Techniques and Passes

Techniques provide the rendering muscle. A technique encapsulates the effect state that determines a rendering style. A technique is made up of one or more passes.

Techniques

technique [ id ]  [< annotation(s) >] 
    { pass(es) };

• id - Optional unique identifier. See IDs and Semantics.
• annotation - Zero or more optional pieces of user-specific information. See Annotations.
• pass(es) - Zero or more passes. Each pass contains state assignments. See below.

Passes

A pass contains the state assignments required to render.

pass  [ id ]  [< annotation(s) >] 
    { state assignment(s) }

• id - Optional unique identifier. See IDs and Semantics.
• annotation - One or more optional piece of user-specific information. See Annotations.
• assignment(s) - Assign zero or more state values, or evaluate one or more expressions. See States and Expressions.

Passes ignore all but the last assignment in a set of repeated assignments to the same state.