private void colorData() {
float[] vertexValues = meshData.vertexValues;
short[] vertexColixes = meshData.vertexColixes;
meshData.polygonColixes = null;
float valueBlue = jvxlData.valueMappedToBlue;
float valueRed = jvxlData.valueMappedToRed;
short minColorIndex = jvxlData.minColorIndex;
short maxColorIndex = jvxlData.maxColorIndex;
if (params.colorEncoder == null) params.colorEncoder = new ColorEncoder(null);
params.colorEncoder.setRange(
params.valueMappedToRed, params.valueMappedToBlue, params.isColorReversed);
for (int i = meshData.vertexCount; --i >= 0; ) {
float value = vertexValues[i];
if (minColorIndex >= 0) {
if (value <= 0) vertexColixes[i] = minColorIndex;
else if (value > 0) vertexColixes[i] = maxColorIndex;
} else {
if (value <= valueRed) value = valueRed;
if (value >= valueBlue) value = valueBlue;
vertexColixes[i] = params.colorEncoder.getColorIndex(value);
}
}
if ((params.nContours > 0 || jvxlData.contourValues != null)
&& jvxlData.contourColixes == null) {
int n = (jvxlData.contourValues == null ? params.nContours : jvxlData.contourValues.length);
short[] colors = jvxlData.contourColixes = new short[n];
float[] values = jvxlData.contourValues;
if (values == null) values = jvxlData.contourValuesUsed;
if (jvxlData.contourValuesUsed == null)
jvxlData.contourValuesUsed = (values == null ? new float[n] : values);
float dv = (valueBlue - valueRed) / (n + 1);
// n + 1 because we want n lines between n + 1 slices
params.colorEncoder.setRange(
params.valueMappedToRed, params.valueMappedToBlue, params.isColorReversed);
for (int i = 0; i < n; i++) {
float v = (values == null ? valueRed + (i + 1) * dv : values[i]);
jvxlData.contourValuesUsed[i] = v;
colors[i] = Graphics3D.getColixTranslucent(params.colorEncoder.getArgb(v));
}
// TODO -- this strips translucency
jvxlData.contourColors = Graphics3D.getHexCodes(colors);
}
}
