Mega Code Archive
Unit conversions
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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.
*/
/* $Id: FixedLength.java 279656 2005-09-08 22:06:48Z pietsch $ */
/**
* Utility class for unit conversions.
*/
public final class UnitConv {
/** conversion factory from millimeters to inches. */
public static final float IN2MM = 25.4f;
/** conversion factory from centimeters to inches. */
public static final float IN2CM = 2.54f;
/** conversion factory from inches to points. */
public static final int IN2PT = 72;
/**
* Converts millimeters (mm) to points (pt)
* @param mm the value in mm
* @return the value in pt
*/
public static double mm2pt(double mm) {
return mm * IN2PT / IN2MM;
}
/**
* Converts millimeters (mm) to millipoints (mpt)
* @param mm the value in mm
* @return the value in mpt
*/
public static double mm2mpt(double mm) {
return mm * 1000 * IN2PT / IN2MM;
}
/**
* Converts points (pt) to millimeters (mm)
* @param pt the value in pt
* @return the value in mm
*/
public static double pt2mm(double pt) {
return pt * IN2MM / IN2PT;
}
/**
* Converts millimeters (mm) to inches (in)
* @param mm the value in mm
* @return the value in inches
*/
public static double mm2in(double mm) {
return mm / IN2MM;
}
/**
* Converts inches (in) to millimeters (mm)
* @param in the value in inches
* @return the value in mm
*/
public static double in2mm(double in) {
return in * IN2MM;
}
/**
* Converts inches (in) to millipoints (mpt)
* @param in the value in inches
* @return the value in mpt
*/
public static double in2mpt(double in) {
return in * IN2PT * 1000;
}
/**
* Converts inches (in) to points (pt)
* @param in the value in inches
* @return the value in pt
*/
public static double in2pt(double in) {
return in * IN2PT;
}
/**
* Converts millipoints (mpt) to inches (in)
* @param mpt the value in mpt
* @return the value in inches
*/
public static double mpt2in(double mpt) {
return mpt / IN2PT / 1000;
}
/**
* Converts millimeters (mm) to pixels (px)
* @param mm the value in mm
* @param resolution the resolution in dpi (dots per inch)
* @return the value in pixels
*/
public static double mm2px(double mm, int resolution) {
return mm2in(mm) * resolution;
}
/**
* Converts millipoints (mpt) to pixels (px)
* @param mpt the value in mpt
* @param resolution the resolution in dpi (dots per inch)
* @return the value in pixels
*/
public static double mpt2px(double mpt, int resolution) {
return mpt2in(mpt) * resolution;
}
}
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