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    Image Scaling

    CyberienceCyberience Member
    edited January 2013 in General questions
    Am I missing something, or is it, I must have am image fixed at each resolution ?I need. what I mean is, not scaling functions, so if I have a 32x32, I cant stretch or shrink it as I need?
    In HTML5 I have an image place function that has parameter to indicate the width and hieght of the slected image, so once represents the crop, the other represents the placement.

    I am using local hazard = Bitmap.new(Texture.new(p_image)) to select the image
    and the usual properties for position and angle etc,
    plus I cant seem to find a list of these built in properties so I can look up the options.
    Any ideas or guidance extremely welcome.

    Likes: WauloK

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    Comments

    • SinisterSoftSinisterSoft Maintainer
      Accepted Answer
      :setScale(0 - 1.0)

      Likes: Cyberience

      Coder, video game industry veteran (since the '80s, ❤'s assembler), arrested - never convicted hacker (in the '90s), dad of five, he/him (if that even matters!).
      https://deluxepixel.com
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    • ar2rsawseenar2rsawseen Maintainer
      @Cyberience there is a reference manual with all the methods from all objects
      Here online: http://www.giderosmobile.com/documentation/reference_manual.html

      Or locally on your computer, open Gideros Studio, click About -> API Documentation

      There are properties used in API, usually only methods.

      Likes: Cyberience

      http://appcodingeasy.com/Gideros-Mobile
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    • CyberienceCyberience Member
      edited March 2013
      What I am trying to do is take Images of variable sizes, and thumb nail them.
      A game feature, when I click on a game object, to show its active I expand it breifly and shrink it back, this is a good Visual trick to make the experience nicer, though I am still struggling with the Matrix thing and how to expan and shrink images within the Gideros tool set.
      I think Matrix is where it is, and I can use scaling for the minor effects, but the problem I am having is the variable images, whether it is 300x300 or 20x20 I want to place it into a 50x50 box.

      Any suggestions?
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    • ar2rsawseenar2rsawseen Maintainer
      edited March 2013 Accepted Answer
      @Cyberience a bit of the math will do the magic trick ;)
      function Sprite:setWidth(newWidth)
	-- Set a sprite's width using the scale property
	local x,y,width,height=self:getBounds(self)
	local newScale=newWidth/width
	self:setScaleX(newScale)
end
 
function Sprite:setHeight(newHeight)
	-- Set a sprite's height using the scale property
	local x,y,width,height=self:getBounds(self)
	local newScale=newHeight/height
	self:setScaleY(newScale)
end
 
--then use it as
someimage:setWidth(50)

      Likes: Cyberience

      http://appcodingeasy.com/Gideros-Mobile
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