Cesium画点线面

1、在原<a href="https://github.com/leforthomas/cesium-drawhelper" target="_blank">cesium-drawhelper</a>基础上，修改了DrawHelper.js部分地方，从而能够支持最新的cesium v1.41，具体修改说明如下： <br/> 2、294行 <br/> lineWidth: Math.min(this.strokeWidth || 4.0, context._aliasedLineWidthRange[1]) <br/> 改为: <br/> lineWidth: 1.0 <br/> 3、977行开始 <br/> <pre> function updateExtent(value) { if (extent == null) { extent = new Cesium.RectanglePrimitive(); extent.asynchronous = false; primitives.add(extent); } extent.rectangle = value; // update the markers var corners = getExtentCorners(value); // create if they do not yet exist if (markers == null) { markers = new _.BillboardGroup(_self, defaultBillboard); markers.addBillboards(corners); } else { markers.updateBillboardsPositions(corners); } } // Now wait for start mouseHandler.setInputAction(function (movement) { if (movement.position != null) { var cartesian = scene.camera.pickEllipsoid(movement.position, ellipsoid); if (cartesian) { if (extent == null) { // create the rectangle firstPoint = ellipsoid.cartesianToCartographic(cartesian); var value = getExtent(firstPoint, firstPoint); updateExtent(value); } else { _self.stopDrawing(); if (typeof options.callback == 'function') { options.callback(getExtent(firstPoint, ellipsoid.cartesianToCartographic(cartesian))); } } } } }, Cesium.ScreenSpaceEventType.LEFT_DOWN); mouseHandler.setInputAction(function (movement) { var position = movement.endPosition; if (position != null) { if (extent == null) { tooltip.showAt(position, "<p>Click to start drawing rectangle</p>"); } else { var cartesian = scene.camera.pickEllipsoid(position, ellipsoid); if (cartesian) { var value = getExtent(firstPoint, ellipsoid.cartesianToCartographic(cartesian)); updateExtent(value); tooltip.showAt(position, "<p>Drag to change rectangle extent</p><p>Click again to finish drawing</p>"); } } } }, Cesium.ScreenSpaceEventType.MOUSE_MOVE); } </pre> <br/> 替换为： <br/> <pre> // Now wait for start mouseHandler.setInputAction(function (movement) { if (movement.position != null) { var cartesian = scene.camera.pickEllipsoid(movement.position, ellipsoid); if (cartesian) { if (extent == null) { // create the rectangle firstPoint = ellipsoid.cartesianToCartographic(cartesian); var value = getExtent(firstPoint, firstPoint); extent = new _.ExtentPrimitive({ extent: value, asynchronous: false, material: options.material }); primitives.add(extent); markers = new _.BillboardGroup(_self, defaultBillboard); var corners = getExtentCorners(value); markers.addBillboards(corners); } else { _self.stopDrawing(); if (typeof options.callback == 'function') { options.callback(getExtent(firstPoint, ellipsoid.cartesianToCartographic(cartesian))); } } } } }, Cesium.ScreenSpaceEventType.LEFT_DOWN); mouseHandler.setInputAction(function (movement) { var position = movement.endPosition; if (position != null) { if (extent == null) { tooltip.showAt(position, "<p>Click to start drawing rectangle</p>"); } else { var cartesian = scene.camera.pickEllipsoid(position, ellipsoid); if (cartesian) { var value = getExtent(firstPoint, ellipsoid.cartesianToCartographic(cartesian)); extent.setExtent(value); var corners = getExtentCorners(value); markers.updateBillboardsPositions(corners); tooltip.showAt(position, "<p>Drag to change rectangle extent</p><p>Click again to finish drawing</p>"); } } } }, Cesium.ScreenSpaceEventType.MOUSE_MOVE); } </pre>