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There are slopes in my map that my character can't climb. I spherecast the ground below the players feet and check the normal's returned to see if he is standing on one of these slopes.
If the player is in fact standing on a slope then he is positioned in the last place where he was not.
The problem is when he is at the top of the slope he can't slide down. I need to tell the player when he is at the bottom of a slope or above one. I'm thinking an angle of the ground where there was last no slope VS. the angle of the slope.
Any idea's?

[edit] Im bring up this old topic see my latest reply for the question.

You're using Sparky's DLL, so there's no need to simply place the player at the last safe place. That's not very natural.

Try this:
If the player is not on a slope, stick him to the floor, right below him. If the player is on a slope, cause him to slide down the slope, changing all three coordinates of his position. That way, if he's at the top of a slope, he'll slide down it, and when he's at the bottom, he'll always slide back when he tries to climb it.

To check if he's on a slope position an invisible cube on the slope and check collision with that.

Someone told me of this tecnique of pointing an object to match the suface's angle.

First you get the surfaces normals then us point object like this..
dbPointObject(Obj,normalX+dbObjectPositionX(CHAR),normalY+dbObjectPositionY(CHAR),normalZ+dbObjectPositionZ(CHAR));

After doing this I use dbTurnObjectLeft(4,???); to point the object in the correct direction. The problem is I don't know the correct value to turn it.

Ive tryed stuff like:

1)???=Direction to move

2)???=DirectionToMove-ObjectAngleY(CHAR)

3)???= A variable that I got from taking two sets of position's finding the angle from the players position, then subtracting them. lol

The end result I want is the player moving on the ground object's planes with the correct angles ( for smoothness )