Sliding down the slope

Question

I've just gotten a triangle collision object in using the Separate Axis Theorem, the triangle has a 45 degree slope and resloves collision detection via the projection method. The actual collision detection works fine, but I'm having an issue where the character keeps slipping down the slope when he runs up or goes down it.

These are the number for the characters movement. I know I should be doing something with either the part of the Y velocity or somehow changing the x velocity but not sure what.

The number for the velocity

private float accerlation = 0.25f;
 velocity.X = velocity.X - accerlation 

private float superaccerlation = 0.3f;
velocity.X = velocity.X - superaccerlation

How the collision is being resolved.

if (collision == TileCollision.LeftSlope)
{
    Vector2 triDepth = RectangleExtensions.GetIntersectionDepthTriLeft(bounds, tileBounds);

    if (triDepth.X != 0 && triDepth.Y != 0)
    {
        isOnSlope = true;
        Position = new Vector2(Position.X + triDepth.X, Position.Y + triDepth.Y);
    }
    else if (triDepth.X != 0 && triDepth.Y == 0)
        Position = new Vector2(Position.X + triDepth.X, Position.Y);
    else if (triDepth.X == 0 && triDepth.Y != 0)
    {
        headOnRoof = true;
        Position = new Vector2(Position.X, Position.Y + triDepth.Y);
    }

    bounds = BoundingRectangle;

}

Answer 1

I'm assuming that this is a platformer game and that your character collision shape is a rectangle.

You didn't give enough information for me to definitively say what the problem is, but I can guess. Your character will look like he's sliding down the slope if you are applying gravity every frame and always project out the shortest intersection distance. Instead, you want to always move him up on the y axis.

I drew a diagram that can explain my thoughts better than words: