Virtual Cameras

Rasterizing a 3D scene: From world space to screen space

pinhole camera

Perspective projection

Perspective divide

Field of View

Cubes become smaller, edges of screen “stretch”

• In a physical pinhole camera, the focal length determines the field of view
• The closer the film screen is to the pinhole, the more world it can see
• Since you’re fitting more of the world onto the same sized screen as before, everything previously visible looks a little smaller

Camera Transformations