topic PRISM_ STATUS CODES: EDGE NOT SHOWING ON CYLINDER-LIKE PRISM in Libraries & objects

PRISM_ STATUS CODES: EDGE NOT SHOWING ON CYLINDER-LIKE PRISM

Anonymous — Sun, 08 Sep 2019 10:28:22 GMT

Hello,

I am creating a simple spout object and I have set the status code to make the bottom edge visible and side surface present. This works great in 3D, however in 2D the outlines of the Prism_ are not showing. I have had a look at Barry Kelly's code for his simple spout and I can't quite work out how he has managed to show the side outer edges in 2D & 3D.

Cheers in advance!

my code is as follows:

PRISM_ 2, spoutLength-(elbowLength+wallPlateLength),
0, 0, 909,
spoutDiameter/2, 360, 4011

Re: PRISM_ STATUS CODES: EDGE NOT SHOWING ON CYLINDER-LIKE PRISM

Barry Kelly — Sun, 08 Sep 2019 15:08:29 GMT

Instead of making the prism with one centre point and a 360° arc, start with a side node, then the centre, then a 180° arc.
This will give half the cylinder.
Complete with the other half (same but negative distance).
I always like to finish back at the starting point - so 7 instructions in all.

By staring on an edge you will have better control with the masking codes.
15 will show all edges including the vertical edges - this is important for the +64 mask.
-4 will hide the top edge.
+64 will give a view dependent edge on the curved (they are not really curves but a series of flat segments) so it will always appear if there is and edge as you rotate the prism.

There will be other ways to do this as well.

PRISM_ 7, spoutLength-(elbowLength+wallPlateLength),
spoutDiameter/2, 0, 15-4+64,
0, 0, 900,
0, 180, 4000,
-spoutDiameter/2, 0, 15-4+64,
0, 0, 900,
0, 180, 4000,
spoutDiameter/2, 0, -1

Barry.

Re: PRISM_ STATUS CODES: EDGE NOT SHOWING ON CYLINDER-LIKE PRISM

Anonymous — Mon, 09 Sep 2019 03:40:00 GMT

I understand now, thanks for breaking that down for me Barry. This will be a very useful trick when creating future objects.

Cheers,

Jarrod