Hello,

When creating an AWDSceneBlock in libawd, the transform matrix is set by default to the 4x4 identity matrix (scene.cc line 17). When writing the scene to a file, only the first 12 elements are written, because it is supposed to be a 4x3 matrix (scene.cc line 45). The problem is, truncating the 4x4 identity matrix to the first 12 elements doesn’t make a 4x3 identity matrix, because the matrix is stored column by column and not line by line. The resulting 4x3 matrix is :

This causes the scene block to have an incorrect transform matrix by default.

ps : there is also en error in the specification document, at the top of page 21 : the document states that the transform matrix is a 128 byte 4x4 matrix, but it is encoded de facto as a 48 byte 4x3 matrix.

Martin Bousquet

ps 2 : i know this is not the section to report bugs, but i don’t seem to find the section github about libawd…

I don’t know how away3D handles matrices but what if you the bytes are flipped the other way?

using the bytes in the following order

the matrix would become

Just the last row that is missing, but if the position is stored in 4,1 4,2, and 4,3 then I don’t think that row is needed. I could be wrong though.