Initial position and rotation

Started by alakat, June 08, 2008, 05:15:42 PM

Previous topic - Next topic

alakat

Hello ever body.
i found a littel problem, this problem  occur when load model .obj or .3ds, the position and rotation is different but thy are exporting of same model, with blender.
i used this code

World worldx = new World();
        ModelFactory modelFactory = ModelFactory.getInstance();
        BaseEntity[] fields = new BaseEntity[4];
        Object3D[] cruz = null;
        if (SHOW_ORIGIN){

          /*  cruz = Loader.loadOBJ("/home/miguel/perfectday_project/TestProfectDay3D/models/xCoord.obj", "/home/miguel/perfectday_project""   /TestProfectDay3D/models/xCoord.mtl", 1.0f);*/
//              cruz = Loader.load3DS("/home/miguel/perfectday_project/TestProfectDay3D/models/xCoord.3ds", 1.0f);
            for (int i = 0; i < cruz.length; i++) {
                worldx.addObject(cruz[i]);
               
            }
        }
        worldx.buildAllObjects();
        /**
         * Place the camera at the starting position.
         */
        Camera camera = worldx.getCamera();
        camera.setPosition(this.xCamara,this.yCamara , this.zCamara);
       
        camera.lookAt(SimpleVector.ORIGIN);
         Config.fadeoutLight = false;
        worldx.getLights().setOverbrightLighting(Lights.OVERBRIGHT_LIGHTING_DISABLED);
        worldx.getLights().setRGBScale(Lights.RGB_SCALE_2X);
        worldx.setAmbientLight(25, 30, 30);

        /**
        * Place the lightsources...
        */
        worldx.addLight(new SimpleVector(0, -150, 0), 25, 22, 19);
        worldx.addLight(new SimpleVector(-1000, -150, 1000), 22, 5, 4);
        worldx.addLight(new SimpleVector(1000, -150, -1000), 4, 2, 22);
   
        return worldx;


is it normal?, if this is normal. which postion and rotation are initial with .3ds and .obj?.
Thank very much
Sorry for my english

EgonOlsen

The initial rotation is always the identity matrix, i.e. no rotation. The same applies to the translation: There is none. Maybe the exporter does some transformations, but the loader doesn't. i only loads what is in the file. What that is, is up to the exporter.

alakat

Yes, i thought that when o i load a model, this model dont have any translation and rotation, but in other post i paste code to i use to load,in this code i dont do any transation or rotation.
I use blender to export my model, i dont kwon why send you my model. This model is a three cylender (red cylinder paralel to X, green cylinder paralel to Y and blue cylinder paralel to Z) all there are perpendicular.
if i export model with obj, i show:

                        |Red
                        |
                        |
Green____
                       /
                      /Blue


if i export model with .3ds i show
                       |Red
                       |

                      | /Green
                      |/_______Blue

is very extrange.
Thanl very much with all help, in this extrange post
                       


EgonOlsen

Could be that these formats use different coordinate systems. However, if you don't like the orientation of one of them, change it after loading. The obj-version can simply be translated in the 3ds one by a simple rotation around then Y-axis.