koobas.hobune.stream
How to slide UVs of a GUI Texture
I have a GUI Texture of a boost gauge, the texture contains all 5 states of the boost gauge. Instead of having to cut them up into 5 different textures and swapping them between them when my condition becomes true, I would rather use only 1 texture and "slide" the UVs down to the new boost gauge state.
I tried GUI.DrawTexture but it doesn't work for sliding UVs. I was thinking about using iTween to slide the UVs, but I don't even know how to specify the UV coordinates between which to slide. Does anyone have a good method for sliding UVs on a GUI Texture ?
GUITextures have no access to UVs. You can use a custom plane with an unlit shader, and change renderer.material.mainTextureOffset.
Ah I was beginning to think that, thanks a lot for your quick answer, it saved me lots of "research" time!!!
hmmm it looks like using the begingroup trick below you don't actually need UV's to animate a sprite on GUI
Hi, you can make that using this:
Function OnGUI() {
GUI.BeginGroup(the position and size of the button);
GUI.Label(the main texture);
GUI.EndGroup();
}
then use a functiont to make the image moves an "x" value in the position.x example: the image have a 60 width and have 5 images on it, the width of every image will be 12, so add 12 at every x-time in the position.x in the GUI.Label position so the image looks like a gif animation.
for some reason, gui.label or begingroup forces a stretch or distortion or nonlinear offset error for the sprite frames...
ahh... six hours of trying to find the fudge factor... it looks like it's due to the 3px/4px margin/padding in default gui style!! setting the label margin padding to 0 fixed it!!
The public beta (Unity 3.5 version) now contains
GUI.DrawTextureWithTexCoords(PositionRect, Texture, UVRect);
This works fine with GUI with GUILayout!
Thanks!
Roger
the same thing is available earlier too with graphics.drawtexture ()
not a big difference
But Graphics.DrawTexture() has issues if used within GUILayout. It wont work correctly used in ScrollView() and other elements.
The 3.5 version of DrawTextureWithTexCoords() works perfectly.
Graphics.DrawTexture(PositionRect, Texture, UVRect, 0, 0, 0, 0);
solves the problem with one line of code. This does not include GUILayout, here it will work only with some limitations.
Regards, Roger
