Current location:

Create Shadow

Applicability:

Cadcorp SIS Map Modeller
Cadcorp SIS ActiveX Modeller

Ribbon Group:

Analysis-Grids

Map Window:

Conditions for use:

Item Class: Grid
Minimum number selected: 1
Minimum item status: Hittable

Associated commands:

Description:

Create Shadow creates a transparent monochrome Bitmap on top of the selected Grid item. The monochrome Bitmap item will have black pixels wherever the Grid item is steep enough.

This simulates the cartographic process of showing the aspect of the land over mountainous regions.

The shadow effect is achieved by shading certain cells that are on a user-defined sun bearing and gradient. A transparent monochrome bitmap is created which is displayed over the grid making some areas darker, thus simulating a shadow.

To create a shadow from a grid item:

Select the Grid item.
Select Create Shadow or Create Shadow... from the Map Window.
In the Create Grid Shadow dialog, specify your sun bearing and gradient:

Sun bearing (angle from North)

The angle of the sun, in degrees from the North (North is 0, East is 90 and so on).

Gradient

This is the gradient between adjacent Grid cells that will cause a shaded pixel to be drawn. For instance, say you made this value 10. If the difference between adjacent cells is less than 10, a shaded pixel will not be drawn. If the difference is 11 or more, then you will get a shaded pixel.

The shadow is created as a semi-transparent bitmap image draped over the grid.

Top of page AComCreateGridShadow

Send comments on this topic.

Click to return to www.cadcorp.com