How to rotate a frame?

lilgulps · 11-10-10, 04:34 PM

Code:

local addon = CreateFrame("Frame", "Base2", UIParent)
addon:SetHeight(128)
addon:SetWidth(128)
addon:SetUserPlaced(true)
addon:SetPoint("Center", 100, 0)

local tex = addon:CreateTexture(nil, "ARTWORK")
tex:SetTexture(file)
tex:SetAllPoints(addon)

Is what I have right now creating a frame filled with a picture

What I want to do is rotate the picture to a certain angle
What can I do to accomplish this?

I thinkg SetDegrees() only works with animations?

Kjado · 11-10-10, 04:46 PM

You will need to use SetTexCoord() and linear transformations to rotate a texture. This wowpedia link has some mathematical background associated with it, but if you are only interested in grabbing some code to rotate you can probably skip towards the bottom.

lilgulps · 11-10-10, 05:05 PM

Code:

local angle = math.rad(90)
local cos, sin = math.cos(angle), math.sin(angle)
tex:SetTexCoord((sin - cos), -(cos + sin), -cos, -sin, sin, -cos, 0, 0)

Added this code in, except now my texture doesn't show up in game. Am I missing something?

Xubera · 11-10-10, 05:17 PM

myTexture:SetRotation(math.rad(90))

lilgulps · 11-10-10, 05:26 PM

Code:

local addon = CreateFrame("Frame", "Base2", UIParent)
addon:SetHeight(128)
addon:SetWidth(128)
addon:SetUserPlaced(true)
addon:SetPoint("Center", 100, 0)

local tex = addon:CreateTexture(nil, "ARTWORK")
tex:SetTexture(file)
tex:SetAllPoints(addon)
tex:SetRotation(math.rad(90))

Rotated it 90 degrees but skews the image slightly, any idea why?

The height and width are the same are they not?

So I assume this shouldn't happen... : /

Duugu · 11-10-10, 05:37 PM

[quote=lilgulps;217270Rotated it 90 degrees but skews the image slightly, any idea why?[/QUOTE]

Try to add one transparent pixel at all sides of you texture. Without this SetTexCoord can "distort" the texture.