PERSONAL TASK: Run time continues junction barrier

[kianzarrin]

This asset already provides continues junction barrier. https://steamcommunity.com/sharedfiles/filedetails/?id=1319965985&searchtext=continues+junction+median

But I think it is better to be able to create junction barriers on demand while playing the game. This approach has several advantages:

• The user is not required to have 2 versions of each asset.
• almost all custom assets and most vanilla roads do not have continues junction barrier.

The road mentioned above achieves continues junction barrier by providing an extra node texture that pretends to be a monorail connect group. This node has the same texture as the segments but the pavements have been removed. If we have access to _p.png we should easily be able to remove pavements from textures before rendering it.

~~Future plans:

• should I integrate it with network skins or should it be part of a new mod called junction manager or something?~~

Related/TODO:

• [x] Hide unconnected tracks
• [ ] increasing corner offset decreases max turn angel (https://github.com/kianzarrin/myrepo/issues/2#issuecomment-623572343)
• [x] force direct connect when cars do not criss cross.
• [x] create direct connect texture.

[originalfoo]

Another thing to look at is the wire fence in the interactive prisons asset pack:

See how it creates some mesh over top of road at junctions, which is something I've never seen any other network do. I assume it's just a road asset, and maybe something in the segment extends a prop out over the node or something?

[originalfoo]

Also, remember that if you start putting medians across junctions, the pathfinder needs to know. So again, it strikes me as something that should be in TM:PE because we can set up lane arrows/connectors automatically.

It would be cool also to be able to create fake junctions in roads with medians, to create places where traffic can do u-turns prior to reaching an actual proper junction.

And with fake junctions in roads, we are only a few inches away from having functionality like in the Crossings mod - eg. being able to give those fake junctions pedestrian crossings. The issue with Crossings mod is that you can't toggle the junction on and off (if memory serves) - so if you add a junction and later want to remove it, you have to replace the road which is somewhat annoying. Would be nice if there was just some way to toggle a crossing at any node on a road.

[kianzarrin]

@aubergine10 And with fake junctions in roads, we are only a few inches away from having functionality like in the Crossings mod - eg. being able to give those fake junctions pedestrian crossings. The issue with Crossings mod is that you can't toggle the junction on and off (if memory serves) - so if you add a junction and later want to remove it, you have to replace the road which is somewhat annoying. Would be nice if there was just some way to toggle a crossing at any node on a road.

You can remove the crossing nodes added by the crossing mod. but not other nodes.

[kianzarrin]

Direct connect node does not have any shader keywords. but normal node has shader keyword NET_NODE and normal segment has shader keyword NET_SEGMENT

info about 4 lanes road with continues junction median

Direct connect node -> m_nodeMaterial.DeffuseTexture

m_segments[0].m_segmentMaterial.DeffuseTexture

The mesh for segment node and direct connect node:

[kianzarrin]

I was hoping that increasing corner offset would help those tracks to connect.

VictoriaCity: Track connection is done using direct connect nodes And whether they will be generated depends mainly on the maximum turning angle radius of curvature would be corner_offset * tan(turning_angle/2)

Max turn angle is the angle between m_start/endDirection of two connecting segment. so the smaller the angle, the sharper the turn. More info on max turn angle here: related https://github.com/CitiesSkylinesMods/TMPE/issues/649.

this issue calculates the radius of curved.

I don't know where VitoriaCity's got his formula radius of curvature = corner_offset * tan(turning_angle/2) but it seems right.

In practice its going to be much more complicated than that. calculating offset is hard. so for starters I assume half width = offset

max_turn_angle = Min(max_turn_angle1, max_turn_angle2)
offset0 =  hw * sin(max_turn_angle)
Rmin = offset0*tan(max_turn_angle/2)

offset_normal =  Max(hw1,hw2) * sin(current_angle)
offset = Max(offset_normal, offsetIn); // offsetIn is set in Node controller panel.
R = offset*tan(current_angle/2)

if R>Rmin then connect tracks.

[victoriacity]

Here's a figure showing how radius of curvature is calculated, I also realized that it should be corner_offset / tan(turning_angle/2) instead of multiply.

Which should make sense with a sanity check: With turning angle=0 the radius will be infinity; l / tan(0) = l/0 = inf With turning angle=180 the radius will be zero. l / tan(90) = l/inf = 0

[kianzarrin]

CS code to use max turn angle:

float num8 = vector2.x * vector3.x + vector2.z * vector3.z;
float num9 = 0.01f - Mathf.Min(info2.m_maxTurnAngleCos, info3.m_maxTurnAngleCos);
if (num8 < num9) ...

[kianzarrin]

progress!

[kianzarrin]

I created this mesh dynamically(in game):

[kianzarrin]

but for some reason I get this: @victoriacity do you know what node/material/mesh properties I need to set for direct connect nodes?

[kianzarrin]

I am comparing my auto-generated mesh(right) with mesh from the workshop road with a continuous junction barrier(left). I do not understand why the latter has a black box inside the display window and mine does not.

[kianzarrin]

I removed NET_NODE from material keywords and I get this: why my road is flickering and the one from workshop does not?

[kianzarrin]

I can see from blender that the workshop road uses a mesh that is tiny little bit higher than -0.3m.

[kianzarrin]

I got it working by elevating my mesh but I still don't understand why I don't get the black box https://github.com/kianzarrin/DirectConnectRoads/issues/1#issuecomment-653861195 Is it because I do not clean up unused vertices? does it have something to do with Mesh.bounding?