List of Attributes

These are the attributes which are currently reserved for TouchDesigner use. The list may change with no notification or fear of consequence by users who have defined their own attributes. This is a suggested list, not a definitive list.

Order of Attribute Precedence

The order of precedence for attributes from highest to lowest is:

• Vertex Attributes
• Point Attributes
• Primitive Attributes
• Detail Attributes

Attributes with a higher order of precedence override similar attributes with a lower order of precedence.

Material and Physical Attributes

Location can be:

d	Detail Attribute
pr	Primitive Attributes
pt	Point Attributes
v	Vertex Attributes

Material Group
Name	Type	Size	Location	Description
mat	index	1	d, pr	Material name specification
Cd	float	4	d, pr, pt, v	Diffuse color and alpha (override)

Physical Group
Name	Type	Size	Location	Description
N	vector	3	pr, pt	Surface normal
v	vector	3	pt	Velocity
uv	float	3	pt, v	Texture Coordinates (UVW)
lod	float	1	d, pr	Level of Detail
dir	vector	3	pr	Vector for attractor force
fedge	float	1	pr	Edge force for attractor
fvortex	float	1	pr	Vortex force for attractor
fspiral	float	1	pr	Spiral force for attractor
mass	float	1	pt	Mass
drag	float	1	pt	Coefficient of drag
life	float	2	pt	Life time (index 0 = time alive, index 1 = death time)
id	float	1	pt	Identifying tag
rest	float	3	pt	Rest position

Where Attributes Can be Set

Following, is a list of where attributes can be adjusted or set:

Attribute Type	SOP to Create	SOP Where it’s Used
Point	Point
Point Cd	Point
Primitive Cd	Point
Point N	Facet, Point	Point
Point v	Facet	Particle, Spring
Point uv	Texture, Point
Primitive dir	Attractor	Particle, Spring
Primitive fedge	Attractor	Particle, Spring
Primitive fvortex	Attractor	Particle, Spring
Primitive fspiral	Attractor	Particle, Spring
Point mass	Point	Particle, Spring
Point drag	Point	Particle, Spring
Point life	Particle, Spring	Particle, Spring, Point
Point id	Particle, Spring