Action::ResultE QuadParticleSystemDrawer::draw(DrawEnv *pEnv, ParticleSystemUnrecPtr System, const MFUInt32& Sort)
{
bool isSorted(Sort.size() > 0);
UInt32 NumParticles;
if(isSorted)
{
NumParticles = Sort.size();
}
else
{
NumParticles = System->getNumParticles();
}
Pnt3f P1,P2,P3,P4;
UInt32 Index;
//Calculate the CameraToObject basis
Matrix WorldToObject(pEnv->getObjectToWorld());
WorldToObject.invert();
Matrix CameraToObject(pEnv->getCameraToWorld());
CameraToObject.mult(WorldToObject);
glBegin(GL_QUADS);
for(UInt32 i(0); i<NumParticles;++i)
{
if(isSorted)
{
Index = Sort[i];
}
else
{
Index = i;
}
//Loop through all particles
//Get The Normal of the Particle
Vec3f Normal = getQuadNormal(pEnv, System, Index, CameraToObject);
//Calculate the Binormal as the cross between Normal and Up
Vec3f Binormal = getQuadUpDir(pEnv, System, Index, CameraToObject).cross(Normal);
//Get the Up Direction of the Particle
Vec3f Up = Normal.cross(Binormal);
//Determine Local Space of the Particle
//This is where error occurs
Pnt3f Position = System->getPosition(Index);
//Determine the Width and Height of the quad
Real32 Width = System->getSize(Index).x()*getQuadSizeScaling().x(),Height =System->getSize(Index).y()*getQuadSizeScaling().y();
//Calculate Quads positions
P1 = Position + (Width/2.0f)*Binormal + (Height/2.0f)*Up;
P2 = Position + (Width/2.0f)*Binormal - (Height/2.0f)*Up;
P3 = Position - (Width/2.0f)*Binormal - (Height/2.0f)*Up;
P4 = Position - (Width/2.0f)*Binormal + (Height/2.0f)*Up;
//Draw the Quad
glNormal3fv(Normal.getValues());
glColor4fv(System->getColor(Index).getValuesRGBA());
glTexCoord2f(1.0, 1.0);
glVertex3fv(P1.getValues());
glTexCoord2f(0.0, 1.0);
glVertex3fv(P4.getValues());
glTexCoord2f(0.0, 0.0);
glVertex3fv(P3.getValues());
glTexCoord2f(1.0, 0.0);
glVertex3fv(P2.getValues());
}
glColor4f(1.0f,1.0f,1.0f,1.0f);
glEnd();
//Generate a local space for the particle
return Action::Continue;
}
Action::ResultE LineParticleSystemDrawer::draw(DrawEnv *pEnv,
ParticleSystemUnrecPtr System,
const MFUInt32& Sort)
{
UInt32 NumParticles(System->getNumParticles());
bool areEndpointsFadeSame(getEndPointFading().x() == getEndPointFading().y());
Color4f Color;
if(NumParticles != 0)
{
bool SeparateColors(System->getNumColors() > 1);
bool SeparateSizes(System->getNumSizes() > 1);
bool SeparateNormals(System->getNumNormals() > 1);
glBegin(GL_LINES);
//Colors
if(!SeparateColors && areEndpointsFadeSame)
{
Color = System->getColor(0);
glColor4f(Color.red(), Color.green(), Color.blue(), Color.alpha() * getEndPointFading().x());
}
//Sizes
if(!SeparateSizes)
{
//glColor4fv(System->getColor(0).getValuesRGBA());
}
//Normals
if(!SeparateNormals)
{
glNormal3fv(System->getNormal(0).getValues());
}
for(UInt32 i(0) ; i<NumParticles ; ++i)
{
//Start Color
if(SeparateColors)
{
Color = System->getColor(i);
glColor4f(Color.red(), Color.green(), Color.blue(), Color.alpha() * getEndPointFading().x());
}
else if(!SeparateColors && !areEndpointsFadeSame)
{
Color = System->getColor(0);
glColor4f(Color.red(), Color.green(), Color.blue(), Color.alpha() * getEndPointFading().x());
}
//Sizes
if(SeparateSizes)
{
//glColor4fv(System->getColor(i).getValuesRGBA());
}
//Normals
if(SeparateNormals)
{
glNormal3fv(System->getNormal(i).getValues());
}
//Positions
glVertex3fv(System->getPosition(i).getValues());
//End Color
if(SeparateColors && !areEndpointsFadeSame)
{
Color = System->getColor(i);
glColor4f(Color.red(), Color.green(), Color.blue(), Color.alpha() * getEndPointFading().y());
}
else if(!SeparateColors && !areEndpointsFadeSame)
{
Color = System->getColor(0);
glColor4f(Color.red(), Color.green(), Color.blue(), Color.alpha() * getEndPointFading().y());
}
glVertex3fv(getLineEndpoint(System, i).getValues());
}
glEnd();
}
return Action::Continue;
}
