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Dogcows Code - chaz/yoink/blob - src/Moof/Octree.hh
d896844f0379a4ab7ca1cebe32d52cb5a719a775
2 /*******************************************************************************
4 Copyright (c) 2009, Charles McGarvey
7 Redistribution and use in source and binary forms, with or without
8 modification, are permitted provided that the following conditions are met:
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.
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.
27 *******************************************************************************/
29 #ifndef _MOOF_OCTREE_HH_
30 #define _MOOF_OCTREE_HH_
35 #include <boost/shared_ptr.hpp>
37 #include <stlplus/ntree.hpp>
39 #include <Moof/Aabb.hh>
40 #include <Moof/Drawable.hh>
41 #include <Moof/Entity.hh>
42 #include <Moof/Math.hh>
43 #include <Moof/Sphere.hh>
52 struct OctreeNode
: public Entity
54 std::list
<EntityPtr
> objects
;
58 aabb_
.min
= Vector3(-1.0, -1.0, -1.0);
59 aabb_
.max
= Vector3(1.0, 1.0, 1.0);
60 sphere_
.init(Vector3(0.0, 0.0, 0.0), 1.41421);
63 OctreeNode(const Aabb
& aabb
)
66 sphere_
.point
= aabb
.getCenter();
67 sphere_
.radius
= (aabb
.min
- sphere_
.point
).length();
70 void draw(Scalar alpha
) const
72 std::list
<EntityPtr
>::const_iterator it
;
74 for (it
= objects
.begin(); it
!= objects
.end(); ++it
)
79 //if (!objects.empty())
80 //aabb_.draw(); // temporary
83 void drawIfVisible(Scalar alpha
, const Camera
& cam
) const
85 std::list
<EntityPtr
>::const_iterator it
;
87 for (it
= objects
.begin(); it
!= objects
.end(); ++it
)
89 (*it
)->drawIfVisible(alpha
, cam
);
92 //if (!objects.empty())
97 bool isVisible(const Camera
& cam
) const
99 if (sphere_
.isVisible(cam
))
101 return aabb_
.isVisible(cam
);
108 static bool compareZOrder(EntityPtr a
, EntityPtr b
)
110 return a
->getSphere().point
[2] < b
->getSphere().point
[2];
115 //std::sort(objects.begin(), objects.end(), compareZOrder);
116 objects
.sort(compareZOrder
);
125 explicit Octree(const OctreeNode
& rootNode
)
127 tree_
.insert(rootNode
);
130 stlplus::ntree
<OctreeNode
>::iterator
insert(EntityPtr entity
)
132 return insert(tree_
.root(), entity
);
135 stlplus::ntree
<OctreeNode
>::iterator
reinsert(EntityPtr entity
,
136 stlplus::ntree
<OctreeNode
>::iterator node
);
138 void drawIfVisible(Scalar alpha
, const Camera
& cam
)
140 drawIfVisible(tree_
.root(), alpha
, cam
);
146 stlplus::ntree
<OctreeNode
>::iterator
insert(stlplus::ntree
<OctreeNode
>::iterator node
, EntityPtr entity
);
148 void addChild(stlplus::ntree
<OctreeNode
>::iterator node
, int index
);
150 void draw(stlplus::ntree
<OctreeNode
>::iterator node
, Scalar alpha
);
151 void drawIfVisible(stlplus::ntree
<OctreeNode
>::iterator node
,
152 Scalar alpha
, const Camera
& cam
);
154 stlplus::ntree
<OctreeNode
> tree_
;
157 typedef boost::shared_ptr
<Octree
> OctreePtr
;
162 #endif // _MOOF_OCTREE_HH_
164 /** vim: set ts=4 sw=4 tw=80: *************************************************/
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