Dogcows Code - chaz/yoink/blob - src/moof/frustum.hh

   1
   2 /*]  Copyright (c) 2009-2010, Charles McGarvey  [**************************
   3 **]  All rights reserved.
   4 *
   5 * vi:ts=4 sw=4 tw=75
   6 *
   7 * Distributable under the terms and conditions of the 2-clause BSD license;
   8 * see the file COPYING for a complete text of the license.
   9 *
  10 **************************************************************************/
  11
  12 #ifndef _MOOF_FRUSTUM_HH_
  13 #define _MOOF_FRUSTUM_HH_
  14
  15 /**
  16  * \file frustum.hh
  17  * All things related to frustums!
  18  */
  19
  20 #include <moof/math.hh>
  21 #include <moof/plane.hh>
  22
  23
  24 namespace moof {
  25
  26
  27 template <int D> class aabb;
  28 template <int D> class sphere;
  29
  30
  31 /**
  32  * A six-sided volume for representing the space visible by a position
  33  * looking outward.
  34  */
  35 class frustum
  36 {
  37 public:
  38
  39         enum collision
  40         {
  41                 outside                 = 0,
  42                 inside                  = 1,
  43                 intersecting    = 2
  44         };
  45
  46         frustum() {}
  47         frustum(const matrix4& modelview, const matrix4& projection)
  48         {
  49                 init(modelview, projection);
  50         }
  51         frustum(const matrix4& modelview, scalar fovy, scalar aspect,
  52                         scalar abutting, scalar distant)
  53         {
  54                 init(modelview, fovy, aspect, abutting, distant);
  55         }
  56
  57         void init(const matrix4& modelview, const matrix4& projection);
  58         void init(const matrix4& modelview, scalar fovy, scalar aspect,
  59                           scalar abutting, scalar distant);
  60
  61         collision contains(const aabb<3>& aabb) const;
  62         collision contains(const sphere<3>& sphere) const;
  63
  64
  65 private:
  66
  67         plane planes_[6]; // left, right, bottom, top, near, far
  68 };
  69
  70
  71 } // namespace moof
  72
  73 #endif // _MOOF_FRUSTUM_HH_
  74