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In this Discussion
Condition to see what scaled Images/Sprites are being used when Auto-Scaled
Daimyo21
Member
So I understand Auto-Scale fairly well and have tested it with different resolution images and have seen it work.
My Question regarding auto-scale:
I am using physics editor to map out vectors for image/sprite assets and when these images/sprites are auto-scaled I need to be able to do a check to see which ones are being used(the 1x or the 2x etc.).
So example (this is just logic, not actual code):
if (using 1x auto-scaled images) then
local scaleFactor = 1.0
local physics = (loadfile "PhysicsData_for_1x.lua")().physicsData(scaleFactor)
else if (using 2x auto-scaled images) then
local scaleFactor = 1.0
local physics = (loadfile "PhysicsData_for_2x.lua")().physicsData(scaleFactor)
end
Is there a simple condition check to see what scale is currently being used?
Thanks!
My Question regarding auto-scale:
I am using physics editor to map out vectors for image/sprite assets and when these images/sprites are auto-scaled I need to be able to do a check to see which ones are being used(the 1x or the 2x etc.).
So example (this is just logic, not actual code):
if (using 1x auto-scaled images) then
local scaleFactor = 1.0
local physics = (loadfile "PhysicsData_for_1x.lua")().physicsData(scaleFactor)
else if (using 2x auto-scaled images) then
local scaleFactor = 1.0
local physics = (loadfile "PhysicsData_for_2x.lua")().physicsData(scaleFactor)
end
Is there a simple condition check to see what scale is currently being used?
Thanks!
Comments
But, if you are using Box2d, then
Physics are just numbers, simply a model. You don't need to scale physics to match object size, because relatively they all will be the same and nothing will change
So if I am using auto-scale and it selects say 2x at a higher resolution, the Physics Data that I created for 1.5x resolution will make the coordinates all off. So really I need to be able to detect which it is using, 0.5x 1.0x 1.5x, 2x, etc. and then based on what it is using I change the scaleFactor for the physicsData.lua file.
I can post a screenshot example if that helps if I am not being clear enough.
If i am not mistaken, i used only one definition of physics data, which is only for 1x asset. Then when the image is replaced with 2x, physics data will adjust accordingly, because i think physics use virtual resolution. No need to create many physics data for each resolution
Oh and i use letterbox auto-scale mode
http://www.nightspade.com
But if you still need it then:
Let's say my base resolution is 320x480 (iPhone) and it runs on a device with 480x854. Thats a scaling factor of 1.5 in x-direction and 1.779 in y-direction. Lets say I have x1.4 and x1.8 graphics sets.
Currently the formula is calculating average scaling by
So you should store a table in all your supported resolutions and find the closest one to current scale ratio between logical dimensions and device dimensions (which you can get from application:getDeviceWidth/Height)
Only note that device dimensions are always returned as if your phone is in portrait
UPDATE:
I can confirm that Nascode is right, it does scale properly when it switches from 1x to 2x etc..
@ar2rawseen Thanks for the breakdown as I figured that may be one solution but I just didnt understand how auto-scaled calculated it so this helps tremendously.
Likes: Nascode