C++ - Check if camera is touching the terrain (Collision)

[LunaRebirth]

So I've been looking up numerous differently worded sentences to find the answer to this topic, and I just can't seem to find anything.

Long story short, I want to find if the camera is on the terrain. I'm using the collision tutorial code.

Trying to make a jump where the camera goes up a distance before falling down, but you can only jump if something is directly underneath of you.

To answer any questions, I did do a setPosition for the camera, but I'm doing this for an uneven terrain, so if you were on top of a hill, you could jump then wait until you stop going up to jump again (like you're flying).

Any help is appreciated. Thanks in advance.

-Luna

[thanhle]

I don't use the terrain scenenode yet. But I think you can get the height by feed it X, Z position.

For camera affect under gravity using simple motion law ignoring air friction.

V^2 = U^2 + 2a(Ds)
V = u + at
S = So + ut + 1/2at^2

Just apply the formula to find Y direction at anytime when jump, then compare with the terrain Y position to prevent go through. Assume jump velocity u is known.

Regards
Thanh

[LunaRebirth]

I don't understand your method.
I can find your current position at jump, then increase the Y to a certain Y above where you jumped. However, if you happen to be jumping and reach that max, I have no way of detecting if you've hit the ground or not. So you can jump again.

If I make the jump delay so they can't jump after so long, of you jump off a mountain you'll be able to jump in air again.

I need some way to find true or false if you are on the ground or not.

[Seven]

If using a terrain scene ode there is a getheight(x,a) function you can check against your character pos.y

[LunaRebirth]

Thank you, I'll look into it. Does this method go for the overall height? Or the height of the vertex below your camera??