Image skew in projectors

 

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This behavior allows you to have 4 "handle" sprites that the end user can use to skew images in a projector or shockwave file

--Copyright 1999 Chuck Neal --chuck@mediamacros.com --If you find this code helpful, send me an e-mail and let me know.  :-) property whichItem, spriteNum, whichPoint, quadList global activeSprite on getPropertyDescriptionList me   p_list = [:]   p_list.addProp(#whichItem, [#format : #symbol, #comment : "Control point or object?", #default : #point, #range : [#point, #object, #background]])   return p_list end on editQuad me   if whichItem = #point then     sprite(spriteNum).loc = sprite(activeSprite).quad[whichPoint]        end if end on hidePoints me   if whichItem = #point then     sprite(spriteNum).loc = point(-1000, -1000)   end if end on mouseDown me   if whichItem = #point then     repeat while the stillDown       sprite(spriteNum).loc = the mouseLoc       sendSprite(activeSprite, #rescaleQuad, whichPoint, sprite(spriteNum).loc)     end repeat   end if end on beginSprite me   if whichItem = #point then     whichPoint = (spriteNum mod 4) + 1     sprite(spriteNum).loc = point(-1000,-1000)   else     quadList = sprite(spriteNum).quad   end if end on rescaleQuad me, whatHandle, whatPoint   quadList.setAt(whatHandle, whatPoint)   sprite(spriteNum).quad = quadList   updateStage end on mouseUp me   if whichItem = #object then     activeSprite = spriteNum     sendAllSprites(#editQuad)   else if whichItem = #background then     sendAllSprites(#hidePoints)   end if end on getBehaviorDescription me   return "For this behavior you will need 4 small " & quote & "handle" & quote & " sprites and at least one image, text, or shape sprite.  Drop the behavior on the points, the object and on a background sprite.  When you click an object the handles will jump into place and draging them will skew and scale the image.  Click the background the hide the handles off screen." end