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/*
* Copyright (C) 2007 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package android.util;
/**
* Reimplements _Original_FloatMath with the standard libraries.
*
* Math routines similar to those found in {@link java.lang.Math}. Performs
* computations on {@code float} values directly without incurring the overhead
* of conversions to and from {@code double}.
*
* <p>On one platform, {@code FloatMath.sqrt(100)} executes in one third of the
* time required by {@code java.lang.Math.sqrt(100)}.</p>
*/
public class FloatMath {
/** Prevents instantiation. */
private FloatMath() {}
/**
* Returns the float conversion of the most positive (i.e. closest to
* positive infinity) integer value which is less than the argument.
*
* @param value to be converted
* @return the floor of value
*/
public static float floor(float value) {
return (float)Math.floor(value);
}
/**
* Returns the float conversion of the most negative (i.e. closest to
* negative infinity) integer value which is greater than the argument.
*
* @param value to be converted
* @return the ceiling of value
*/
public static float ceil(float value) {
return (float)Math.ceil(value);
}
/**
* Returns the closest float approximation of the sine of the argument.
*
* @param angle to compute the cosine of, in radians
* @return the sine of angle
*/
public static float sin(float angle) {
return (float)Math.sin(angle);
}
/**
* Returns the closest float approximation of the cosine of the argument.
*
* @param angle to compute the cosine of, in radians
* @return the cosine of angle
*/
public static float cos(float angle) {
return (float)Math.cos(angle);
}
/**
* Returns the closest float approximation of the square root of the
* argument.
*
* @param value to compute sqrt of
* @return the square root of value
*/
public static float sqrt(float value) {
return (float)Math.sqrt(value);
}
}
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