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cs185cLeapMotionTeam / leapmotion_boardgame

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Pieces fall through board [non-urgent] #6

Closed seanvail closed 8 years ago

seanvail commented 8 years ago

If the player hand moves the piece through the board mesh and releases, the piece falls through the board and to the floor.

deanljohnson commented 8 years ago

The reason they fall right now is because I only interpolated the x/y location, letting the the physics engine control the Z-direction (gravity). We could interpolate the z location as well, but there is an issue with that. The pieces interpolate to the center of the square, but a pieces origin is the center of it's mesh. So, if we interpolated on the z-axis, the piece would come to rest with it's center at the center of the square, rather than it's bottom-center at the center of the square.

The way I was thinking about solving this is to have the code that centers the piece on a square check if the piece is currently below it's target. If so, it will move the piece towards that position. We would likely have to move to a location above the board for this to work.

Alternatively, interpolate on the z-axis, but target a position that is ((.5 * PieceHeight) + (.5 * SquareHeight)), above the square.

deanljohnson commented 8 years ago

Went with the simple solution - if a piece is ever below the board (and not grabbed) it is just teleported above the board.