procedure sbslic
This subroutine plots a "grey-scale" slice through a unit-cell of density. All (x,y,z) values are taken to be given in world coordinates. The z-component of the eye-poisition should be positive and that of all the lattice-vertices should be negative; the viewing-screen is fixed at z=0.
Syntax
sbslic EYE,LATICE,DENS,N1,N2,N3,DLOW,DHIGH,IC1,IC2,SLNORM,APOINT,ICEDGE
Arguments
| ARGUMENT | TYPE I/O DIMENSION DESCRIPTION |
| EYE: | R*4 I 3 (x,y,z) coordinate of eye-position. |
| LATICE: | R*4 I 3 x 4 (x,y,z) coordinates of the origin |
| and the a, b & C lattice-vertices. | |
| DENS: | R*4 I (N1+1) The density at regular points within |
| x (N2+1) the unit cell, wrapped around so | |
| x (N3+1) that DENS(0,J,K)=DENS(N1,J,K) etc.. | |
| N1,N2,N3: | I*4 I - The dimensions of the unit-cell grid. |
| DLOW: | R*4 I - Density for the lowest colour-index. |
| DHIGH: | R*4 I - Density for the highest colour-index. |
| IC1,IC2: | I*4 I - Lowest & highest colour-index to be |
| used for the shading. | |
| SLNORM: | R*4 I 3 (x,y,z) direction of the normal to |
| the slice to be "grey-scaled". | |
| APONIT: | R*4 I 3 (x,y,z) coordinate of a point within |
| the slice to be "grey-scaled". | |
| ICEDGE: | I*4 I - If >=0, it's the colour-index for the |
| boundary of the "grey-scaled" slice. |