Nodes
Expression
Expression — per-channel pixel expressions.
| Node | Expression |
|---|---|
| Type id | OC_N_expression |
| Menu | Color › Expression |
| Nuke class | Expression |
| Code | opencomp_core/nodes/color/expression.py |
Inputs and outputs
| Port | Name | Type |
|---|---|---|
| input 0 | Image | image |
| input 1 | mask | image |
| output 0 | Image | image |
Knobs
Panel tab Expression, in panel order.
| Knob | Label | Type | Default | Range / values | Nuke knob | Description |
|---|---|---|---|---|---|---|
temp_name0 | temp_name0 | text | temp_name0 | |||
temp_expr0 | temp_expr0 | text | temp_expr0 | |||
temp_name1 | temp_name1 | text | temp_name1 | |||
temp_expr1 | temp_expr1 | text | temp_expr1 | |||
temp_name2 | temp_name2 | text | temp_name2 | |||
temp_expr2 | temp_expr2 | text | temp_expr2 | |||
temp_name3 | temp_name3 | text | temp_name3 | |||
temp_expr3 | temp_expr3 | text | temp_expr3 | |||
channel0 | channel0 | text | rgba.red | channel0 | ||
expr0 | = expr0 | text | expr0 | |||
channel1 | channel1 | text | rgba.green | channel1 | ||
expr1 | = expr1 | text | expr1 | |||
channel2 | channel2 | text | rgba.blue | channel2 | ||
expr2 | = expr2 | text | expr2 | |||
channel3 | channel3 | text | rgba.alpha | channel3 | ||
expr3 | = expr3 | text | expr3 | |||
mask_channel | mask | menu | none | none, rgba.alpha, rgba.red, rgba.green, rgba.blue | Mask channel, e.g. rgba.alpha (none = no mask) | |
inject | inject | bool | false | Copy the mask into mask.a for nodes downstream | ||
invert_mask | invert | bool | false | invert_mask | ||
fringe | fringe | bool | false | Only apply the effect at the edges of the mask | ||
unpremult | (un)premult by | menu | none | none, rgba.alpha | ||
invert_unpremult | invert | bool | false | (Un)premultiply by 1 - alpha | ||
mix | mix | float | 1 | 0 to 1 | mix |
Other knobs (Python, .nk and the assistant; not on the panel)
| Knob | Label | Type | Default | Range / values | Nuke knob | Description |
|---|---|---|---|---|---|---|
gl_color | Viewer Controls Color | float ×3 | 0, 0, 0 | 0 to 1 | ||
postage_stamp_frame | Static Frame | int | 1 | -2147483648 to 2147483647 | ||
lifetimeStart | Lifetime Start | int | 0 | -2147483648 to 2147483647 | ||
lifetimeEnd | Lifetime End | int | 100 | -2147483648 to 2147483647 | ||
useLifetime | Use Lifetime | boolean | false | |||
cached | Cached | boolean | false | |||
bookmark | Bookmark | boolean | false | |||
dope_sheet | Dope Sheet | boolean | false | |||
clone_group | Clone Group | string | ||||
link_source | Link Source | string | ||||
link_overrides | Link Overrides | string | ||||
split_views | Split Views | string | ||||
channels | Channels | string | rgba | Layer the op applies to: rgb, rgba, alpha, all, none, <layer> or <layer>.<ch> |
Nuke equivalent
Imports from and exports to Nuke's Expression. The standard Nuke mask knobs (channels, mask, invert, (un)premult, mix) are mapped too.
Nuke knobs not in this list import as a knob of the same name, or are kept unchanged for export. See .nk import.