128 lines
2.8 KiB
TypeScript
128 lines
2.8 KiB
TypeScript
import { v4 as uuid } from "uuid"
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import * as vec from "utils/vec"
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import { PolylineShape, ShapeType } from "types"
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import { createShape } from "./index"
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import { intersectPolylineBounds } from "utils/intersections"
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import { boundsCollide, boundsContained } from "utils/bounds"
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const polyline = createShape<PolylineShape>({
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boundsCache: new WeakMap([]),
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create(props) {
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return {
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id: uuid(),
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type: ShapeType.Polyline,
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isGenerated: false,
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name: "Polyline",
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parentId: "page0",
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childIndex: 0,
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point: [0, 0],
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points: [[0, 0]],
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rotation: 0,
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style: {},
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...props,
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}
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},
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render({ id, points }) {
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return <polyline id={id} points={points.toString()} />
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},
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getBounds(shape) {
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if (this.boundsCache.has(shape)) {
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return this.boundsCache.get(shape)
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}
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let minX = 0
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let minY = 0
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let maxX = 0
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let maxY = 0
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for (let [x, y] of shape.points) {
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minX = Math.min(x, minX)
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minY = Math.min(y, minY)
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maxX = Math.max(x, maxX)
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maxY = Math.max(y, maxY)
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}
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const bounds = {
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minX: minX + shape.point[0],
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minY: minY + shape.point[1],
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maxX: maxX + shape.point[0],
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maxY: maxY + shape.point[1],
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width: maxX - minX,
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height: maxY - minY,
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}
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this.boundsCache.set(shape, bounds)
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return bounds
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},
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hitTest(shape, point) {
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let pt = vec.sub(point, shape.point)
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let prev = shape.points[0]
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for (let i = 1; i < shape.points.length; i++) {
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let curr = shape.points[i]
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if (vec.distanceToLineSegment(prev, curr, pt) < 4) {
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return true
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}
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prev = curr
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}
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return false
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},
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hitTestBounds(this, shape, bounds) {
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const shapeBounds = this.getBounds(shape)
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return (
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boundsContained(shapeBounds, bounds) ||
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(boundsCollide(shapeBounds, bounds) &&
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intersectPolylineBounds(
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shape.points.map((point) => vec.add(point, shape.point)),
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bounds
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).length > 0)
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)
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},
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rotate(shape) {
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return shape
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},
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translate(shape, delta) {
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shape.point = vec.add(shape.point, delta)
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return shape
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},
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scale(shape, scale: number) {
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return shape
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},
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transform(
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shape,
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bounds,
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{ initialShape, initialShapeBounds, isFlippedX, isFlippedY }
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) {
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shape.points = shape.points.map((_, i) => {
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const [x, y] = initialShape.points[i]
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return [
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bounds.width *
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(isFlippedX
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? 1 - x / initialShapeBounds.width
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: x / initialShapeBounds.width),
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bounds.height *
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(isFlippedY
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? 1 - y / initialShapeBounds.height
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: y / initialShapeBounds.height),
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]
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})
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shape.point = [bounds.minX, bounds.minY]
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return shape
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},
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canTransform: true,
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})
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export default polyline
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