diff options
Diffstat (limited to 'engine/src/terrain/com/jme3/terrain/geomipmap/TerrainLodControl.java')
| -rw-r--r-- | engine/src/terrain/com/jme3/terrain/geomipmap/TerrainLodControl.java | 210 |
1 files changed, 210 insertions, 0 deletions
diff --git a/engine/src/terrain/com/jme3/terrain/geomipmap/TerrainLodControl.java b/engine/src/terrain/com/jme3/terrain/geomipmap/TerrainLodControl.java new file mode 100644 index 0000000..aedd744 --- /dev/null +++ b/engine/src/terrain/com/jme3/terrain/geomipmap/TerrainLodControl.java @@ -0,0 +1,210 @@ +/*
+ * Copyright (c) 2009-2010 jMonkeyEngine
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * * Neither the name of 'jMonkeyEngine' nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+package com.jme3.terrain.geomipmap;
+
+import com.jme3.export.InputCapsule;
+import com.jme3.export.JmeExporter;
+import com.jme3.export.JmeImporter;
+import com.jme3.export.OutputCapsule;
+import com.jme3.math.Vector3f;
+import com.jme3.renderer.Camera;
+import com.jme3.renderer.RenderManager;
+import com.jme3.renderer.ViewPort;
+import com.jme3.scene.Node;
+import com.jme3.scene.Spatial;
+import com.jme3.scene.control.AbstractControl;
+import com.jme3.scene.control.Control;
+import com.jme3.terrain.Terrain;
+import com.jme3.terrain.geomipmap.lodcalc.DistanceLodCalculator;
+import com.jme3.terrain.geomipmap.lodcalc.LodCalculator;
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Tells the terrain to update its Level of Detail.
+ * It needs the cameras to do this, and there could possibly
+ * be several cameras in the scene, so it accepts a list
+ * of cameras.
+ * NOTE: right now it just uses the first camera passed in,
+ * in the future it will use all of them to determine what
+ * LOD to set.
+ *
+ * This control serializes, but it does not save the Camera reference.
+ * This camera reference has to be manually added in when you load the
+ * terrain to the scene!
+ *
+ * @author Brent Owens
+ */
+public class TerrainLodControl extends AbstractControl {
+
+ private Terrain terrain;
+ private List<Camera> cameras;
+ private List<Vector3f> cameraLocations = new ArrayList<Vector3f>();
+ private LodCalculator lodCalculator;
+ private boolean hasResetLod = false; // used when enabled is set to false
+
+ public TerrainLodControl() {
+ }
+
+ public TerrainLodControl(Terrain terrain, Camera camera) {
+ List<Camera> cams = new ArrayList<Camera>();
+ cams.add(camera);
+ this.terrain = terrain;
+ this.cameras = cams;
+ lodCalculator = new DistanceLodCalculator(65, 2.7f); // a default calculator
+ }
+
+ /**
+ * Only uses the first camera right now.
+ * @param terrain to act upon (must be a Spatial)
+ * @param cameras one or more cameras to reference for LOD calc
+ */
+ public TerrainLodControl(Terrain terrain, List<Camera> cameras) {
+ this.terrain = terrain;
+ this.cameras = cameras;
+ lodCalculator = new DistanceLodCalculator(65, 2.7f); // a default calculator
+ }
+
+ @Override
+ protected void controlRender(RenderManager rm, ViewPort vp) {
+ }
+
+ @Override
+ public void update(float tpf) {
+ controlUpdate(tpf);
+ }
+
+ @Override
+ protected void controlUpdate(float tpf) {
+ //list of cameras for when terrain supports multiple cameras (ie split screen)
+
+ if (lodCalculator == null)
+ return;
+
+ if (!enabled) {
+ if (!hasResetLod) {
+ // this will get run once
+ hasResetLod = true;
+ lodCalculator.turnOffLod();
+ }
+ }
+
+ if (cameras != null) {
+ if (cameraLocations.isEmpty() && !cameras.isEmpty()) {
+ for (Camera c : cameras) // populate them
+ {
+ cameraLocations.add(c.getLocation());
+ }
+ }
+ terrain.update(cameraLocations, lodCalculator);
+ }
+ }
+
+ public Control cloneForSpatial(Spatial spatial) {
+ if (spatial instanceof Terrain) {
+ List<Camera> cameraClone = new ArrayList<Camera>();
+ if (cameras != null) {
+ for (Camera c : cameras) {
+ cameraClone.add(c);
+ }
+ }
+ TerrainLodControl cloned = new TerrainLodControl((Terrain) spatial, cameraClone);
+ cloned.setLodCalculator(lodCalculator.clone());
+ return cloned;
+ }
+ return null;
+ }
+
+ public void setCamera(Camera camera) {
+ List<Camera> cams = new ArrayList<Camera>();
+ cams.add(camera);
+ setCameras(cams);
+ }
+
+ public void setCameras(List<Camera> cameras) {
+ this.cameras = cameras;
+ cameraLocations.clear();
+ for (Camera c : cameras) {
+ cameraLocations.add(c.getLocation());
+ }
+ }
+
+ @Override
+ public void setSpatial(Spatial spatial) {
+ super.setSpatial(spatial);
+ if (spatial instanceof Terrain) {
+ this.terrain = (Terrain) spatial;
+ }
+ }
+
+ public void setTerrain(Terrain terrain) {
+ this.terrain = terrain;
+ }
+
+ public LodCalculator getLodCalculator() {
+ return lodCalculator;
+ }
+
+ public void setLodCalculator(LodCalculator lodCalculator) {
+ this.lodCalculator = lodCalculator;
+ }
+
+ @Override
+ public void setEnabled(boolean enabled) {
+ this.enabled = enabled;
+ if (!enabled) {
+ // reset the lod levels to max detail for the terrain
+ hasResetLod = false;
+ } else {
+ hasResetLod = true;
+ lodCalculator.turnOnLod();
+ }
+ }
+
+ @Override
+ public void write(JmeExporter ex) throws IOException {
+ super.write(ex);
+ OutputCapsule oc = ex.getCapsule(this);
+ oc.write((Node)terrain, "terrain", null);
+ oc.write(lodCalculator, "lodCalculator", null);
+ }
+
+ @Override
+ public void read(JmeImporter im) throws IOException {
+ super.read(im);
+ InputCapsule ic = im.getCapsule(this);
+ terrain = (Terrain) ic.readSavable("terrain", null);
+ lodCalculator = (LodCalculator) ic.readSavable("lodCalculator", new DistanceLodCalculator());
+ }
+
+}
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