Inside Macintosh: QuickDraw GX Environment and Utilities /

Chapter 8 - QuickDraw GX Mathematics / QuickDraw GX Mathematics Reference

Mapping Functions / Manipulating and Applying Mappings

MapPoints

You can use the MapPoints function to apply a mapping to each of the points in an array.

void MapPoints(const gxMapping *source, long count, 
               gxPoint vector[]);

source

A pointer to the mapping that is to be applied to the array of points.

count

The number of points in the array.

vector

The array of points to which the mapping is to be applied. On return, the array contains the transformed points.

ERRORS, WARNINGS, AND NOTICES

Errors

mapping_is_nil

parameter_is_nil

number_of_points_exceeds_implementation_limit

Warnings

map_points_out_of_range

SEE ALSO

For an example of a function that applies a mapping to a single point, see Listing 8-2 on page 8-30.