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