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Clean up line intersection function

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Catalin Constantin Mititiuc
2025-12-28 14:35:39 -08:00
parent e8cc4e5241
commit e1e2c479af
1 changed files with 6 additions and 3 deletions
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@@ -529,10 +529,13 @@
return edge || actualCorner; return edge || actualCorner;
} }
function lineIntxnPt({ x1, y1, x2, y2 }, {x1: x3, y1: y3, x2: x4, y2: y4 }) { function lineIntxnPt({ x1, y1, x2, y2 }, { x1: x3, y1: y3, x2: x4, y2: y4 }) {
// https://en.wikipedia.org/wiki/Line%E2%80%93line_intersection#Given_two_points_on_each_line // https://en.wikipedia.org/wiki/Line%E2%80%93line_intersection#Given_two_points_on_each_line
const x = ((x1*y2-y1*x2)*(x3-x4)-(x1-x2)*(x3*y4-y3*x4))/((x1-x2)*(y3-y4)-(y1-y2)*(x3-x4)); const denominator = (x1 - x2) * (y3 - y4) - (y1 - y2) * (x3 - x4);
const y = ((x1*y2-y1*x2)*(y3-y4)-(y1-y2)*(x3*y4-y3*x4))/((x1-x2)*(y3-y4)-(y1-y2)*(x3-x4)); const l1Det = x1 * y2 - y1 * x2;
const l2Det = x3 * y4 - y3 * x4;
const x = (l1Det * (x3 - x4) - (x1 - x2) * l2Det) / denominator;
const y = (l1Det * (y3 - y4) - (y1 - y2) * l2Det) / denominator;
return { x: x, y: y }; return { x: x, y: y };
} }
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