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problem with shape position - Gideros Forum

problem with shape position

hgvyas123hgvyas123 Guru
edited March 2012 in General questions
guys see the below code what i am doing wrong or why it is not going to 0,0 position
function drawRect(left,top,width,height)
	local shape = Shape.new()
	shape:setFillStyle(Shape.SOLID, 0xffffff, 0.5)
	shape:beginPath()
	shape:moveTo(left,top)
	shape:lineTo(left + width, top)
	shape:lineTo(left + width, top+height)
	shape:lineTo(left, top+height)
 
	shape:closePath()
	shape:endPath()
	return shape
end
 
 
local myRect = drawRect(100,0,50,80)
myRect:setColorTransform(0,0,0,1)
stage:addChild(myRect)
myRect:setPosition(0,0)       -- this is a issue need to move it to 0,0 point
same for circle shape also :(
 
function drawArc(xc,yc,xradius,yradius,startAngle,endAngle,isFill)
	if yradius == nil then
		yradius = xradius
	end
	if startAngle == nil then
		startAngle = 0
	end
	if endAngle == nil then
		endAngle = 360
	end
	if isFill == nil then
		isFill = true
	end
	local shape = Shape.new()
	if isFill then
		shape:setFillStyle(Shape.SOLID, 0xffffff, 0.5)
	else
		shape:setLineStyle(3, 0x000000)
	end
	shape:beginPath()
	for i=startAngle,endAngle do
		if i==1 then
			shape:moveTo(xc + math.sin(math.rad(i)) * xradius,yc + math.cos(math.rad(i)) * yradius)
		else
			shape:lineTo(xc + math.sin(math.rad(i)) * xradius,yc + math.cos(math.rad(i)) * yradius)
		end
	end
	if isFill then
		shape:closePath()
	end
	shape:endPath()
	return shape
end
 
 
local myCircle = drawArc(150,55,50)
myCircle:setPosition(0,0) --  same issue cant move it
myCircle:setColorTransform(0,1,0,1)
stage:addChild(myCircle)
thnx

Comments

  • also what is a tag for syntax highlighting

    thnx
  • ar2rsawseenar2rsawseen Maintainer
    <pre lang='lua'>
    </pre>

    Likes: jdbc

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  • ok updated with proper tag

  • atilimatilim Maintainer
    edited March 2012
    There's nothing wrong with your code. The origin of all sprites are at (0, 0) by default.

    Most probably you want to create your rectangle as:
    local myRect = drawRect(0,0,50,80) -- top left is at (0,0) and dimensions are (50,80)
    and position it by using:
    myRect:setPosition(100, 0)
  • hgvyas123hgvyas123 Guru
    edited March 2012
    ok got that

    :)




  • hgvyas123hgvyas123 Guru
    edited March 2012
    ok worked wonderfully and here's the updated code to draw rectangle,arc,circle and roundedrect may be some one like it :)
    function drawRect(left,top,width,height)
    	local shape = Shape.new()
    	shape:setFillStyle(Shape.SOLID, 0xffffff, 0.5)
    	shape:beginPath()
    	shape:moveTo(0,0)
    	shape:lineTo(width, 0)
    	shape:lineTo(width, height)
    	shape:lineTo(0, height)
     
    	shape:closePath()
    	shape:endPath()
    	shape:setPosition(left,top)
    	return shape
    end
     
    local myRect = drawRect(10,0,50,80)
    myRect:setColorTransform(0,0,0,1)
    stage:addChild(myRect)
    myRect:setPosition(0,250)
     
    function drawArc(xc,yc,xradius,yradius,startAngle,endAngle,isFill)
    	if yradius == nil then
    		yradius = xradius
    	end
    	if startAngle == nil then
    		startAngle = 0
    	end
    	if endAngle == nil then
    		endAngle = 360
    	end
    	if isFill == nil then
    		isFill = true
    	end
    	local shape = Shape.new()
    	if isFill then
    		shape:setFillStyle(Shape.SOLID, 0xffffff, 0.5)
    	else
    		shape:setLineStyle(3, 0x000000)
    	end
    	shape:beginPath()
    	for i=startAngle,endAngle do
    		if i==1 then
    			shape:moveTo(math.sin(math.rad(i)) * xradius, math.cos(math.rad(i)) * yradius)
    		else
    			shape:lineTo(math.sin(math.rad(i)) * xradius, math.cos(math.rad(i)) * yradius)
    		end
    	end
    	if isFill then
    		shape:closePath()
    	end
    	shape:endPath()
    	shape:setPosition(xc,yc)
    	return shape
    end
     
    --usage
    local myArc = drawArc(250,110,50,100,40,220,false)
    myArc:setColorTransform(0,1,0,1)
    stage:addChild(myArc)
     
    local myCircle = drawArc(150,55,50)
    myCircle:setPosition(50,50)
    myCircle:setColorTransform(0,1,0,1)
    stage:addChild(myCircle)
     
    function drawRoundedRect(left,top,width,height,radius)
    	--radius = 10
    	local yc = top + height*0.5
    	local xc = left + width*0.5
    	local shape = Shape.new()
    	shape:setFillStyle(Shape.SOLID, 0xffffff, 1.5)
     
    	local xPointArr = {}
    	local yPointArr = {}
    	local function getPoints(xc,yc,radius,startAngle,endAngle)
    		for i=startAngle,endAngle do
    			xPointArr[#xPointArr + 1],yPointArr[#yPointArr + 1] = xc + math.sin(math.rad(i)) * radius,yc + math.cos(math.rad(i)) * radius
    		end
    	end
     
    	getPoints(width-radius*0.5,height-radius*0.5,radius,0,90)
    	getPoints(width-radius*0.5,radius*0.5,radius,90,180)
    	getPoints(radius*0.5,radius*0.5,radius,180,270)
    	getPoints(radius*0.5,height-radius*0.5,radius,270,360)
     
    	for i=1,#xPointArr do
    		if i == 1 then
    			shape:moveTo(xPointArr[i],yPointArr[i])
    		else
    			shape:lineTo(xPointArr[i],yPointArr[i])
    		end
    	end
     
    	shape:closePath()
    	shape:endPath()
     
    	shape:setScale(width/shape:getWidth(),height/shape:getHeight())
    	shape:setPosition(left,top)
     
    	return shape
     
    end
     
    local myRoundedRect = drawRoundedRect(150, 200, 80, 160,10)
    myRoundedRect:setColorTransform(1,1,0,1)
     
    stage:addChild(myRoundedRect)

    Likes: atilim, ndoss

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