   Basic 2D Geometry
  Hello.Iam not getting my collision response to work 100% in my FirstPersonShooter.So my last hope now is to start implement this in 2D where i visually can see what is hapening. A sphere as my player and lines as my walls and finally red dots (small spheres) as points of intersections and so on.Anyone have a sample or demo on how to use 2D in Direct3D?all help is appreciated.   
  I don't know of any samples, but I'm sure they exist - probably not in the 'pure' sense and rather just general 2D games that, by definition, have some 2D-in-3D code.However, one quick trick is to just use an orthogonal projection matrix and fix your 3D geometry on a single plane (e.g. set all models to have a Y=0 and only use the X/Z coordinates), then have the camera look immediately along the axis you removed (Y)... That allows you to do all your rendering in just the way you're used to (shaders, pipeline config, geometry etc..) without having to reimplement everything.hthJack   