Dificuldades ao usar ArrayList para adicionar multiplos objectos LineArray ao Grafo de Cenas com ActionEvent em Tempo de Execução

Hello all Dev in the community, I'm new to Java and I recently started exploring and learning the Java3D API and I'm having a lot of difficulties in the process of developing a simple project. My idea is to add multiple LineArray objects to each mouse click at Runtime.

This is a piece of code where I can simply render a single line.



 public static java.util.ArrayList < javax.media.j3d.Shape3D > modelos_3d = new java.util.ArrayList < javax.media.j3d.Shape3D >();
       
        public static java.util.ArrayList < javax.media.j3d.TransformGroup > transform_grp = new java.util.ArrayList < javax.media.j3d.TransformGroup >();
       
        public static javax.media.j3d.Shape3D forma3D = new javax.media.j3d.Shape3D();

        public static javax.media.j3d.TransformGroup transform_group = new javax.media.j3d.TransformGroup();
       
       
       
        public static void line_array()
        {
       
            javax.media.j3d.BranchGroup branch_grupo = new javax.media.j3d.BranchGroup();//OBS: O grafo de cenas

           
            LineArray line_array = new LineArray(2, LineArray.COORDINATES|LineArray.COLOR_3);
           
           
           
            line_array.setCoordinate(0, new javax.vecmath.Point3f(-0.8f,0.8f,0f));
       
            line_array.setColor(0,new javax.vecmath.Color3f(Color.RED));
           
           
            graphics_engine.line_array.add(line_array);
           
           
            for(int i = 0; i < graphics_engine.line_array.size(); i++)
            {
               
                 
                    graphics_engine.forma3D.setCapability(graphics_engine.forma3D.ALLOW_GEOMETRY_WRITE);

                    graphics_engine.modelos_3d.add(graphics_engine.forma3D);
                    //graphics_engine.forma3D.setGeometry(line_array);
                    graphics_engine.forma3D.setGeometry(graphics_engine.line_array.get(i));


                    graphics_engine.transform_group.setCapability(graphics_engine.transform_group.ALLOW_TRANSFORM_WRITE);


                    graphics_engine.transform_group.addChild(graphics_engine.modelos_3d.get(i));


                    branch_grupo.addChild(graphics_engine.transform_group);

                    gui_components.objecto_branch_grupo.addChild(branch_grupo);

               
            }
           
        }









But when I turn the javax.media.j3d.Shape3D object into a vector, nothing is rendered on the screen. This is code that I'm using after making this change.


public static java.util.ArrayList < javax.media.j3d.Shape3D > modelos_3d = new java.util.ArrayList < javax.media.j3d.Shape3D >();
       
        public static java.util.ArrayList < javax.media.j3d.TransformGroup > transform_grp = new java.util.ArrayList < javax.media.j3d.TransformGroup >();
       
        public static javax.media.j3d.Shape3D forma3D[]; //= new javax.media.j3d.Shape3D();

        public static javax.media.j3d.TransformGroup transform_group = new javax.media.j3d.TransformGroup();
       
       
       
        public static void line_array()
        {
       
            javax.media.j3d.BranchGroup branch_grupo = new javax.media.j3d.BranchGroup();//OBS: O grafo de cenas

           
            LineArray line_array = new LineArray(2, LineArray.COORDINATES|LineArray.COLOR_3);
           
           
           
            line_array.setCoordinate(0, new javax.vecmath.Point3f(-0.8f,0.8f,0f));
       
            line_array.setColor(0,new javax.vecmath.Color3f(Color.RED));
           
           
            graphics_engine.line_array.add(line_array);
           
           
            for(int i = 0; i < graphics_engine.line_array.size(); i++)
            {
               
                 
                    graphics_engine.forma3D[i].setCapability(graphics_engine.forma3D[i].ALLOW_GEOMETRY_WRITE);

                    graphics_engine.modelos_3d.add(graphics_engine.forma3D[i]);
                    //graphics_engine.forma3D.setGeometry(line_array);
                    graphics_engine.forma3D[i].setGeometry(graphics_engine.line_array.get(i));


                    graphics_engine.transform_group.setCapability(graphics_engine.transform_group.ALLOW_TRANSFORM_WRITE);


                    graphics_engine.transform_group.addChild(graphics_engine.modelos_3d.get(i));


                    branch_grupo.addChild(graphics_engine.transform_group);

                    gui_components.objecto_branch_grupo.addChild(branch_grupo);

               
            }
           
        }



I would like to know and learn how I could do this or what I am doing wrong in this algorithm, all help, teachings and criticism is always welcome.

Thank you in advance for everyone's help. Thank you very much

Hello

Please post the stack trace as plain text instead of an unreadable and very blurry screen capture. Either you use the wrong capabilities or you call setCapability too late. Please post a SSCCE, make an effort, use imports, use only English to name your variables and in your comments. Indicate your Java version and your Java3D version.