void InitParticleBase(ref CCParticleBase particleBase)
{
float timeToLive = Math.Max(0, Life + LifeVar * CCRandom.Float_Minus1_1());
particleBase.TimeToLive = timeToLive;
CCPoint particlePos;
particlePos.X = SourcePosition.X + PositionVar.X * CCRandom.Float_Minus1_1();
particlePos.Y = SourcePosition.Y + PositionVar.Y * CCRandom.Float_Minus1_1();
particleBase.Position = particlePos;
CCColor4F start = new CCColor4F();
start.R = MathHelper.Clamp(StartColor.R + StartColorVar.R * CCRandom.Float_Minus1_1(), 0, 1);
start.G = MathHelper.Clamp(StartColor.G + StartColorVar.G * CCRandom.Float_Minus1_1(), 0, 1);
start.B = MathHelper.Clamp(StartColor.B + StartColorVar.B * CCRandom.Float_Minus1_1(), 0, 1);
start.A = MathHelper.Clamp(StartColor.A + StartColorVar.A * CCRandom.Float_Minus1_1(), 0, 1);
particleBase.Color = start;
CCColor4F end = new CCColor4F();
end.R = MathHelper.Clamp(EndColor.R + EndColorVar.R * CCRandom.Float_Minus1_1(), 0, 1);
end.G = MathHelper.Clamp(EndColor.G + EndColorVar.G * CCRandom.Float_Minus1_1(), 0, 1);
end.B = MathHelper.Clamp(EndColor.B + EndColorVar.B * CCRandom.Float_Minus1_1(), 0, 1);
end.A = MathHelper.Clamp(EndColor.A + EndColorVar.A * CCRandom.Float_Minus1_1(), 0, 1);
CCColor4F deltaColor = new CCColor4F();
deltaColor.R = (end.R - start.R) / timeToLive;
deltaColor.G = (end.G - start.G) / timeToLive;
deltaColor.B = (end.B - start.B) / timeToLive;
deltaColor.A = (end.A - start.A) / timeToLive;
particleBase.DeltaColor = deltaColor;
float startSize = Math.Max(0, StartSize + StartSizeVar * CCRandom.Float_Minus1_1());
particleBase.Size = startSize;
if (EndSize == ParticleStartSizeEqualToEndSize)
{
particleBase.DeltaSize = 0;
}
else
{
float endS = EndSize + EndSizeVar * CCRandom.Float_Minus1_1();
endS = Math.Max(0, endS);
particleBase.DeltaSize = (endS - startSize) / timeToLive;
}
float startSpin = StartSpin + StartSpinVar * CCRandom.Float_Minus1_1();
float endSpin = EndSpin + EndSpinVar * CCRandom.Float_Minus1_1();
particleBase.Rotation = startSpin;
particleBase.DeltaRotation = (endSpin - startSpin) / timeToLive;
particleBase.StartPosition = Position;
}
void InitParticle(ref CCParticleRadial particleRadial, ref CCParticleBase particleBase)
{
InitParticleBase(ref particleBase);
// direction
float a = MathHelper.ToRadians(Angle + AngleVar * CCRandom.Float_Minus1_1());
// Set the default diameter of the particle from the source position
float startRadius = RadialMode.StartRadius + RadialMode.StartRadiusVar * CCRandom.Float_Minus1_1();
float endRadius = RadialMode.EndRadius + RadialMode.EndRadiusVar * CCRandom.Float_Minus1_1();
particleRadial.Radius = startRadius;
particleRadial.DeltaRadius = (RadialMode.EndRadius == ParticleStartRadiusEqualToEndRadius) ?
0 : (endRadius - startRadius) / particleBase.TimeToLive;
particleRadial.Angle = a;
particleRadial.DegreesPerSecond =
MathHelper.ToRadians(RadialMode.RotatePerSecond + RadialMode.RotatePerSecondVar * CCRandom.Float_Minus1_1());
}
// 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));
}
}
}
