mirror of
https://github.com/BlueMap-Minecraft/BlueMap.git
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85 lines
2.5 KiB
Java
85 lines
2.5 KiB
Java
/*
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* This file is part of BlueMap, licensed under the MIT License (MIT).
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*
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* Copyright (c) Blue (Lukas Rieger) <https://bluecolored.de>
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* Copyright (c) contributors
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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 de.bluecolored.bluemap.core.util.math;
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import com.flowpowered.math.GenericMath;
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import com.flowpowered.math.TrigMath;
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public class VectorM2f {
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public float x, y;
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public VectorM2f(float x, float y) {
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this.x = x;
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this.y = y;
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}
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public VectorM2f set(float x, float y) {
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this.x = x;
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this.y = y;
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return this;
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}
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public VectorM2f translate(float x, float y) {
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this.x += x;
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this.y += y;
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return this;
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}
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public VectorM2f rotate(float sx, float sy) { //sx,sy should be normalized
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return set(x * sx - y * sy, y * sx + x * sy);
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}
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public VectorM2f transform(MatrixM3f t) {
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return set(
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t.m00 * x + t.m01 * y + t.m02,
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t.m10 * x + t.m11 * y + t.m12
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);
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}
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public VectorM2f normalize() {
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final float length = length();
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x /= length;
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y /= length;
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return this;
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}
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public float length() {
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return (float) Math.sqrt(lengthSquared());
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}
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public float lengthSquared() {
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return x * x + y * y;
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}
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public float angleTo(float x, float y) {
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return (float) TrigMath.acos(
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(this.x * x + this.y * y) /
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(this.length() * Math.sqrt(x * x + y * y))
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);
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}
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}
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