Vec3f QuadParticleSystemDrawer::getQuadNormal(DrawEnv *pEnv, ParticleSystemUnrecPtr System, UInt32 Index)
{
Vec3f Direction;
switch(getNormalSource())
{
case NORMAL_POSITION_CHANGE:
Direction = System->getPositionChange(Index);
Direction.normalize();
break;
case NORMAL_VELOCITY_CHANGE:
Direction = System->getVelocityChange(Index);
Direction.normalize();
break;
case NORMAL_VELOCITY:
Direction = System->getVelocity(Index);
Direction.normalize();
break;
case NORMAL_ACCELERATION:
Direction = System->getAcceleration(Index);
Direction.normalize();
break;
case NORMAL_PARTICLE_NORMAL:
Direction = System->getNormal(Index);
break;
case NORMAL_VIEW_POSITION:
{
//TODO: make this more efficient
Matrix ModelView(pEnv->getCameraViewing());
Pnt3f Position(ModelView[0][3],ModelView[1][3],ModelView[2][3]);
Direction = Position - System->getPosition(Index);
Direction.normalize();
break;
}
case NORMAL_STATIC:
Direction = getNormal();
break;
case NORMAL_VIEW_DIRECTION:
default:
{
Matrix ModelView(pEnv->getCameraViewing());
ModelView.mult(pEnv->getObjectToWorld());
Direction.setValues(ModelView[0][2],ModelView[1][2],ModelView[2][2]);
break;
}
}
return Direction;
}
Vec3f QuadParticleSystemDrawer::getQuadNormal(DrawEnv *pEnv,
ParticleSystemUnrecPtr System,
UInt32 Index,
const Matrix& CameraToObject )
{
Vec3f Direction;
switch(getNormalSource())
{
case NORMAL_POSITION_CHANGE:
Direction = System->getPositionChange(Index);
Direction.normalize();
break;
case NORMAL_VELOCITY_CHANGE:
Direction = System->getVelocityChange(Index);
Direction.normalize();
break;
case NORMAL_VELOCITY:
Direction = System->getVelocity(Index);
Direction.normalize();
break;
case NORMAL_ACCELERATION:
Direction = System->getAcceleration(Index);
Direction.normalize();
break;
case NORMAL_PARTICLE_NORMAL:
Direction = System->getNormal(Index);
break;
case NORMAL_VIEW_POSITION:
{
Direction = Pnt3f(CameraToObject[3][0],CameraToObject[3][1],CameraToObject[3][2]) - System->getPosition(Index);
Direction.normalize();
break;
}
case NORMAL_STATIC:
Direction = getNormal();
break;
case NORMAL_VIEW_DIRECTION:
default:
{
Direction.setValues(CameraToObject[2][0],CameraToObject[2][1],CameraToObject[2][2]);
break;
}
}
return Direction;
}
