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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