Dogcows Code - chaz/yoink/blob - src/Moof/Aabb.hh

   1
   2 /*******************************************************************************
   3
   4  Copyright (c) 2009, Charles McGarvey
   5  All rights reserved.
   6
   7  Redistribution   and   use  in  source  and  binary  forms,  with  or  without
   8  modification, are permitted provided that the following conditions are met:
   9
  10    * Redistributions  of  source  code  must retain the above copyright notice,
  11      this list of conditions and the following disclaimer.
  12    * Redistributions  in binary form must reproduce the above copyright notice,
  13      this  list of conditions and the following disclaimer in the documentation
  14      and/or other materials provided with the distribution.
  15
  16  THIS  SOFTWARE  IS  PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  17  AND  ANY  EXPRESS  OR  IMPLIED  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  18  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  19  DISCLAIMED.  IN  NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
  20  FOR  ANY  DIRECT,  INDIRECT,  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  21  DAMAGES  (INCLUDING,  BUT  NOT  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  22  SERVICES;  LOSS  OF  USE,  DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  23  CAUSED  AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  24  OR  TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  25  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  26
  27 *******************************************************************************/
  28
  29 #ifndef _MOOF_AABB_HH_
  30 #define _MOOF_AABB_HH_
  31
  32 #include <Moof/Cullable.hh>
  33 #include <Moof/Drawable.hh>
  34 #include <Moof/Math.hh>
  35 #include <Moof/Plane.hh>
  36
  37
  38 namespace Mf {
  39
  40
  41 /**
  42  * Axis-aligned Bounding Box
  43  */
  44
  45 struct Aabb : public Cullable, public Drawable
  46 {
  47         Vector3 min;
  48         Vector3 max;
  49
  50
  51         Aabb() {}
  52
  53         Aabb(const Vector3& a, const Vector3& b)
  54         {
  55                 init(a, b);
  56         }
  57
  58         Aabb(Scalar ax, Scalar ay, Scalar az,
  59                         Scalar bx, Scalar by, Scalar bz)
  60         {
  61                 Vector3 a(ax, ay, az);
  62                 Vector3 b(bx, by, bz);
  63
  64                 init(a, b);
  65         }
  66
  67         inline void init(const Vector3& a, const Vector3& b)
  68         {
  69                 if (a[0] < b[0])
  70                 {
  71                         min[0] = a[0];
  72                         max[0] = b[0];
  73                 }
  74                 else
  75                 {
  76                         min[0] = b[0];
  77                         max[0] = a[0];
  78                 }
  79                 if (a[1] < b[1])
  80                 {
  81                         min[1] = a[1];
  82                         max[1] = b[1];
  83                 }
  84                 else
  85                 {
  86                         min[1] = b[1];
  87                         max[1] = a[1];
  88                 }
  89                 if (a[2] < b[2])
  90                 {
  91                         min[2] = a[2];
  92                         max[2] = b[2];
  93                 }
  94                 else
  95                 {
  96                         min[2] = b[2];
  97                         max[2] = a[2];
  98                 }
  99         }
 100
 101         inline Vector3 getCenter() const
 102         {
 103                 return Vector3((min[0] + max[0]) / 2.0,
 104                                            (min[1] + max[1]) / 2.0,
 105                                            (min[2] + max[2]) / 2.0);
 106         }
 107
 108         void getOctant(Aabb& octant, int num) const;
 109
 110         inline Plane getPlaneXY() const
 111         {
 112                 Plane plane;
 113                 plane.normal = Vector3(0.0, 0.0, 1.0);
 114                 plane.d = cml::dot(-plane.normal, getCenter());
 115                 return plane;
 116         }
 117
 118         inline Plane getPlaneXZ() const
 119         {
 120                 Plane plane;
 121                 plane.normal = Vector3(0.0, 1.0, 0.0);
 122                 plane.d = cml::dot(-plane.normal, getCenter());
 123                 return plane;
 124         }
 125
 126         inline Plane getPlaneYZ() const
 127         {
 128                 Plane plane;
 129                 plane.normal = Vector3(1.0, 0.0, 0.0);
 130                 plane.d = cml::dot(-plane.normal, getCenter());
 131                 return plane;
 132         }
 133
 134         void getCorners(Vector3 corners[8]) const;
 135
 136         void encloseVertices(const Vector3 vertices[], unsigned count);
 137
 138         void draw(Scalar alpha = 0.0) const;
 139         bool isVisible(const Camera& cam) const;
 140 };
 141
 142
 143 } // namespace Mf
 144
 145 #endif // _MOOF_AABB_HH_
 146
 147 /** vim: set ts=4 sw=4 tw=80: *************************************************/
 148