patterning.library.std — com.alchemyislands/patterning 0.7.4

arc clj/s

(arc radius start-angle offset)

(arc radius start-angle offset second-arg)

(arc radius start-angle offset resolution style)

(arc radius start-angle offset resolution style cx cy)

Creates an arc (fraction of a circle). radius: radius of the arc start-angle: starting angle in radians offset: angular span of the arc in radians (can be negative to go backwards) resolution: number of points in the arc (default: 30) style: optional style map (default: {:stroke (p-color 0) :stroke-weight 1}) cx: center X coordinate (default: 0) cy: center Y coordinate (default: 0)

Supports multiple arities: (arc radius start-angle offset) - uses default resolution (30) and default style (arc radius start-angle offset resolution) - explicit resolution, default style (arc radius start-angle offset resolution style) - all parameters (arc radius start-angle offset style) - if 4th arg is a map, it's style, resolution defaults to 30

bez-curve clj/s

(bez-curve points)

(bez-curve points style)

centered-rect clj/s

(centered-rect cx cy w h style)

clock clj/s

(clock time-map style)

clock-face clj/s

(clock-face style)

clock-hands clj/s

(clock-hands time-map)

cross clj/s

(cross color x y)

A cross, can only be made as a pattern (because sshapes are continuous lines) which is why we only define it now

diamond clj/s

drunk-line clj/s

(drunk-line steps stepsize & args)

drunk-line-internal clj/s

(drunk-line-internal steps stepsize random angle-range)

find-all-cycles clj/s

(find-all-cycles points step)

Find all distinct cycles when stepping through points by step size

find-cycle clj/s

(find-cycle point-vec step start-idx visited)

Find a single cycle starting from start-idx, returning [cycle-points new-visited]

h-sin clj/s

hex-side-center clj/s

(hex-side-center radius side-index)

Get the center point of a hexagon side. radius: distance from center to side center side-index: 0-5, where 0 is right side (angle 0), increasing counterclockwise

For a hexagon, side centers are evenly spaced at d60 (60°) intervals: side 0: angle 0 (right) side 1: angle d60 (top-right) side 2: angle (* 2 d60) (top-left) side 3: angle d180 (left) side 4: angle (* 4 d60) (bottom-left) side 5: angle (* 5 d60) (bottom-right)

horizontal-line clj/s

multiline clj/s

nangle clj/s

(nangle n rad)

(nangle n rad style)

(nangle n rad cx cy)

(nangle n rad cx cy style)

ogee clj/s

(ogee stretch)

(ogee stretch second-arg)

(ogee stretch resolution style)

An ogee shape. stretch: controls the stretch of the ogee curve resolution: step size for generating points (default: 0.1) style: optional style map (default: {:stroke (p-color 0) :stroke-weight 1})

Supports multiple arities: (ogee stretch) - uses default resolution (0.1) and default style (ogee stretch resolution) - if second arg is a number, it's resolution (ogee stretch style) - if second arg is a map, it's style (ogee stretch resolution style) - all parameters

on-background clj/s

(on-background color pattern)

pixel clj/s

(pixel n pixels palette)

Create an n x n pixel-art grid from a flat vector of numbers. 0 = empty, positive numbers map to palette entries.

Example: (pixel 2 [0 0 1 1] palette) The palette can be a map keyed by number, or a vector/sequence indexed by (value-1).

poly clj/s

(poly n radius)

(poly n radius style)

(poly n radius cx cy)

(poly n radius cx cy style)

quarter-ogee clj/s

random-rect clj/s

(random-rect style & {:keys [random] :or {random default-random}})

rect clj/s

spiral clj/s

(spiral nopoints dr-per-cycle num-cycles)

(spiral nopoints dr-per-cycle num-cycles style)

(spiral nopoints dr-per-cycle num-cycles r a)

(spiral nopoints dr-per-cycle num-cycles r a style)

Creates a spiral shape. nopoints: number of points per full cycle (like poly, nangle, star) dr-per-cycle: how much the radius increases over one full cycle num-cycles: number of full cycles to draw

The parameters are independent:

• Resolution: nopoints controls how smooth the spiral is
• Tightness: dr-per-cycle controls how tightly the spiral coils (independent of resolution)
• Length: num-cycles controls how many full rotations (independent of resolution)

Supports multiple arities: (spiral nopoints dr-per-cycle num-cycles) - starts at r=0, a=0, default style (spiral nopoints dr-per-cycle num-cycles style) - starts at r=0, a=0 (spiral nopoints dr-per-cycle num-cycles r a) - explicit start position, default style (spiral nopoints dr-per-cycle num-cycles r a style) - all parameters

spiral-points clj/s

(spiral-points r a dr da)

square clj/s

star clj/s

(star n rads)

(star n rads style)

(star n rads cx cy)

(star n rads cx cy style)

truchet clj/s

vertical-line clj/s