[英]Can anyone help me convert this paperscript to javascript?
我有來自paper.js的paperscript,我希望將其轉換為javascript,但無法拖動鼠標進行工作。
當將它們聲明為全局函數時,PaperScript可以識別幾個特殊事件處理程序,而在JavaScript中,需要將它們手動安裝在適當的對象上。
<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/paper.js/0.11.5/paper-full.js"></script>
<!-- Define inlined PaperScript associate it with myCanvas -->
<script type="text/paperscript" canvas="myCanvas">
var rectangle = new Rectangle(new Point(50, 50), new Point(150, 100));
var path = new Path.Rectangle(rectangle);
path.fillColor = '#e9e9ff';
path.strokeColor = 'black';
path.strokeWidth = 2;
path.selected = true;
path.closed = true;
var hitOptions = {
segments: true,
stroke: true,
fill: true,
tolerance: 8
};
var segment, path;
var movePath = false;
function onMouseDown(event) {
segment = path = null;
var hitResult = project.hitTest(event.point, hitOptions);
if (!hitResult)
return;
if (event.modifiers.shift) {
if (hitResult.type == 'segment') {
hitResult.segment.remove();
};
return;
}
if (hitResult) {
path = hitResult.item;
if (hitResult.type == 'segment') {
segment = hitResult.segment;
} else if (hitResult.type == 'stroke') {
var location = hitResult.location;
segment = path.insert(location.index + 1, event.point);
//path.smooth();
}
}
movePath = hitResult.type == 'fill';
if (movePath)
project.activeLayer.addChild(hitResult.item);
}
function onMouseMove(event) {
project.activeLayer.selected = false;
if (event.item)
event.item.selected = true;
}
function onMouseDrag(event) {
if (segment) {
segment.point += event.delta;
//path.smooth();
} else if (path) {
path.position += event.delta;
}
}
</script>
<canvas id="myCanvas" resize></canvas>
先感謝您!
這里詳細介紹了 PaperScript
和JavaScript
上下文之間的差異。
為了減少對代碼的更改,您必須:
在全局范圍內安裝 Paper.js
。 這樣,您就可以直接使用Path
, Point
,...之類的類(而無需通過全局paper
對象)。
設置 Paper.js
以使用您的畫布。 這等效於設置PaperScript
canvas
屬性。
創建一個Tool實例,將用於注冊事件處理程序。
操縱點時,請使用數學運算符(如Point.add() )代替運算符(如+
)。
這是您在JavaScript
上下文中工作的代碼。
// expose paperjs classes into global scope paper.install(window); // bind paper to the canvas paper.setup('canvas'); var rectangle = new Rectangle(new Point(50, 50), new Point(150, 100)); var path = new Path.Rectangle(rectangle); path.fillColor = '#e9e9ff'; path.strokeColor = 'black'; path.strokeWidth = 2; path.selected = true; path.closed = true; var hitOptions = { segments: true, stroke: true, fill: true, tolerance: 8 }; var segment, path; var movePath = false; // create a custom tool var customTool = new Tool(); // attach handlers to the tool customTool.onMouseDown = function(event) { segment = path = null; var hitResult = project.hitTest(event.point, hitOptions); if (!hitResult) { return; } if (event.modifiers.shift) { if (hitResult.type == 'segment') { hitResult.segment.remove(); } return; } if (hitResult) { path = hitResult.item; if (hitResult.type == 'segment') { segment = hitResult.segment; } else if (hitResult.type == 'stroke') { var location = hitResult.location; segment = path.insert(location.index + 1, event.point); //path.smooth(); } } movePath = hitResult.type == 'fill'; if (movePath) { project.activeLayer.addChild(hitResult.item); } }; customTool.onMouseMove = function(event) { project.activeLayer.selected = false; if (event.item) { event.item.selected = true; } }; customTool.onMouseDrag = function(event) { if (segment) { // use methods instead of operators segment.point = segment.point.add(event.delta); //path.smooth(); } else if (path) { path.position = path.position.add(event.delta); } };
html, body { margin: 0; overflow: hidden; height: 100%; } canvas[resize] { width: 100%; height: 100%; }
<script src="https://cdnjs.cloudflare.com/ajax/libs/paper.js/0.11.5/paper-core.min.js"></script> <canvas id="canvas" resize></canvas>
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