Hi there,
I’m actually playing around with custom mesh shapes.
While creating them now works fine for me, saving them in a j3o file seems to cause problems.
I wrote some code in which I create a custom mesh and add it to the root node.
Then I save the root node in a j3o file.
When I try to load this file in the SceneComposer i get a NullPointerException: Box has null mesh.
Can this behaviour be changed?
Here is my code:
Main.java:
[java]package mygame;
import com.jme3.app.SimpleApplication;
import com.jme3.export.binary.BinaryExporter;
import com.jme3.material.Material;
import com.jme3.math.ColorRGBA;
import com.jme3.math.Vector3f;
import com.jme3.renderer.RenderManager;
import com.jme3.scene.Geometry;
import java.io.File;
import java.io.IOException;
/**
-
test
-
@author brother.byto
*/
public class Main extends SimpleApplication {public static void main(String[] args) {
Main app = new Main();
app.start();
}@Override
public void simpleInitApp() {
//Box b = new Box(Vector3f.ZERO, 1, 1, 1);BigPoint a = new BigPoint(new Vector3f(0,1,0), new Vector3f(0,0,10)); BigPoint b = new BigPoint(new Vector3f(0,0,5), new Vector3f(0,0,0)); TileMesh mesh = new TileMesh(a,b,3); Geometry geom = new Geometry("Box", mesh); Material mat = new Material(assetManager, "Common/MatDefs/Misc/Unshaded.j3md"); mat.setColor("Color", ColorRGBA.Blue); geom.setMaterial(mat); rootNode.attachChild(geom); BinaryExporter exporter = BinaryExporter.getInstance(); File file = new File("./assets/Models/test.j3o"); try { exporter.save(rootNode, file); } catch (IOException e) { System.err.println("Error: " + e.getMessage()); }}
@Override
public void simpleUpdate(float tpf) {
//TODO: add update code
}@Override
public void simpleRender(RenderManager rm) {
//TODO: add render code
}
}
[/java]
TileMesh.java:
[java]package mygame;
import com.jme3.math.FastMath;
import com.jme3.math.Quaternion;
import com.jme3.math.Vector2f;
import com.jme3.math.Vector3f;
import com.jme3.scene.Mesh;
import com.jme3.scene.VertexBuffer.Type;
import com.jme3.util.BufferUtils;
/**
*
-
@author brother.byto
*/
public class TileMesh extends Mesh {Vector3f [] vertices = new Vector3f[8];
Vector2f[] texCoord = new Vector2f[8];
int [] indexes = { 2,1,0, 1,2,3, 0,4,1, 4,5,1, 3,5,1, 3,7,5,
0,4,2, 2,4,6, 2,3,7, 2,7,6, 4,5,6, 5,7,6};public TileMesh(BigPoint start, BigPoint end, float width){
Vector3f base = new Vector3f(width/2f,0,0); Quaternion quat1 = new Quaternion(); Quaternion quat2 = new Quaternion(); float[] angles1 = new float[]{start.rot.x / 180 * FastMath.PI, start.rot.y / 180 * FastMath.PI,start.rot.z / 180 * FastMath.PI}; float[] angles2 = new float[]{end.rot.x / 180 * FastMath.PI, end.rot.y / 180 * FastMath.PI,end.rot.z / 180 * FastMath.PI}; quat1.fromAngles(angles1); quat2.fromAngles(angles2); Vector3f mod1 = quat1.mult(base); Vector3f mod2 = quat2.mult(base); vertices[0] = (start.pos).subtract(mod1); vertices[1] = (start.pos).add(mod1); vertices[2] = (end.pos).subtract(mod2); vertices[3] = (end.pos).add(mod2); vertices[4] = ((start.pos).subtract(mod1)).subtract(new Vector3f(0,1,0)); vertices[5] = ((start.pos).add(mod1)).subtract(new Vector3f(0,1,0)); vertices[6] = ((end.pos).subtract(mod2)).subtract(new Vector3f(0,1,0)); vertices[7] = ((end.pos).add(mod2)).subtract(new Vector3f(0,1,0)); texCoord[0] = new Vector2f(0,0); texCoord[1] = new Vector2f(1,0); texCoord[2] = new Vector2f(0,1); texCoord[3] = new Vector2f(1,1); texCoord[4] = new Vector2f(0,0); texCoord[5] = new Vector2f(1,0); texCoord[6] = new Vector2f(0,1); texCoord[7] = new Vector2f(1,1); this.setBuffer(Type.Position, 3, BufferUtils.createFloatBuffer(vertices)); this.setBuffer(Type.TexCoord, 2, BufferUtils.createFloatBuffer(texCoord)); this.setBuffer(Type.Index, 3, BufferUtils.createIntBuffer(indexes)); this.updateBound();}
}
[/java]
BigPoint.java:
[java]package mygame;
import com.jme3.math.Vector3f;
/**
*
-
@author brother.byto
*/
public class BigPoint {public Vector3f pos;
public Vector3f rot;public BigPoint(){
this.pos = new Vector3f();
this.rot = new Vector3f();
}public BigPoint(Vector3f pos, Vector3f rot){
this.pos = pos;
this.rot = rot;
}
}
[/java]