[852] | 1 | #include ".\particlesystem.h"
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| 2 | #include "includes.h"
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| 3 | #include <GL/glext.h>
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| 4 | #include <glh/glh_extensions.h>
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| 5 |
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| 6 | int CompareInc( const void *arg1, const void *arg2 )
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| 7 | {
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| 8 | Particle* particle1=(Particle*) arg1;
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| 9 | Particle* particle2=(Particle*) arg2;
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| 10 |
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| 11 | if(*particle1>*particle2)
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| 12 | return -1;
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| 13 | else
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| 14 | return 1;
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| 15 | }
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| 16 |
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| 17 | int CompareDec( const void *arg1, const void *arg2 )
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| 18 | {
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| 19 | Particle* particle1=(Particle*) arg1;
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| 20 | Particle* particle2=(Particle*) arg2;
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| 21 |
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| 22 | if(*particle1>*particle2)
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| 23 | return 1;
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| 24 | else
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| 25 | return -1;
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| 26 | }
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| 27 |
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| 28 |
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| 29 | void ParticleSystem::SortParticles(bool increment)
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| 30 | {
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| 31 | if(increment)
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| 32 | qsort( m_ParticleArray, (size_t)m_Count, sizeof(Particle), CompareInc );
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| 33 | else
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| 34 | qsort( m_ParticleArray, (size_t)m_Count, sizeof(Particle), CompareDec );
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| 35 | }
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| 36 |
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| 37 |
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| 38 | ParticleSystem::ParticleSystem(void)
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| 39 | {
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| 40 | VertexBuffer=NULL;
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| 41 | TexcoordBuffer=NULL;
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| 42 | ColorBuffer=NULL;
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| 43 |
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| 44 | m_LastParticle=NULL;
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| 45 | m_ParticleList=new Particle;
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| 46 |
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| 47 | m_ParticleArray=NULL;
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| 48 |
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| 49 | m_Count=0;
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| 50 | m_Quota=100;
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| 51 | m_Type=0;
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| 52 |
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| 53 | m_UpVector=Vector(0,1,0);
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| 54 | m_RightVector=Vector(1,0,0);
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| 55 |
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| 56 | m_refreshed=false;
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| 57 | m_refreshonce=false;
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| 58 |
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| 59 | m_LittleSystemRadius=1.0;
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| 60 | }
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| 61 |
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| 62 | ParticleSystem::~ParticleSystem(void)
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| 63 | {
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| 64 | }
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| 65 |
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| 66 | void ParticleSystem::RefreshParticles(unsigned int Dt,unsigned int TimefromSecond)
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| 67 | {
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| 68 | if(!m_refreshed)
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| 69 | {
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| 70 | //Refresh particle ages, kill dead particles; refresh particle positions
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| 71 | Particle* thisParticle=m_ParticleList->m_NextParticle;
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| 72 | Particle* parentParticle=m_ParticleList;
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| 73 |
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| 74 | while(thisParticle)
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| 75 | {
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| 76 | if(thisParticle->LiveMore(Dt))
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| 77 | {
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| 78 | //refresh particle
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| 79 | thisParticle->Refresh(Dt);
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| 80 | //thisParticle->m_Distance=(thisParticle->getPosition()-m_CameraPosition).Length();
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| 81 | m_LastParticle=thisParticle;
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| 82 | parentParticle=thisParticle;
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| 83 | thisParticle=thisParticle->m_NextParticle;
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| 84 | }
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| 85 | else
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| 86 | {
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| 87 | //kill particle
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| 88 | parentParticle->m_NextParticle=thisParticle->m_NextParticle;
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| 89 | delete thisParticle;
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| 90 | thisParticle=parentParticle->m_NextParticle;
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| 91 | m_LastParticle=parentParticle;
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| 92 | m_Count--;
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| 93 | }
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| 94 |
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| 95 | }
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| 96 |
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| 97 | //Ask emitter to add new particles
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| 98 | Particle* Addto=m_LastParticle;
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| 99 | if(Addto==NULL)Addto=m_ParticleList;
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| 100 | unsigned int AddedCount=m_Emitter.Emit(TimefromSecond,m_Quota-m_Count,Addto,m_CameraPosition);
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| 101 | m_Count+=AddedCount;
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| 102 |
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| 103 | //fill array ;update bounding radius
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| 104 | delete[] m_ParticleArray;
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| 105 | m_ParticleArray=new Particle[m_Count];
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| 106 |
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| 107 | //RefrBRadius_Dist();
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| 108 |
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| 109 |
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| 110 |
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| 111 | }
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| 112 | }
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| 113 |
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| 114 | void ParticleSystem::RefrBRadius_Dist(bool refresh_rad)
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| 115 | {
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| 116 | Particle* thisParticle=m_ParticleList->m_NextParticle;
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| 117 | if(refresh_rad||!m_refreshed)m_BoundingRadius=0;
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| 118 | double dist;
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| 119 | for(unsigned int i=0;i<m_Count;i++)
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| 120 | {
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| 121 | thisParticle->m_Distance=(thisParticle->getPosition()-m_CameraPosition).Length();
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| 122 | thisParticle->m_ID=i;
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| 123 |
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| 124 | double oldSize;
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| 125 | if(refresh_rad||!m_refreshed)
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| 126 | {
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| 127 | if(m_refreshonce)
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| 128 | m_refreshed=true;
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| 129 |
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| 130 | oldSize=thisParticle->getSize();
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| 131 | thisParticle->setSize(oldSize*m_LittleSystemRadius);
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| 132 | dist=thisParticle->getPosition().Length()+thisParticle->getSize();
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| 133 | if(dist>m_BoundingRadius)
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| 134 | m_BoundingRadius=dist;
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| 135 | }
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| 136 | m_ParticleArray[i]=*thisParticle;
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| 137 |
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| 138 | if(refresh_rad||!m_refreshed)thisParticle->setSize(oldSize);
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| 139 | thisParticle=thisParticle->m_NextParticle;
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| 140 | }
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| 141 | }
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| 142 |
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| 143 | void ParticleSystem::RefreshBuffer(bool billboard)
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| 144 | {
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| 145 |
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| 146 | if(VertexBuffer!=NULL)delete VertexBuffer;
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| 147 | if(TexcoordBuffer!=NULL)delete TexcoordBuffer;
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| 148 | if(ColorBuffer!=NULL)delete ColorBuffer;
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| 149 |
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| 150 | if(billboard)
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| 151 | {
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| 152 | double x,y,z;
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| 153 | Vector LeftDown=m_UpVector*-1-m_RightVector;
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| 154 | Vector RightDown=m_UpVector*-1+m_RightVector;
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| 155 | Vector RightUp=m_UpVector+m_RightVector;
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| 156 | Vector LeftUp=m_UpVector-m_RightVector;
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| 157 |
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| 158 | VertexBuffer=new float[12*m_Count];
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| 159 | ColorBuffer=new float[16*m_Count];
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| 160 | TexcoordBuffer=new float[16*m_Count];
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| 161 |
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| 162 | for(unsigned int i=0;i<m_Count;i++)
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| 163 | {
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| 164 | m_ParticleArray[i].getPosition(x,y,z);
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| 165 |
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| 166 | float bbsize=2*m_ParticleArray[i].getSize();
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| 167 | float t=m_ParticleArray[i].getSize()/m_BoundingRadius;
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| 168 |
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| 169 | TexcoordBuffer[i*16]=0;TexcoordBuffer[i*16+1]=0;
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| 170 | TexcoordBuffer[i*16+2]=bbsize;TexcoordBuffer[i*16+3]=t;
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| 171 | TexcoordBuffer[i*16+4]=1;TexcoordBuffer[i*16+5]=0;
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| 172 | TexcoordBuffer[i*16+6]=bbsize;TexcoordBuffer[i*16+7]=t;
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| 173 | TexcoordBuffer[i*16+8]=1;TexcoordBuffer[i*16+9]=1;
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| 174 | TexcoordBuffer[i*16+10]=bbsize;TexcoordBuffer[i*16+11]=t;
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| 175 | TexcoordBuffer[i*16+12]=0;TexcoordBuffer[i*16+13]=1;
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| 176 | TexcoordBuffer[i*16+14]=bbsize;TexcoordBuffer[i*16+15]=t;
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| 177 |
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| 178 |
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| 179 | ColorBuffer[i*16]=m_ParticleArray[i].m_Color.x;ColorBuffer[i*16+1]=m_ParticleArray[i].m_Color.y;
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| 180 | ColorBuffer[i*16+2]=m_ParticleArray[i].m_Color.z;ColorBuffer[i*16+3]=m_ParticleArray[i].m_Color.w;
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| 181 |
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| 182 | ColorBuffer[i*16+4]=m_ParticleArray[i].m_Color.x;ColorBuffer[i*16+5]=m_ParticleArray[i].m_Color.y;
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| 183 | ColorBuffer[i*16+6]=m_ParticleArray[i].m_Color.z;ColorBuffer[i*16+7]=m_ParticleArray[i].m_Color.w;
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| 184 |
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| 185 | ColorBuffer[i*16+8]=m_ParticleArray[i].m_Color.x;ColorBuffer[i*16+9]=m_ParticleArray[i].m_Color.y;
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| 186 | ColorBuffer[i*16+10]=m_ParticleArray[i].m_Color.z;ColorBuffer[i*16+11]=m_ParticleArray[i].m_Color.w;
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| 187 |
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| 188 | ColorBuffer[i*16+12]=m_ParticleArray[i].m_Color.x;ColorBuffer[i*16+13]=m_ParticleArray[i].m_Color.y;
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| 189 | ColorBuffer[i*16+14]=m_ParticleArray[i].m_Color.z;ColorBuffer[i*16+15]=m_ParticleArray[i].m_Color.w;
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| 190 |
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| 191 | VertexBuffer[i*12]=x+LeftDown.x*m_ParticleArray[i].getSize();
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| 192 | VertexBuffer[i*12+1]=y+LeftDown.y*m_ParticleArray[i].getSize();
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| 193 | VertexBuffer[i*12+2]=z+LeftDown.z*m_ParticleArray[i].getSize();
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| 194 | VertexBuffer[i*12+3]=x+RightDown.x*m_ParticleArray[i].getSize();
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| 195 | VertexBuffer[i*12+4]=y+RightDown.y*m_ParticleArray[i].getSize();
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| 196 | VertexBuffer[i*12+5]=z+RightDown.z*m_ParticleArray[i].getSize();
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| 197 | VertexBuffer[i*12+6]=x+RightUp.x*m_ParticleArray[i].getSize();
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| 198 | VertexBuffer[i*12+7]=y+RightUp.y*m_ParticleArray[i].getSize();
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| 199 | VertexBuffer[i*12+8]=z+RightUp.z*m_ParticleArray[i].getSize();
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| 200 | VertexBuffer[i*12+9]=x+LeftUp.x*m_ParticleArray[i].getSize();
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| 201 | VertexBuffer[i*12+10]=y+LeftUp.y*m_ParticleArray[i].getSize();
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| 202 | VertexBuffer[i*12+11]=z+LeftUp.z*m_ParticleArray[i].getSize();
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| 203 |
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| 204 | }
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| 205 | }
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| 206 | else
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| 207 | {
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| 208 | double x,y,z;
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| 209 |
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| 210 | if(VertexBuffer==NULL)VertexBuffer=new float[3*m_Count];
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| 211 | if(ColorBuffer==NULL)ColorBuffer=new float[4*m_Count];
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| 212 | if(TexcoordBuffer==NULL)TexcoordBuffer=new float[m_Count*2];
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| 213 |
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| 214 | for(unsigned int i=0;i<m_Count;i++)
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| 215 | {
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| 216 | m_ParticleArray[i].getPosition(x,y,z);
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| 217 |
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| 218 | ColorBuffer[i*4]=m_ParticleArray[i].m_Color.y;
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| 219 | ColorBuffer[4*i+1]=m_ParticleArray[i].m_Color.y;
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| 220 | ColorBuffer[4*i+2]=m_ParticleArray[i].m_Color.z;
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| 221 | ColorBuffer[4*i+3]=m_ParticleArray[i].m_Color.w;
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| 222 |
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| 223 | VertexBuffer[i*3]=x;
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| 224 | VertexBuffer[i*3+1]=y;
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| 225 | VertexBuffer[i*3+2]=z;
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| 226 |
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| 227 | TexcoordBuffer[2*i]=m_ParticleArray[i].m_ID;
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| 228 | TexcoordBuffer[2*i+1]=m_ParticleArray[i].getSize();
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| 229 |
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| 230 | }
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| 231 |
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| 232 | }
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| 233 | }
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| 234 |
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| 235 | void ParticleSystem::RenderAsPoints(bool sprites)
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| 236 | {
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| 237 |
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| 238 | glEnableClientState(GL_VERTEX_ARRAY);
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| 239 | glEnableClientState(GL_TEXTURE_COORD_ARRAY);
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| 240 | glEnableClientState(GL_COLOR_ARRAY);
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| 241 |
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| 242 | glVertexPointer (3, GL_FLOAT, 0, VertexBuffer);
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| 243 | glColorPointer(4,GL_FLOAT,0,ColorBuffer);
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| 244 | glTexCoordPointer(2,GL_FLOAT,0,TexcoordBuffer);
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| 245 |
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| 246 | if(sprites)
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| 247 | {
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| 248 | glEnable(GL_POINT_SPRITE_ARB);
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| 249 | glTexEnvi(GL_POINT_SPRITE_ARB, GL_COORD_REPLACE_ARB, GL_TRUE);
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| 250 | glEnable(GL_VERTEX_PROGRAM_POINT_SIZE_NV);
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| 251 |
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| 252 | }
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| 253 |
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| 254 | glDrawArrays(GL_POINTS, 0, m_Count);
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| 255 |
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| 256 | if(sprites)
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| 257 | {
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| 258 | glDisable(GL_POINT_SPRITE_ARB);
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| 259 | glDisable(GL_VERTEX_PROGRAM_POINT_SIZE_NV);
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| 260 | glTexEnvi(GL_POINT_SPRITE_ARB, GL_COORD_REPLACE_ARB, GL_FALSE);
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| 261 | }
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| 262 |
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| 263 | glDisableClientState( GL_VERTEX_ARRAY ); // Disable Vertex Arrays
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| 264 | glDisableClientState( GL_TEXTURE_COORD_ARRAY );
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| 265 | glDisableClientState( GL_COLOR_ARRAY );
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| 266 |
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| 267 | }
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| 268 |
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| 269 | void ParticleSystem::RenderAsBillboard()
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| 270 | {
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| 271 |
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| 272 | glEnableClientState(GL_VERTEX_ARRAY);
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| 273 | glEnableClientState(GL_TEXTURE_COORD_ARRAY);
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| 274 | glEnableClientState(GL_COLOR_ARRAY);
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| 275 |
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| 276 | glVertexPointer (3, GL_FLOAT, 0, VertexBuffer);
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| 277 | glTexCoordPointer(4,GL_FLOAT,0,TexcoordBuffer);
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| 278 | glColorPointer(4,GL_FLOAT,0,ColorBuffer);
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| 279 |
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| 280 | glDrawArrays(GL_QUADS, 0, m_Count*4);
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| 281 |
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| 282 | glDisableClientState( GL_VERTEX_ARRAY ); // Disable Vertex Arrays
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| 283 | glDisableClientState( GL_TEXTURE_COORD_ARRAY );
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| 284 | glDisableClientState( GL_COLOR_ARRAY );
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| 285 |
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| 286 |
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| 287 | }
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| 288 |
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