feat(transform): add vtkTransform

Author: finetjul

Sources/Common/Transform/Transform/index.js

@@ -0,0 +1,56 @@
+import { vec3 } from 'gl-matrix';
+import macro from 'vtk.js/Sources/macros';
+import vtkMath from 'vtk.js/Sources/Common/Core/Math';
+import { IDENTITY } from 'vtk.js/Sources/Common/Core/Math/Constants';
+
+// ----------------------------------------------------------------------------
+// vtkTransform methods
+// ----------------------------------------------------------------------------
+// eslint-disable-next-line import/no-mutable-exports
+let newInstance;
+
+function vtkTransform(publicAPI, model) {
+  // Set our className
+  model.classHierarchy.push(
+    'vtkAbstractTransform',
+    'vtkHomogeneousTransform',
+    'vtkTransform'
+  );
+
+  publicAPI.transformPoint = (point, out) => {
+    vec3.transformMat4(out, point, model.matrix);
+    return out;
+  };
+
+  publicAPI.getInverse = () =>
+    newInstance({
+      matrix: vtkMath.invertMatrix(Array.from(model.matrix), [], 4),
+    });
+}
+
+// ----------------------------------------------------------------------------
+// Object factory
+// ----------------------------------------------------------------------------
+
+const DEFAULT_VALUES = {
+  matrix: [...IDENTITY],
+};
+
+// ----------------------------------------------------------------------------
+
+export function extend(publicAPI, model, initialValues = {}) {
+  Object.assign(model, DEFAULT_VALUES, initialValues);
+  macro.obj(publicAPI, model);
+
+  macro.setGetArray(publicAPI, model, ['matrix'], 16);
+
+  vtkTransform(publicAPI, model);
+}
+
+// ----------------------------------------------------------------------------
+newInstance = macro.newInstance(extend, 'vtkTransform');
+export { newInstance };
+
+// ----------------------------------------------------------------------------
+
+export default { newInstance, extend };

Sources/Common/Transform/index.js

@@ -1,5 +1,7 @@
 import vtkLandmarkTransform from './LandmarkTransform';
+import vtkTransform from './Transform';
 
 export default {
   vtkLandmarkTransform,
+  vtkTransform,
 };