private static byte GetParticleColorComponent(ParticleStateField stateField,
PartSysParamId paramId,
PartSysEmitter emitter,
int particleIdx)
{
var colorParam = emitter.GetParamState(paramId);
byte value;
if (colorParam != null)
{
var partAge = emitter.GetParticleAge(particleIdx);
var partColor = colorParam.GetValue(emitter, particleIdx, partAge);
partColor += emitter.GetParticleState().GetState(stateField, particleIdx);
if (partColor >= 255)
{
value = 255;
}
else if (partColor < 0)
{
value = 0;
}
else
{
value = (byte)partColor;
}
}
else
{
value =
(byte)emitter.GetParticleState().GetState(stateField, particleIdx);
}
return(value);
}
private static void SetParticleParam(PartSysEmitter emitter, int particleIdx, PartSysParamId id,
float atLifetime, ParticleStateField stateField, float defaultValue)
{
var value = GetParticleValue(emitter, particleIdx, id, atLifetime, defaultValue);
emitter.GetParticleState().SetState(stateField, particleIdx, value);
}
public ref float GetStatePtr(ParticleStateField field, int particleIdx)
{
return(ref _memory.Span[_capacity * (int)field + particleIdx]);
}
public float GetState(ParticleStateField field, int particleIdx)
{
return(GetStatePtr(field, particleIdx));
}
public void SetState(ParticleStateField field, int particleIdx, float value)
{
GetStatePtr(field, particleIdx) = value;
}