# Extract Generates a float stream from one channel of a color​N o​r vector​N ​stream. ## Parameter Types **Extract (color3f):** |Input |Type | |-------|-------------| |`In` |Color3| |`Index`|Int32 | |Output|Type | |------|-----| |`Out` |Float| **Extract (vector3h):** |Input |Type | |-------|--------| |`In` |Vector3h| |`Index`|Int32 | |Output|Type| |------|----| |`Out` |Half| **Extract (vector4f):** |Input |Type | |-------|--------| |`In` |Vector4f| |`Index`|Int32 | |Output|Type | |------|-----| |`Out` |Float| **Extract (vector2h):** |Input |Type | |-------|--------| |`In` |Vector2h| |`Index`|Int32 | |Output|Type| |------|----| |`Out` |Half| **Extract (vector2f):** |Input |Type | |-------|--------| |`In` |Vector2f| |`Index`|Int32 | |Output|Type | |------|-----| |`Out` |Float| **Extract (color4f):** |Input |Type | |-------|-------------| |`In` |Color4| |`Index`|Int32 | |Output|Type | |------|-----| |`Out` |Float| **Extract (vector3f):** |Input |Type | |-------|--------| |`In` |Vector3f| |`Index`|Int32 | |Output|Type | |------|-----| |`Out` |Float| **Extract (vector4h):** |Input |Type | |-------|--------| |`In` |Vector4h| |`Index`|Int32 | |Output|Type| |------|----| |`Out` |Half| ## Parameter descriptions - `In`: The input from which to extract a value. - `Index`: The index of the input from which to extract a value. Default value is `0`. ## Discussion The Extract node takes its `In` input and always outputs a singular `Float`. The value of the node’s output is the value of number in the `Index` position of `In`. For example, if `In` is equal to a `Vector3` of (10,15,20) and `Index` is `1`, the output is `15`. --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)