Pnt3f LineParticleSystemDrawer::getLineEndpoint(ParticleSystemUnrecPtr System,
UInt32 Index) const
{
Vec3f Direction;
//Calculate Direction
switch(getLineDirectionSource())
{
case DIRECTION_POSITION_CHANGE:
Direction = System->getPositionChange(Index);
break;
case DIRECTION_VELOCITY_CHANGE:
Direction = System->getVelocityChange(Index);
break;
case DIRECTION_VELOCITY:
Direction = System->getVelocity(Index);
break;
case DIRECTION_ACCELERATION:
Direction = System->getAcceleration(Index);
break;
case DIRECTION_STATIC:
Direction = getLineDirection();
break;
case DIRECTION_NORMAL:
default:
Direction = System->getNormal(Index);
break;
}
//Calculate Length
Real32 LineLength;
switch(getLineLengthSource())
{
case LENGTH_SIZE_X:
LineLength = System->getSize(Index).x();
break;
case LENGTH_SIZE_Y:
LineLength = System->getSize(Index).y();
break;
case LENGTH_SIZE_Z:
LineLength = System->getSize(Index).z();
break;
case LENGTH_SPEED:
LineLength = System->getVelocity(Index).length();
break;
case LENGTH_ACCELERATION:
LineLength = System->getAcceleration(Index).length();
break;
case LENGTH_STATIC:
default:
LineLength = getLineLength(); ///could not find anything, line length field
break;
}
LineLength *= getLineLengthScaling();
return System->getPosition(Index)+(LineLength*Direction);
}
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;
}
void QuadParticleSystemDrawer::getQuadWidthHeight(ParticleSystemUnrecPtr System, UInt32 Index, Real32& Width, Real32& Height)
{
Width = System->getSize(Index).x();
Height = System->getSize(Index).y();
}