Put sense into this.

// I read a 3DS file that contains 2 object3ds.
Object3D[] obj = Loader.read(...)

// I have translation and rotation offsets for both object3ds.
obj[0].translate(translation_offset1);
obj[1].translate(translation_offset2);
obj[0].translateMesh();
obj[1].translateMesh();

obj[0].rotateX(rotation_offset1);
obj[1].rotateX(rotation_offset2);
obj[0].rotateMesh();
obj[1].rotateMesh();

Object3D o3d = o3ds[0];
            for (Object3D o: o3ds)
                if (o!=o3d)
                    o3d = Object3D.mergeObjects(o3d, o);

o3d is added to the world etc.

Why is mesh translation/rotation necessary when merging objects?
Without rotation the translation part works, but then I rotate and the obj moves!? Why does it move on rotation?

Hello!

I need to paint on the canvas after it has been painted in lwjgl (when the canvas has been displayed and repainted from jpct). Does anyone have any ideas?

 - Lwjgl suggests that one overrides the paint/paintGL method, but since the JPCT render gives the canvas this approach is not possible.

Thanks in advance.

Hi.

By using the software render, how is it possible to add swing components on the same pane you're drawing the world on. The swing components should be on top of the rendered scene. Is there a right way to do this?

Regards.

Hello.

How do I access the transformed vertex information? I understand a IVertexController implementation operates in object space, but could it somehow work in the world? The PolygonManager delivers the transformed vertex, but it assumes that one is operating on polygons. I wouldn't expect the PolygonManager is the obviously choise for this kind of job - the current approach would then give 3x CPU overhead (for triangles).

By custom selection the transformed mesh should be directly accessible, but I can't figure out how...

Thanks in advance!

Hello.

Using Object3D.scale(float) to scale the object causing a tranformation to the object in world space. I though this method was related to object space? Why isn't a matrix needed to scale (transform) the object?

My other approach did have same result:
SimpleVector origin = o3d.getOrigin();
o3d.setScale(0.95f);
o3d.setTranslationMatrix(new Matrix());
o3d.translate(origin);

Truely something I've got wrong here. Please help.

Hello guys.

I want to assign text to objects. Putting the text at the objects transformed center is the goal. In my solution I have one "origin object" which has several childs attached to it, and the camera towards it.

Now, placing the text should be something like this (just after the framebuffer has been flushed):

SimpleVector origin = Interact2D.project3D2D(camera, buffer, originObject.getCenter());
int length = gFrame.getFontMetrics().stringWidth(originObject.getName());
length /= 2;
gFrame.drawString(originObject.getName(), (int)origin.x-length, (int)origin.y);
... but it's not. The origin object's name appear at coordinate (frame_width; frame_height), leaving 1/4 of the text visible at the buttom to the right. First question is why it that?

Rewriting last line to this:

gFrame.drawString(originObject.getName(), (int)origin.x-length-(getWidth()/2), (int)origin.y-(getHeight()/2));
...solves the wrong position. The text appears right in the center of the object.

Now for the child objects:

for (Object3D o3d: childObjects) {
    SimpleVector v = o3d.getTransformedCenter();
    v = Interact2D.project3D2D(camera, buffer, v);

    length = gFrame.getFontMetrics().stringWidth(o3d.getName());
    length /= 2;
    gFrame.drawString(o3d.getName(), (int)v.x-length-(getWidth()/2), (int)v.y-(getHeight()/2));
    // Still should be: gFrame.drawString(o3d.getName(), (int)v.x-length, (int)v.y);
}
The transformation is correct, but the positioning have some kind of offset, like the distance from object's transformed center and it's assigned text is like the distance from origin and transformed object * 2.



What am I doing wrong?