diff --git a/src/bounce/softbody/softbody.cpp b/src/bounce/softbody/softbody.cpp
index 140e85b..6a66a6f 100644
--- a/src/bounce/softbody/softbody.cpp
+++ b/src/bounce/softbody/softbody.cpp
@@ -239,17 +239,18 @@ static B3_FORCE_INLINE void b3SetK(b3Mat33 K[16], float32 Ke[144])
 	// a41 a42 a43	
 	// a51 a52 a53		
 	// a61 a62 a63	
-	k21.x.x = Ke[3 + 12 * 0];
-	k21.x.y = Ke[4 + 12 * 0];
-	k21.x.z = Ke[5 + 12 * 0];
+	//k21.x.x = Ke[3 + 12 * 0];
+	//k21.x.y = Ke[4 + 12 * 0];
+	//k21.x.z = Ke[5 + 12 * 0];
 
-	k21.y.x = Ke[3 + 12 * 1];
-	k21.y.y = Ke[4 + 12 * 1];
-	k21.y.z = Ke[5 + 12 * 1];
+	//k21.y.x = Ke[3 + 12 * 1];
+	//k21.y.y = Ke[4 + 12 * 1];
+	//k21.y.z = Ke[5 + 12 * 1];
 
-	k21.z.x = Ke[3 + 12 * 2];
-	k21.z.y = Ke[4 + 12 * 2];
-	k21.z.z = Ke[5 + 12 * 2];
+	//k21.z.x = Ke[3 + 12 * 2];
+	//k21.z.y = Ke[4 + 12 * 2];
+	//k21.z.z = Ke[5 + 12 * 2];
+	k21 = b3Transpose(k12);
 
 	// k22	            
 	// a44 a45 a46	
@@ -303,33 +304,35 @@ static B3_FORCE_INLINE void b3SetK(b3Mat33 K[16], float32 Ke[144])
 	// a71 a72 a73	
 	// a81 a82 a83	
 	// a91 a92 a93	
-	k31.x.x = Ke[6 + 12 * 0];
-	k31.x.y = Ke[7 + 12 * 0];
-	k31.x.z = Ke[8 + 12 * 0];
+	//k31.x.x = Ke[6 + 12 * 0];
+	//k31.x.y = Ke[7 + 12 * 0];
+	//k31.x.z = Ke[8 + 12 * 0];
 
-	k31.y.x = Ke[6 + 12 * 1];
-	k31.y.y = Ke[7 + 12 * 1];
-	k31.y.z = Ke[8 + 12 * 1];
+	//k31.y.x = Ke[6 + 12 * 1];
+	//k31.y.y = Ke[7 + 12 * 1];
+	//k31.y.z = Ke[8 + 12 * 1];
 
-	k31.z.x = Ke[6 + 12 * 2];
-	k31.z.y = Ke[7 + 12 * 2];
-	k31.z.z = Ke[8 + 12 * 2];
+	//k31.z.x = Ke[6 + 12 * 2];
+	//k31.z.y = Ke[7 + 12 * 2];
+	//k31.z.z = Ke[8 + 12 * 2];
+	k31 = b3Transpose(k13);
 
 	// k32	
 	// a74 a75 a76	
 	// a84 a85 a86	
 	// a94 a95 a96	
-	k32.x.x = Ke[6 + 12 * 3];
-	k32.x.y = Ke[7 + 12 * 3];
-	k32.x.z = Ke[8 + 12 * 3];
+	//k32.x.x = Ke[6 + 12 * 3];
+	//k32.x.y = Ke[7 + 12 * 3];
+	//k32.x.z = Ke[8 + 12 * 3];
 
-	k32.y.x = Ke[6 + 12 * 4];
-	k32.y.y = Ke[7 + 12 * 4];
-	k32.y.z = Ke[8 + 12 * 4];
+	//k32.y.x = Ke[6 + 12 * 4];
+	//k32.y.y = Ke[7 + 12 * 4];
+	//k32.y.z = Ke[8 + 12 * 4];
 
-	k32.z.x = Ke[6 + 12 * 5];
-	k32.z.y = Ke[7 + 12 * 5];
-	k32.z.z = Ke[8 + 12 * 5];
+	//k32.z.x = Ke[6 + 12 * 5];
+	//k32.z.y = Ke[7 + 12 * 5];
+	//k32.z.z = Ke[8 + 12 * 5];
+	k32 = b3Transpose(k23);
 
 	// k33 
 	// a77 a78 a79 
@@ -367,49 +370,52 @@ static B3_FORCE_INLINE void b3SetK(b3Mat33 K[16], float32 Ke[144])
 	// a10_1 a10_2 a10_3	
 	// a11_1 a11_2 a11_3	
 	// a12_1 a12_2 a12_3	
-	k41.x.x = Ke[9 + 12 * 0];
-	k41.x.y = Ke[10 + 12 * 0];
-	k41.x.z = Ke[11 + 12 * 0];
+	//k41.x.x = Ke[9 + 12 * 0];
+	//k41.x.y = Ke[10 + 12 * 0];
+	//k41.x.z = Ke[11 + 12 * 0];
 
-	k41.y.x = Ke[9 + 12 * 1];
-	k41.y.y = Ke[10 + 12 * 1];
-	k41.y.z = Ke[11 + 12 * 1];
+	//k41.y.x = Ke[9 + 12 * 1];
+	//k41.y.y = Ke[10 + 12 * 1];
+	//k41.y.z = Ke[11 + 12 * 1];
 
-	k41.z.x = Ke[9 + 12 * 2];
-	k41.z.y = Ke[10 + 12 * 2];
-	k41.z.z = Ke[11 + 12 * 2];
+	//k41.z.x = Ke[9 + 12 * 2];
+	//k41.z.y = Ke[10 + 12 * 2];
+	//k41.z.z = Ke[11 + 12 * 2];
+	k41 = b3Transpose(k14);
 
 	// k42 
 	// a10_4 a10_5 a10_6 
 	// a11_4 a11_5 a11_6 
 	// a12_4 a12_5 a12_6 
-	k42.x.x = Ke[9 + 12 * 3];
-	k42.x.y = Ke[10 + 12 * 3];
-	k42.x.z = Ke[11 + 12 * 3];
+	//k42.x.x = Ke[9 + 12 * 3];
+	//k42.x.y = Ke[10 + 12 * 3];
+	//k42.x.z = Ke[11 + 12 * 3];
 
-	k42.y.x = Ke[9 + 12 * 4];
-	k42.y.y = Ke[10 + 12 * 4];
-	k42.y.z = Ke[11 + 12 * 4];
+	//k42.y.x = Ke[9 + 12 * 4];
+	//k42.y.y = Ke[10 + 12 * 4];
+	//k42.y.z = Ke[11 + 12 * 4];
 
-	k42.z.x = Ke[9 + 12 * 5];
-	k42.z.y = Ke[10 + 12 * 5];
-	k42.z.z = Ke[11 + 12 * 5];
+	//k42.z.x = Ke[9 + 12 * 5];
+	//k42.z.y = Ke[10 + 12 * 5];
+	//k42.z.z = Ke[11 + 12 * 5];
+	k42 = b3Transpose(k24);
 
 	// k43 
 	// a10_7 a10_8 a10_9 
 	// a11_7 a11_8 a11_9 
 	// a12_7 a12_8 a12_9 
-	k43.x.x = Ke[9 + 12 * 6];
-	k43.x.y = Ke[10 + 12 * 6];
-	k43.x.z = Ke[11 + 12 * 6];
+	//k43.x.x = Ke[9 + 12 * 6];
+	//k43.x.y = Ke[10 + 12 * 6];
+	//k43.x.z = Ke[11 + 12 * 6];
 
-	k43.y.x = Ke[9 + 12 * 7];
-	k43.y.y = Ke[10 + 12 * 7];
-	k43.y.z = Ke[11 + 12 * 7];
+	//k43.y.x = Ke[9 + 12 * 7];
+	//k43.y.y = Ke[10 + 12 * 7];
+	//k43.y.z = Ke[11 + 12 * 7];
 
-	k43.z.x = Ke[9 + 12 * 8];
-	k43.z.y = Ke[10 + 12 * 8];
-	k43.z.z = Ke[11 + 12 * 8];
+	//k43.z.x = Ke[9 + 12 * 8];
+	//k43.z.y = Ke[10 + 12 * 8];
+	//k43.z.z = Ke[11 + 12 * 8];
+	k43 = b3Transpose(k34);
 
 	// k44
 	// a10_10 a10_11 a10_12
@@ -427,6 +433,7 @@ static B3_FORCE_INLINE void b3SetK(b3Mat33 K[16], float32 Ke[144])
 	k44.z.y = Ke[10 + 12 * 11];
 	k44.z.z = Ke[11 + 12 * 11];
 }
+
 b3SoftBody::b3SoftBody(const b3SoftBodyDef& def)
 {
 	B3_ASSERT(def.mesh);