Javascript fabric.js如何在旋转矩形旁边添加矩形
我正在努力将代表太阳能电池板的矩形放置在给定房屋的屋顶上。用户可以旋转矩形使其与屋顶对齐。在添加相邻矩形而不旋转所选面板之前,代码工作正常。但是,在正确计算与旋转矩形相邻的新矩形的位置时,我面临着一个问题。代码如下:Javascript fabric.js如何在旋转矩形旁边添加矩形,javascript,jquery,html,Javascript,Jquery,Html,我正在努力将代表太阳能电池板的矩形放置在给定房屋的屋顶上。用户可以旋转矩形使其与屋顶对齐。在添加相邻矩形而不旋转所选面板之前,代码工作正常。但是,在正确计算与旋转矩形相邻的新矩形的位置时,我面临着一个问题。代码如下: <!DOCTYPE html> <html> <head> <title>Panel Positioner</title> <meta charset="UTF-8">
<!DOCTYPE html>
<html>
<head>
<title>Panel Positioner</title>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width">
<script src="http://ajax.aspnetcdn.com/ajax/jQuery/jquery-2.1.0.min.js"></script>
<script src="http://cdnjs.cloudflare.com/ajax/libs/fabric.js/1.4.0/fabric.min.js"></script>
<script type="text/javascript">
$(document).ready(function() {
var solar_panel = {"width": 57, "height": 94}; // Default pixles on 5M zoom
var offset = 58;
var rads = 0;
var position = {};
var id = 1;
$('#add-panel').click(function() {
addPanel();
});
function addPanel() {
if (id === 1) {
canvas = new fabric.Canvas('c1');
canvas.on("after:render", function() {
canvas.calcOffset();
});
canvas.on('object:moving', function(e) {
var activeObject = e.target;
position.x = activeObject.get('left');
position.y = activeObject.get('top');
});
canvas.on('object:rotating', function(e) {
var activeObject = e.target;
var angle = activeObject.get('angle');
rads = (activeObject.get('angle') * Math.PI / 180.0);
});
}
var markerPt2 = position;
markerPt2.x += offset * Math.cos(-rads);
markerPt2.y -= offset * Math.sin(-rads);
rect = new fabric.Rect({
id: id,
left: markerPt2.x,
top: markerPt2.y,
fill: 'grey',
width: solar_panel.width,
height: solar_panel.height,
borderColor: 'black',
stroke: '#000',
lockScalingX: true,
lockScalingY: true,
hasRotatingPoint: true,
});
rect.set('angle', rads * 180.0 / Math.PI);
id++;
canvas.add(rect);
canvas.renderAll();
}
});
</script>
</head>
<body>
<canvas id="c1" width="800" height="600" style="z-index:1000; border: 2px solid black;" ></canvas>
<input type="button" id="add-panel" name="add-panel" value="Add Panel" />
</body>
</html>
面板定位器
$(文档).ready(函数(){
var太阳能电池板={“宽度”:57,“高度”:94};//5M缩放时的默认像素
var偏移=58;
var-rads=0;
var位置={};
var-id=1;
$(“#添加面板”)。单击(函数(){
addPanel();
});
函数addPanel(){
如果(id==1){
canvas=新的fabric.canvas('c1');
on(“after:render”,function()){
canvas.calcOffset();
});
canvas.on('object:moving',function(e){
var activeObject=e.target;
position.x=activeObject.get('left');
position.y=activeObject.get('top');
});
canvas.on('对象:旋转',函数(e){
var activeObject=e.target;
var angle=activeObject.get('angle');
rads=(activeObject.get('angle')*Math.PI/180.0);
});
}
var-markerPt2=位置;
markerPt2.x+=偏移量*数学cos(-rads);
markerPt2.y-=偏移量*数学sin(-rads);
rect=新结构。rect({
id:id,
左:markerPt2.x,
上图:markerPt2.y,
填充:“灰色”,
宽度:太阳能电池板。宽度,
高度:太阳能电池板高度,
边框颜色:“黑色”,
笔划:“#000”,
lockScalingX:对,
lockScalingY:是的,
hasRotatingPoint:对,
});
矩形集('角度',rads*180.0/Math.PI);
id++;
canvas.add(rect);
canvas.renderAll();
}
});
好的,经过一番努力,我发现我自己的脚本出了什么问题。
这涉及到两件重要的事情:
if(rotated == false) {
markerPt2.x += offset * Math.cos(-rads);
markerPt2.y -= offset * Math.sin(-rads);
} else {
rotated = false;
}