com.almasb.fxgl.physics.box2d.common.JBoxUtils Maven / Gradle / Ivy

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/*
 * FXGL - JavaFX Game Library. The MIT License (MIT).
 * Copyright (c) AlmasB ([email protected]).
 * See LICENSE for details.
 */
/*
 * JBox2D - A Java Port of Erin Catto's Box2D
 * 
 * JBox2D homepage: http://jbox2d.sourceforge.net/
 * Box2D homepage: http://www.box2d.org
 * 
 * This software is provided 'as-is', without any express or implied
 * warranty.  In no event will the authors be held liable for any damages
 * arising from the use of this software.
 * 
 * Permission is granted to anyone to use this software for any purpose,
 * including commercial applications, and to alter it and redistribute it
 * freely, subject to the following restrictions:
 * 
 * 1. The origin of this software must not be misrepresented; you must not
 * claim that you wrote the original software. If you use this software
 * in a product, an acknowledgment in the product documentation would be
 * appreciated but is not required.
 * 2. Altered source versions must be plainly marked as such, and must not be
 * misrepresented as being the original software.
 * 3. This notice may not be removed or altered from any source distribution.
 */

package com.almasb.fxgl.physics.box2d.common;

import com.almasb.fxgl.core.math.Vec2;

/**
 * A few math methods that don't fit very well anywhere else.
 */
public final class JBoxUtils {

    public static int floor(float x) {
        int y = (int) x;
        if (x < y) {
            return y - 1;
        }
        return y;
    }

    /** Returns the closest value to 'a' that is in between 'low' and 'high' */
    public static float clamp(float a, float low, float high) {
        return Math.max(low, Math.min(a, high));
    }

    public static float sqrt(float x) {
        return (float) StrictMath.sqrt(x);
    }

    public static float distanceSquared(Vec2 v1, Vec2 v2) {
        float dx = v1.x - v2.x;
        float dy = v1.y - v2.y;
        return dx * dx + dy * dy;
    }

    public static float distance(Vec2 v1, Vec2 v2) {
        return sqrt(distanceSquared(v1, v2));
    }
}