Keep your player on the ground

public void CreatePlayer()
        {
            //find the physics resolver
            RigidCollisionManager rigidManager = TorqueObjectDatabase.Instance.FindObject<RigidCollisionManager>("RigidManager");

            TorqueObject objPlayer = new TorqueObject();
            objPlayer.Name = "PlayerObject";

            T3DSceneComponent componentScene = new T3DSceneComponent();
            componentScene.Position = new Vector3(1220, 990, 218);
            componentScene.SceneGroup = "PlayerObject";
            objPlayer.Components.AddComponent(componentScene);

            // put your own guy in the path
            T3DTSRenderComponent componentRender = new T3DTSRenderComponent();
            componentRender.ShapeName = @"datashapestorqueorc.dts";
            componentRender.SceneGroupName = "PlayerObject";
            objPlayer.Components.AddComponent(componentRender);
            
            //give the player some physics attributes, like gravity and collision
            T3DRigidComponent componentPhysics = new T3DRigidComponent();
            componentPhysics.SceneGroupName = "PlayerObject";
            componentPhysics.RenderCollisionBounds = false;
            componentPhysics.ResolveCollisions = true;

            // this seems to be the one part people miss, need a collision shape
            // I use two spheres, like the FPS demo

            CollisionSphereShape css1 = new CollisionSphereShape();
            css1.Radius = 0.65f;
            css1.Center = new Vector3(0f, -0.2f, 0.65f);
            componentPhysics.CollisionBody.AddCollisionShape(css1);
            CollisionSphereShape css2 = new CollisionSphereShape();
            css2.Radius = 0.65f;
            css2.Center = new Vector3(0f, 0f, 1.85f);
            componentPhysics.CollisionBody.AddCollisionShape(css2);
            componentPhysics.RotationScale = 0;
            componentPhysics.GravityScale = 25f;
            componentPhysics.Mass = 300;

            // really important need to attach to the rigid manager
            componentPhysics.RigidManager = rigidManager;

            // this keeps us from sinkin into the terrain
            // the object needs a rigid material. This is what apparently
            // gives it the attributes that keep it from sinking.

            RigidMaterial rm = new RigidMaterial();

            // OK someone who knows more can explain what Restitution etc are.
            // I guess Restitution is like softness or bounciness.
            // Kinetic friction is friction between moving surfaces, what it means to
            // this I do not know. Mess with it. If you change the KineticFriction 
            // on this and the terrain then maybe you can get hills too steep to climb.
            // StaticFriction is similar, however between non moving bodies. One again
            // your mileage may vary. If you look at the terrain ti also has a rigid material
            // between this and the terrain you can get some physics effects. If you turn down
            // the friction settings your dude will slide down hills.

            rm.Restitution = 0.5f;
            rm.KineticFriction = 0.5f;
            rm.StaticFriction = 0.5f;
            componentPhysics.RigidMaterial = rm;
            objPlayer.Components.AddComponent(componentPhysics);

            //add the animation component
            T3DAnimationComponent componentAnimation = new T3DAnimationComponent();
            componentAnimation.SceneGroupName = "PlayerObject";
            objPlayer.Components.AddComponent(componentAnimation);

            //add the player movement conmponent
            MovementComponent3D componentMovement = new MovementComponent3D();
            componentMovement.SceneGroupName = "PlayerObject";
            objPlayer.Components.AddComponent(componentMovement);

            //add a simple shadow component
            T3DBlobShadowCasterComponent componentShadow = new T3DBlobShadowCasterComponent();
            componentShadow.SceneGroupName = "PlayerObject";
            objPlayer.Components.AddComponent(componentShadow);

            TorqueObjectDatabase.Instance.Register(objPlayer);
        }