hello everyone,

I am trying to draw many objects that are place on a perspective projection view but that have to look the same size on the pc screen regardless the distance, something like text box on top of the head of a character showing what its talking, I thought on unproject the position to screen coordinate and then using a orthogonal projection and project the screen coordinate position back and draw the object, but I want faster way more efficient because I gonna be using this heavily and the application will run on a mobile device.

thank you.