18961 2012-09-21 20:44:48 +0000 The pseudo-code for matrix-decomposing has a typo in the check for a coordinate system flip 2012-10-18 18:35:42 +0000 1 1 1 Unclassified CSS Transforms unspecified All All RESOLVED FIXED P2 minor --- 1 nrajbhan smfr ayg cmarrin dino dschulze eoconnor smfr public-css-bugzilla oldest_to_newest 74259 0 nrajbhan 2012-09-21 20:44:48 +0000 Steps: 1. Go to http://dev.w3.org/csswg/css3-transforms/#matrix-decomposing 2. Look at the following check for a coordinate system flip: Actual: scale[0] *= -1 should be scale[i] *= -1 // At this point, the matrix (in rows) is orthonormal. // Check for a coordinate system flip. If the determinant // is -1, then negate the matrix and the scaling factors. pdum3 = cross(row[1], row[2]) if (dot(row[0], pdum3) < 0) for (i = 0; i < 3; i++) scale[0] *= -1; row[i][0] *= -1 row[i][1] *= -1 row[i][2] *= -1 Expected: // At this point, the matrix (in rows) is orthonormal. // Check for a coordinate system flip. If the determinant // is -1, then negate the matrix and the scaling factors. pdum3 = cross(row[1], row[2]) if (dot(row[0], pdum3) < 0) for (i = 0; i < 3; i++) scale[i] *= -1; row[i][0] *= -1 row[i][1] *= -1 row[i][2] *= -1 76600 1 dschulze 2012-10-18 18:35:42 +0000 Thank you for reporting. Fixed now.