cairoPatternCreateRadial: cairoPatternCreateRadial

Description Usage Arguments Details Value Author(s)

View source: R/cairoFuncs.R

Description

Creates a new radial gradient CairoPattern between the two circles defined by (cx0, cy0, radius0) and (cx1, cy1, radius1). Before using the gradient pattern, a number of color stops should be defined using cairoPatternAddColorStopRgb or cairoPatternAddColorStopRgba.

Usage

1
cairoPatternCreateRadial(cx0, cy0, radius0, cx1, cy1, radius1)

Arguments

cx0

[numeric] x coordinate for the center of the start circle

cy0

[numeric] y coordinate for the center of the start circle

radius0

[numeric] radius of the start circle

cx1

[numeric] x coordinate for the center of the end circle

cy1

[numeric] y coordinate for the center of the end circle

radius1

[numeric] radius of the end circle

Details

Note: The coordinates here are in pattern space. For a new pattern, pattern space is identical to user space, but the relationship between the spaces can be changed with cairoPatternSetMatrix.

Value

[CairoPattern] the newly created CairoPattern if successful, or an error pattern in case of no memory. This function will always return a valid pointer, but if an error occurred the pattern status will be set to an error. To inspect the status of a pattern use cairoPatternStatus.

Author(s)

Derived by RGtkGen from GTK+ documentation


RGtk2 documentation built on Oct. 14, 2021, 5:08 p.m.