glPointSize equivalent in DirectX 11

Question

I'm rendering a starfield composed from points(D3D11_PRIMITIVE_TOPOLOGY_POINTLIST). If a point get closer to the camera I make it double the size. That worked well with OpenGL 1.x using glPointSize(2.0f) Is there a way to achieve this with DirectX 11 on Windows Phone 8? What I need is a way to make a rendered point appear bigger on some custom value.

Any thought is greatly appreciated.

Answer 1

There's no native sprite type in D3D11. Your best bet is to use instancing with a single quad VB and a per-instance point VB. You'd scale by dividing the quad point deltas by the view depth, or applying a standard perspective projection matrix (though the latter would also cause the points themselves to converge at higher distances).