super-tux-commit

[Matze B. <mat...@us...>]

Update of /cvsroot/super-tux/supertux/lib/math
In directory sc8-pr-cvs1.sourceforge.net:/tmp/cvs-serv8067/lib/math

Added Files:
	aatriangle.h rectangle.h 
Log Message:
forgot to add some files

--- NEW FILE: rectangle.h ---
#ifndef __RECTANGLE_H__
#define __RECTANGLE_H__

#include <assert.h>
#include "vector.h"

namespace SuperTux
{

/** This class represents a rectangle.
 * (Implementation Note) We're using upper left and lower right point instead of
 * upper left and width/height here, because that makes the collision dectection
 * a little bit efficienter.
 */
class Rectangle
{
public:
  Rectangle()
  { }

  Rectangle(const Vector& np1, const Vector& np2)
    : p1(np1), p2(np2)
  {
  }

  Rectangle(float x1, float y1, float x2, float y2)
    : p1(x1, y1), p2(x2, y2)
  {
    assert(p1.x <= p2.x && p1.y <= p2.y);
  }

  float get_width() const
  { return p2.x - p1.x; }

  float get_height() const
  { return p2.y - p1.y; }

  Vector get_middle() const
  { return Vector((p1.x+p2.x)/2, (p1.y+p2.y)/2); }

  void set_pos(const Vector& v)
  {
    move(v-p1);
  }

  void set_height(float height)
  {
    p2.y = p1.y + height;
  }
  void set_width(float width)
  {
    p2.x = p1.x + width;
  }
  void set_size(float width, float height)
  {
    set_width(width);
    set_height(height);
  }                                         

  void move(const Vector& v)
  {
    p1 += v;
    p2 += v;
  }

  bool inside(const Vector& v) const
  {
    return v.x >= p1.x && v.y >= p1.y && v.x < p2.x && v.y < p2.y;
  }
  bool inside(const Rectangle& other) const
  {
    if(p1.x >= other.p2.x || other.p1.x >= p2.x)
      return false;
    if(p1.y >= other.p2.y || other.p1.y >= p2.y)
      return false;

    return true;
  }
   
  // leave these 2 public to safe the headaches of set/get functions for such
  // simple things :)

  /// upper left edge
  Vector p1;
  /// lower right edge
  Vector p2;
};

}

#endif


--- NEW FILE: aatriangle.h ---
#ifndef __AATRIANGLE_H__
#define __AATRIANGLE_H__

#include "rectangle.h"

namespace SuperTux
{

/**
 * An axis aligned triangle (ie. a triangle where 2 sides are parallel to the x-
 * and y-axis.
 */
class AATriangle : public Rectangle
{
public:
  /** Directions:
   *
   *    SOUTHEWEST    NORTHEAST   SOUTHEAST    NORTHWEST
   *    *      or      *---*   or      *    or *---* 
   *    | \             \  |         / |       |  /
   *    |  \             \ |        /  |       | /
   *    *---*              *       *---*       *
   */
  enum Direction {
    SOUTHWEST, NORTHEAST, SOUTHEAST, NORTHWEST
  };

  AATriangle()
    : dir(SOUTHWEST)
  {
  }
  AATriangle(const Vector& v1, const Vector& v2, Direction newdir)
    : Rectangle(v1, v2), dir(newdir)
  {
  }

  Direction dir;
};

}

#endif