package com.ximple.io.dgn7;
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import com.vividsolutions.jts.geom.Envelope;
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/**
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* Utility
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*
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* @author Ulysses
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* @version 0.1
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* @since 2006/5/18 下午 01:33:00
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*/
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public final class Utility
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{
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public static double converIntToDouble(int src)
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{
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return (double) ((long) ((src * 6) / 1000.0 + 0.5)) / 1000.0;
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}
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public static int converDoubleToInt(double src)
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{
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return (int) (src / 6 * 1000000.0);
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}
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public static int convertFromDGN(int aValue)
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{
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int newVal;
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newVal = (((aValue ^ 0x00008000) << 16) & 0xffff0000);
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newVal |= (aValue >>> 16) & 0x0000ffff;
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return newVal;
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}
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public static int converToDGN(int aValue)
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{
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int newVal;
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newVal = (aValue << 16 & 0xffff0000);
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newVal |= (((aValue ^ 0x80000000) >>> 16) & 0x0000ffff);
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return newVal;
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}
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public static double converIntToRotation(int aValue)
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{
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return aValue / 360000.0;
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}
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public static int converRotatioToInt(double aValue)
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{
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return (int) (aValue * 360000.0);
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}
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public static double converRotationToRadian(double aValue)
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{
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return aValue * Math.PI / 180;
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}
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public static double converUnitToCoord(int aValue)
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{
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double newVal;
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newVal = aValue / 1000.0;
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newVal += 2147483.648; // 2147483.648 = 2 ^ 31
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return newVal;
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}
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public static int converCoordToUnit(double aValue)
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{
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double newVal = aValue;
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newVal -= 2147483.648;
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newVal = newVal * 1000.0;
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return (int) newVal;
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}
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public static Envelope converUnitToCoord(Envelope range)
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{
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if (range == null)
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{
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return null;
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}
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return new Envelope(converUnitToCoord((int) range.getMinX()), converUnitToCoord((int) range.getMaxX()),
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converUnitToCoord((int) range.getMinY()), converUnitToCoord((int) range.getMaxY()));
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}
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public static Envelope converCoordToUnit(Envelope range)
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{
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if (range == null)
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{
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return null;
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}
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return new Envelope(converCoordToUnit(range.getMinX()), converCoordToUnit(range.getMaxX()),
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converCoordToUnit(range.getMinY()), converCoordToUnit(range.getMaxY()));
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}
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public static double convertDGNToIEEEDouble(short[] src)
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{
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int[] tmp = new int[2];
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long des;
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int sign;
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int exponent;
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int rndbits;
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if (src == null)
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{
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throw new RuntimeException("Source short array is null");
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}
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tmp[0] = ((src[0] << 16) & 0xffff0000) | (src[1] & 0x0000ffff);
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tmp[1] = ((src[2] << 16) & 0xffff0000) | (src[3] & 0x0000ffff);
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sign = (tmp[0] & 0x80000000);
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exponent = (tmp[0] >>> 23) & 0x000000ff;
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if (exponent != 0)
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{
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exponent = exponent - 129 + 1023;
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}
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rndbits = tmp[1] & 0x00000007;
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tmp[1] = tmp[1] >>> 3;
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tmp[1] = (tmp[1] & 0x1fffffff) | (tmp[0] << 29);
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if (rndbits != 0)
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{
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tmp[1] = tmp[1] | 0x00000001;
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}
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tmp[0] = (tmp[0] >>> 3) & 0x000fffff;
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tmp[0] = tmp[0] | (exponent << 20) | sign;
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des = (((long) tmp[0] << 32));
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des = des | (long) tmp[1];
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return Double.longBitsToDouble(des);
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}
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public static short[] convertIEEEDoubleToDGN(double src)
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{
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long newVal = Double.doubleToLongBits(src);
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// uint[] tmp = new int[ 2 ];
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// ushort[] des = new short[ 4 ];
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int[] tmp = new int[2];
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short[] des = new short[4];
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int sign;
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int exponent;
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tmp[0] = (int) ((newVal >>> 32));
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tmp[1] = (int) (newVal);
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// sign = ( int ) ( ( uint ) tmp[ 0 ] & 0x80000000 );
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sign = tmp[0] & 0x80000000;
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exponent = (tmp[0] >>> 20) & 0x07ff;
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if (exponent != 0)
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{
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exponent = exponent - 1023 + 129;
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}
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if (exponent > 255)
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{
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if (sign != 0)
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{
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des[0] = -1;
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} else
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{
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des[0] = 0x7fff;
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}
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des[1] = -1;
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des[2] = -1;
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des[3] = -1;
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return des;
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} else if ((exponent < 0) || ((exponent == 0) && (sign == 0)))
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{
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des[0] = 0x0;
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des[1] = 0x0;
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des[2] = 0x0;
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des[3] = 0x0;
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return des;
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} else
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{
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tmp[0] = (tmp[0] << 3) | (tmp[1] >> 29);
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tmp[0] = tmp[0] & 0x007fffff;
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tmp[0] = tmp[0] | (exponent << 23) | sign;
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// changed by phil 07/05/2004
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// tmp[ 1 ] = tmp[ 1 ] >> 3;
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tmp[1] = tmp[1] << 3;
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}
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des[0] = (short) ((tmp[0] >>> 16) & 0x0000ffff);
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des[1] = (short) (tmp[0] & 0x0000ffff);
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des[2] = (short) ((tmp[1] >>> 16) & 0x0000ffff);
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des[3] = (short) (tmp[1] & 0x0000ffff);
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return des;
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}
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public static double getLength(double x1, double y1, double x2, double y2)
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{
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double dx = x1 - x2;
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double dy = y1 - y2;
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return Math.sqrt(Math.pow(dx, 2) + Math.pow(dy, 2));
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}
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}
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