BlueMap/BlueMapCore/src/main/java/de/bluecolored/bluemap/core/util/math/VectorM2f.java

85 lines
2.5 KiB
Java

/*
* This file is part of BlueMap, licensed under the MIT License (MIT).
*
* Copyright (c) Blue (Lukas Rieger) <https://bluecolored.de>
* Copyright (c) contributors
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
package de.bluecolored.bluemap.core.util.math;
import com.flowpowered.math.GenericMath;
import com.flowpowered.math.TrigMath;
public class VectorM2f {
public float x, y;
public VectorM2f(float x, float y) {
this.x = x;
this.y = y;
}
public VectorM2f set(float x, float y) {
this.x = x;
this.y = y;
return this;
}
public VectorM2f translate(float x, float y) {
this.x += x;
this.y += y;
return this;
}
public VectorM2f rotate(float sx, float sy) { //sx,sy should be normalized
return set(x * sx - y * sy, y * sx + x * sy);
}
public VectorM2f transform(MatrixM3f t) {
return set(
t.m00 * x + t.m01 * y + t.m02,
t.m10 * x + t.m11 * y + t.m12
);
}
public VectorM2f normalize() {
final float length = length();
x /= length;
y /= length;
return this;
}
public float length() {
return (float) Math.sqrt(lengthSquared());
}
public float lengthSquared() {
return x * x + y * y;
}
public float angleTo(float x, float y) {
return (float) TrigMath.acos(
(this.x * x + this.y * y) /
(this.length() * Math.sqrt(x * x + y * y))
);
}
}