See also : Editor interface overview.
The atlas builder is the tool used to generate Popcorn's atlas files.
It currently can't be launched directly from the main popcorn editor.
Atlas definition format, pkat files
The atlas definition files (.pkat files) are simple text files, usually with the same name as the atlas texture, with a .txt extension, and contain:
- one line per sub-texture
- 4 values per line, separated by commas
- the decimal point is a dot, not a comma
- the values are normalized texture coordinates, between
- the values are in the following order: left corner, top corner, right corner, bottom corner
for example, for a 2*2 texture atlas containing 4 equal-sized squared textures, the atlas definition file would look like:
0, 0, 0.5, 0.5 0.5, 0, 1, 0.5 0, 0.5, 0.5, 1 0.5, 0.5, 1, 1
Of course, the sub-rectangles can be anything, the whole texture doesn't have to be covered entirely either:
0, 0, 0.333, 0.5 0.333, 0, 0.667, 0.5 0.667, 0, 1, 0.5
Right-click Save As: