# BoxGeometry、BoxOutlineGeometry

  • vc-geometry-box 组件用于加载立方体。需要作为 vc-instance-geometry 的子组件使用。
  • vc-geometry-outline-box 组件用于加载立方体轮廓。需要作为 vc-instance-geometry 的子组件使用。
  • 需要作为 vc-instance-geometry 的子组件使用，可以挂载到 vc-primitive。

# 示例

# 加载立方体几何体

# 预览

收起 
  <template>
    <div class="viewer">
      <vc-viewer @ready="ready" @LEFT_CLICK="LEFT_CLICK">
        <vc-primitive :appearance="appearance">
          <vc-instance-geometry :geometry.sync="geometry" :attributes="attributes" :modelMatrix="modelMatrix">
            <vc-geometry-box ref="box" :dimensions="dimensions"></vc-geometry-box>
          </vc-instance-geometry>
        </vc-primitive>
        <vc-primitive :appearance="appearance">
          <vc-instance-geometry :attributes="attributes" :modelMatrix="modelMatrix2">
            <vc-geometry-outline-box ref="boxOutline" :dimensions="dimensions"></vc-geometry-outline-box>
          </vc-instance-geometry>
        </vc-primitive>
      </vc-viewer>
    </div>
  </template>

  <script>
    export default {
      data() {
        return {
          appearance: null,
          attributes: null,
          geometry: null,
          modelMatrix: null,
          modelMatrix2: null,
          dimensions: { x: 400000.0, y: 300000.0, z: 500000.0 }
        }
      },
      mounted() {
        Promise.all([this.$refs.box.createPromise, this.$refs.boxOutline.createPromise]).then((instances) => {
          console.log('All geometries are loaded.')
          const { BoundingSphere } = Cesium
          const boundingSphereUnion = instances.reduce((prev, cur) => {
            const geometry = cur.cesiumObject.constructor.createGeometry(cur.cesiumObject)
            const boundingSphere = BoundingSphere.transform(geometry.boundingSphere, cur.vm.$parent.modelMatrix)
            return prev === null ? boundingSphere : BoundingSphere.union(prev, boundingSphere)
          }, null)
          instances[0].viewer.scene.camera.flyToBoundingSphere(boundingSphereUnion)
        })
      },
      methods: {
        ready({ Cesium, viewer, cesiumObject }) {
          this.viewer = viewer
          const { ColorGeometryInstanceAttribute, PerInstanceColorAppearance, Matrix4, Cartesian3, Transforms } = Cesium
          this.attributes = {
            color: new ColorGeometryInstanceAttribute(Math.random(), Math.random(), Math.random(), 0.5)
          }
          this.appearance = new PerInstanceColorAppearance({
            flat: true
          })
          this.modelMatrix = Matrix4.multiplyByTranslation(
            Transforms.eastNorthUpToFixedFrame(Cartesian3.fromDegrees(105.0, 40.0)),
            new Cartesian3(0.0, 0.0, 250000),
            new Matrix4()
          )
          this.modelMatrix2 = Matrix4.multiplyByTranslation(
            Transforms.eastNorthUpToFixedFrame(Cartesian3.fromDegrees(110.0, 40.0)),
            new Cartesian3(0.0, 0.0, 250000),
            new Matrix4()
          )
        },
        LEFT_CLICK(movement) {
          const feature = this.viewer.scene.pick(movement.position)
          console.log(feature)
        }
      }
    }
  </script>

# 属性

# vc-geometry-box

属性名 类型 默认值 描述
dimensions Object required 指定 box 的长宽高。 结构：{ x: number, y: number, z: number }
vertexFormat Object optional 指定要计算的顶点属性。

# vc-geometry-outline-box

属性名 类型 默认值 描述
dimensions Object required 指定 box 的长宽高。 结构：{ x: number, y: number, z: number }

参考官方文档：BoxOutlineGeometry (opens new window)、BoxGeometry (opens new window)

# 事件

事件名 参数 描述
ready {Cesium, viewer, cesiumObject} 该组件渲染完毕时触发，返回 Cesium 类, viewer 实例，以及当前组件的 cesiumObject。

← vc-geometry-circle →