129 lines
4.2 KiB
Java
129 lines
4.2 KiB
Java
/*
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*
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* MIT License
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*
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* Copyright (c) 2020 TerraForged
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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package com.terraforged.core.world.geology;
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import com.terraforged.core.util.Seed;
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import me.dags.noise.Module;
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import me.dags.noise.Source;
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import me.dags.noise.util.NoiseUtil;
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import java.util.ArrayList;
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import java.util.LinkedList;
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import java.util.List;
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public class Strata<T> {
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private final Module heightMod;
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private final List<Stratum<T>> strata;
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private Strata(Module heightMod, List<Stratum<T>> strata) {
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this.strata = strata;
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this.heightMod = heightMod;
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}
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public boolean downwards(final int x, final int y, final int z, final Stratum.Visitor<T> visitor) {
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DepthBuffer buffer = new DepthBuffer();
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initBuffer(buffer, x, z);
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return downwards(x, y, z, buffer, visitor);
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}
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public boolean downwards(final int x, final int y, final int z, final DepthBuffer buffer, Stratum.Visitor<T> visitor) {
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initBuffer(buffer, x, z);
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int py = y;
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T last = null;
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for (int i = 0; i < strata.size(); i++) {
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float depth = buffer.getDepth(i);
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int height = NoiseUtil.round(depth * y);
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T value = strata.get(i).getValue();
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last = value;
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for (int dy = 0; dy < height; dy++) {
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if (py <= y) {
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boolean cont = visitor.visit(py, value);
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if (!cont) {
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return false;
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}
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}
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if (--py < 0) {
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return false;
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}
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}
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}
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if (last != null) {
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while (py > 0) {
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visitor.visit(py, last);
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py--;
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}
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}
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return true;
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}
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private int getYOffset(int x, int z) {
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return (int) (64 * heightMod.getValue(x, z));
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}
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private void initBuffer(DepthBuffer buffer, int x, int z) {
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buffer.init(strata.size());
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for (int i = 0; i < strata.size(); i++) {
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float depth = strata.get(i).getDepth(x, z);
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buffer.set(i, depth);
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}
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}
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public static <T> Builder<T> builder(int seed, me.dags.noise.source.Builder noise) {
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return new Builder<>(seed, noise);
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}
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public static class Builder<T> {
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private final Seed seed;
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private final me.dags.noise.source.Builder noise;
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private final List<Stratum<T>> strata = new LinkedList<>();
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public Builder(int seed, me.dags.noise.source.Builder noise) {
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this.seed = new Seed(seed);
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this.noise = noise;
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}
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public Builder<T> add(T material, double depth) {
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Module module = noise.seed(seed.next()).perlin().scale(depth);
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strata.add(Stratum.of(material, module));
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return this;
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}
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public Builder<T> add(Source type, T material, double depth) {
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Module module = noise.seed(seed.next()).build(type).scale(depth);
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strata.add(Stratum.of(material, module));
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return this;
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}
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public Strata<T> build() {
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Module height = Source.cell(seed.next(), 100);
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return new Strata<>(height, new ArrayList<>(strata));
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}
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}
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}
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