git-svn-id: https://jmonkeyengine.googlecode.com/svn/trunk@9270 75d07b2b-3a1a-0410-a2c5-0572b91ccdca3.0
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/* |
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* To change this template, choose Tools | Templates |
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* and open the template in the editor. |
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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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