Posted by tamb20 on Oct 21, 2015; 4:04am
URL: https://forum.jogamp.org/Issue-with-shading-the-cubic-tp4035539.html

Hi
Is there any class to shade 3D object.

The method I used is
        public BranchGroup shading() {
                BranchGroup shadeGroup = new BranchGroup();
                shadeGroup.setCapability(BranchGroup.ALLOW_DETACH);
                TransformGroup transGroup = new TransformGroup();
                transGroup.setCapability(TransformGroup.ALLOW_TRANSFORM_READ);
                transGroup.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
                shadeGroup.addChild(transGroup);

                BoundingSphere bounds = new BoundingSphere(new Point3d(0, 0, 0), 100);

                Color3f white = new Color3f(0.15f, 0.15f, 0.15f);

                // Set up the ambient light
                AmbientLight ambientLightNode = new AmbientLight(white);
                ambientLightNode.setInfluencingBounds(bounds);
                shadeGroup.addChild(ambientLightNode);

                // Set up the directional lights

                Vector3f light1Direction = new Vector3f(-1.0f, -1.0f, -1.0f);
                Vector3f light2Direction = new Vector3f(1.0f, -1.0f, -1.0f);
                Vector3f light3Direction = new Vector3f(1.0f, 1.0f, 1.0f);
                Vector3f light4Direction = new Vector3f(-1.0f, 1.0f, 1.0f);

                Color3f light1color = new Color3f(0.5f, 0.5f, 0.5f);
                Color3f light2color = new Color3f(0.3f, 0.3f, 0.3f);
                Color3f light3color = new Color3f(0.3f, 0.3f, 0.3f);
                Color3f light4color = new Color3f(0.3f, 0.3f, 0.3f);

                DirectionalLight light1 = new DirectionalLight(light1color,
                                light1Direction);
                light1.setInfluencingBounds(bounds);
                shadeGroup.addChild(light1);

                DirectionalLight light2 = new DirectionalLight(light2color,
                                light2Direction);
                light2.setInfluencingBounds(bounds);
                shadeGroup.addChild(light2);

                DirectionalLight light3 = new DirectionalLight(light3color,
                                light3Direction);
                light3.setInfluencingBounds(bounds);
                shadeGroup.addChild(light3);

                DirectionalLight light4 = new DirectionalLight(light4color,
                                light4Direction);
                light4.setInfluencingBounds(bounds);
                shadeGroup.addChild(light4);

                System.out.println("\r\n-----Shading-----");

                for (STL_TriInfo triInfo : triangleMap.getMap().values()) {
                        LinkedList<Integer> tri_ptids = triInfo.getPointIds();
                        double[][] points = new double[4][3];
                        double[][] normals = new double[4][3];
                        for (int i = 0; i < tri_ptids.size(); i++) {
                                Integer pt_ids = (Integer) tri_ptids.get(i);
                                normals[i] = pointMap.pt_normal(triangleMap, pt_ids);
                                MathTools.normalize(normals[i]);
                                STL_PointInfo ptinf = pointMap.getPointInfo(pt_ids);
                                points[i] = ptinf.getCurPos();
                        }
                        VSTriangle vstri = new VSTriangle(points, normals);
                        vstri.setCapability(Node.ENABLE_PICK_REPORTING);
                        PickTool.setCapabilities(vstri, PickTool.INTERSECT_FULL);
                        transGroup.addChild(vstri);
                }

                shadeGroup.compile();
                return shadeGroup;
        }

After I shade it it appears there are some issue with it and not shade properly. How I can solve it?