Java Mesh.getIndicesAsList方法代码示例

import com.jme3.scene.Mesh; //导入方法依赖的package包/类
public static void convertToList(Mesh mesh){
    IndexBuffer inBuf = mesh.getIndicesAsList();
    IndexBuffer outBuf = IndexBuffer.createIndexBuffer(mesh.getVertexCount(),
                                                       inBuf.size());

    for (int i = 0; i < inBuf.size(); i++){
        outBuf.put(i, inBuf.get(i));
    }

    mesh.clearBuffer(Type.Index);
    switch (mesh.getMode()){
        case LineLoop:
        case LineStrip:
            mesh.setMode(Mode.Lines);
            break;
        case TriangleStrip:
        case TriangleFan:
            mesh.setMode(Mode.Triangles);
            break;
        default:
            break;
    }
    if (outBuf instanceof IndexIntBuffer){
        mesh.setBuffer(Type.Index, 3, (IntBuffer)outBuf.getBuffer());
    }else{
        mesh.setBuffer(Type.Index, 3, (ShortBuffer)outBuf.getBuffer());
    }
}
 

import com.jme3.scene.Mesh; //导入方法依赖的package包/类
public static IndexedMesh convert(Mesh mesh) {
    IndexedMesh jBulletIndexedMesh = new IndexedMesh();
    jBulletIndexedMesh.triangleIndexBase = ByteBuffer.allocate(mesh.getTriangleCount() * 3 * 4);
    jBulletIndexedMesh.vertexBase = ByteBuffer.allocate(mesh.getVertexCount() * 3 * 4);

    IndexBuffer indices = mesh.getIndicesAsList();
    
    FloatBuffer vertices = mesh.getFloatBuffer(Type.Position);
    vertices.rewind();

    int verticesLength = mesh.getVertexCount() * 3;
    jBulletIndexedMesh.numVertices = mesh.getVertexCount();
    jBulletIndexedMesh.vertexStride = 12; //3 verts * 4 bytes per.
    for (int i = 0; i < verticesLength; i++) {
        float tempFloat = vertices.get();
        jBulletIndexedMesh.vertexBase.putFloat(tempFloat);
    }

    int indicesLength = mesh.getTriangleCount() * 3;
    jBulletIndexedMesh.numTriangles = mesh.getTriangleCount();
    jBulletIndexedMesh.triangleIndexStride = 12; //3 index entries * 4 bytes each.
    for (int i = 0; i < indicesLength; i++) {
        jBulletIndexedMesh.triangleIndexBase.putInt(indices.get(i));
    }
    vertices.rewind();
    vertices.clear();

    return jBulletIndexedMesh;
}
 

import com.jme3.scene.Mesh; //导入方法依赖的package包/类
public static ColorRGBA getColor( Geometry geom, Vector3f pt, int index, Tweed tweed ) {
		
		MatParam param = geom.getMaterial().getParam( "DiffuseMap" );
		
		ImageRaster ir = ImageRaster.create( tweed.getAssetManager().loadTexture( ((Texture2D)param.getValue()).getName() ).getImage() );
    	
		Mesh mesh = geom.getMesh();
//		geom.getMaterial().getMaterialDef().
		
        VertexBuffer pb = mesh.getBuffer(Type.Position);
        VertexBuffer tb = mesh.getBuffer( Type.TexCoord );
        
        IndexBuffer  ib = mesh.getIndicesAsList();
        
        Vector2f uva = new Vector2f(), uvb = new Vector2f(), uvc = new Vector2f();
        Vector3f la  = new Vector3f(), lb  = new Vector3f(), lc  = new Vector3f();
        
        if (pb != null && pb.getFormat() == Format.Float && pb.getNumComponents() == 3) {
        	
            FloatBuffer fpb = (FloatBuffer) pb.getData();
            FloatBuffer ftb = (FloatBuffer) tb.getData();

            // aquire triangle's vertex indices
            int vertIndex = index * 3;
            
            int va = ib.get(vertIndex);
            int vb = ib.get(vertIndex+1);
            int vc = ib.get(vertIndex+2);
            
            BufferUtils.populateFromBuffer( la, fpb, va );
            BufferUtils.populateFromBuffer( lb, fpb, vb );
            BufferUtils.populateFromBuffer( lc, fpb, vc );
            
            BufferUtils.populateFromBuffer( uva, ftb, va );
            BufferUtils.populateFromBuffer( uvb, ftb, vb );
            BufferUtils.populateFromBuffer( uvc, ftb, vc );
            
//            PaintThing.debug.put(1, new Line ( la.x, la.z, lb.x, lb.z) );
//            PaintThing.debug.put(2, new Line ( lb.x, lb.z, lc.x, lc.z) );
//            PaintThing.debug.put(3, new Line ( lc.x, lc.z, la.x, la.z) );
            
            float[] bary = barycentric( pt, la, lb, lc );
            
            int x = (int)( ( uva.x * bary[0] + uvb.x * bary[1] + uvc.x * bary[2] ) * ir.getWidth ()) ,
            	y = (int)( ( uva.y * bary[0] + uvb.y * bary[1] + uvc.y * bary[2] ) * ir.getHeight()) ;
            
            ColorRGBA out = ir.getPixel( x, y );//ir.getHeight() - y -1 );

//            for (Pair<Vector3f, Vector2f> pair : new Pair[]{ new Pair( la, uva), new Pair (lb, uvb), new Pair (lc, uvc)}) {
//            	
//            	int xx = (int)(pair.second().x * ir.getWidth () ),
//            	    yy = (int)(pair.second().y * ir.getHeight() );
//            	
//            	System.out.println("xx "+xx+" yy "+ yy );
//            	
//            	ColorRGBA o = ir.getPixel( 
//            			xx,
//            			yy );
//            	
//            	PaintThing.debug.put(1, new ColPt( pair.first().x, pair.first().z, o.r, o.g, o.b ));
//            }
            
//            System.out.println("<< "+ ((Texture2D)param.getValue()).getName());
//			System.out.println( x + " " + y + " :: " + bary[ 0 ] + " " + bary[ 1 ] + " " + bary[ 2 ] + 
//					" --> " + out.r + "," + out.g + "," + out.b );
            
            return out;
            
        }else{
        	
            throw new UnsupportedOperationException("Position buffer not set or has incompatible format");
        }
    }