quite a load is still hidden behind the define #ifdef _work_on_sb_solver

a glance to view is the "STU PID semi implicit euler"
most of the work to implement a semi implicit euler was done ..
now i am dealing  with the tradeoffs between 'calculation time' which is quite expensive .. inverting a 0(n*n) sparse matrix /* once agian thanks to brecht for his work on making sparse matrices LU decomposition and evaluating inverses that easy*/  putting it into and cropping works pretty nice .. argh off topic again
...
while i spent a little time on reading recent papers i found :

1. control on springs needs to be split in pushing and pulling  /* fabric pushes easy but pulls hard */
2. diagonals on 4-gons (in the current SB model) can be seen as shear .. thus need a contol to modify .. this commit wil add it
3. 2 nd order springs /*aka rigidity */ can focus on bending .. thus renaming 'em
 
i have no idea how i would provide backward compatiblity, but the spots i marked in code :)

1 files changed, 4 insertions, 1 deletions

diff --git a/source/blender/makesdna/DNA_object_force.h b/source/blender/makesdna/DNA_object_force.h
index df17454adeb..0cee849940b 100644
--- a/source/blender/makesdna/DNA_object_force.h
+++ b/source/blender/makesdna/DNA_object_force.h
@@ -129,10 +129,13 @@ typedef struct SoftBody {
 		minloops,
 		maxloops,
 		choke,
-		pad3,pad4,pad5
+		solver_ID,
+		pad4,pad5
 		;   
 
 	struct SBScratch *scratch;	/* scratch pad/cache on live time not saved in file */
+	float shearstiff;
+	float inpush;
 
 } SoftBody;