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81 lines
3.0 KiB
81 lines
3.0 KiB
/*
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* Copyright (c) 2009-2012 jMonkeyEngine
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* * Neither the name of 'jMonkeyEngine' nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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package com.jme3.terrain.geomipmap;
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/**
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* Used for TerrainQuad to find neighbours that are not part of the
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* same quad tree. Normally TerrainQuads function in a quad tree and
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* use the neighbour methods getRightQuad, getLeftQuad etc. to update
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* LOD values of the terrain (and for some other routines).
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*
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* With this you can have a parent, control or spatial, that manages a group of
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* TerrainQuads by linking them together through these four methods.
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*
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* The general orientation of TerrainQuads and their sub-quads is as such:
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*
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*
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* +-- x+ ---->
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* |
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* | 1 | 3 (quadrants)
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* z+ --+--
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* | 2 | 4
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* |
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* \/
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*
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* Your implementation will still have to manage getHeight, getNormal, and
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* most other Terrain.java interface methods; often by offsetting the XZ
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* coordinate parameters.
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*
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* @author sploreg
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*/
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public interface NeighbourFinder {
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/**
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* Get the TerrainQuad to the right of the supplied 'center' quad.
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*/
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public TerrainQuad getRightQuad(TerrainQuad center);
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/**
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* Get the TerrainQuad to the left of the supplied 'center' quad.
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*/
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public TerrainQuad getLeftQuad(TerrainQuad center);
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/**
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* Get the TerrainQuad above the supplied 'center' quad.
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*/
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public TerrainQuad getTopQuad(TerrainQuad center);
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/**
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* Get the TerrainQuad below the supplied 'center' quad.
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*/
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public TerrainQuad getDownQuad(TerrainQuad center);
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}
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