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