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我在 svg edit 2.7 中工作,我在 svg 中的路径标签中工作,我创建了一些不规则形状的路径。然后我可以将任何 svg 对象拖到路径标签上方或内部。当我在路径标签上方或内部拖放时,它将为该对象角度生成最接近的绘制 x 和 y 点。我需要将 SVG 对象拖到路径标签上我需要更改角度(转换部分:旋转)。例如,我在工作区绘制路径(表面),我需要拖放到该路径(表面)上。在这里,我附上了基于问题的图像:

图像拖放 在这里,我发现路径标记中的所有点。但是当拖动的对象留在该路径边界中时,我需要得到准确的点。

以下代码用于获取最近的路径点

function closestPoint(pathNode, point) {
  var pathLength = pathNode.getTotalLength(),
      precision = pathLength / pathNode.pathSegList.numberOfItems * .125,
      best,
      bestLength,
      bestDistance = Infinity;

  // linear scan for coarse approximation
  for (var scan, scanLength = 0, scanDistance; scanLength <= pathLength; scanLength += precision) {
    if ((scanDistance = distance2(scan = pathNode.getPointAtLength(scanLength))) < bestDistance) {
      best = scan, bestLength = scanLength, bestDistance = scanDistance;
    }
  }

  // binary search for precise estimate
  precision *= .5;
  while (precision > .5) {
    var before,
        after,
        beforeLength,
        afterLength,
        beforeDistance,
        afterDistance;
    if ((beforeLength = bestLength - precision) >= 0 && (beforeDistance = distance2(before = pathNode.getPointAtLength(beforeLength))) < bestDistance) {
      best = before, bestLength = beforeLength, bestDistance = beforeDistance;
    } else if ((afterLength = bestLength + precision) <= pathLength && (afterDistance = distance2(after = pathNode.getPointAtLength(afterLength))) < bestDistance) {
      best = after, bestLength = afterLength, bestDistance = afterDistance;
    } else {
      precision *= .5;
    }
  }
  best = [best.x, best.y];
  best.distance = Math.sqrt(bestDistance);
  return best;

  function distance2(p) {
    var dx = p.x - point[0],
        dy = p.y - point[1];
    return dx * dx + dy * dy;
  }
}

上面的代码用于在路径标签中查找相邻行。

    var segments = pathNode.pathSegList;
      for (var i=0,len=segments.numberOfItems;i<len;++i){
      var segment = segments.getItem(i);
      switch(segment.pathSegType){
      case SVGPathSeg.PATHSEG_LINETO_ABS:
// segment is a SVGPathSegLinetoAbs object
      console.log( "Absolute Line To", segment.x, segment.y );
      break;
      case SVGPathSeg.PATHSEG_CLOSEPATH:
      break;
      }
   }

这里 绝对线 TO导致路径标记中的所有点。当用户将门对象离开路径标记的第二行时,如何获取路径中的 x 和 y 坐标。提前致谢

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