public void Start()
{
// Create it:
Filter = new SurfaceTexture();
// Apply initial properties (inputs into the filter):
Filter.Set("contours", Contours);
Filter.Set("uniformity", Uniformity);
Filter.Set("frequency", Frequency);
// Start building our voronoi node.
// Voronoi is, in short, a kind of cellular noise.
Voronoi v = new Voronoi();
// *All* are required:
v.Frequency = new Property(Filter, "frequency");
v.Distance = new Property((int)VoronoiDistance.Euclidean);
v.DrawMode = new Property((int)VoronoiDraw.Normal);
v.MinkowskiNumber = new Property(0f);
v.Function = new Property((int)VoronoiMethod.F2minusF1);
v.Jitter = new Property(Filter, "uniformity");
// If we just displayed 'v' as our root node, we'd just
// get some voronoi noise which looks like a bunch of black and white balls.
// So, next, we'll tonemap for interesting effects.
// Create a sine wave with a variable frequency (to be used by the tonemapper):
TextureNode graph = new ScaleInput(
new SineWave(),
new Property(Filter, "contours")
);
// Create the tonemapper node now.
// -> We're mapping the black->white range of pixels from the voronoi noise via our sine graph.
// That creates a kind of hypnotic black-and-white 'rippling' effect.
ToneMap map = new ToneMap(v, graph);
// Let's make it some more exciting colours.
// Create a gradient from a background->foreground colour, and use lookup to map from our b+w to that gradient.
Blaze.Gradient2D rawGradient = new Blaze.Gradient2D();
rawGradient.Add(0f, Color.blue);
rawGradient.Add(1f, Color.white);
// Create that lookup now:
Filter.Root = new Lookup(
new Loonim.Gradient(rawGradient, null),
map
);
// Create the draw information:
// - GPU mode
// - Size px square
// - HDR (true)
DrawInfo = new DrawInfo((int)Size);
}
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;
}
}
