Sha256: 2abb47d8be76b9af969fb16fb7ac43cc41ed01df2421fba96a78167e6e423256
Contents?: true
Size: 741 Bytes
Versions: 6
Compression:
Stored size: 741 Bytes
Contents
package org.sunflow.core.filter;
import org.sunflow.core.Filter;
public class BlackmanHarrisFilter implements Filter {
@Override
public float getSize() {
return 4.0f;
}
@Override
public float get(float x, float y) {
return bh1d(x * 0.5f) * bh1d(y * 0.5f);
}
private float bh1d(float x) {
if (x < -1.0f || x > 1.0f) {
return 0.0f;
}
x = (x + 1) * 0.5f;
final double A0 = 0.35875;
final double A1 = -0.48829;
final double A2 = 0.14128;
final double A3 = -0.01168;
return (float) (A0 + A1 * Math.cos(2 * Math.PI * x) + A2 * Math.cos(4 * Math.PI * x) + A3 * Math.cos(6 * Math.PI * x));
}
}
Version data entries
6 entries across 6 versions & 1 rubygems