#176 Extrusions along X axis rotated incorrectly

open
John Stewart
None
5
2007-01-05
2006-08-20
C.Horn
No

In v1.18.3 Extrusions with a spine along the X axis
have their
cross-sections rotated incorrectly. Extrusions
extruded along the Y and
Z axis are fine.

The attched .wrl contains three Extrusion nodes.

All three have the same cross section, an isoceles
triangle (so it is clear which way it is pointing).
crossSection [ 1 1, 0 -2, -1 1, 1 1 ]

The spines are along each of the three axes, Y (top) ,
X (middle), Z(bottom), starting at 0 0 0, and ending 4
units along the respective axis.

The triangle of the middle extrusion (along the X
axis: spine [ 0 0 0, 4 0 0 ]) should be 'pointing'
towards the negative Z axis as in the second image
(attached), not along the positive Y axis as v1.18.3
does.

My understanding of the extrusion node (based on http:/
/tecfa.unige.ch/guides/vrml/vrml97/spec/part1/
nodesRef.html#Extrusion) is that the middle extrusion
should look like the extruison in Y (top extrusion),
rotated 90 degrees about the Z axis.

Discussion

  • C.Horn
    C.Horn
    2006-08-20

    Test wrl with three extrusions

     
    Attachments
  • C.Horn
    C.Horn
    2006-08-20

    FreeWRL 1.18.3 render

     
  • C.Horn
    C.Horn
    2006-08-20

    middle extrusion with correct rotation

     
  • John Stewart
    John Stewart
    2007-01-05

    Logged In: YES
    user_id=58616
    Originator: NO

    Thanks for the bug report.

     
  • John Stewart
    John Stewart
    2007-01-05

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