public unsafe override float HasTriggered(Particle parentParticle)
{
if (!FieldAccessor.IsValid() || !SecondFieldAccessor.IsValid())
{
return(0f);
}
var deltaPosition = ((*((Vector3 *)parentParticle[FieldAccessor])) - (*((Vector3 *)parentParticle[SecondFieldAccessor]))).Length();
return(deltaPosition);
}
/// <summary>
/// Gets the combined size for the particle, adding its field value (if any) to its sampled value from the curve
/// </summary>
/// <param name="particle">Target particle</param>
/// <param name="sizeField">Size field accessor</param>
/// <param name="lifeField">Normalized life for sampling</param>
/// <returns>Particle's current uniform size</returns>
protected unsafe float GetParticleSize(Particle particle, ParticleFieldAccessor<float> sizeField, ParticleFieldAccessor<float> lifeField)
{
var particleSize = sizeField.IsValid() ? particle.Get(sizeField) : 1f;
if (SamplerSize == null)
return particleSize;
var life = 1f - (*((float*)particle[lifeField])); // The Life field contains remaining life, so for sampling we take (1 - life)
return particleSize * SamplerSize.Evaluate(life);
}
/// <summary>
/// Gets the combined size for the particle, adding its field value (if any) to its sampled value from the curve
/// </summary>
/// <param name="particle">Target particle</param>
/// <param name="sizeField">Size field accessor</param>
/// <param name="lifeField">Normalized life for sampling</param>
/// <returns>Particle's current uniform size</returns>
protected unsafe float GetParticleSize(Particle particle, ParticleFieldAccessor <float> sizeField, ParticleFieldAccessor <float> lifeField)
{
var particleSize = sizeField.IsValid() ? particle.Get(sizeField) : 1f;
if (SamplerSize == null)
{
return(particleSize);
}
var life = 1f - (*((float *)particle[lifeField])); // The Life field contains remaining life, so for sampling we take (1 - life)
return(particleSize * SamplerSize.Evaluate(life));
}
/// <summary>
/// Gets the combined rotation for the particle, adding its field value (if any) to its sampled value from the curve
/// </summary>
/// <param name="particle">Target particle</param>
/// <param name="rotationField">Rotation field accessor</param>
/// <param name="lifeField">Normalized particle life for sampling</param>
/// <returns>Screenspace rotation in radians, positive is clockwise</returns>
protected unsafe float GetParticleRotation(Particle particle, ParticleFieldAccessor <float> rotationField, ParticleFieldAccessor <float> lifeField)
{
var particleRotation = rotationField.IsValid() ? particle.Get(rotationField) : 0f;
if (SamplerRotation == null)
{
return(particleRotation);
}
var life = 1f - (*((float *)particle[lifeField])); // The Life field contains remaining life, so for sampling we take (1 - life)
return(particleRotation + MathUtil.DegreesToRadians(SamplerRotation.Evaluate(life)));
}
/// <summary>
/// Gets the combined rotation for the particle, adding its field value (if any) to its sampled value from the curve
/// </summary>
/// <param name="particle">Target particle</param>
/// <param name="rotationField">Rotation field accessor</param>
/// <param name="lifeField">Normalized particle life for sampling</param>
/// <returns>Quaternion rotation of the quad particle, assuming flat horizontal square at neutral rotation</returns>
protected unsafe Quaternion GetParticleRotation(Particle particle, ParticleFieldAccessor <Quaternion> rotationField, ParticleFieldAccessor <float> lifeField)
{
var particleRotation = rotationField.IsValid() ? particle.Get(rotationField) : Quaternion.Identity;
if (SamplerRotation == null)
{
return(particleRotation);
}
var life = 1f - (*((float *)particle[lifeField])); // The Life field contains remaining life, so for sampling we take (1 - life)
return(SamplerRotation.Evaluate(life) * particleRotation);
}
/// <summary>
/// Gets the combined rotation for the particle, adding its field value (if any) to its sampled value from the curve
/// </summary>
/// <param name="particle">Target particle</param>
/// <param name="rotationField">Rotation field accessor</param>
/// <param name="lifeField">Normalized particle life for sampling</param>
/// <returns>Screen space rotation in radians, positive is clockwise</returns>
protected unsafe float GetParticleRotation(Particle particle, ParticleFieldAccessor<float> rotationField, ParticleFieldAccessor<float> lifeField)
{
var particleRotation = rotationField.IsValid() ? particle.Get(rotationField) : 1f;
if (SamplerRotation == null)
return particleRotation;
var life = 1f - (*((float*)particle[lifeField])); // The Life field contains remaining life, so for sampling we take (1 - life)
return particleRotation + MathUtil.DegreesToRadians(SamplerRotation.Evaluate(life));
}
/// <summary>
/// Gets the combined rotation for the particle, adding its field value (if any) to its sampled value from the curve
/// </summary>
/// <param name="particle">Target particle</param>
/// <param name="rotationField">Rotation field accessor</param>
/// <param name="lifeField">Normalized particle life for sampling</param>
/// <returns>Quaternion rotation of the quad particle, assuming flat horizontal square at neutral rotation</returns>
protected unsafe Quaternion GetParticleRotation(Particle particle, ParticleFieldAccessor<Quaternion> rotationField, ParticleFieldAccessor<float> lifeField)
{
var particleRotation = rotationField.IsValid() ? particle.Get(rotationField) : Quaternion.Identity;
if (SamplerRotation == null)
return particleRotation;
var life = 1f - (*((float*)particle[lifeField])); // The Life field contains remaining life, so for sampling we take (1 - life)
return SamplerRotation.Evaluate(life) * particleRotation;
}
