Module transform 

Transform propagation — parent-child coordinate hierarchy.

plCoordinateInterface maintains local-to-parent and local-to-world matrices. When a parent moves, all children recompute their world transforms.

C++ ref: pnSceneObject/plCoordinateInterface.h/.cpp

Functions

mat44_identity

Create an identity 4x4 matrix.

mat44_is_identity

Check if a matrix is identity.

mat44_multiply

Multiply two 4x4 matrices stored as [f32; 16] in row-major order. hsMatrix44 is row-major: fMap[row][col], flat index = row*4+col.

mat44_transform_direction

Transform a direction (no translation) by a row-major 4x4 matrix.

mat44_transform_point

Transform a point by a row-major 4x4 matrix.

mat44_translation

Extract translation from a row-major 4x4 matrix. Translation is at fMap[0][3]=m[3], fMap[1][3]=m[7], fMap[2][3]=m[11].

propagate_transform

Propagate transforms through a parent-child hierarchy.