[WIP] Refactoring vtk.js internals into Typescript

Sources/Common/Core/ClassHierarchy/index.d.ts

@@ -0,0 +1,3 @@
+export default class ClassHierarchy extends Array {
+    push(...args: string[]): number;
+}

Sources/Common/Core/ClassHierarchy/index.ts

@@ -0,0 +1,7 @@
+export default class ClassHierarchy extends Array {
+  push(...args: string[]) {
+    // no perf issue since args.length should be small
+    const newArgs = args.filter((arg) => !this.includes(arg));
+    return super.push(...newArgs);
+  }
+}

Sources/Filters/General/OutlineFilter/OutlineFilter.ts

@@ -0,0 +1,104 @@
+import macro, {
+  AlgoModel,
+  IndexableAPI,
+  IndexableModel,
+} from 'vtk.js/Sources/macros';
+import vtkPolyData from 'vtk.js/Sources/Common/DataModel/PolyData';
+import { vtkObject, vtkOutputPort } from 'vtk.js/Sources/interfaces';
+import { default as PublicAPI } from '.';
+
+const { vtkErrorMacro } = macro;
+
+// prettier-ignore
+export const BOUNDS_MAP = [
+  0, 2, 4, // pt 0
+  1, 2, 4, // pt 1
+  0, 3, 4, // pt 2
+  1, 3, 4, // pt 3
+  0, 2, 5, // pt 4
+  1, 2, 5, // pt 5
+  0, 3, 5, // pt 6
+  1, 3, 5, // pt 7
+];
+
+// prettier-ignore
+export const LINE_ARRAY = [
+  2, 0, 1,
+  2, 2, 3,
+  2, 4, 5,
+  2, 6, 7,
+  2, 0, 2,
+  2, 1, 3,
+  2, 4, 6,
+  2, 5, 7,
+  2, 0, 4,
+  2, 1, 5,
+  2, 2, 6,
+  2, 3, 7,
+];
+
+interface Model extends AlgoModel {}
+
+export type vtkOutlineFilterModel = Model;
+
+// ----------------------------------------------------------------------------
+// vtkOutlineFilter methods
+// ----------------------------------------------------------------------------
+
+function vtkOutlineFilter(publicAPI: PublicAPI, model: Model) {
+  // Set our className
+  model.classHierarchy.push('vtkOutlineFilter');
+
+  publicAPI.requestData = (inData, outData) => {
+    // implement requestData
+    const input = inData[0];
+
+    if (!input) {
+      vtkErrorMacro('Invalid or missing input');
+      return;
+    }
+
+    const bounds = input.getBounds();
+    const output = vtkPolyData.newInstance();
+
+    output
+      .getPoints()
+      .setData(Float32Array.from(BOUNDS_MAP.map((idx) => bounds[idx])), 3);
+    output.getLines().setData(Uint16Array.from(LINE_ARRAY));
+
+    outData[0] = output;
+  };
+}
+
+// ----------------------------------------------------------------------------
+// Object factory
+// ----------------------------------------------------------------------------
+
+const DEFAULT_VALUES = {};
+
+// ----------------------------------------------------------------------------
+
+export function extend(
+  publicAPI: IndexableAPI<PublicAPI>,
+  model: IndexableModel<Model>,
+  initialValues = {}
+) {
+  Object.assign(model, DEFAULT_VALUES, initialValues);
+
+  // Make this a VTK object
+  macro.obj(publicAPI, model);
+
+  // Also make it an algorithm with one input and one output
+  macro.algo(publicAPI, model, 1, 1);
+
+  // Object specific methods
+  vtkOutlineFilter(publicAPI, model);
+}
+
+// ----------------------------------------------------------------------------
+
+export const newInstance = macro.newInstance(extend, 'vtkOutlineFilter');
+
+// ----------------------------------------------------------------------------
+
+export default { newInstance, extend, BOUNDS_MAP, LINE_ARRAY };