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ColorMappingVariationSaturation.java
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ColorMappingVariationSaturation.java
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package org.osmdroid.views.overlay.advancedpolyline;
/**
* Color mapping for saturation variation.
*
* @author Matthias Dittmer
*/
public class ColorMappingVariationSaturation extends ColorMappingVariation {
/**
* Fixed HSL values.
*/
private float mHue;
private float mLuminance;
/**
* Constructor
*
* @param scalarStart start of scalar
* @param scalarEnd end of scalar
* @param saturationStart saturation start value
* @param saturationEnd saturation end value
* @param hue fixed hue value
* @param luminance fixed luminance value
*/
public ColorMappingVariationSaturation(
final float scalarStart, final float scalarEnd, float saturationStart, float saturationEnd,
final float hue, final float luminance) {
// do basic clipping for saturation value
// please note: end can be lower than start for inverse mapping
saturationStart = ColorHelper.constrain(saturationStart, 0.0f, 1.0f);
saturationEnd = ColorHelper.constrain(saturationEnd, 0.0f, 1.0f);
// do clipping for hue and luminance
mHue = ColorHelper.constrain(hue, 0.0f, 360.0f);
mLuminance = ColorHelper.constrain(luminance, 0.0f, 1.0f);
init(scalarStart, scalarEnd, saturationStart, saturationEnd);
}
@Override
protected float getHue(final float pScalar) {
return mHue;
}
@Override
protected float getSaturation(final float pScalar) {
return mapScalar(pScalar);
}
@Override
protected float getLuminance(final float pScalar) {
return mLuminance;
}
}