Returns the point of a given angle (in degrees) on a circle. - Android java.lang

Android examples for java.lang:Math Trigonometric Function

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Description

Returns the point of a given angle (in degrees) on a circle.

Demo Code

/**//from  ww w .j  ava  2 s  .c  om
 * ArcUtils.java
 *
 * Copyright (c) 2014 BioWink GmbH.
 *
 * 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 com.java2s;

import android.graphics.PointF;
import android.support.annotation.NonNull;

import static java.lang.Math.cos;

import static java.lang.Math.sin;

import static java.lang.Math.toRadians;

public class Main {
    /**
     * Returns the point of a given angle (in degrees) on a circle.
     *
     * @param center       The center of the circle.
     * @param radius       The radius of the circle.
     * @param angleDegrees The angle (in degrees).
     *
     * @return The point of the given angle on the specified circle.
     *
     * @see #pointFromAngleRadians(PointF, float, double)
     */
    @NonNull
    public static PointF pointFromAngleDegrees(@NonNull PointF center,
            float radius, float angleDegrees) {
        return pointFromAngleRadians(center, radius,
                toRadians(angleDegrees));
    }

    /**
     * Returns the point of a given angle (in radians) on a circle.
     *
     * @param center       The center of the circle.
     * @param radius       The radius of the circle.
     * @param angleRadians The angle (in radians).
     *
     * @return The point of the given angle on the specified circle.
     *
     * @see #pointFromAngleDegrees(PointF, float, float)
     */
    @NonNull
    public static PointF pointFromAngleRadians(@NonNull PointF center,
            float radius, double angleRadians) {
        return new PointF((float) (center.x + radius * cos(angleRadians)),
                (float) (center.y + radius * sin(angleRadians)));
    }
}

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