initial scrappy integration

app/web/src/helpers/cadPackages/jsCadController.ts

@@ -1,11 +1,107 @@
-import { RenderArgs, DefaultKernelExport, createUnhealthyResponse } from './common'
+import { result } from 'lodash'
+import { RenderArgs, DefaultKernelExport, createUnhealthyResponse, createHealthyResponse } from './common'
+import { MeshPhongMaterial, LineBasicMaterial, BufferGeometry , BufferAttribute, Line, LineSegments, Color, Mesh, Group} from 'three/build/three.module'
+
+
+const materials = {
+	mesh: {
+		def: new MeshPhongMaterial( { color: 0x0084d1, flatShading: true } ),
+		material: MeshPhongMaterial,
+	},
+	line: {
+		def: new LineBasicMaterial( { color: 0x0000ff } ),
+		material: LineBasicMaterial,
+	},
+  lines:null
+}
+materials.lines = materials.line
+
+function CSG2Object3D(obj){
+	const {vertices, indices, color, transforms} = obj
+
+	let materialDef = materials[obj.type]
+  if(!materialDef){
+      console.error('Can not hangle object type: '+obj.type, obj)
+      return null
+  }
+
+	let material = materialDef.def
+	if(color){
+		let c = color
+		material = new materialDef.material({ color: new Color(c[0],c[1],c[2]), flatShading: true, opacity: c[3] === void 0 ? 1:c[3], transparent: c[3] != 1 && c[3] !== void 0})
+	}
+
+	var geo = new BufferGeometry()
+	if(transforms) geo.applyMatrix4({elements:transforms})
+	geo.setAttribute('position', new BufferAttribute(vertices,3))
+
+	switch(obj.type){
+		case 'mesh': geo.setIndex(new BufferAttribute(indices,1)); return new Mesh(geo, material)
+		case 'line': return new Line(geo, material)
+		case 'lines': return new LineSegments(geo, material)
+	}
+}
+
+let scriptWorker
+const scriptUrl = '/demo-worker.js'
+let resolveReference = null
+let response = null
+
+const callResolve = ()=>{
+  if(resolveReference) resolveReference()
+  resolveReference
+}
 
 export const render: DefaultKernelExport['render'] = async ({
   code,
   settings,
 }: RenderArgs) => {
-  // do your magic
-  return createUnhealthyResponse( new Date(), 'JSCAD controller not implemented yet')
+
+  if(!scriptWorker){
+    const baseURI = document.baseURI.toString()
+    const script =`let baseURI = '${baseURI}'
+importScripts(new URL('${scriptUrl}',baseURI))
+let worker = jscadWorker({
+  baseURI: baseURI,
+  scope:'worker', 
+  convertToSolids: 'buffers',
+  callback:(params)=>self.postMessage(params), 
+})
+self.addEventListener('message', (e)=>worker.postMessage(e.data))
+`
+    let blob = new Blob([script],{type: 'text/javascript'})
+    scriptWorker = new Worker(window.URL.createObjectURL(blob))
+    scriptWorker.addEventListener('message',(e)=>{
+      console.log('message from worker', e.data)
+      let data = e.data
+      if(data.action == 'entities'){
+        let group = new Group()
+        data.entities.map(CSG2Object3D).filter(o=>o).forEach(o=>group.add(o))
+        response = createHealthyResponse( {
+          type: 'geometry',
+          data: group,
+          consoleMessage: data.scriptStats,
+          date: new Date(),
+        })
+        callResolve()     
+      }
+    })
+
+    callResolve()
+    response = null
+    scriptWorker.postMessage({action:'init', baseURI, alias:[]})    
+  }
+  scriptWorker.postMessage({action:'runScript', worker:'script', script:code, url:'jscad_script' })    
+  
+  let waitResult = new Promise(resolve=>{
+    resolveReference = resolve
+  })
+
+  await waitResult
+  resolveReference = null
+  console.log('response', response)
+  if(!response)
+  return response
 }
 
 const jsCadController: DefaultKernelExport = {