touch_screen_notes.txt

CaptureScript
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int[] realWorldPoints = context.ProjectiveToWorld



exclude all points where y < rangeMin || y > rangeMax

export touchX,touchZ  --> touchX, touchY





Unity Scripts
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class SharedVertex
	float unityX, unityY, touchX, touchY




class TouchEventManager

      SharedVertex NW, SW, NE, SE   // TODO this could probably be encoded as a trapezoid
      float unityToTouchWidthRatio, unityToTouchHeightRatio


      setNW(unityX, unityY, touchX, touchY):
      setNE(unityX, unityY, touchX, touchY):
      setSW(unityX, unityY, touchX, touchY):
      setSE(unityX, unityY, touchX, touchY):

      
      calibrateWithCurrentSharedVertices:
      
            unityWidthDelta = NW.unityX - NE.unityX            touchWidthDelta = NW.touchX - NE.touchX
	    touchHeightDelta = NW.touchY - SW.touchY

	    unityToTouchWidthRatio = unityWidthDelta / touchWidthDelta
      	    unityToTouchHeightRatio = unityHeightDelta / touchHeightDelta


Callbacks (via OSC):	    
touchDown(touchX, touchY)

touchMoved(touchX, touchY)

touchEnd(touchX, touchY)