push the uni-demo project

2022-06-21 10:55:37 +08:00
parent 37ca848bb6
commit 333705f703
8034 changed files with 1388875 additions and 0 deletions
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+
+import {normalizeRadian} from './util';
+
+const PI2 = Math.PI * 2;
+
+/**
+ * 圆弧描边包含判断
+ */
+export function containStroke(
+    cx: number, cy: number, r: number, startAngle: number, endAngle: number,
+    anticlockwise: boolean,
+    lineWidth: number, x: number, y: number
+): boolean {
+
+    if (lineWidth === 0) {
+        return false;
+    }
+    const _l = lineWidth;
+
+    x -= cx;
+    y -= cy;
+    const d = Math.sqrt(x * x + y * y);
+
+    if ((d - _l > r) || (d + _l < r)) {
+        return false;
+    }
+    // TODO
+    if (Math.abs(startAngle - endAngle) % PI2 < 1e-4) {
+        // Is a circle
+        return true;
+    }
+    if (anticlockwise) {
+        const tmp = startAngle;
+        startAngle = normalizeRadian(endAngle);
+        endAngle = normalizeRadian(tmp);
+    }
+    else {
+        startAngle = normalizeRadian(startAngle);
+        endAngle = normalizeRadian(endAngle);
+    }
+    if (startAngle > endAngle) {
+        endAngle += PI2;
+    }
+
+    let angle = Math.atan2(y, x);
+    if (angle < 0) {
+        angle += PI2;
+    }
+    return (angle >= startAngle && angle <= endAngle)
+        || (angle + PI2 >= startAngle && angle + PI2 <= endAngle);
+}