| 5.2. Effects for particular shapes | ||
|---|---|---|
 | Chapter 5. Extending the shaders with plugs |  |
There are various places where an Effect node may be used.
To apply an effect on a given shape, it can be placed
on the new Appearance.effects list:
Appearance MFNode [] effects [] # Effect
All the effects on this list (with suitable language) will be used.
This allows authors to define a library of independent shader effects
and then trivially pick desired effects for each particular shape.
Simply placing two effects on the Appearance.effects list
makes them cooperate correctly.
Note that all introduced nodes benefit from X3D mechanism to reuse the nodes
by reference (the DEF and USE keywords). Reusing the
Effect nodes
is most natural and allows to combine existing effects in any desired way.
Reusing the EffectPart nodes is also useful, when some effects
would like to share a particular piece of code. For example,
the same EffectPart node, with a library of useful
shading language functions, may be used for many effects.
| |  | |
| Chapter 5. Extending the shaders with plugs |  | 5.3. Effects for a group of nodes |