independent to the direction. so even if the entity is pointing upwards or downward 90 degree, looking right or left should be possible. now its not:
 Code:
		xs *= 0.9;
		xs += (key_w-key_s)*speed*time_step;
		ps *= 0.9;
		ts *= 0.9;
		rs *= 0.9;
		ps -= (mouse_force.x)*speed*time_step;
		ts += (mouse_force.y)*speed*time_step;
		rs += (key_d-key_a)*time_step;
		c_rotate(me,vector(ps,ts,rs),GLIDE|IGNORE_YOU|IGNORE_PASSABLE|IGNORE_SPRITES);
		c_move(me,vector(xs*time_step,ys*time_step,zs*time_step),nullvector,GLIDE|IGNORE_PASSABLE|IGNORE_SPRITES);
		vec_set(camera.x,my.x);
		vec_set(camera.pan,my.pan);


this code results in uncontrolled fast rotations if you look up (or down) wards and try to look left or right.

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