feDiffuseLighting: Light an image using the alpha channel as a bump map.

Description

This filter primitive lights an image using the alpha channel as a bump map. The resulting image is an RGBA opaque image based on the light colour with alpha = 1 everywhere. The lighting calculation follows the standard diffuse component of the Phong lighting model. The resulting image depends on the light colour, light position and surface geometry of the input bump map.

Usage

feDiffuseLighting(input = NA,
                  surfaceScale = 1, diffuseConstant = 1,
                  kernelUnitLength = NA, col = "white",
                  lightSource = NULL, ...)

Arguments

input

Identifies an input for this filter primtive. See filterInputs.

surfaceScale

Scale applied to the input alpha surface.

diffuseConstant

kd in the Phong lighting model. Must be non-negative.

kernelUnitLength

The first number is the dx value. The second number is the dy value. If the dy value is not specified, it defaults to the same value as dx. Indicates the intended distance in current filter u

col

The colour to apply to the light from lightSource.

lightSource

A light source object, produced by one of feDistantLight, fePointLight, or feSpotLight

...

Further arguments to be passed onto fe.

Value

An fe.diffuse.lighting object.

Details

For more information about this primitive, consult the reference to the SVG specification.

References

http://www.w3.org/TR/SVG/filters.html#feDiffuseLightingElement