Hello all,
I'm having a little trouble wrapping my head around getting AutoTransform and Draggers to play together so I thought I'd turn to the trusty mailing list. What I'm trying to do: 1) Populate a scene with many things. One of which is an object - let's assume it's a sphere for simplicity. 2) I want the sphere to translate according to world coordinates but as far as scaling I want it to stay in model/screen coordinates. In other words the sphere moves around but never changes size. 3) I want to be able to move the sphere around with the mouse in a 2D plane. What I've done: I'm close to a solution. I can use the AutoTransform to accomplish (2) by setting setAutoScaleToScreen(true) and that works fine by itself (w/o using a dragger). I can use a dragger (TranslatePlaneDragger) to accomplish (3) and that works fine by itself (w/o using autotransform) but the problem is that the sphere scales with the world/scene which I don't want. Now for trying to combine them: I've thought of at least 3 options (actually more) for what the scene graph should look like which follow. Option 1: [Root] [Transform node (local to world)] [AutoTransform node] [Group node] [Selection node] [Dragger node] And under [Selection node]: [mySphereGeode node] And under [Dragger node]: [_translate2DDragger (which is the default TranslatePlaneDragger geom geode) node] Option 2: [Root] [Transform node (local to world)] [Group node] [Selection node] [Dragger node] And under [Selection node]: [AutoTransform node] [mySphereGeode node] And under [Dragger node]: [_translate2DDragger (which is the default TranslatePlaneDragger geom geode) node] Option 3: [Root] [Transform node (local to world)] [Group node] [Selection node] [Dragger node] And under [Selection node]: [AutoTransform1 node] [mySphereGeode node] And under [Dragger node]: [AutoTransform2 node] [_translate2DDragger (which is the default TranslatePlaneDragger geom geode) node] Conceptually Options 1 and 2 don't seem right to me. I've tried them anyway-option 1 seems like it works until you move the camera and things go screwy. I think it's because the translations as a result of the dragger are magnified/scaled by the autotransform node above it. Option 2 works but leaves the dragger polygon in world coordinates which isn't what I want. Option 3 seems like the right choice to me but I can't get it to work correctly. The dragger polygon doesn't show up... Anyone have any insight?? I can provide more info for clarification and/or code snippets if anyone needs. Thanks -Brad
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