Changeset d277229 in sasmodels for sasmodels/models/cylinder.c

Timestamp:

Sep 7, 2018 5:29:38 AM (6 years ago)

Author:

grethevj

Branches:

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

Children:

3c60146

Parents:

2a12351b

Message:

Models updated to include choices for effective interaction radii

File:

• sasmodels/models/cylinder.c (modified) (1 diff)

sasmodels/models/cylinder.c

@@ -11 +11 @@
 {
     return sas_2J1x_x(qab*radius) * sas_sinx_x(qc*0.5*length);
+}
+
+static double
+radius_from_volume(double radius, double length)
+{
+    return cbrt(0.75*radius*radius*length);
+}
+
+static double
+radius_from_diagonal(double radius, double length)
+{
+    return sqrt(radius*radius + 0.25*length*length);
+}
+
+static double
+effective_radius(int mode, double radius, double length)
+{
+    if (mode == 1) {
+        return radius_from_volume(radius, length);
+    } else if (mode == 2) {
+        return radius;
+    } else if (mode == 3) {
+        return 0.5*length;
+    } else if (mode == 4) {
+        return (radius < 0.5*length ? radius : 0.5*length);
+    } else if (mode == 5) {
+        return (radius > 0.5*length ? radius : 0.5*length);
+    } else {
+        return radius_from_diagonal(radius,length);
+    }
 }