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Dogcows Code - chaz/yoink/blob - src/Moof/Octree.hh
4dc0c5c7e460e801594585200e47d3a70bc34064
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>
53 typedef stlplus::ntree
<OctreeNode
>::iterator OctreeNodeP
;
56 typedef boost::shared_ptr
<Octree
> OctreeP
;
59 struct OctreeNode
: public Entity
61 std::list
<EntityP
> objects
;
65 aabb_
.min
= Vector3(-1.0, -1.0, -1.0);
66 aabb_
.max
= Vector3(1.0, 1.0, 1.0);
67 sphere_
.init(Vector3(0.0, 0.0, 0.0), 1.41421);
70 OctreeNode(const Aabb
& aabb
)
73 sphere_
.point
= aabb
.getCenter();
74 sphere_
.radius
= (aabb
.min
- sphere_
.point
).length();
77 void draw(Scalar alpha
) const
79 std::list
<EntityP
>::const_iterator it
;
81 for (it
= objects
.begin(); it
!= objects
.end(); ++it
)
87 aabb_
.draw(); // temporary
90 void drawIfVisible(Scalar alpha
, const Camera
& cam
) const
92 std::list
<EntityP
>::const_iterator it
;
94 for (it
= objects
.begin(); it
!= objects
.end(); ++it
)
96 (*it
)->drawIfVisible(alpha
, cam
);
104 bool isVisible(const Camera
& cam
) const
106 if (sphere_
.isVisible(cam
))
108 return aabb_
.isVisible(cam
);
115 static bool compareZOrder(EntityP a
, EntityP b
)
117 return a
->getSphere().point
[2] < b
->getSphere().point
[2];
122 //std::sort(objects.begin(), objects.end(), compareZOrder);
123 objects
.sort(compareZOrder
);
130 OctreeNodeP
insert(EntityP entity
, OctreeNodeP node
);
132 void addChild(OctreeNodeP node
, int index
);
134 void draw(Scalar alpha
, OctreeNodeP node
);
135 void drawIfVisible(Scalar alpha
, const Camera
& cam
, OctreeNodeP node
);
137 stlplus::ntree
<OctreeNode
> tree_
;
141 inline static OctreeP
alloc(const OctreeNode
& rootNode
)
143 return OctreeP(new Octree(rootNode
));
146 explicit Octree(const OctreeNode
& rootNode
)
148 tree_
.insert(rootNode
);
151 OctreeNodeP
insert(EntityP entity
)
153 return insert(entity
, tree_
.root());
156 OctreeNodeP
reinsert(EntityP entity
, OctreeNodeP node
);
158 void drawIfVisible(Scalar alpha
, const Camera
& cam
)
160 drawIfVisible(alpha
, cam
, tree_
.root());
169 #endif // _MOOF_OCTREE_HH_
171 /** vim: set ts=4 sw=4 tw=80: *************************************************/
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