Changeset 18a2bfc in sasmodels for sasmodels/models/lib/wrc_cyl.c

Timestamp:

Oct 4, 2017 6:25:40 PM (7 years ago)

Author:

Paul Kienzle <pkienzle@…>

Branches:

master, core_shell_microgels, costrafo411, magnetic_model, ticket-1257-vesicle-product, ticket_1156, ticket_1265_superball, ticket_822_more_unit_tests

Children:

ced5bd2

Parents:

a8631ca

Message:

flexible_cylinder: add details about testing

File:

• sasmodels/models/lib/wrc_cyl.c (modified) (2 diffs)

sasmodels/models/lib/wrc_cyl.c

@@ -192 +192 @@
     double ans;
 
+
     if( L > 4*b ) { // L > 4*b : Longer Chains
         if (q*b <= 3.1) {
@@ -200 +201 @@
     } else { // L <= 4*b : Shorter Chains
         if (q*b <= q0short) { // q*b <= fmax(1.9/Rg_short, 3)
+            //printf("branch C-%d q=%g L=%g b=%g\n", square(q*Rg_short)<DEBYE_CUTOFF, q, L, b);
+            // Note that q0short is usually 3, but it will be greater than 3
+            // small enough b, depending on the L/b ratio:
+            //     L/b == 1 => b < 2.37
+            //     L/b == 2 => b < 1.36
+            //     L/b == 3 => b < 1.00
+            //     L/b == 4 => b < 0.816
             // 2017-10-01 pkienzle: moved low q approximation into Sdebye()
-            //printf("branch C-%d q=%g L=%g b=%g\n", square(q*Rg_short)<DEBYE_CUTOFF, q, L, b);
             ans = Sdebye(square(q*Rg_short));
         } else {  // q*b > max(1.9/Rg_short, 3)