Sha256: 375c65c551ca6450bcc137beeb2d6d75d5d4f47eb12110623b6203f5bddc7902
Contents?: true
Size: 668 Bytes
Versions: 6
Compression:
Stored size: 668 Bytes
Contents
package org.sunflow.core.filter;
import org.sunflow.core.Filter;
public class LanczosFilter implements Filter {
@Override
public float getSize() {
return 4.0f;
}
@Override
public float get(float x, float y) {
return sinc1d(x * 0.5f) * sinc1d(y * 0.5f);
}
private float sinc1d(float x) {
x = Math.abs(x);
if (x < 1e-5f) {
return 1;
}
if (x > 1.0f) {
return 0;
}
x *= Math.PI;
float sinc = (float) Math.sin(3 * x) / (3 * x);
float lanczos = (float) Math.sin(x) / x;
return sinc * lanczos;
}
}
Version data entries
6 entries across 6 versions & 1 rubygems