pointsAtZ attribute represent the X location in the coordinate system established by attribute
primitiveUnits on the
<filter> element of the point at which the light source is pointing, assuming that, in the initial coordinate system, the positive Z-axis comes out towards the person viewing the content and assuming that one unit along the Z-axis equals one unit in X and Y.
If the attribute is not specified, then the effect is as if a value of 0 were specified.
|Normative document||SVG 1.1 (2nd Edition)|
The following elements can use the