Quad Geometry

The humble quad. A rectangle composed of two triangles. A building block for many effects.

Textured Quad

To create effects quads will be shaded, textured and animated. This is a quad with a texture applied from a sprite sheet. The uv values change to select the desired portion of the image and create the illusion of an animated character.

To UV coordinates of the current frame are displayed in the corners of the Quad

Textured Quad

There are many software packages that can simulate complex animations and generate a corresponding sprite sheet.

The current frame is highlighted in the sprite sheet as the explosion animation plays.