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/*
SABRE Fighter Plane Simulator
Copyright (c) 1997 Dan Hammer
Portions Donated By Antti Barck
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 1, 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/****************************************************************
* rotate.cpp *
* 2D Point Rotation *
****************************************************************/
#include <stdio.h>
#include <stdlib.h>
#include <values.h>
#include <time.h>
#include <string.h>
#include <math.h>
#include <iostream.h>
#include "defs.h"
#include "grafix.h"
#include "vga_13.h"
#include "pen.h"
#include "convpoly.h"
#include "vmath.h"
#include "rotate.h"
Point point_rotate(Point p, REAL_TYPE cx, REAL_TYPE cy,
REAL_TYPE sin_ang, REAL_TYPE cos_ang)
{
REAL_TYPE rx,ry,rx1,ry1;
Point result;
rx = REAL_TYPE(p.x) - cx;
ry = REAL_TYPE(p.y) - cy;
rx1 = (rx * cos_ang) + (ry * sin_ang) + cx;
ry1 = (((-rx) * sin_ang) + (ry * cos_ang)) + cy;
result.x = (int) (rx1);
result.y = (int) (ry1);
return result;
}
Point point_rotate(Point p, Point c, REAL_TYPE sin_ang, REAL_TYPE cos_ang)
{
REAL_TYPE cx,cy;
REAL_TYPE rx,ry,rx1,ry1;
Point result;
cx = REAL_TYPE(c.x);
cy = REAL_TYPE(c.y);
rx = REAL_TYPE(p.x) - cx;
ry = REAL_TYPE(p.y) - cy;
rx1 = (rx * cos_ang) + (ry * sin_ang) + cx;
ry1 = (((-rx) * sin_ang) + (ry * cos_ang)) + cy;
result.x = (int) rx1;
result.y = (int) ( ry1);
return result;
}
Point point_rotate(Point p, Point c, REAL_TYPE ang)
{
return point_rotate(p,c,sin(ang),cos(ang));
}
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