48 lines
1.6 KiB
Java
48 lines
1.6 KiB
Java
package net.minecraft.util;
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import net.minecraft.world.phys.Vec3;
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public class CubicSampler {
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private static final int GAUSSIAN_SAMPLE_RADIUS = 2;
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private static final int GAUSSIAN_SAMPLE_BREADTH = 6;
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private static final double[] GAUSSIAN_SAMPLE_KERNEL = new double[]{0.0, 1.0, 4.0, 6.0, 4.0, 1.0, 0.0};
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private CubicSampler() {
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}
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public static Vec3 gaussianSampleVec3(Vec3 p_130039_, CubicSampler.Vec3Fetcher p_130040_) {
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int i = Mth.floor(p_130039_.x());
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int j = Mth.floor(p_130039_.y());
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int k = Mth.floor(p_130039_.z());
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double d0 = p_130039_.x() - i;
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double d1 = p_130039_.y() - j;
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double d2 = p_130039_.z() - k;
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double d3 = 0.0;
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Vec3 vec3 = Vec3.ZERO;
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for (int l = 0; l < 6; l++) {
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double d4 = Mth.lerp(d0, GAUSSIAN_SAMPLE_KERNEL[l + 1], GAUSSIAN_SAMPLE_KERNEL[l]);
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int i1 = i - 2 + l;
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for (int j1 = 0; j1 < 6; j1++) {
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double d5 = Mth.lerp(d1, GAUSSIAN_SAMPLE_KERNEL[j1 + 1], GAUSSIAN_SAMPLE_KERNEL[j1]);
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int k1 = j - 2 + j1;
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for (int l1 = 0; l1 < 6; l1++) {
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double d6 = Mth.lerp(d2, GAUSSIAN_SAMPLE_KERNEL[l1 + 1], GAUSSIAN_SAMPLE_KERNEL[l1]);
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int i2 = k - 2 + l1;
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double d7 = d4 * d5 * d6;
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d3 += d7;
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vec3 = vec3.add(p_130040_.fetch(i1, k1, i2).scale(d7));
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}
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}
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}
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return vec3.scale(1.0 / d3);
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}
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@FunctionalInterface
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public interface Vec3Fetcher {
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Vec3 fetch(int p_130042_, int p_130043_, int p_130044_);
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}
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} |