}
@Override
public void process(GeneratingRegion region) {
World2dPreviewFacet facet = new World2dPreviewFacet();
SurfaceHeightFacet surfaceFacet = region.getRegionFacet(SurfaceHeightFacet.class);
SeaLevelFacet seaLevelFacet = region.getRegionFacet(SeaLevelFacet.class);
float seaLevel = seaLevelFacet.getSeaLevel();
float[] values = surfaceFacet.getInternal();
float total = 0;
// averaging every single value takes too much time, only use some of the values in our average
int sampleRate = Math.max(1, region.getRegion().sizeX() / maxSamplesPerRegion);
for (int i = 0; i < values.length; i++) {
if (i % sampleRate == 0) {
total += values[i];
}
}
float average = total / (values.length / sampleRate);
if (average < seaLevel) {
// start with blue and make closer to black the deeper we go
facet.setColor(new Color(0, 0, TeraMath.clamp((int) (255 * (1.0 - (Math.abs(average - seaLevel) / maxDepthDescribed))), 100, 255)));
} else {
// start with green make closer to black the higher we go
facet.setColor(new Color(0, TeraMath.clamp((int) (255 * (1.0 - ((average - seaLevel) / maxHeightDescribed))), 100, 255), 0));
}
region.setRegionFacet(World2dPreviewFacet.class, facet);
}