# Changeset 1916c52 in sasmodels

Ignore:
Timestamp:
Apr 7, 2017 5:56:11 AM (3 years ago)
Branches:
master, core_shell_microgels, costrafo411, magnetic_model, ticket-1257-vesicle-product, ticket_1156, ticket_1265_superball, ticket_822_more_unit_tests
Children:
e6ab0d3
Parents:
14207bb
Message:

more bugs in oriened assym particles docs

Location:
sasmodels/models
Files:
4 edited

### Legend:

Unmodified
 r14207bb .. note:: This model was originally ported from NIST IGOR macros. However,t is not yet fully understood by the SasView developers and is currently review. This model was originally ported from NIST IGOR macros. However, it is not yet fully understood by the SasView developers and is currently under review. The form factor is normalized by the particle volume $V$ such that $(=t_C)$ faces. The projection in the $AB$ plane is then .. image:: img/core_shell_parallelepiped_projection.png .. image:: img/core_shell_parallelepiped_projection.jpg The volume of the solid is F_{a}(Q,\alpha,\beta)= \left[\frac{\tfrac{1}{2}\sin(Q(L_A+2t_A)\sin\alpha \sin\beta)}{\tfrac{1}{2}Q(L_A+2t_A)\sin\alpha\sin\beta} \left[\frac{\sin(\tfrac{1}{2}Q(L_A+2t_A)\sin\alpha \sin\beta)}{\tfrac{1}{2}Q(L_A+2t_A)\sin\alpha\sin\beta} - \frac{\sin(\tfrac{1}{2}QL_A\sin\alpha \sin\beta)}{\tfrac{1}{2}QL_A\sin\alpha \sin\beta} \right] \left[\frac{\sin(\tfrac{1}{2}QL_B\sin\alpha \sin\beta)}{\tfrac{1}{2}QL_B\sin\alpha \sin\beta} \right] .. note:: Why does t_B not appear in the above equation? For the calculation of the form factor to be valid, the sides of the solid MUST be chosen such that** $A < B < C$. MUST (perhaps not any more?) be chosen such that** $A < B < C$. If this inequality is not satisfied, the model will not report an error, but the calculation will not be correct and thus the result wrong. Definition of the angles for oriented core-shell parallelepipeds. .. figure:: img/parallelepiped_angle_projection.jpg .. figure:: img/parallelepiped_angle_projection.png Examples of the angles for oriented core-shell parallelepipeds against the