archive/blender-archive
Archived
1
1
Fork 0
Code Pull Requests Packages Activity

mesh.transform() was applying the inverted 4x4 matrix to the normals, without removing the translation part.

Browse Source 
iter with a char value did not allow for -1, my bad, using short now.
This commit is contained in:
Campbell Barton
2006-10-04 17:06:29 +00:00
parent 0f497dea2b
commit 0c6bb8c079
2 changed files with 10 additions and 9 deletions
Download Patch File Download Diff File Expand all files Collapse all files

15
source/blender/python/api2_2x/Mesh.c
View File

@@ -5867,8 +5867,8 @@ static PyObject *Mesh_transform( BPy_Mesh *self, PyObject *args )
if( recalc_normals ) {
/* loop through all the verts and transform normals by the inverse
* of the transpose of the supplied matrix */
float invmat[4][4];
float invmat[4][4], vec[3], nx, ny, nz;
/*
* we only need to invert a 3x3 submatrix, because the 4th component of
* affine vectors is 0, but Mat4Invert reports non invertible matrices
@@ -5884,11 +5884,12 @@ static PyObject *Mesh_transform( BPy_Mesh *self, PyObject *args )
mv = mesh->mvert;
for( i = 0; i < mesh->totvert; i++, mv++ ) {
float vec[3];
vec[0] = (float)(mv->no[0] / 32767.0);
vec[1] = (float)(mv->no[1] / 32767.0);
vec[2] = (float)(mv->no[2] / 32767.0);
Mat4MulVecfl( (float(*)[4])*invmat, vec );
nx= vec[0] = (float)(mv->no[0] / 32767.0);
ny= vec[1] = (float)(mv->no[1] / 32767.0);
nz= vec[2] = (float)(mv->no[2] / 32767.0);
vec[0] = nx*invmat[0][0] + ny*invmat[0][1] + nz*invmat[0][2];
vec[1] = nx*invmat[1][0] + ny*invmat[1][1] + nz*invmat[1][2];
vec[2] = nx*invmat[2][0] + ny*invmat[2][1] + nz*invmat[2][2];
Normalise( vec );
mv->no[0] = (short)(vec[0] * 32767.0);
mv->no[1] = (short)(vec[1] * 32767.0);