Inside Macintosh: QuickDraw GX Graphics /

Chapter 2 - Geometric Shapes / Geometric Shapes Reference

Functions / Getting and Setting Shape Geometries

GXSetCurve

You can use the GXSetCurve function to change the geometry of a curve shape.

void GXSetCurve(gxShape target, const gxCurve *data);

target

A reference to the curve shape whose geometry you want to change.

data

A pointer to the new curve geometry.

DESCRIPTION

The GXSetCurve function copies the geometry information from the data parameter into the geometry property of the target shape. If the target shape is not a curve shape, this function replaces the target shape with a curve shape and sets the shape fill to open-frame fill.

You must provide a pointer to a gxCurve structure in the data parameter--if you pass nil for this parameter, the function posts the error code parameter_is_nil.

If the target shape is locked (that is, its gxLockedShape shape attribute is set), this function posts the error shape_access_not_allowed.

ERRORS, WARNINGS, AND NOTICES

Errors
out_of_memory
shape_is_nil
parameter_is_nil	(debugging version)
shape_access_not_allowed	(debugging version)

SEE ALSO

For general information about curve geometries, see "Curve Shapes" on page 2-18.

For the definition of the gxCurve structure, see page 2-105.

To create a new curve shape, use the GXNewCurve function, which is described on page 2-113.

To examine the geometry of an existing curve shape, use the GXGetCurve function, which is described on page 2-125.

To draw a curve geometry without creating a curve shape, use the GXDrawCurve function, which is described on page 2-159. To draw a curve shape, use the GXDrawShape function, which is described in the chapter "Shape Objects" in Inside Macintosh: QuickDraw GX Objects.

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