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Make pointOnCurve behaviour match documentation

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This commit is contained in:
Jonathan Haas 2024-04-15 18:26:48 +02:00
parent 452d0c540d
commit 1909955d73
2 changed files with 27 additions and 6 deletions
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9
packages/core/src/path.mjs
View file

@ -7,6 +7,7 @@ import {
curvesIntersect,
pointOnLine,
pointOnCurve,
relativeOffsetOnCurve,
curveEdge,
round,
__addNonEnumProp,
@ -902,7 +903,13 @@ Path.prototype.split = function (point) {
break
}
} else if (path.ops[1].type === 'curve') {
let t = pointOnCurve(path.ops[0].to, path.ops[1].cp1, path.ops[1].cp2, path.ops[1].to, point)
let t = relativeOffsetOnCurve(
path.ops[0].to,
path.ops[1].cp1,
path.ops[1].cp2,
path.ops[1].to,
point
)
if (t !== false) {
let curve = new Bezier(
{ x: path.ops[0].to.x, y: path.ops[0].to.y },

24
packages/core/src/utils.mjs
View file

@ -541,16 +541,30 @@ export function pointOnBeam(from, to, check, precision = 1e6) {
/**
* Finds out whether a Point lies on a (cubic) Bezier curve
*
* @param {Point} from - Start of the curve
* @param {Point} start - Start of the curve
* @param {Point} cp1 - Control point at the start of the curve
* @param {Point} cp1 - Control point at the end of the curve
* @param {Point} cp2 - Control point at the end of the curve
* @param {Point} end - End of the curve
* @param {Point} check - Point to check
* @return {bool} result - True of the Point is on the curve, false when not
* @return {boolean} result - True of the Point is on the curve, false when not
*/
export function pointOnCurve(start, cp1, cp2, end, check) {
if (start.sitsOn(check)) return true
if (end.sitsOn(check)) return true
return relativeOffsetOnCurve(start, cp1, cp2, end, check) !== false
}
/**
* Finds where a Point lies on a (cubic) Bezier curve
*
* @param {Point} start - Start of the curve
* @param {Point} cp1 - Control point at the start of the curve
* @param {Point} cp2 - Control point at the end of the curve
* @param {Point} end - End of the curve
* @param {Point} check - Point to check
* @return {false|number} result - relative position on the curve (value between 0 and 1), false when not on curve
*/
export function relativeOffsetOnCurve(start, cp1, cp2, end, check) {
if (start.sitsOn(check)) return 0
if (end.sitsOn(check)) return 1
let curve = new Bezier(
{ x: start.x, y: start.y },
{ x: cp1.x, y: cp1.y },