ISSUE-2285: Resolving @primitiveUnits and z attribute discrepancies

z_primitiveunits

Resolving @primitiveUnits and z attribute discrepancies

State:

RAISED

Product:

Module: Filters

Raised by:

Erik Dahlström

Opened on:

2009-06-29

Description:

The feSpotLight@z and fePointLight@z attributes[1], claim to be depending on @primitiveUnits. As per the units section[2] that means that if primitiveUnits=objectBoundingBox the values are computed as percentages of sqrt((boxwidth)**2 + (boxheight)**2))/sqrt(2).

The question is: is this intuitive and does it give useful behaviour considering Z is an axis for which no coordinatesystem has been defined? Also feSpotLight@pointAtZ doesn't seem to depend on @primitiveUnits unlike @pointAtX and @pointAtY. Should @pointsAtZ be treated like @z wrt @primitiveUnits, or should @z not depend on @primitiveUnits at all?

[1] http://www.w3.org/TR/SVG11/filters.html#feSpotLight
[2] http://www.w3.org/TR/SVG11/coords.html#Units

Related Actions Items:

• ACTION-2634 on Erik Dahlström to Create filter tests that test the Z units for feSpotLight and fePointLight and create some wording to address ISSUE-2285 - due 2009-07-15, closed

Related emails:

1. SVG/modules/filters/master SVGFilter.html,1.31,1.32 (from cvsmail@w3.org on 2009-09-30)
2. Minutes, 27 September 2009 SVG WG F2F - Day 2 (from anthony.grasso@cisra.canon.com.au on 2009-09-29)
3. Minutes, 28 September 2009 SVG WG F2F - Day 3 (from ed@opera.com on 2009-09-28)
4. SVG/profiles/1.1F2/master changes.html,1.52,1.53 (from cvsmail@w3.org on 2009-09-28)
5. SVG/profiles/1.1F2/master filters.html,1.18,1.19 (from cvsmail@w3.org on 2009-09-28)
6. Minutes, July 7 2009 SVG WG telcon (from anthony.grasso@cisra.canon.com.au on 2009-07-08)
7. Fw: Agenda, July 7 2009 SVG WG telcon (from cam@mcc.id.au on 2009-07-07)
8. Agenda, July 7 2009 SVG WG telcon (from cam@mcc.id.au on 2009-07-07)
9. Agenda, July 1 2009 SVG WG telcon (from ed@opera.com on 2009-06-30)
10. Agenda, July 1 2009 SVG WG telcon (from ed@opera.com on 2009-06-30)
11. ISSUE-2285 (z_primitiveunits): Resolving @primitiveUnits and z attribute discrepancies [SVG Filters 1.2] (from sysbot+tracker@w3.org on 2009-06-29)

Related notes:

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