public static Vertex FastLerp(Vertex a, Vertex b, float t) => new Vertex
{
point = Vector4.Lerp(a.point, b.point, t),
onePerZ = Mathf.Lerp(a.onePerZ, b.onePerZ, t),
//uv = Vector2.Lerp(a.uv, b.uv, t),
color = Color32.Lerp(a.color, b.color, t),
};
public static Vertex FastLerp(Vertex a, Vertex b, float t) => new Vertex
{
point = Vector4.Lerp(a.point, b.point, t),
onePerZ = MathRaster.Lerp(a.onePerZ, b.onePerZ, t),
uv = Vector2.Lerp(a.uv, b.uv, t),
normal = Vector3.Lerp(a.normal, b.normal, t),
color = Color32.Lerp(a.color, b.color, t),
distance2Cam = MathRaster.Lerp(a.distance2Cam, b.distance2Cam, t)
};
/// <remarks>
/// this assumes that steps have been sorted by GradientEditor
/// </remarks>
public Vector4 Sample(float t)
{
t = t.Clamp(0, 1);
Step previousStep = null;
foreach (var step in Steps)
{
if (step.NormalizedPosition >= t)
{
if (previousStep == null || previousStep.NormalizedPosition >= step.NormalizedPosition)
{
return(step.Color);
}
float amount = 0; // Hold
switch (Interpolation)
{
case Interpolations.Linear:
amount = MathUtils.RemapAndClamp(t, previousStep.NormalizedPosition, step.NormalizedPosition, 0, 1);
break;
case Interpolations.Smooth:
amount = MathUtils.RemapAndClamp(t, previousStep.NormalizedPosition, step.NormalizedPosition, 0, 1);
amount = MathUtils.SmootherStep(0, 1, amount);
break;
case Interpolations.OkLab:
amount = MathUtils.RemapAndClamp(t, previousStep.NormalizedPosition, step.NormalizedPosition, 0, 1);
return(OkLab.Mix(previousStep.Color, step.Color, amount));
}
return(Vector4.Lerp(previousStep.Color, step.Color, amount));
}
previousStep = step;
}
return(previousStep?.Color ?? Vector4.One);
}