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WasmGPU | Documentation

colormap#sampleCPU

colormap#sampleCPU¶

Summary¶

colormap#sampleCPU samples the retained linear RGBA8 lookup table using the colormap's nearest or linear filter. The sampling helpers clamp the coordinate to the lookup-table endpoints. The method throws when canSampleCPU is false.

Syntax¶

Colormap.sampleCPU(t: number): Color4
const result = colormap.sampleCPU(t);

Parameters¶

Name	Type	Required	Description
`t`	`number`	Yes	Normalized sample coordinate, usually in `[0, 1]`.

Returns¶

Color4 - Linear RGBA channels normalized to [0, 1].

Type Details¶

Color4¶

type Color4 = [number, number, number, number];

Example¶

const canvas = document.querySelector("canvas");
const wgpu = await WasmGPU.create(canvas);

const colormap = wgpu.colormap.viridis();
const t = 0.5;
const result = colormap.sampleCPU(t);
console.log(result);

See Also¶