From 0dc51c2239586e1fb6c17704dc5804fe1cdb391f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?J=C3=BCrg=20Lehni?= <juerg@scratchdisk.com>
Date: Sat, 14 Dec 2019 20:32:00 +0100
Subject: [PATCH] Include BooleanOperations example from website

---
 examples/Paperjs.org/BooleanOperattions.html | 115 +++++++++++++++++++
 1 file changed, 115 insertions(+)
 create mode 100644 examples/Paperjs.org/BooleanOperattions.html
diff --git a/examples/Paperjs.org/BooleanOperattions.html b/examples/Paperjs.org/BooleanOperattions.html
new file mode 100644
index 00000000..930d7078
--- /dev/null
+++ b/examples/Paperjs.org/BooleanOperattions.html
@@ -0,0 +1,115 @@
+<!DOCTYPE html>
+<html>
+<head>
+    <meta charset="UTF-8">
+    <title>Path Intersections</title>
+    <link rel="stylesheet" href="../css/style.css">
+    <script type="text/javascript" src="../../dist/paper-full.js"></script>
+    <script type="text/paperscript" canvas="canvas">
+        var text = new PointText({
+            position: view.center + [0, 200],
+            fillColor: 'black',
+            justification: 'center',
+            fontSize: 20
+        });
+
+        var originals = new Group({ insert: false }); // Don't insert in DOM.
+
+        var square = new Path.Rectangle({
+            position: view.center,
+            size: 300,
+            parent: originals,
+            fillColor: 'white'
+        });
+
+        // Make a ring using subtraction of two circles:
+        var inner = new Path.Circle({
+            center: view.center,
+            radius: 100,
+            parent: originals,
+            fillColor: 'white'
+        });
+
+        var outer = new Path.Circle({
+            center: view.center,
+            radius: 140,
+            parent: originals,
+            fillColor: 'white'
+        });
+
+        var ring = outer.subtract(inner);
+
+        var operations = ['unite', 'intersect', 'subtract', 'exclude', 'divide'];
+        var colors = ['red', 'green', 'blue', 'black'];
+        var curIndex = -1;
+        var operation, result, activeItem;
+
+        // Change the mode every 3 seconds:
+        setInterval(setMode, 3000);
+
+        // Set the initial mode:
+        setMode();
+
+        function setMode() {
+            curIndex++;
+            if (curIndex == operations.length * 2)
+                curIndex = 0;
+            operation = operations[curIndex % operations.length];
+        }
+
+        function onMouseDown(event) {
+            var hitResult = originals.hitTest(event.point);
+            activeItem = hitResult && hitResult.item;
+        }
+
+        function onMouseDrag(event) {
+            if (activeItem)
+                activeItem.position = event.point;
+        }
+
+        function onMouseUp() {
+            activeItem = null;
+            square.position = view.center;
+        }
+
+        function onFrame(event) {
+            if (activeItem != ring) {
+                // Move the ring around:
+                var offset = new Point(140, 80) * [Math.sin(event.count / 60), Math.sin(event.count / 40)];
+                ring.position = view.center + offset;
+            }
+
+            // Remove the result of the last path operation:
+            if (result)
+                result.remove();
+
+            // Perform the path operation on the ring:
+            if (curIndex < operations.length) {
+                result = square[operation](ring);
+                text.content = 'square.' + operation + '(ring)';
+            } else {
+                result = ring[operation](square);
+                text.content = 'ring.' + operation + '(square)';
+            }
+            result.selected = true;
+            result.fillColor = colors[curIndex % colors.length];
+            result.moveBelow(text);
+
+            // If the result is a group, color each of its children differently:
+            if (result instanceof Group) {
+                for (var i = 0; i < result.children.length; i++) {
+                    result.children[i].fillColor = colors[i];
+                }
+            }
+        };
+
+        function onResize() {
+            text.position = view.center + [0, 200];
+            square.position = view.center;
+        }
+    </script>
+</head>
+<body>
+<canvas id="canvas" resize></canvas>
+</body>
+</html>
