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transform: Implement transform_point() for dihedrals

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No longer using the default path and risking rounding issues.
This commit is contained in:
Benjamin Otte 2024-07-09 11:38:40 +02:00
parent 555f7d5404
commit 5f719c8ea3
1 changed files with 13 additions and 1 deletions
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14
gsk/gsktransform.c
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@ -2432,11 +2432,23 @@ gsk_transform_transform_point (GskTransform *self,
}
break;
case GSK_FINE_TRANSFORM_CATEGORY_2D_DIHEDRAL:
{
GdkDihedral dihedral;
float xx, xy, yx, yy, dx, dy, scale_x, scale_y;
gsk_transform_to_dihedral (self, &dihedral, &scale_x, &scale_y, &dx, &dy);
gdk_dihedral_get_mat2 (dihedral, &xx, &xy, &yx, &yy);
*out_point = GRAPHENE_POINT_INIT ((xx * point->x + xy * point->y) * scale_x + dx,
(yx * point->x + yy * point->y) * scale_y + dy);
}
break;
case GSK_FINE_TRANSFORM_CATEGORY_UNKNOWN:
case GSK_FINE_TRANSFORM_CATEGORY_ANY:
case GSK_FINE_TRANSFORM_CATEGORY_3D:
case GSK_FINE_TRANSFORM_CATEGORY_2D:
case GSK_FINE_TRANSFORM_CATEGORY_2D_DIHEDRAL:
default:
{
graphene_matrix_t mat;