1 files changed, 76 insertions, 0 deletions
diff --git a/editsrot.c b/editsrot.c
new file mode 100644
index 0000000..b6764d1
--- /dev/null
+++ b/editsrot.c
@@ -0,0 +1,76 @@
+/*
+
+    viDOOM - level editor for DOOM
+
+    Copyright (C) 2000  Ian Cowburn (ianc@noddybox.demon.co.uk)
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
+    -------------------------------------------------------------------------
+
+    Editor scale and rotation routines
+
+*/
+static const char rcs_id[]="$Id$";
+
+#include "config.h"
+#include "globals.h"
+#include "editvar.h"
+
+#include <math.h>
+
+
+/* ---------------------------------------- ROTATION ROUTINES
+*/
+void Rotate(int cx,int cy,int *x,int *y, double ang)
+{
+    double r,t;
+
+    TRACE;
+
+    ang=RAD(ang);
+
+    *x-=cx;
+    *y-=cy;
+
+    r=hypot((double)*x,(double)*y);
+    t=atan2((double)*y,(double)*x);
+
+    *x=(int)(r*cos(t+ang)+0.5);
+    *y=(int)(r*sin(t+ang)+0.5);
+
+    *x+=cx;
+    *y+=cy;
+}
+
+
+/* ---------------------------------------- SCALE ROUTINES
+*/
+void Scale(int cx,int cy,int *x,int *y, double sc)
+{
+    TRACE;
+
+    *x-=cx;
+    *y-=cy;
+
+    *x=(int)((*x)*sc);
+    *y=(int)((*y)*sc);
+
+    *x+=cx;
+    *y+=cy;
+}
+
+
+/* END OF FILE */