Look at specific point of a collider

Hello

I have a 3d character and a curve edge something like this image:


Now I want to check every point is in front of the player and change rotation of player according to this point. And also then move right and left.
I've used rayCast for doing it but I couldn't do it nice.
What's the best way for doing it?

 

There's various ways of doing it - is your curved edge quite thick or just a 2d curve?

If you raycast against a surface you get a RaycastHit object back, that contains the normal of the surface you've hit. You can use that normal to rotate the player so it faces the same direction as the curve part you just hit.

To make it smoother you could raycast where each of the players arms are in your diagram to get 2 hit points - if you create a normal from those it'll be less jerky.

 

It's 3D curve edge. Thanks for your answer what about moving?

 

You can cross the hit normal with your viewing direction to get a sideways vector to use for moving.

 

yeah, was just going to say that - here's an example: http://answers.unity3d.com/questions/722531/getting-perpendicular-direction-vector-from-surfac.html

 

It doesn't work nice yet. Here is an image of what I did.
1 - ray forward to the edge
2- use normal to rotate player
3- use the method dot to calculate direction
4- set direction

my problem is that player move in direction and after a while the ray doesn't work and fall!

 

When you hit the wall with the raycast you also need to move the player so it's not intersecting with it. For instance, if the distance between the player and the hit point is (for example) less than 0.2 metres you need to move the player so it's at least 0.2m away from the wall. The kind of thing you want to do might be easier to do with the built in Unity physics? You could set a capsule collider around the player and have a mesh collider on your curved wall - Unity will take care of making sure the player doesn't go through the wall etc...

Also, when you do a raycast it's probably worth starting it a little bit behind the player in case the player is already intersecting. For example, move the start position by the players negative forward vector multiplied by 0.2m