/// <summary>Renders a slice of this gradient at the given point.</summary>
/// <param name="at">The percentage along this gradient to render. Variest from 0->100.</param>
public RenderedGradient Render(float at)
{
int index = IndexOf(at);
if (index == Gradients.Length - 1 || index < 0)
{
if (index < 0)
{
index = 0;
}
return(RenderedGradients[index]);
}
else
{
RenderedGradient gradientA = RenderedGradients[index];
RenderedGradient gradientB = RenderedGradients[index + 1];
float delta = ((at - Positions[index]) / (Positions[index + 1] - Positions[index]));
Color[] newPixels = new Color[PixelCount];
for (int i = 0; i < PixelCount; i++)
{
Color a = gradientA[i];
Color b = gradientB[i];
newPixels[i] = new Color(a.r + (b.r - a.r) * delta, a.g + (b.g - a.g) * delta, a.b + (b.b - a.b) * delta, a.a + (b.a - a.a) * delta);
}
return(new RenderedGradient(newPixels));
}
}
public void Add(Gradient2D gradient, float at)
{
RenderedGradient rendition = gradient.Render(PixelCount);
if (Gradients == null)
{
Gradients = new Gradient2D[] { gradient };
RenderedGradients = new RenderedGradient[1] {
rendition
};
Positions = new float[] { at };
}
else
{
Gradient2D[] newGradients = new Gradient2D[Gradients.Length + 1];
RenderedGradient[] newRenders = new RenderedGradient[Gradients.Length + 1];
float[] newPositions = new float[Gradients.Length + 1];
int index = 0;
bool inserted = false;
for (int i = 0; i < Gradients.Length; i++)
{
//Copy everything across.
if (!inserted && Positions[i] > at)
{
inserted = true;
newGradients[index] = gradient;
newRenders[index] = rendition;
newPositions[index++] = at;
}
newGradients[index] = Gradients[i];
newRenders[index] = RenderedGradients[i];
newPositions[index++] = Positions[i];
}
if (!inserted)
{
newGradients[index] = gradient;
newRenders[index] = rendition;
newPositions[index] = at;
}
Gradients = newGradients;
Positions = newPositions;
RenderedGradients = newRenders;
}
}
