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package jme3test.terrain;
import com.jme3.app.SimpleApplication;
import com.jme3.font.BitmapText;
import com.jme3.input.KeyInput;
import com.jme3.input.controls.ActionListener;
import com.jme3.input.controls.KeyTrigger;
import com.jme3.light.DirectionalLight;
import com.jme3.light.PointLight;
import com.jme3.material.Material;
import com.jme3.math.ColorRGBA;
import com.jme3.math.Vector3f;
import com.jme3.scene.Geometry;
import com.jme3.terrain.geomipmap.TerrainLodControl;
import com.jme3.terrain.geomipmap.TerrainQuad;
import com.jme3.terrain.geomipmap.lodcalc.DistanceLodCalculator;
import com.jme3.terrain.heightmap.AbstractHeightMap;
import com.jme3.terrain.heightmap.ImageBasedHeightMap;
import com.jme3.texture.Texture;
import com.jme3.texture.Texture.WrapMode;
/**
* Demonstrates how to use terrain.
* The base terrain class it uses is TerrainQuad, which is a quad tree of actual
* meshes called TerainPatches.
* There are a couple options for the terrain in this test:
* The first is wireframe mode. Here you can see the underlying trianglestrip structure.
* You will notice some off lines; these are degenerate triangles and are part of the
* trianglestrip. They are only noticeable in wireframe mode.
* Second is Tri-Planar texture mode. Here the textures are rendered on all 3 axes and
* then blended together to reduce distortion and stretching.
* Third, which you have to modify the code to see, is Entropy LOD calculations.
* In the constructor for the TerrainQuad, un-comment the final parameter that is
* the LodPerspectiveCalculatorFactory. Then you will see the terrain flicker to start
* while it calculates the entropies. Once it is done, it will pick the best LOD value
* based on entropy. This method reduces "popping" of terrain greatly when LOD levels
* change. It is highly suggested you use it in your app.
*
* @author bowens
*/
public class TerrainTest extends SimpleApplication {
private TerrainQuad terrain;
Material matRock;
Material matWire;
boolean wireframe = false;
boolean triPlanar = false;
protected BitmapText hintText;
PointLight pl;
Geometry lightMdl;
private float grassScale = 64;
private float dirtScale = 16;
private float rockScale = 128;
public static void main(String[] args) {
TerrainTest app = new TerrainTest();
app.start();
}
@Override
public void initialize() {
super.initialize();
loadHintText();
}
@Override
public void simpleInitApp() {
setupKeys();
// First, we load up our textures and the heightmap texture for the terrain
// TERRAIN TEXTURE material
matRock = new Material(assetManager, "Common/MatDefs/Terrain/Terrain.j3md");
matRock.setBoolean("useTriPlanarMapping", false);
// ALPHA map (for splat textures)
matRock.setTexture("Alpha", assetManager.loadTexture("Textures/Terrain/splat/alphamap.png"));
// HEIGHTMAP image (for the terrain heightmap)
Texture heightMapImage = assetManager.loadTexture("Textures/Terrain/splat/mountains512.png");
// GRASS texture
Texture grass = assetManager.loadTexture("Textures/Terrain/splat/grass.jpg");
grass.setWrap(WrapMode.Repeat);
matRock.setTexture("Tex1", grass);
matRock.setFloat("Tex1Scale", grassScale);
// DIRT texture
Texture dirt = assetManager.loadTexture("Textures/Terrain/splat/dirt.jpg");
dirt.setWrap(WrapMode.Repeat);
matRock.setTexture("Tex2", dirt);
matRock.setFloat("Tex2Scale", dirtScale);
// ROCK texture
Texture rock = assetManager.loadTexture("Textures/Terrain/splat/road.jpg");
rock.setWrap(WrapMode.Repeat);
matRock.setTexture("Tex3", rock);
matRock.setFloat("Tex3Scale", rockScale);
// WIREFRAME material
matWire = new Material(assetManager, "Common/MatDefs/Misc/Unshaded.j3md");
matWire.getAdditionalRenderState().setWireframe(true);
matWire.setColor("Color", ColorRGBA.Green);
// CREATE HEIGHTMAP
AbstractHeightMap heightmap = null;
try {
//heightmap = new HillHeightMap(1025, 1000, 50, 100, (byte) 3);
heightmap = new ImageBasedHeightMap(heightMapImage.getImage(), 1f);
heightmap.load();
} catch (Exception e) {
e.printStackTrace();
}
/*
* Here we create the actual terrain. The tiles will be 65x65, and the total size of the
* terrain will be 513x513. It uses the heightmap we created to generate the height values.
*/
/**
* Optimal terrain patch size is 65 (64x64).
* The total size is up to you. At 1025 it ran fine for me (200+FPS), however at
* size=2049, it got really slow. But that is a jump from 2 million to 8 million triangles...
*/
terrain = new TerrainQuad("terrain", 65, 513, heightmap.getHeightMap());
TerrainLodControl control = new TerrainLodControl(terrain, getCamera());
control.setLodCalculator( new DistanceLodCalculator(65, 2.7f) ); // patch size, and a multiplier
terrain.addControl(control);
terrain.setMaterial(matRock);
terrain.setLocalTranslation(0, -100, 0);
terrain.setLocalScale(2f, 0.5f, 2f);
rootNode.attachChild(terrain);
DirectionalLight light = new DirectionalLight();
light.setDirection((new Vector3f(-0.5f, -1f, -0.5f)).normalize());
rootNode.addLight(light);
cam.setLocation(new Vector3f(0, 10, -10));
cam.lookAtDirection(new Vector3f(0, -1.5f, -1).normalizeLocal(), Vector3f.UNIT_Y);
}
public void loadHintText() {
hintText = new BitmapText(guiFont, false);
hintText.setSize(guiFont.getCharSet().getRenderedSize());
hintText.setLocalTranslation(0, getCamera().getHeight(), 0);
hintText.setText("Hit T to switch to wireframe, P to switch to tri-planar texturing");
guiNode.attachChild(hintText);
}
private void setupKeys() {
flyCam.setMoveSpeed(50);
inputManager.addMapping("wireframe", new KeyTrigger(KeyInput.KEY_T));
inputManager.addListener(actionListener, "wireframe");
inputManager.addMapping("triPlanar", new KeyTrigger(KeyInput.KEY_P));
inputManager.addListener(actionListener, "triPlanar");
}
private ActionListener actionListener = new ActionListener() {
public void onAction(String name, boolean pressed, float tpf) {
if (name.equals("wireframe") && !pressed) {
wireframe = !wireframe;
if (!wireframe) {
terrain.setMaterial(matWire);
} else {
terrain.setMaterial(matRock);
}
} else if (name.equals("triPlanar") && !pressed) {
triPlanar = !triPlanar;
if (triPlanar) {
matRock.setBoolean("useTriPlanarMapping", true);
// planar textures don't use the mesh's texture coordinates but real world coordinates,
// so we need to convert these texture coordinate scales into real world scales so it looks
// the same when we switch to/from tr-planar mode
matRock.setFloat("Tex1Scale", 1f / (float) (512f / grassScale));
matRock.setFloat("Tex2Scale", 1f / (float) (512f / dirtScale));
matRock.setFloat("Tex3Scale", 1f / (float) (512f / rockScale));
} else {
matRock.setBoolean("useTriPlanarMapping", false);
matRock.setFloat("Tex1Scale", grassScale);
matRock.setFloat("Tex2Scale", dirtScale);
matRock.setFloat("Tex3Scale", rockScale);
}
}
}
};
}