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Add a feature to export Sandbox as a video
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,138 @@ | ||
| import {mat2d, scalar, vec2} from 'linearly' | ||
| import {type Path} from 'pave' | ||
| import saferEval from 'safer-eval' | ||
| import {Ref} from 'vue' | ||
|
|
||
| export async function setupEvalContextCreator(brandColor: Ref<string>) { | ||
| const {Path, Arc, CubicBezier, Curve} = await import('pave') | ||
|
|
||
| return (ctx: CanvasRenderingContext2D) => { | ||
| const stroke = (path: Path, color = '', lineWidth = 1) => { | ||
| ctx.fillStyle = 'none' | ||
| ctx.strokeStyle = color || brandColor.value | ||
| ctx.lineCap = 'round' | ||
| ctx.lineWidth = lineWidth | ||
| Path.drawToCanvas(path, ctx) | ||
| ctx.stroke() | ||
| } | ||
|
|
||
| const fill = (path: Path, color = '') => { | ||
| ctx.strokeStyle = 'none' | ||
| ctx.fillStyle = color || brandColor.value | ||
| Path.drawToCanvas(path, ctx) | ||
| ctx.fill() | ||
| } | ||
|
|
||
| const dot = (point: vec2, color = '', size = 3) => { | ||
| ctx.strokeStyle = 'none' | ||
| ctx.fillStyle = color || brandColor.value | ||
| Path.drawToCanvas(Path.circle(point, size / 2), ctx) | ||
| ctx.fill() | ||
| } | ||
|
|
||
| const debug = (path: Path, color = '') => { | ||
| const lineWidth = 0.5 | ||
| const vertexSize = 3 | ||
|
|
||
| ctx.fillStyle = color || brandColor.value | ||
|
|
||
| ctx.strokeStyle = color || brandColor.value | ||
| ctx.lineCap = 'round' | ||
| ctx.lineWidth = lineWidth | ||
|
|
||
| for (const curve of path.curves) { | ||
| let isFirstVertex = true | ||
| for (const {start, point, command, args} of Curve.segments(curve)) { | ||
| ctx.lineWidth = lineWidth | ||
|
|
||
| // Draw the first vertex | ||
| if (isFirstVertex) { | ||
| Path.drawToCanvas(Path.circle(start, vertexSize), ctx) | ||
| ctx.stroke() | ||
| isFirstVertex = false | ||
| } | ||
|
|
||
| if (command === 'L') { | ||
| Path.drawToCanvas(Path.line(start, point), ctx) | ||
| } else if (command === 'C') { | ||
| const [control1, control2] = args | ||
|
|
||
| // Draw handles | ||
| ctx.setLineDash([2, 1]) | ||
| Path.drawToCanvas(Path.line(start, control1), ctx) | ||
| ctx.stroke() | ||
| Path.drawToCanvas(Path.line(point, control2), ctx) | ||
| ctx.stroke() | ||
| ctx.setLineDash([]) | ||
|
|
||
| Path.drawToCanvas(Path.circle(control1, 1), ctx) | ||
| ctx.fill() | ||
| Path.drawToCanvas(Path.circle(control2, 1), ctx) | ||
| ctx.fill() | ||
|
|
||
| const bezier = Path.cubicBezier(start, control1, control2, point) | ||
| Path.drawToCanvas(bezier, ctx) | ||
| } else if (command === 'A') { | ||
| let arc = Path.moveTo(Path.empty, start) | ||
| arc = Path.arcTo(arc, ...args, point) | ||
| Path.drawToCanvas(arc, ctx) | ||
| } | ||
| ctx.lineWidth = lineWidth | ||
| ctx.stroke() | ||
|
|
||
| ctx.lineWidth = vertexSize | ||
| Path.drawToCanvas(Path.dot(point), ctx) | ||
| ctx.stroke() | ||
|
|
||
| ctx.font = '7px "IBM Plex Mono"' | ||
| ctx.fillText(command[0], ...vec2.add(point, [2, -2])) | ||
| } | ||
| } | ||
| } | ||
|
|
||
| return { | ||
| Path, | ||
| Arc, | ||
| CubicBezier, | ||
| scalar, | ||
| vec2, | ||
| mat2d, | ||
| stroke, | ||
| fill, | ||
| dot, | ||
| debug, | ||
| } | ||
| } | ||
| } | ||
|
|
||
| export function createDrawFunction( | ||
| canvasContext: CanvasRenderingContext2D, | ||
| evalContext: Record<string, unknown>, | ||
| code: string | ||
| ) { | ||
| const dpi = window.devicePixelRatio | ||
| const canvas = canvasContext.canvas | ||
| const {width, height} = canvas.getBoundingClientRect() | ||
| canvas.width = width * dpi | ||
| canvas.height = height * dpi | ||
| const scale = (width * dpi) / 100 | ||
|
|
||
| try { | ||
| const draw = saferEval( | ||
| `(time) => {\n${code}\n}`, | ||
| evalContext | ||
| ) as unknown as (time: number) => void | ||
|
|
||
| return (time: number) => { | ||
| canvasContext.clearRect(0, 0, canvas.width, canvas.height) | ||
| canvasContext.resetTransform() | ||
| canvasContext.transform(...mat2d.fromScaling([scale, scale])) | ||
| draw(time) | ||
| } | ||
| } catch (e) { | ||
| // eslint-disable-next-line no-console | ||
| console.error(e) | ||
| return null | ||
| e | ||
| } | ||
| } |
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