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ems-frontend/node_modules/zrender/lib/contain/line.js

@@ -0,0 +1,24 @@
+export function containStroke(x0, y0, x1, y1, lineWidth, x, y) {
+    if (lineWidth === 0) {
+        return false;
+    }
+    var _l = lineWidth;
+    var _a = 0;
+    var _b = x0;
+    if ((y > y0 + _l && y > y1 + _l)
+        || (y < y0 - _l && y < y1 - _l)
+        || (x > x0 + _l && x > x1 + _l)
+        || (x < x0 - _l && x < x1 - _l)) {
+        return false;
+    }
+    if (x0 !== x1) {
+        _a = (y0 - y1) / (x0 - x1);
+        _b = (x0 * y1 - x1 * y0) / (x0 - x1);
+    }
+    else {
+        return Math.abs(x - x0) <= _l / 2;
+    }
+    var tmp = _a * x - y + _b;
+    var _s = tmp * tmp / (_a * _a + 1);
+    return _s <= _l / 2 * _l / 2;
+}