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The inertia matrix and element center of mass


GaenTrueblade

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I started building a new dynamic construct, paying close attention to the inertia matrix. I placed the core at 0,0,0 and the inertia matrix was perfectly diagonal at this point. I placed some voxels against the core, in order to get a squared surface for other placements. Then I tried placing a databank at x=z=0 and I saw nonzero values in the off-diagonal yz element. As I move the databank along the y axis that value changed. This would indicate that the center of mass of the databank is not at its location in the grid of the construct. So the center of mass of the databank is lower than the center of the box that contains its shape (the yz element is positive). 

 

This seems to be either a bug, or a level of detail that we don't need. I don't see this issue with the hovercraft seat. I will look carefully at other elements as I build this construct.

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