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Optimize cardinal rotations for RotateColorSampler

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Astrash
2023-06-14 12:07:37 +10:00
parent d0591f292e
commit a5cbce3667
2 changed files with 44 additions and 10 deletions
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49
common/addons/library-image/src/main/java/com/dfsek/terra/addons/image/colorsampler/mutate/RotateColorSampler.java
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@@ -4,23 +4,58 @@ import net.jafama.FastMath;
import com.dfsek.terra.addons.image.colorsampler.ColorSampler;
public class RotateColorSampler implements ColorSampler {
private final ColorSampler sampler;
private final double radians;
public RotateColorSampler(ColorSampler sampler, double radians) {
private final RotationMethod rotationMethod;
public RotateColorSampler(ColorSampler sampler, double degrees) {
this.sampler = sampler;
this.radians = radians;
double normalizedDegrees = degrees % 360.0;
if (normalizedDegrees < 0) normalizedDegrees += 360.0;
if (normalizedDegrees == 0.0)
rotationMethod = RotationMethod.DEG_0;
else if (normalizedDegrees == 90.0)
rotationMethod = RotationMethod.DEG_90;
else if (normalizedDegrees == 180.0)
rotationMethod = RotationMethod.DEG_180;
else if (normalizedDegrees == 270.0)
rotationMethod = RotationMethod.DEG_270;
else
rotationMethod = RotationMethod.RAD_ANY;
this.radians = FastMath.toRadians(degrees);
}
@Override
public int apply(int x, int z) {
return sampler.apply(
(int) (x * FastMath.cos(radians) - z * FastMath.sin(radians)),
(int) (z * FastMath.cos(radians) + x * FastMath.sin(radians))
);
int rx = switch(rotationMethod) {
case DEG_0 -> x;
case DEG_90 -> -z;
case DEG_180 -> -x;
case DEG_270 -> z;
case RAD_ANY -> (int) (x * FastMath.cos(radians) - z * FastMath.sin(radians));
};
int rz = switch(rotationMethod) {
case DEG_0 -> z;
case DEG_90 -> x;
case DEG_180 -> -z;
case DEG_270 -> -x;
case RAD_ANY -> (int) (z * FastMath.cos(radians) + x * FastMath.sin(radians));
};
return sampler.apply(rx, rz);
}
private enum RotationMethod {
DEG_0,
DEG_90,
DEG_180,
DEG_270,
RAD_ANY,
}
}

5
common/addons/library-image/src/main/java/com/dfsek/terra/addons/image/config/colorsampler/mutate/RotateColorSamplerTemplate.java
View File

@@ -1,7 +1,6 @@
package com.dfsek.terra.addons.image.config.colorsampler.mutate;
import com.dfsek.tectonic.api.config.template.annotations.Value;
import net.jafama.FastMath;
import com.dfsek.terra.addons.image.colorsampler.ColorSampler;
import com.dfsek.terra.addons.image.colorsampler.mutate.RotateColorSampler;
@@ -10,10 +9,10 @@ import com.dfsek.terra.addons.image.colorsampler.mutate.RotateColorSampler;
public class RotateColorSamplerTemplate extends MutateColorSamplerTemplate {
@Value("angle")
private double angle;
private double degrees;
@Override
public ColorSampler get() {
return new RotateColorSampler(sampler, FastMath.toRadians(angle));
return new RotateColorSampler(sampler, degrees);
}
}