[Thomas]

Hello!

I want to create a non-linear world by using PolygonColliders. in the end it should be something like a cave.

But how can i make the borders of the collider visible? is there a way? or to fill them with a color?

 

Cheers,

TS

[ChristianFelgo Team]

Hi,

if you are a Pro subscriber, you could use the (yet undocumented) PolygonItem for that, which is available since version 1.1. You will find examples for it in the Felgo SDK directory and then in Examples/FelgoSDK/VPlayTests/basicTests/PolygonItemTest.qml and  Examples/FelgoSDK/VPlayTests/basicTests/SimplePolygon.qml.

Cheers, Chris

[Thomas]

okay, thanks for the advice!

is it somehow possible to visually “draw” some points of the PolygonItem? Or is it only possible by calculations and guesstimates?

 

Cheers,

TS

[ChristianFelgo Team]

What do you mean with some points of a PolygonItem? What it does, is drawing a polygon around its vertices. For debugging, you can also enable the QML renderer and have a look at the physics debug shapes there. To enable the QML renderer, go to main.cpp and comment the line

vplayApplication.setQmlRendererEnabled(false);

Cheers, Chris

 

[Thomas]

OK, i just wanted to know, if it is possible to draw the polygon in the designer, so i can see, where my polygon is and what it looks like in the level.

my polygon should be a wall, and the object should not collide with the wall.

[ChristianFelgo Team]

Hi, what do you mean with the “designer”? Do you really need a polygon for the wall, isnt a BoxCollider sufficent?

Cheers, Chris

[Thomas]

i want to create a cave, where the object flies through.. so for the level borders, a BoxCollider is sufficient enough, but to create a way from start to finish, it looks kinda strange with so many BoxColliders.

And designing a Cave with a visual designer would be much easier than either putting BoxColliders one to another or to guess the points of a Polygon..

 

Cheers

TS

[ChristianFelgo Team]

Ah now I get what you meant 😉

There is an awesome tool called Physics Editor which you could use to generate vertices from an image. You could then export the file and inser the vertices into the PolygonCollider.

Cheers, Chris

[Thomas]

hey!

thanks, thats a really practical tool.

all i want to know now is, which exporter is best-suited for a PolygonCollider? i tried with Plain Text, Box2D pList and Box2D XML. But each of them creates multiple arrays, allthough i only created one.. though its a big one.

 

Cheers,

TS

[ChristianFelgo Team]

If you get multiple arrays, you probably created a concave polygon, which are not supported by Felgo yet?

Can you make up your world of multiple convex polygons?

Cheers, Chris

[Thomas]

yes, i just included all the polygons in my level and it somehow works nearly correct. some little issues with rounding errors, i guess, but thats no problem.

Thx for the advice of using this tool, it really helped me a lot.

 

Cheers,

TS