外部変形は データのやり取りをテキストファイルで行うので プログラム言語は 自由に選ぶことができます。図形は機能的かつシンプルなため、数多くのユーザーに受け入れられています。
javaで線に直交線を引く
:javaで線に直交線を引く
@echo off
if not exist %~dp0Lncross.class (
for /f "delims=:" %%n in ('findstr /n "^#!" %0') do (
more +%%n %0 > %~dpn0.java
javac -encoding shift_jis %~dpn0.java
)
)
copy jwc_temp.txt myfiles > nul
java -Dfile.encoding=shift_jis -classpath %~dp0 Lncross > jwc_temp.txt
goto:eof
REM #jww
REM #1ln 線を指示してください
REM #bz
REM #e
#!この次の行からプログラムを書いてください
import java.io.*;
import java.util.regex.Pattern;
class Lncross {
public static void main(String args) {
try {
BufferedReader f = new BufferedReader(new FileReader("myfiles"));
String line;
int i = 0;
String hp = new String[10];
String ln = new String[10];
while ( (line = f.readLine()) != null) {
if (Pattern.compile("^hq").matcher(line).find()) {
System.out.println("bz");
continue;
}
if (Pattern.compile("^hp[1-9][0-9]*").matcher(line).find()) {
String str = line.trim().split(" ", 2);
i = Integer.parseInt(str[0].replaceAll("^hp|ln|-$", ""));
hp[i] = str[1].trim();
}
if (Pattern.compile("^hhp[1-9][0-9]*ln").matcher(line).find()) {
String str = line.trim();
i = Integer.parseInt(str.replaceAll("^hhp|ln$", ""));
continue;
}
if (Pattern.compile("^ ").matcher(line).find()) {
String p = line.trim().split(" ");
if (p.length == 4) {
ln[i]=line.trim();
}
}
}
f.close();
String p0, ln1, p1, p2, p3, pc;
double x1, y1, x2, y2, l1, l2, l3;
double l, d, lx, ly, xc, yc;
p0 = hp[1];
ln1 = ln[1];
String s = ln1.split(" ");
p1 = s[0] + " " + s[1];
p2 = s[2] + " " + s[3];
x1 = Double.parseDouble(s[0]);
y1 = Double.parseDouble(s[1]);
x2 = Double.parseDouble(s[2]);
y2 = Double.parseDouble(s[3]);
p3 = String.format("%.15f %.15f", (x1 + x2) / 2, (y1 + y2) / 2);
l1 = lnlength(p0 + " " + p1);
l2 = lnlength(p0 + " " + p2);
l3 = lnlength(p0 + " " + p3);
pc = p3;
if (Math.signum(l2 - l1) + Math.signum(l3 - l1) == 2) { pc = p1; }
if (Math.signum(l1 - l2) + Math.signum(l3 - l2) == 2) { pc = p2; }
l = lnlength(ln1) / 2;
d = lnslope(ln1);
lx = l * Math.cos(d);
ly = l * Math.sin(d);
String p = pc.split(" ");
xc = Double.parseDouble(p[0]);
yc = Double.parseDouble(p[1]);
System.out.printf("%.15f %.15f %.15f %.15f%n", xc + ly, yc - lx, xc - ly, yc + lx);
} catch (IOException e) {
System.out.println(e);
}
}
private static double lnlength(String ln){
double x1, y1, x2, y2;
String s = ln.split(" ");
x1 = Double.parseDouble(s[0]);
y1 = Double.parseDouble(s[1]);
x2 = Double.parseDouble(s[2]);
y2 = Double.parseDouble(s[3]);
return Math.hypot(x2 - x1, y2 - y1);
}
private static double lnslope(String ln){
double x1, y1, x2, y2;
String[] s = ln.split(" ");
x1 = Double.parseDouble(s[0]);
y1 = Double.parseDouble(s[1]);
x2 = Double.parseDouble(s[2]);
y2 = Double.parseDouble(s[3]);
return Math.atan2(y2 - y1, x2 - x1);
}
}
