// Initialise particle
void InitParticle(ref CCParticleGravity particleGrav, ref CCParticleBase particleBase)
{
InitParticleBase(ref particleBase);
// direction
float a = MathHelper.ToRadians(Angle + AngleVar * CCRandom.Float_Minus1_1());
if (EmitterMode == CCEmitterMode.Gravity)
{
CCPoint v = new CCPoint(CCMathHelper.Cos(a), CCMathHelper.Sin(a));
float s = GravityMode.Speed + GravityMode.SpeedVar * CCRandom.Float_Minus1_1();
particleGrav.Direction = v * s;
particleGrav.RadialAccel = GravityMode.RadialAccel + GravityMode.RadialAccelVar * CCRandom.Float_Minus1_1();
particleGrav.TangentialAccel = GravityMode.TangentialAccel + GravityMode.TangentialAccelVar * CCRandom.Float_Minus1_1();
if (GravityMode.RotationIsDir)
{
particleBase.Rotation = -MathHelper.ToDegrees(CCPoint.ToAngle(particleGrav.Direction));
}
}
}