`dpdy()`

Function in Builtins

dpdy(x): the screen-space partial derivative of x along the Y axis, component-wise; the partner of dpdx, with the same GPU-only and fragment-only constraints.

import { dpdy } from 'typeshade'

The signature, the description and the examples come from the compiler's own source at commit 26de7be8.

Syntax

const dpdy: <K extends FloatKey>(x: ReadonlyNode<K>) => Node<K>

Parameters

x ReadonlyNode<K>

Return value

Node<K>

Description

Spelled dpdy on WGSL and dFdy on GLSL ES 3.00.

Examples

Example

import { fn, dpdy, f32T } from 'typeshade'

const dv = fn('dv', { v: f32T }, ({ v }) => dpdy(v))

Targets

Target	Support	Notes
WGSL (WebGPU)	Supported	`dpdy(x)`.
GLSL ES 3.00 (WebGL2)	Supported	`dFdy(x)`.
CPU oracle	Stub	The oracle has no texture memory and no neighbouring fragments. The call throws unless the module was compiled with `{ gpuStubs: true }`, which returns a placeholder.

In the guide

Source

src/core/ir/node.ts, line 2257, at commit 26de7be8

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dpdy()