Line renderer alignment | Official Unity Discord | Page 1

spare mulch Oct 13, 2022, 5:08 AM

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Wait, has this been a thick line renderer the whole time?
Like... it's shaped like the red, and the green is the start and the end?

livid agate Oct 13, 2022, 5:09 AM

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yes

spare mulch Oct 13, 2022, 5:09 AM

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Nobody has known that, the entire time.

livid agate Oct 13, 2022, 5:09 AM

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so i added theses yellow points thought people see now

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so then rotation do needs calculation based on whole linerenderer not just 2 points

spare mulch Oct 13, 2022, 5:16 AM

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The way the line renderer positions its end cap vertices when they're close together... I truly have no idea

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it tries very hard to maintain volume, and I have no idea what the algorithm it uses to do that is

livid agate Oct 13, 2022, 5:17 AM

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maybe first and last point as starting direction while points in between modifiers of it

spare mulch Oct 13, 2022, 5:18 AM

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it would sadly make the most sense to literally get its vertices with BakeMesh and get the end verts if you want to align to it.
But that function isn't cheap

livid agate Oct 13, 2022, 5:19 AM

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if that would even be compatibile with changing every 3 seconds

finite glade Oct 13, 2022, 5:19 AM

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spare mulch it would sadly make the most sense to literally get its vertices with BakeMesh a...

Could he calculate a reusable relative position from that?

spare mulch Oct 13, 2022, 5:20 AM

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It would need to be recalculated any time it changes because I have no idea where the end verts end up in squashed scenarios like these

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unless someone can intuit what drives the angle of the end cap here, getting the verts is the only way I know to position anything there.

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The other alternate is to write a shader that gets the end position and modifies the way the end cap is drawn

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as you can add end cap vertices, they're just not UV'd in a very useful way

livid agate Oct 13, 2022, 5:24 AM

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why not just apply angles same way its applied to linerenderer

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using middle point to adjust end circle

spare mulch Oct 13, 2022, 5:26 AM

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livid agate why not just apply angles same way its applied to linerenderer

and how is it applied to LineRenderer?

livid agate Oct 13, 2022, 5:26 AM

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it cannot directly because these separate objects

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but it need use all vectors that line uses

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calculating sizes of last two points and all points of line

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so right now its basically about changing direction variable all other code is correct?

livid agate Oct 14, 2022, 1:19 AM

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other idea

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could i like make 2 more line renderers and use current one just as position holder

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for each point go 0.5 meter in left and right and set there new points for two new linerenderers

livid agate Oct 14, 2022, 1:43 AM

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okay then how i make loop that gets from each linerenderer position 0.5 meter to the right and left?

indigo gale Oct 14, 2022, 1:43 AM

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livid agate could i like make 2 more line renderers and use current one just as position hol...

thats what people thought you were doing from the start

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thats probably the way to go.

livid agate Oct 14, 2022, 1:43 AM

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i werent doing that because file had no data about that

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id need make this data myself

indigo gale Oct 14, 2022, 1:43 AM

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although, you will experience some skewing at weird angles even with 2 linerenderers.

livid agate Oct 14, 2022, 1:44 AM

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but then i will have positions of both ends

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then they should be able used to get actual angle

indigo gale Oct 14, 2022, 1:44 AM

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it will be better than your current solution for sure. Try it

livid agate Oct 14, 2022, 1:50 AM

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soo how do i get each left and right point with added 0.5 meter distance

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since that rotation black magic again

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not sure if that cross works properly

livid agate Oct 14, 2022, 2:32 AM

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im trying move from vector in some direction by some distance

spare mulch Oct 14, 2022, 2:37 AM

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I'm not sure what you want from people at this point. If you want to get something perpendicular to something else, you need to use cross product.
You'd use the cross product between forward or back, and the direction the line segment is going.

livid agate Oct 14, 2022, 2:43 PM

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but now linerenderer has both sides cut in different angle

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its impossible to match up circle now

livid agate Oct 14, 2022, 3:01 PM

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but okay its not as visible as before

finite glade Oct 14, 2022, 4:59 PM

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@livid agate I don't think anyone is able to relate to this rare issue of yours.
LineRenderer is not a perfect tool. Either you are able to figure out a 99% proof way to compensate for its internal algorithms, or you need to look for a different approach. Ask yourself if perfection is necessary in this current project.

It might not be the right tool for the job, and depending on what you want to achieve, the path that leads to that goal might be difficult. Just don't be stuck on the same issue for a week. Spend your time on something constructive.

indigo gale Oct 14, 2022, 7:04 PM

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Why not just make the "semi-circle" a part of the line renderer?

indigo gale Oct 14, 2022, 10:21 PM

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I mean like, just draw the semi-circle with the line points? 🤔

#Line renderer alignment