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improved particle emitters

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This commit is contained in:
devZoGok
2021-10-19 19:06:40 +03:00
parent d9f9b0c282
commit 7e1575d690
17 changed files with 295 additions and 51 deletions
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particleEmitter.cpp
+13 -5
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@@ -79,7 +79,7 @@ namespace vb01{
float fov=cam->getFov(),width=root->getWidth(),height=root->getHeight();
float nearPlane=cam->getNearPlane(),farPlane=cam->getFarPlane();
Vector3 pos=node->getPosition();
Vector3 camDir=cam->getDirection(),up=cam->getUp(),camPos=cam->getPosition();
Vector3 camDir=cam->getDirection(),up=cam->getUp(),left=cam->getLeft(),camPos=cam->getPosition();
mat4 view=lookAt(vec3(camPos.x,camPos.y,camPos.z),vec3(camPos.x+camDir.x,camPos.y+camDir.y,camPos.z+camDir.z),vec3(up.x,up.y,up.z));
mat4 proj=perspective(radians(fov),width/height,nearPlane,farPlane);
@@ -94,12 +94,14 @@ namespace vb01{
if(getTime()-particles[i].time>=particles[i].timeToLive){
particles[i].time=getTime();
float factor=(float)(rand()%100)/100;
float spreadX=(float)(rand()%360)/180*PI,spreadY=(float)(rand()%360)/180*PI;
dir=Vector3(cos(abs(spreadX)>spread?spread:spreadX),sin(abs(spreadY)>spread?spread:spreadY),0);
float s1=float(rand()%(int)spread)/180*PI,s2=float(rand()%360)/180*PI;
Vector3 ra1=(Vector3(0,1,0).cross(dir)).norm(),ra2=dir.norm();
dir=Quaternion(s1,ra1)*dir;
dir=Quaternion(s2,ra2)*dir;
particles[i].timeToLive=s64(1000*((highLife-lowLife)*factor+lowLife));
particles[i].mat=translate(mat4(1.f),vec3(dir.x,dir.y,dir.z));
particles[i].mat=mat4(1.f);
}
dir=dir.norm()*direction.getLengthSq();
particles[i].dir=dir.norm()*direction.getLengthSq();
float lifePercentage=(float)(getTime()-particles[i].time)/particles[i].timeToLive;
particles[i].color=startColor+(endColor-startColor)*lifePercentage;
particles[i].size=startSize+(endSize-startSize)*lifePercentage;
@@ -127,4 +129,10 @@ namespace vb01{
glBindVertexArray(VAO);
glDrawElementsInstanced(GL_TRIANGLES,6,GL_UNSIGNED_INT,0,numParticles);
}
void ParticleEmitter::setDirection(Vector3 dir){
this->direction=dir;
for(int i=0;i<numParticles;i++)
particles[i].dir=dir;
}
}