This page is optimized for large screens. Zooming may cause some display problems.
about
About
The constraints table enables to enter the constraints to impose to those of the surfaces declared as constrained in the mandatory parameters table.
For each surface, the constraint parameters are the reference surface to enter in cell ref. surf. and the scaling factor parameters for each parameter of the surface that can be constrained. The scaling factor for a parameter "X" is to enter in cell "X_fac". "Xs" and "Xr" being the values of this parameter respectively for the considered surface and the related reference surface, "Xs" is defined as follows:
"Xs = f*Xr".
if "Xr" is infinite, the scaling factor "f" is disregarded and "Xs" is also infinite.
If "f" is null, the parameter "X" is then considered as not constrained. This allows to select which parameter of a constrained surface is effectively constrained.
Any surface other thaan the object surface and the first surface of a system can be constrained.
For non constrained surfaces, all cells of the corresponding line are disabled. For constrained surfaces, only the parameters active for both the constrained surface and the reference one can be constrained. Therefore, only the cells corresponding to the scaling factors of the constrained parameters are activated.
For a surface newly declared as constrained in the mandatory parameters table, the reference surface is by default the first surface of the system. By default also, the scaling factor of a constrained parameter is defined so that the value of the parameter is the same as just before the surface was declared as constrained. Obviously both the reference surface and the scaling factors can be changed in the constraints table.
The reference surface can be any surface before the considered one other than the object surface.