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Canvas Pocket Reference
book

Canvas Pocket Reference

by David Flanagan
December 2010
Intermediate to advanced
110 pages
2h 31m
English
O'Reilly Media, Inc.
Content preview from Canvas Pocket Reference

Name

CRC.createRadialGradient() — creates a radial color gradient

Synopsis

CanvasGradient createRadialGradient(float xStart, 
                                    float yStart, 
                                    float radiusStart,
                                    float xEnd, 
                                    float yEnd,
                                    float radiusEnd)

Arguments

xStart, yStart

The coordinates of the center of the starting circle

radiusStart

The radius of the starting circle

xEnd, yEnd

The coordinates of the center of the ending circle

radiusEnd

The radius of the ending circle

Returns

A CanvasGradient object representing a radial color gradient.

Description

This method creates and returns a new CanvasGradient object that radially interpolates colors between the circumferences of the two specified circles. Note that this method does not specify any colors for the gradient. Use the addColorStop() method of the returned object to do that. To stroke lines or fill areas using a gradient, assign a CanvasGradient object to the strokeStyle or fillStyle properties.

Radial gradients are rendered by using the color at offset 0 for the circumference of the first circle, the color at offset 1 for the second circle, and interpolated color values at circles between the two.

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Publisher Resources

ISBN: 9781449398941Errata Page