ddx

Description

Take the partial derivative of p with respect to x in screen space.

Signature

T ddx<T>(T p)
    where T : __BuiltinFloatingPointType;

vector<T, N> ddx<T, N:int>(vector<T, N> p)
    where T : __BuiltinFloatingPointType;

matrix<T, N, M> ddx<T, N:int, M:int>(matrix<T, N, M> p)
    where T : __BuiltinFloatingPointType;

Generic Parameters

T: __BuiltinFloatingPointType

N : int

M : int

Parameters

p : T

The value to take partial derivative for.

p : vector<T, N>

The value to take partial derivative for.

p : matrix<T, N, M>

The value to take partial derivative for.

Return value

The partial derivative of p.

Remarks

For SPIR-V, this function maps to OpDPdx.

Availability and Requirements

Defined for the following targets:

hlsl

Available in stages: amplification, fragment, compute, mesh, miss, callable, raygen, intersection, anyhit, closesthit.

glsl

Available in stages: amplification, fragment, compute, mesh, miss, callable, raygen, intersection, anyhit, closesthit.

cpp

Available in fragment stage only.

cuda

Available in fragment stage only.

metal

Available in fragment stage only.

wgsl

Available in fragment stage only.

spirv

Available in stages: amplification, fragment, compute, mesh, miss, callable, raygen, intersection, anyhit, closesthit.

Requires capabilities: SPV_NV_compute_shader_derivatives, spvMeshShadingEXT.