pgtrans

Shift, scale and/or rotate a polygon.

Usage

pgtrans(X, IX {, DX, DY), KX, KY, A})

X

a closed point-list or a polygon-stream defining one or more polygons.

IX

The index of the polygon of X to be tested; 0 <= IX < pgget(X)

DX, DY

shift values for x and y (default=0, no shift)

shift the center point <XC,YC> of polygon X_IX to <XC+DX,YC+YC>

KX, KY

scaling factors; both factors must be greater than zero (default=1, no scaling)

A

rotation angle in degree (default=0, no rotation); a scaling factors (default=1)

rotate the polygon around the center point

Result

The result r is a polygon-stream containing the transformed X_IX.

See also

pginit, pgget, pgitest, pgxgrid, pgsplit, pgtrans, pghull

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