public Vector2 GetNewEmissionPoint()
{
Vector2 emissionPointOffset = Vector2.Zero;
switch (type)
{
case EmitterShapeType.Rectangle:
emissionPointOffset.X = Randomizer.Float(-size.X / 2.0f, size.X / 2.0f);
emissionPointOffset.Y = Randomizer.Float(-size.Y / 2.0f, size.Y / 2.0f);
break;
case EmitterShapeType.Circle:
Vector2 radius = new Vector2(Randomizer.Float(0f, size.X), Randomizer.Float(0f, size.Y));
float angle = Randomizer.AngleInRadians();
emissionPointOffset.X = radius.X * IceMath.CosFromRadians(angle);
emissionPointOffset.Y = radius.Y * IceMath.SinFromRadians(angle);
break;
case EmitterShapeType.CircleOutline:
float angle2 = Randomizer.AngleInRadians();
emissionPointOffset.X = size.X * IceMath.CosFromRadians(angle2);
emissionPointOffset.Y = size.Y * IceMath.SinFromRadians(angle2);
break;
case EmitterShapeType.TextureMask:
// choose an array index at random
if (maskPoints.Length > 0)
{
int arrayIndex = Randomizer.Integer(0, maskPoints.Length - 1);
emissionPointOffset = maskPoints[arrayIndex];
}
break;
default:
break;
}
return(emissionPointOffset + offset + position);
}