/// <summary>
/// Sets the alpha range of this particle type.
/// </summary>
/// <param name="start">The starting alpha.</param>
/// <param name="finish">The finish alpha.</param>
/// <param name="ease">Optional easer function.</param>
/// <returns>This ParticleType object.</returns>
public ParticleType SetAlpha(float start = 1, float finish = 0, Emitter.Easer ease = null)
{
start = start < 0 ? 0 : (start > 1 ? 1 : start);
finish = finish < 0 ? 0 : (finish > 1 ? 1 : finish);
_alpha = start;
_alphaRange = finish - start;
_alphaEase = ease;
return(this);
}
/// <summary>
/// Defines the motion range for this particle type based on the vector.
/// </summary>
/// <param name="x">X distance to move.</param>
/// <param name="y">Y distance to move.</param>
/// <param name="duration">Particle duration.</param>
/// <param name="durationRange">Random amount to add to the particle's duration.</param>
/// <param name="ease">Optional easer function.</param>
/// <returns>This ParticleType object.</returns>
public ParticleType SetMotionVector(float x, float y, float duration, float durationRange = 0, Emitter.Easer ease = null)
{
_angle = (float)Math.Atan2(y, x);
_angleRange = 0;
_duration = duration;
_durationRange = durationRange;
_ease = ease;
return(this);
}
/// <summary>
/// Defines the motion range for this particle type.
/// </summary>
/// <param name="angle">Launch Direction.</param>
/// <param name="distance">Distance to travel.</param>
/// <param name="duration">Particle duration.</param>
/// <param name="angleRange">Random amount to add to the particle's direction.</param>
/// <param name="distanceRange">Random amount to add to the particle's distance.</param>
/// <param name="durationRange">Random amount to add to the particle's duration.</param>
/// <param name="ease">Optional easer function.</param>
/// <returns>This ParticleType object.</returns>
public ParticleType SetMotion(float angle, float distance, float duration, float angleRange = 0, float distanceRange = 0, float durationRange = 0, Emitter.Easer ease = null)
{
_angle = angle * FP.RAD;
_distance = distance;
_duration = duration;
_angleRange = angleRange * FP.RAD;
_distanceRange = distanceRange;
_durationRange = durationRange;
_ease = ease;
return(this);
}
/// <summary>
/// Sets the color range of this particle type.
/// </summary>
/// <param name="start">The starting color.</param>
/// <param name="finish">The finish color.</param>
/// <param name="ease">Optional easer function.</param>
/// <returns>This ParticleType object.</returns>
public ParticleType SetColor(Color start, Color finish, Emitter.Easer ease = null)
{
uint s = FP.HexColor(start);
uint f = FP.HexColor(finish);
s &= 0xFFFFFF;
f &= 0xFFFFFF;
_red = (s >> 16 & 0xFF) / 255.0f;
_green = (s >> 8 & 0xFF) / 255.0f;
_blue = (s & 0xFF) / 255.0f;
_redRange = (f >> 16 & 0xFF) / 255.0f - _red;
_greenRange = (f >> 8 & 0xFF) / 255.0f - _green;
_blueRange = (f & 0xFF) / 255.0f - _blue;
_colorEase = ease;
return(this);
}