About this sample

Five geometric primitives — a cube, a sphere, a cylinder, a torus and the Utah teapot — each built as a small, self-contained class you can lift straight into a project. Press a key and the sample cycles through them, through a set of colours, and between solid and wireframe drawing.

Every primitive class offers two constructors. The short one gives sensible defaults and a shape one unit across; the longer one lets you choose the size and, for everything except the cube, how many triangles to tessellate the surface into — the trade between a smooth silhouette and a cheap one.

Their real value is in debugging. A bounding sphere or a bounding box is far easier to judge when you can see it drawn as a translucent or wireframe model in the scene it belongs to, and these classes are the quickest way to put one there.

Controls

On the original Windows Phone build the same three actions were the top, bottom-left and bottom-right of the screen. In the browser, exiting ends the sample rather than closing the tab.