Stroke

Description

The stroke() function sets the stroke (outline) color for shapes. It can accept either a SIMD4 color value or individual RGB(A) components.

Syntax

// Using a SIMD4 color value
stroke(color: SIMD4<Float>)

// Using RGB components
stroke(r: Float, g: Float, b: Float, a: Float = 255)

// Using positional RGB components
stroke(r, g, b, a)

// Using grayscale value
stroke(gray: Float, a: Float = 255)

Parameters

color

A SIMD4 color value (optional)

r

Red component (0-255)

g

Green component (0-255)

b

Blue component (0-255)

a

Alpha component (0-255, defaults to 255)

gray

Grayscale value (0-255)

Example

// Set stroke color using a SIMD4 color
stroke(color(255, 0, 0))

// Set stroke color using RGB components
stroke(255, 0, 0)  // Red
stroke(r: 0, g: 255, b: 0)  // Green

// Set semi-transparent stroke
stroke(255, 0, 0, 128)  // Semi-transparent red

// Set grayscale stroke
stroke(128)  // Medium gray
stroke(255, 128)  // Semi-transparent white

Notes

  • The stroke color affects all subsequent shape drawing operations
  • Input values are in the range 0-255 but are automatically converted to 0-1
  • The alpha component defaults to 255 (fully opaque) if not specified
  • Using a single value creates a grayscale color
  • The stroke width is set to 3 by default