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

   1
   2 /*]  Copyright (c) 2009-2011, Charles McGarvey  [*****************************
   3 **]  All rights reserved.
   4 *
   5 * Distributable under the terms and conditions of the 2-clause BSD license;
   6 * see the file COPYING for a complete text of the license.
   7 *
   8 *****************************************************************************/
   9
  10 #ifndef _MOOF_FRUSTUM_HH_
  11 #define _MOOF_FRUSTUM_HH_
  12
  13 #include <moof/math.hh>
  14 #include <moof/plane.hh>
  15
  16
  17 /**
  18  * \file frustum.hh
  19  * All things related to frustums!
  20  */
  21
  22 namespace moof {
  23
  24
  25 template <int D> class aabb;
  26 template <int D> class sphere;
  27
  28 /**
  29  * A six-sided volume for representing the space visible by a position looking
  30  * outward.
  31  */
  32 class frustum
  33 {
  34 public:
  35
  36         enum collision
  37         {
  38                 outside         = 0,
  39                 inside          = 1,
  40                 intersecting    = 2
  41         };
  42
  43         frustum() {}
  44         frustum(const matrix4& modelview, const matrix4& projection)
  45         {
  46                 init(modelview, projection);
  47         }
  48         frustum(const matrix4& modelview, scalar fovy, scalar aspect,
  49                         scalar abutting, scalar distant)
  50         {
  51                 init(modelview, fovy, aspect, abutting, distant);
  52         }
  53
  54         void init(const matrix4& modelview, const matrix4& projection);
  55         void init(const matrix4& modelview, scalar fovy, scalar aspect,
  56                         scalar abutting, scalar distant);
  57
  58         collision contains(const aabb<3>& aabb) const;
  59         collision contains(const sphere<3>& sphere) const;
  60
  61 private:
  62
  63         plane planes_[6]; // left, right, bottom, top, near, far
  64 };
  65
  66
  67 } // namespace moof
  68
  69 #endif // _MOOF_FRUSTUM_HH_
  70