Use jscad in vue

jess yan

@z3dev I want to develop a web system that displays CAD models based on jscad and can adjust the models through simple parameter configuration. The scene code is converted to vue, the scene can be displayed normally, but how to add the model to the scene smoothly? I can't find related content in jscad-web.

z3dev

@jess-yan Super! Please let us know when a working website is available. There are many of us that want to extend JSCAD in various ways.

jess yan

@z3dev OK! Can now display 2D！！！

z3dev

@jess-yan Here's the fix...

diff --git a/src/viewerComponent.js b/src/viewerComponent.js
index 95b9321..f5bbbdd 100644
--- a/src/viewerComponent.js
+++ b/src/viewerComponent.js
@@ -77,6 +77,7 @@ const setupRenderer = (containerElement, data) => {
     drawCommands: {
       drawGrid: drawCommands.drawGrid,
       drawAxis: drawCommands.drawAxis,
+      drawLines: drawCommands.drawLines,
       drawMesh: drawCommands.drawMesh
     },

z3dev

@jess-yan you found a bug! i'll patch today, and let you know when the new version is available.

jess yan

@z3dev said in Use jscad in vue:

@jess-yan Welcome!

The WEB UI is based on a different reactive framework called 'most'. I would not recommend using this.

You might be interested in the small VUE components that I created to show how to use JSCAD within the VUE framework.

https://github.com/z3dev/vue-components

It's still in progress so let me know if you have any issues.

For vue-components, I removed vuex related content, which I think is cleaner and easier to use.

jess yan

@z3dev Thank you for your help, good news! I successfully built a model display system using vue+JSCAD. It can directly display .dxf files. But I was frustrated to find that my system cannot display 2D graphics. 截屏2021-09-10 下午6.33.27.png
When did I have a problem because the system has no abnormal information. 2D files can also be successfully compiled, that is, there is no display on the canvas.
My key is to be consistent with the key code in vue-components. I didn't use vue-components directly, and I can also key code on the basis of vue.

export default {
  name: 'cad-viewer',
  props: {
    solids: {
      type: Array,
    },
    grid: {
      type: Object,
    },
    axis: {
      type: Object,
    },
    cameraPosition: {
      type: Array,
      default: () => [150, -180, 233],
    },
  },
  data() {
    return {
      render: () => {},
      updateView: true,
      rotateDelta: [0, 0],
      panDelta: [0, 0],
      zoomDelta: 0,
      zoom2Fit: false,
      // state to track mouse
      mouse: {
        buttons: 0,
        shiftKey: false,
        isOrbiting: false,
        lastClick: 0, // ms
        lastZoom: 0,
      },
      controls: orbitControls.defaults,
      camera: {
        ...perspectiveCamera.defaults,
        position: this.cameraPosition,
      },
    }
  },
  computed: {
    gridOptions() {
      const {
        show = false,
        color = [0, 0, 0, 1],
        subColor = [0, 0, 1, 0.5],
        fadeOut = false,
        transparent = false,
        size = [200, 200],
        ticks = [50, 5],
      } = this.grid
      return {
        visuals: {
          drawCmd: 'drawGrid',
          show,
          color,
          subColor,
          fadeOut,
          transparent,
        },
        size,
        ticks,
      }
    },
    axisOptions() {
      const { show = true } = this.axis
      return {
        visuals: {
          drawCmd: 'drawAxis',
          show,
        },
      }
    },
    content() {
      return {
        // define the visual content
        camera: this.camera,
        drawCommands: {
          drawGrid: drawCommands.drawGrid,
          drawAxis: drawCommands.drawAxis,
          drawMesh: drawCommands.drawMesh,
        },
        entities: [this.gridOptions, this.axisOptions, ...this.solids],
      }
    },
  },
  watch: {
    solids() {
      this.updateView = true
    },
    grid() {
      this.updateView = true
    },
    cameraPosition(position) {
      this.camera.position = position
      this.updateView = true
    },
  },
  created() {
    numberOfInstances++
    this.id = numberOfInstances
  },
  mounted() {
    this.initializeRenderer()
  },
  methods: {
    initializeRenderer() {
      this.$el.id = `viewer${this.id}`
      const width = this.$el.clientWidth
      const height = this.$el.clientHeight

      perspectiveCamera.setProjection(this.camera, this.camera, {
        width,
        height,
      })
      perspectiveCamera.update(this.camera, this.camera)

      // prepare the renderer
      const setupOptions = {
        glOptions: { container: this.$el },
      }
      this.renderer = prepareRender(setupOptions)

      window.addEventListener('resize', () => {
        this.updateView = true
      })

      // 告诉浏览器希望执行一次动画，并在下次重绘制前执行回调函数
      window.requestAnimationFrame(this.updateAndRender)
    },
    updateAndRender() {
      // 处理相机和轨道
      this.doRotatePanZoom()

      if (this.updateView) {
        const updates = orbitControls.update({
          controls: this.controls,
          camera: this.camera,
        })

        this.controls = { ...this.controls, ...updates.controls }
        this.updateView = this.controls.changed

        this.camera.position = updates.camera.position
        perspectiveCamera.update(this.camera)

        this.resize()

        const { content } = this

        // TODO 这里的处理不知道是否合适
        content.entities = content.entities
          .reduce((pre, cur) => {
            if (!cur.visuals) {
              pre.push(...entitiesFromSolids({}, cur))
            }
            pre.push(cur)
            return pre
          }, [])
          .filter((item) => item.visuals)
        this.renderer(content)
      }
      window.requestAnimationFrame(this.updateAndRender)
    },
    doRotatePanZoom() {
      let {
        rotateDelta,
        panDelta,
        zoomDelta,
        zoom2Fit,
        controls,
        camera,
        content,
      } = this

      // 旋转增量存在
      if (rotateDelta[0] || rotateDelta[1]) {
        const updated = orbitControls.rotate(
          { controls, camera, speed: rotateSpeed },
          rotateDelta
        )
        this.controls = { ...controls, ...updated.controls }
        this.rotateDelta = [0, 0]
        this.updateView = true
      }

      // 平移增量存在
      if (panDelta[0] || panDelta[1]) {
        const updated = orbitControls.pan(
          { controls, camera, speed: panSpeed },
          panDelta
        )
        this.camera.position = updated.camera.position
        this.camera.target = updated.camera.target
        this.panDelta = [0, 0]
        this.updateView = true
      }

      // 缩放增量存在
      if (zoomDelta) {
        const updated = orbitControls.zoom(
          { controls, camera, speed: zoomSpeed },
          zoomDelta
        )
        this.controls = { ...controls, ...updated.controls }
        this.zoomDelta = 0
        this.updateView = true
      }

      // 缩放到合适比例
      if (zoom2Fit) {
        // 缩放到缩放比为2
        controls.zoomToFit.tightness = 2
        const updated = orbitControls.zoomToFit({
          controls,
          camera,
          entities: content.entities.filter((entity) => entity.geometry),
        })
        this.controls = { ...controls, ...updated.controls }
        this.zoom2Fit = false
        this.updateView = true
      }
    },
    resize() {
      // 像素比例
      const pixelRatio = window.devicePixelRatio || 1
      // 获取元素大小和相对于视口位置
      const bounds = this.$el.getBoundingClientRect()

      // 计算元素边界尺寸
      const width = (bounds.right - bounds.left) * pixelRatio
      const height = (bounds.bottom - bounds.top) * pixelRatio

      // 获取元素真实尺寸
      const prevWidth = this.$el.width
      const prevHeight = this.$el.height

      // 如果尺寸发生变化
      if (prevWidth !== width || prevHeight !== height) {
        // 更新元素的尺寸
        this.$el.width = width
        this.$el.height = height

        // 设置相机投影
        perspectiveCamera.setProjection(this.camera, this.camera, {
          width,
          height,
        })
        // 更新相机
        perspectiveCamera.update(this.camera, this.camera)
        this.updateView = true
      }
    },
    // mouse event handling
    onMouseDown(event) {
      const { mouse } = this
      mouse.buttons = event.buttons
      mouse.shiftKey = event.shiftKey
      mouse.isOrbiting = true
    },
    onMouseUp() {
      const now = Date.now()
      const { mouse } = this
      if (mouse.lastClick) {
        const ms = now - mouse.lastClick
        if (ms < doubleClickSpeed) {
          if (mouse.isOrbiting) {
            this.zoom2Fit = true
          }
        }
      }
      mouse.lastClick = now
      mouse.buttons = 0
      mouse.shiftKey = false
      mouse.isOrbiting = false
    },
    onMouseMove(event) {
      const { mouse, panDelta, rotateDelta } = this
      if (mouse.isOrbiting) {
        if (mouse.shiftKey) {
          panDelta[0] -= event.movementX
          panDelta[1] += event.movementY
        } else {
          rotateDelta[0] += event.movementX
          rotateDelta[1] -= event.movementY
        }
      }
    },
    onScroll(event) {
      event.preventDefault()
      this.zoomDelta = event.deltaY
    },
  },
}

z3dev

@jess-yan Welcome!

The WEB UI is based on a different reactive framework called 'most'. I would not recommend using this.

You might be interested in the small VUE components that I created to show how to use JSCAD within the VUE framework.

https://github.com/z3dev/vue-components

It's still in progress so let me know if you have any issues.