astAxOffset

Add an increment onto a supplied axis value

Description:

This function returns an axis value formed by adding a signed axis increment onto a supplied axis value.

For a simple Frame, this is a trivial operation returning the sum of the two supplied values. But for other derived classes of Frame (such as a SkyFrame) this is not the case.

Synopsis

double astAxOffset( AstFrame this, int axis, double v1, double dist )

Parameters:

this
Pointer to the Frame.
axis
The index of the axis to which the supplied values refer. The first axis has index 1.
v1
The original axis value.
dist
The axis increment to add to the original axis value.

Returned Value

astAxOffset
The incremented axis value.

Notes: