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authorIan C <ianc@noddybox.co.uk>2011-06-09 13:57:32 +0000
committerIan C <ianc@noddybox.co.uk>2011-06-09 13:57:32 +0000
commit0f12083fdb14ae813e419500918b95cb83070586 (patch)
tree93f855836faede895a4c37d12dcc46a8c5fbb835 /editsrot.c
Added copies of old numbered releases.0.01
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+/*
+
+ 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 */