Popular Built-in VEX Attributes (Global Variables)
| General | ||
|---|---|---|
| type | name | description |
| int | @ptnum | Point Number |
| int | @numpt | Total number of points |
| float | @Time | Current time, in seconds |
| float | @TimeInc | Time increment per frame in seconds |
| float | @Frame | Current frame |
| int | @primnum | Primitive Number |
| int | @numprim | Total number of primitives |
| int | @vtxnum | Vertex number |
| int | @numvtx | Total number of vertices |
| Geometry | ||
|---|---|---|
| type | name | description |
| vec3 | @P | Point/Primitive Position |
| vec3 | @N | Point/Primitive/Vertex Normal |
| vec3 | @v | Velocity (ex: motion blur in particle systems) |
| float | @pscale | Uniform scale. Used in copy-SOP or particle systems |
| vec3 | @scale | Non-Uniform scale. For use see pscale |
| vec3 | @up | Up-Vector. Used together with @N to orient point/particle/instance |
| vec4 | @orient | Quaternion defining the rotation of a point/particle/instance |
| vec3 | @rot | Quaternion definig additional rotation |
| vec3 | @trans | Translation of instance |
| matrix | @transform | Transformation matrix (used for example in Copy-Sop) |
| vec3 | @pivot | Local pivot point for instance |
| float | @lod | Detail/Primitive level of detail |
| vec3 | @rest | Rest position |
| vec3 | @force | Force (acting on particle) |
| float | @age | Particle Age |
| float | @life | Max. Particle Life |
| Volumes | ||
|---|---|---|
| type | name | description |
| float | @density | Density of voxel |
| int | @ix, @iy, @iz | Voxel indices along each axis. Ranging from 0 to resolution -1 |
| vec3 | @center | Center of current Volume |
| vec3 | @orig | Bottom left corner of current Volume |
| vec3 | @size | Size of current Volume |
| vec3 | @dPdx | Change in position to get from one voxel to the next in x direction |
| vec3 | @dPdy | Change in position to get from one voxel to the next in y direction |
| vec3 | @dPdz | Change in position to get from one voxel to the next in z direction |
| vec3 | @BB | relative position inside bounding box. Ranging from {0,0,0} to {1,1,1} |
| Shading | ||
|---|---|---|
| Type | Name | Description |
| vec3 | @Cd | Diffuse Color |
| float | @Alpha | Alpha Transparency |
| vec3 | @uv | Point/Vertex/ UV coordinates |
| vec3 | @Cs | Specular Color |
| vec3 | @Cr | Reflective Color |
| vec3 | @Ct | Transmissive Color |
| vec3 | @Ce | Emissive Color |
| float | @rough | Roughness |
| float | @fresnel | Fresnel Coefficient |
| float | @shadow | Shadow intensity |
| float | @sbias | Shadow bias |
| type | name | description |
|---|---|---|
| vec3 | @P | Instance Position |
| float | @pscale | Uniform Scale |
| vec3 | @scale | Non Uniform Scale |
| vec3 | @N | Normal (+Z axis of the copy, if no orient) |
| vec3 | @up | Up-Vector. Used together with @N to orient instance (+Y axis of the copy, if no orient) |
| vec4 | @orient | Quaternion defining the rotation of a point/particle/instance |
| vec4 | @rot | Quaternion defining additional rotation (applied after @orient) |
| vec3 | @v | Velocity (motion blur, also used as +Z axis of the copy if no orient or N is present |
| vec3 | @trans | Translation of instance |
| matrix | @transform | Transformation matrix (used for example in Copy-SOP |
| vec3 | @pivot | Local pivot point for instance |