1 /******************************************************************************
2  *  Warmux is a convivial mass murder game.
3  *  Copyright (C) 2001-2011 Warmux Team.
4  *
5  *  This program is free software; you can redistribute it and/or modify
6  *  it under the terms of the GNU General Public License as published by
7  *  the Free Software Foundation; either version 2 of the License, or
8  *  (at your option) any later version.
9  *
10  *  This program is distributed in the hope that it will be useful,
11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13  *  GNU General Public License for more details.
14  *
15  *  You should have received a copy of the GNU General Public License
16  *  along with this program; if not, write to the Free Software
17  *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
18  ******************************************************************************
19  * 2D Affine Transformation.
20  *****************************************************************************/
21 
22 #ifndef AFFINE_TRANSFORM_2D
23 #define AFFINE_TRANSFORM_2D
24 
25 #include <WARMUX_types.h>
26 #include <stdio.h>
27 #include <WARMUX_point.h>
28 
29 class AffineTransform2D {
30  protected:
31   // The matrix
32   Double x1, x2, xt;
33   Double y1, y2, yt;
34   Double w1, w2, wt;
35  public:
36   AffineTransform2D();
37   void Init();
38   void Set(const AffineTransform2D &mat);
39   void SetRotation(Double rad_angle);
40   void SetTranslation(Double trans_x, Double trans_y);
41   void SetTranslation(const Point2i & position);
42   void SetTranslation(const Point2d & position);
43   void SetShrink(Double shrink_x, Double shrink_y);
44   void SetShear(Double shear_x, Double shear_y);
45   void SetTranslationAnimation(int start_time, int duration, int time, bool invert, const Point2d & start, const Point2d & end);
46   void SetRotationAnimation(int start_time, int duration, int time, bool invert, Double angle_start, Double angle_end = 0.0);
47   void SetShrinkAnimation(int start_time, int duration, int time, bool invert, Double shrink_x_start, Double shrink_y_start,
48                           Double shrink_x_end = 1.0, Double shrink_y_end = 1.0);
49   void SetShearAnimation(int start_time, int duration, int time, bool invert, Double shear_tremor,
50                          Double shear_x_start, Double shear_y_start,
51                          Double shear_x_end = 0.0, Double shear_y_end = 0.0);
52   /* Matrix multiplication */
53   AffineTransform2D operator*(const AffineTransform2D &mat) const;
54   Point2i operator*(const Point2i& p) const;
55   Point2d operator*(const Point2d& p) const;
56   // Creation of instance
57   static AffineTransform2D Rotate(Double rad_angle);
58   static AffineTransform2D Translate(Double trans_x, Double trans_y);
59   static AffineTransform2D Shrink(Double shrink_x, Double shrink_y);
60   static AffineTransform2D Shear(Double shear_x, Double shear_y);
61 };
62 
63 #endif /* AFFINE_TRANSFORM_2D */
64