mirror of
https://github.com/Jozufozu/Flywheel.git
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a42c027b6f
- Fix Resources not being closed properly - Change versioning scheme to match Create - Add LICENSE to built jar - Fix mods.toml version sync - Move JOML code to non-src directory - Update Gradle - Organize imports
102 lines
4.5 KiB
Java
102 lines
4.5 KiB
Java
/*
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* The MIT License
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*
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* Copyright (c) 2016-2021 JOML
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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
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* all 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
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* THE SOFTWARE.
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*/
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package com.jozufozu.flywheel.repack.joml.sampling;
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import com.jozufozu.flywheel.repack.joml.Random;
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/**
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* Creates samples on a spiral around a center point.
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*
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* @author Kai Burjack
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*/
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public class SpiralSampling {
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private final Random rnd;
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/**
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* Create a new instance of {@link SpiralSampling} and initialize the random number generator with the given <code>seed</code>.
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*
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* @param seed
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* the seed to initialize the random number generator with
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*/
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public SpiralSampling(long seed) {
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rnd = new Random(seed);
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}
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/**
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* Create <code>numSamples</code> number of samples on a spiral with maximum radius <code>radius</code> around the center using <code>numRotations</code> number of rotations
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* along the spiral, and call the given <code>callback</code> for each sample generated.
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* <p>
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* The generated sample points are distributed with equal angle differences around the spiral, so they concentrate towards the center.
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*
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* @param radius
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* the maximum radius of the spiral
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* @param numRotations
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* the number of rotations of the spiral
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* @param numSamples
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* the number of samples to generate
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* @param callback
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* will be called for each sample generated
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*/
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public void createEquiAngle(float radius, int numRotations, int numSamples, Callback2d callback) {
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for (int sample = 0; sample < numSamples; sample++) {
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float angle = 2.0f * (float) Math.PI * (sample * numRotations) / numSamples;
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float r = radius * sample / (numSamples - 1);
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float x = (float) Math.sin_roquen_9(angle + 0.5f * (float) Math.PI) * r;
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float y = (float) Math.sin_roquen_9(angle) * r;
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callback.onNewSample(x, y);
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}
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}
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/**
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* Create <code>numSamples</code> number of samples on a spiral with maximum radius <code>radius</code> around the center using <code>numRotations</code> number of rotations
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* along the spiral, and call the given <code>callback</code> for each sample generated.
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* <p>
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* The generated sample points are distributed with equal angle differences around the spiral, so they concentrate towards the center.
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* <p>
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* Additionally, the radius of each sample point is jittered by the given <code>jitter</code> factor.
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*
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* @param radius
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* the maximum radius of the spiral
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* @param numRotations
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* the number of rotations of the spiral
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* @param numSamples
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* the number of samples to generate
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* @param jitter
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* the factor by which the radius of each sample point is jittered. Possible values are <code>[0..1]</code>
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* @param callback
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* will be called for each sample generated
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*/
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public void createEquiAngle(float radius, int numRotations, int numSamples, float jitter, Callback2d callback) {
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float spacing = radius / numRotations;
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for (int sample = 0; sample < numSamples; sample++) {
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float angle = 2.0f * (float) Math.PI * (sample * numRotations) / numSamples;
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float r = radius * sample / (numSamples - 1) + (rnd.nextFloat() * 2.0f - 1.0f) * spacing * jitter;
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float x = (float) Math.sin_roquen_9(angle + 0.5f * (float) Math.PI) * r;
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float y = (float) Math.sin_roquen_9(angle) * r;
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callback.onNewSample(x, y);
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}
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}
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}
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