToLive!=0)
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| 152 | {
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| 153 | ttl=(unsigned int)RangeRandom(m_TimeToLive-m_TTLvariation,m_TimeToLive+m_TTLvariation);
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| 154 | newParticle->refrcol=true;
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| 155 | }
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| 156 | else
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| 157 | {
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| 158 | ttl=0;
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| 159 | }
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| 160 | newParticle->setTimetoLive(ttl);
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| 161 |
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| 162 | //set size
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| 163 | if(m_Sizevariation>1)m_Sizevariation=1;
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| 164 | if(m_Sizevariation<0)m_Sizevariation=0;
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| 165 | double s=RangeRandom(-m_Sizevariation,m_Sizevariation);
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| 166 | double siz=m_Size+s*m_Size;
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| 167 | //newParticle->setSize(siz);
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| 168 | newParticle->setSize(RangeRandom(m_Size-m_Sizevariation*m_Size,m_Size+m_Sizevariation*m_Size));
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| 169 |
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| 170 | newParticle->Refresh(0);
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| 171 |
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| 172 | thisParticle->m_NextParticle=newParticle;
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| 173 | thisParticle=thisParticle->m_NextParticle;
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| 174 | }
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| 175 |
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| 176 | if(Dt>1000)
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| 177 | {
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| 178 | //new second begins
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| 179 | m_EmittedInSecond=0;
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| 180 | }
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| 181 |
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| 182 | return toemit;
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| 183 | } |
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