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77 lines
3.6 KiB
77 lines
3.6 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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import com.jme3.math.Vector3f;
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import com.jme3.renderer.Camera;
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import com.jme3.terrain.Terrain;
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import com.jme3.terrain.geomipmap.lodcalc.LodCalculator;
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import java.util.List;
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/**
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* Updates grid offsets and cell positions.
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* As well as updating LOD.
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*
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* @author sploreg
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*/
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public class TerrainGridLodControl extends TerrainLodControl {
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public TerrainGridLodControl(Terrain terrain, Camera camera) {
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super(terrain, camera);
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}
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@Override
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protected void updateLOD(List<Vector3f> locations, LodCalculator lodCalculator) {
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TerrainGrid terrainGrid = (TerrainGrid)getSpatial();
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// for now, only the first camera is handled.
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// to accept more, there are two ways:
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// 1: every camera has an associated grid, then the location is not enough to identify which camera location has changed
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// 2: grids are associated with locations, and no incremental update is done, we load new grids for new locations, and unload those that are not needed anymore
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Vector3f cam = locations.isEmpty() ? Vector3f.ZERO.clone() : locations.get(0);
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Vector3f camCell = terrainGrid.getCamCell(cam); // get the grid index value of where the camera is (ie. 2,1)
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if (terrainGrid.cellsLoaded > 1) { // Check if cells are updated before updating gridoffset.
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terrainGrid.gridOffset[0] = Math.round(camCell.x * (terrainGrid.size / 2));
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terrainGrid.gridOffset[1] = Math.round(camCell.z * (terrainGrid.size / 2));
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terrainGrid.cellsLoaded = 0;
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}
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if (camCell.x != terrainGrid.currentCamCell.x || camCell.z != terrainGrid.currentCamCell.z || !terrainGrid.runOnce) {
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// if the camera has moved into a new cell, load new terrain into the visible 4 center quads
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terrainGrid.updateChildren(camCell);
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for (TerrainGridListener l : terrainGrid.listeners) {
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l.gridMoved(camCell);
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}
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}
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terrainGrid.runOnce = true;
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super.updateLOD(locations, lodCalculator);
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}
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}
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