Well, I’ve got many UV coordinates of a 3D model clearly in the range 0-1 and many coords in seemingly pixel values in the range 100-300.
How do I know which one to interpret the coordinates as? Is there a standard or system for this?
I notice that each 3d meshes in the exported file may use either system. Is this normal procedure, and if so, how do I interpret the UV texture mapping coordinates to display them correctly in my 3d engine?
Examples of coordinates in the 0-1 system:
vt 1.04017 2.60853
vt -0.984585 -0.0106576
Examples of coordinates measuring by the pixel:
vt -208.397 776.637
vt -208.397 32.6369
What is the file format of your 3D model? Also note that it’s perfectly valid to have UV mapping coordinates ranging outside 0-1, e.g. for wrap or repeat texturing modes (refer to OpenGL or Direct3D texturing mode).