69 lines
2.1 KiB
Java
69 lines
2.1 KiB
Java
package net.minecraft.util.valueproviders;
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import com.mojang.serialization.Codec;
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import com.mojang.serialization.DataResult;
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import com.mojang.serialization.MapCodec;
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import com.mojang.serialization.codecs.RecordCodecBuilder;
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import net.minecraft.util.RandomSource;
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public class TrapezoidFloat extends FloatProvider {
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public static final MapCodec<TrapezoidFloat> CODEC = RecordCodecBuilder.<TrapezoidFloat>mapCodec(
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instance -> instance.group(
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Codec.FLOAT.fieldOf("min").forGetter(trapezoidFloat -> trapezoidFloat.min),
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Codec.FLOAT.fieldOf("max").forGetter(trapezoidFloat -> trapezoidFloat.max),
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Codec.FLOAT.fieldOf("plateau").forGetter(trapezoidFloat -> trapezoidFloat.plateau)
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)
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.apply(instance, TrapezoidFloat::new)
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)
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.validate(
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trapezoidFloat -> {
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if (trapezoidFloat.max < trapezoidFloat.min) {
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return DataResult.error(() -> "Max must be larger than min: [" + trapezoidFloat.min + ", " + trapezoidFloat.max + "]");
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} else {
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return trapezoidFloat.plateau > trapezoidFloat.max - trapezoidFloat.min
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? DataResult.error(() -> "Plateau can at most be the full span: [" + trapezoidFloat.min + ", " + trapezoidFloat.max + "]")
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: DataResult.success(trapezoidFloat);
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}
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}
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);
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private final float min;
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private final float max;
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private final float plateau;
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public static TrapezoidFloat of(float min, float max, float plateau) {
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return new TrapezoidFloat(min, max, plateau);
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}
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private TrapezoidFloat(float min, float max, float plateau) {
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this.min = min;
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this.max = max;
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this.plateau = plateau;
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}
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@Override
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public float sample(RandomSource random) {
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float f = this.max - this.min;
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float g = (f - this.plateau) / 2.0F;
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float h = f - g;
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return this.min + random.nextFloat() * h + random.nextFloat() * g;
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}
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@Override
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public float getMinValue() {
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return this.min;
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}
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@Override
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public float getMaxValue() {
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return this.max;
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}
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@Override
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public FloatProviderType<?> getType() {
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return FloatProviderType.TRAPEZOID;
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}
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public String toString() {
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return "trapezoid(" + this.plateau + ") in [" + this.min + "-" + this.max + "]";
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}
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}
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