I also added a resizeQuality to the "on touchMove" handler: set the resizeQuality of image "square" to "best"
-- Tom McGrath III http://lazyriver.on-rev.com 3mcgr...@comcast.net On Jan 22, 2012, at 1:57 PM, Thomas McGrath III wrote: > > I was playing around with the "Pinch to Zoom an object" lesson at: > http://lessons.runrev.com/s/lessons/m/4069/l/11509-how-do-i-implement-a-multi-touch-pinch-motion > > And I wanted to add rotate to it as well so that I could pinch and rotate at > the same time. I ran into a big wall (called Math I think) in trying to > rotate based on how far from the original start point and wether I was > rotating left or right. > > My solution works for the most part but it is not optimal or very clean and > wanted to invite others to take a stab at it: > > I stated with the Pinch lesson stack and changed the GRAPHIC to an IMAGE and > then modified the script to come up with this solution. This script goes into > the card script and the card has an image named "square" on it. I edited it > and added the rotateimage handler; > > local sTouchArray, sFRAMEWIDTH, sFRAMEHEIGHT > > on touchStart pId, pX, pY > put the width of image "square" into sFRAMEWIDTH > put the height of image "square" into sFRAMEHEIGHT > end touchStart > > on touchEnd pId > delete variable sTouchArray[pId] > end touchEnd > > on touchMove pId, pX, pY set the resizeQuality of image "square" to "best" > if sTouchArray[pId]["startloc"] is empty then > put (pX & comma & pY) into sTouchArray[pId]["startloc"] > end if > > put (pX & comma & pY) into sTouchArray[pId]["currentloc"] > > if the number of lines of the keys of sTouchArray is 2 then > # First lets get the data out of the array > put line 1 of the keys of sTouchArray into tPointOne > put line 2 of the keys of sTouchArray into tPointTwo > > # First lets calculate the size of the picture base on the distance > # between the two touch points > put sTouchArray[tPointOne]["startloc"] into tStartLoc1 > put sTouchArray[tPointTwo]["startloc"] into tStartLoc2 > put sTouchArray[tPointOne]["currentLoc"] into tCurrentLoc1 > if tStartLoc1 is not empty and tStartLoc2 is not empty then > put resizeDistance(tStartLoc1, tStartLoc2) into tStartDistance > put resizeDistance(sTouchArray[tPointOne]["currentloc"], > sTouchArray[tPointTwo]["currentloc"]) into tCurrentDistance > resizeimage tStartDistance, tCurrentDistance > if item 2 of tStartLoc1 < item 2 of tCurrentLoc1 then > rotateimage "left", item 2 of tStartLoc1, item 2 of > tCurrentLoc1 > else > rotateimage "right", item 2 of tStartLoc1, item 2 of > tCurrentLoc1 > end if > end if > end if > end touchMove > > function resizeDistance pLoc1, pLoc2 > local dy, dx, tDistance > put item 2 of pLoc1 - item 2 of pLoc2 into dy > put item 1 of pLoc1 - item 1 of pLoc2 into dx > put sqrt((dy*dy) + (dx*dx)) into tDistance > return tDistance > end resizeDistance > > on rotateimage pAngle pStart pNew > if pAngle contains "left" then > put pStart - pNew into tDistance > set the angle of image "square" to tDistance > else > put pNew - pStart into tDistance > set the angle of image "square" to (- tDistance) > end if > unlock screen > end rotateimage > > on resizeimage pStartDistance, pNewDistance > # Work out the percentage change between the old and new image > put round((pNewDistance / pStartDistance) * 100) into tPercentage > > # Store the original location of the image > put the loc of image "square" into tLoc > > # Calculate the new width and height > set the width of image "square" to round(sFRAMEWIDTH * (tPercentage / > 100)) > set the height of image "square" to round(sFRAMEHEIGHT * (tPercentage / > 100)) > > set the loc of image "square" to tLoc > unlock screen > end resize image > > > -- Tom McGrath III > http://lazyriver.on-rev.com > 3mcgr...@comcast.net > > > _______________________________________________ > use-livecode mailing list > use-livecode@lists.runrev.com > Please visit this url to subscribe, unsubscribe and manage your subscription > preferences: > http://lists.runrev.com/mailman/listinfo/use-livecode _______________________________________________ use-livecode mailing list use-livecode@lists.runrev.com Please visit this url to subscribe, unsubscribe and manage your subscription preferences: http://lists.runrev.com/mailman/listinfo/use-livecode
