Dogcows Code - chaz/yoink/blob - src/Moof/Octree.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_OCTREE_HH_
  30 #define _MOOF_OCTREE_HH_
  31
  32 #include <algorithm>
  33 #include <list>
  34
  35 #include <boost/shared_ptr.hpp>
  36
  37 #include <stlplus/ntree.hpp>
  38
  39 #include <Moof/Aabb.hh>
  40 #include <Moof/Drawable.hh>
  41 #include <Moof/Entity.hh>
  42 #include <Moof/Log.hh>
  43 #include <Moof/Math.hh>
  44 #include <Moof/Sphere.hh>
  45
  46
  47 namespace Mf {
  48
  49
  50 class Camera;
  51
  52
  53 struct OctreeNode;
  54 typedef stlplus::ntree<OctreeNode>::iterator OctreeNodeP;
  55
  56 class Octree;
  57 typedef boost::shared_ptr<Octree> OctreeP;
  58
  59
  60 struct OctreeNode : public Entity
  61 {
  62         std::list<EntityP> objects;
  63
  64         OctreeNode()
  65         {
  66                 aabb_.min = Vector3(-1.0, -1.0, -1.0);
  67                 aabb_.max = Vector3(1.0, 1.0, 1.0);
  68                 sphere_.init(Vector3(0.0, 0.0, 0.0), 1.41421);
  69         }
  70
  71         OctreeNode(const Aabb& aabb)
  72         {
  73                 aabb_ = aabb;
  74                 sphere_.point = aabb.getCenter();
  75                 sphere_.radius = (aabb.min - sphere_.point).length();
  76         }
  77
  78         void draw(Scalar alpha) const
  79         {
  80                 std::list<EntityP>::const_iterator it;
  81
  82                 for (it = objects.begin(); it != objects.end(); ++it)
  83                 {
  84                         (*it)->draw(alpha);
  85                 }
  86
  87                 if (!objects.empty())
  88                         aabb_.draw(); // temporary
  89         }
  90
  91         void drawIfVisible(Scalar alpha, const Camera& cam) const
  92         {
  93                 std::list<EntityP>::const_iterator it;
  94
  95                 for (it = objects.begin(); it != objects.end(); ++it)
  96                 {
  97                         (*it)->drawIfVisible(alpha, cam);
  98                 }
  99
 100                 if (!objects.empty())
 101                         aabb_.draw();
 102         }
 103
 104
 105         bool isVisible(const Camera& cam) const
 106         {
 107                 if (sphere_.isVisible(cam))
 108                 {
 109                         return aabb_.isVisible(cam);
 110                 }
 111
 112                 return false;
 113         }
 114
 115
 116         static bool compareZOrder(EntityP a, EntityP b)
 117         {
 118                 return a->getSphere().point[2] < b->getSphere().point[2];
 119         }
 120
 121         void sort()
 122         {
 123                 //std::sort(objects.begin(), objects.end(), compareZOrder);
 124                 objects.sort(compareZOrder);
 125         }
 126 };
 127
 128
 129 class Octree
 130 {
 131         OctreeNodeP insert(EntityP entity, OctreeNodeP node);
 132
 133         void addChild(OctreeNodeP node, int index);
 134
 135         void draw(Scalar alpha, OctreeNodeP node);
 136         void drawIfVisible(Scalar alpha, const Camera& cam, OctreeNodeP node);
 137
 138         stlplus::ntree<OctreeNode> tree_;
 139
 140 public:
 141
 142         inline void print(OctreeNodeP node)
 143         {
 144                 logDebug("-----");
 145                 logDebug("depth to node: %d", tree_.depth(node));
 146                 logDebug("size of node: %d", tree_.size(node));
 147         }
 148
 149         inline static OctreeP alloc(const OctreeNode& rootNode)
 150         {
 151                 return OctreeP(new Octree(rootNode));
 152         }
 153
 154         explicit Octree(const OctreeNode& rootNode)
 155         {
 156                 tree_.insert(rootNode);
 157         }
 158
 159         OctreeNodeP insert(EntityP entity)
 160         {
 161                 return insert(entity, tree_.root());
 162         }
 163
 164         OctreeNodeP reinsert(EntityP entity, OctreeNodeP node);
 165
 166         void drawIfVisible(Scalar alpha, const Camera& cam)
 167         {
 168                 drawIfVisible(alpha, cam, tree_.root());
 169         }
 170
 171         void sort();
 172 };
 173
 174
 175 } // namespace Mf
 176
 177 #endif // _MOOF_OCTREE_HH_
 178
 179 /** vim: set ts=4 sw=4 tw=80: *************************************************/
 180