From 9af681b21f33d0a319ab15aee03ee0495922234c Mon Sep 17 00:00:00 2001
From: Val Erastov <xibyte@gmail.com>
Date: Tue, 15 Jan 2019 19:18:28 -0800
Subject: [PATCH] separate loft preview from actual craft / engine layer
 refactoring

---
 web/app/cad/craft/e0/common.js           |  95 +++++++
 web/app/cad/craft/e0/craftMethods.js     | 147 +++++++++++
 web/app/cad/craft/e0/e0Plugin.js         | 302 +----------------------
 web/app/cad/craft/e0/interact.js         |  23 ++
 web/app/cad/craft/e0/operationHandler.js |  87 +++++++
 web/app/cad/craft/loft/loftPreviewer.js  |   2 +-
 6 files changed, 356 insertions(+), 300 deletions(-)
 create mode 100644 web/app/cad/craft/e0/common.js
 create mode 100644 web/app/cad/craft/e0/craftMethods.js
 create mode 100644 web/app/cad/craft/e0/interact.js
 create mode 100644 web/app/cad/craft/e0/operationHandler.js

diff --git a/web/app/cad/craft/e0/common.js b/web/app/cad/craft/e0/common.js
new file mode 100644
index 00000000..d440af6e
--- /dev/null
+++ b/web/app/cad/craft/e0/common.js
@@ -0,0 +1,95 @@
+export const BOOLEAN_TYPES = {
+  UNION : 1,
+  SUBTRACT: 2,
+  INTERSECT: 3
+};
+
+export const CURVE_TYPES = {
+  SEGMENT: 1,
+  B_SPLINE: 2,
+  CIRCLE: 3,
+  ARC: 4
+};
+
+export const DEFLECTION = 2;
+export const E0_TOLERANCE = 1e-3;
+
+export function singleShellRespone(oldShell, newShellData) {
+  if (newShellData.error) {
+    throw 'operation failed';
+  }
+
+  let consumed = [oldShell];
+  let created = readShellData(newShellData, consumed, oldShell.csys);
+  return {
+    consumed: consumed,
+    created: [created]
+  };
+}
+
+export function readShellData(data, consumed, csys) {
+  let tpi = __CAD_APP.services.tpi;
+  let model = new tpi.scene.readShellEntityFromJson(data, consumed, csys);
+  model.brepShell.data.externals.engine = 'e0';
+  return model;
+}
+
+export function managedByE0(mShell) {
+  let externals = mShell.brepShell && mShell.brepShell.data && mShell.brepShell.data.externals;
+  return externals && externals.engine === 'e0';
+}
+
+export function readSketchContour(contour, face) {
+  let tr = face.csys.outTransformation;
+  let path = [];
+  contour.segments.forEach(s => {
+    if (s.isCurve) {
+      if (s.constructor.name === 'Circle') {
+        const dir = face.csys.z.data();
+        path.push({TYPE: CURVE_TYPES.CIRCLE, c: tr.apply(s.c).data(), dir, r: s.r});
+      } else if (s.constructor.name === 'Arc') {
+        let a = s.inverted ? s.b : s.a;
+        let b = s.inverted ? s.a : s.b;
+        let tangent = tr._apply(s.c.minus(a))._cross(face.csys.z)._normalize();
+        if (s.inverted) {
+          tangent._negate();
+        }
+        path.push({
+          TYPE: CURVE_TYPES.ARC,
+          a: tr.apply(a).data(),
+          b: tr.apply(b).data(),
+          tangent: tangent.data()
+        });
+      } else {
+        let nurbs = s.toNurbs(face.csys).impl;
+        path.push(Object.assign({TYPE: CURVE_TYPES.B_SPLINE}, nurbs.serialize()));
+      }
+    } else {
+      let ab = [s.a, s.b];
+      if (s.inverted) {
+        ab.reverse();
+      }
+      ab = ab.map(v => tr.apply(v).data());
+      path.push({TYPE: CURVE_TYPES.SEGMENT, a: ab[0], b: ab[1]});
+    }
+  });
+  return path;
+}
+
+export function readSketch(face, request, sketcher) {
+  let sketch = sketcher.readSketch(face.id);
+  if (!sketch) throw 'illegal state';
+  return sketch.fetchContours().map(c => readSketchContour(c, face));
+}
+
+export function shellsToPointers(shells) {
+  return shells.filter(managedByE0).map(m => m.brepShell.data.externals.ptr);
+}
+
+export function writeCsys(csys, swapToY) {
+  return {
+    origin: csys.origin.data(),
+    normal: (swapToY ? csys.y : csys.z).data(),
+    xDir: csys.x.data()
+  };
+}
diff --git a/web/app/cad/craft/e0/craftMethods.js b/web/app/cad/craft/e0/craftMethods.js
new file mode 100644
index 00000000..73b02608
--- /dev/null
+++ b/web/app/cad/craft/e0/craftMethods.js
@@ -0,0 +1,147 @@
+import {
+  BOOLEAN_TYPES, DEFLECTION, E0_TOLERANCE, managedByE0, readShellData, readSketch, readSketchContour, shellsToPointers,
+  singleShellRespone,
+  writeCsys
+} from './common';
+import {callEngine} from './interact';
+import {resolveExtrudeVector} from '../cutExtrude/cutExtrude';
+
+export function boolean({type, operandsA, operandsB}) {
+  let engineParams = {
+    type: BOOLEAN_TYPES[type],
+    operandsA: shellsToPointers(operandsA),
+    operandsB: shellsToPointers(operandsB),
+    tolerance: E0_TOLERANCE,
+    deflection: DEFLECTION,
+  };
+  let data = callEngine(engineParams, Module._SPI_boolean);
+  let consumed = [...operandsA, ...operandsB];
+  return {
+    consumed,
+    created: [readShellData(data.result, consumed, operandsA[0].csys)]
+  }
+}
+
+export function createBox(params) {
+  return booleanBasedOperation({
+    csys: writeCsys(params.csys),
+    dx: params.width,
+    dy: params.height,
+    dz: params.depth
+  }, params, Module._SPI_box);
+}
+
+export function createTorus(params) {
+  return booleanBasedOperation({
+    csys: writeCsys(params.csys),
+    r1: params.radius,
+    r2: params.tube
+  }, params, Module._SPI_torus);
+}
+
+export function createCone(params) {
+  return booleanBasedOperation({
+    csys: writeCsys(params.csys, true),
+    r1: params.radius,
+    r2: params.frustum,
+    h: params.height
+  }, params, Module._SPI_cone);
+}
+
+export function createCylinder(params) {
+  return booleanBasedOperation({
+    csys: writeCsys(params.csys, true),
+    r: params.radius,
+    h: params.height,
+  }, params, Module._SPI_cylinder);
+}
+
+export function createSphere(params) {
+  return booleanBasedOperation({
+    csys: writeCsys(params.csys),
+    r: params.radius,
+  }, params, Module._SPI_sphere);
+}
+
+function booleanBasedOperation(engineParams, params, impl) {
+  engineParams.deflection = DEFLECTION;
+  if (params.boolean && BOOLEAN_TYPES[params.boolean.type] > 0) {
+    engineParams.boolean = {
+      type: BOOLEAN_TYPES[params.boolean.type],
+      operands: shellsToPointers(params.boolean.operands),
+      tolerance: E0_TOLERANCE,
+    }
+  }
+  let data = callEngine(engineParams, impl);
+  let consumed = [];
+  if (params.boolean) {
+    data.consumed.forEach(ptr => {
+      let model = params.boolean.operands.find(m => managedByE0(m) && m.brepShell.data.externals.ptr === ptr);
+      if (model) {
+        consumed.push(model);
+      }
+    });
+  }
+  return {
+    consumed,
+    created: data.created.map(shape => readShellData(shape, consumed, params.csys))
+  }
+}
+
+function cutExtrude(isCut, request) {
+
+  function createExtrudeCommand(request, {cadRegistry, sketcher}, invert) {
+    const face = cadRegistry.findFace(request.face);
+    const paths = readSketch(face, request, sketcher);
+
+    return {
+      face,
+      request: {
+        vector: resolveExtrudeVector(cadRegistry, face, request, !invert).data(),
+        sketch: paths,
+        tolerance: E0_TOLERANCE,
+        deflection: DEFLECTION
+      }
+    };
+  }
+
+  let {request: engineReq, face} = createExtrudeCommand(request, services, isCut);
+  if (managedByE0(face.shell)) {
+    engineReq.boolean = {
+      type: isCut ? BOOLEAN_TYPES.SUBTRACT : BOOLEAN_TYPES.UNION,
+      operand: face.shell.brepShell.data.externals.ptr
+    }
+  }
+
+  let data = callEngine(engineReq, Module._SPI_extrude);
+
+  return singleShellRespone(face.shell, data);
+}
+
+export function cut(params) {
+  return cutExtrude(true, params);
+}
+
+export function extrude(params) {
+  return cutExtrude(false, params);
+}
+
+const mapLoftParams = params => ({
+  sections: params.sections.map(sec => readSketchContour(sec.contour, sec.face)),
+  tolerance: E0_TOLERANCE,
+  deflection: DEFLECTION
+});
+
+export function loftPreview(params) {
+  return callEngine(mapLoftParams(params), Module._SPI_loftPreview);
+}
+
+export function loft(params) {
+  let result = callEngine(mapLoftParams(params), Module._SPI_loftPreview);
+  throw 'unsupported';
+  // let consumed = [...operandsA, ...operandsB];
+  // return {
+  //   consumed,
+  //   created: [readShellData(data.result, consumed, operandsA[0].csys)]
+  // }
+}
diff --git a/web/app/cad/craft/e0/e0Plugin.js b/web/app/cad/craft/e0/e0Plugin.js
index f83e86de..bba07171 100644
--- a/web/app/cad/craft/e0/e0Plugin.js
+++ b/web/app/cad/craft/e0/e0Plugin.js
@@ -1,315 +1,19 @@
 /**
  * This is an internal alternative to native engine. It overrides basic 3d part design operations
  */
-import {resolveExtrudeVector} from '../cutExtrude/cutExtrude';
-
-let BOOLEAN_TYPES = {
-  UNION : 1,
-  SUBTRACT: 2,
-  INTERSECT: 3
-};
-
-let CURVE_TYPES = {
-  SEGMENT: 1,
-  B_SPLINE: 2,
-  CIRCLE: 3,
-  ARC: 4
-};
-
-const DEFLECTION = 2;
-const TOLERANCE = 1e-3;
+import * as craftMethods from './craftMethods';
+import operationHandler from './operationHandler';
 
 export function activate(ctx) {
 
   loadWasm(ctx);
   
   ctx.services.operation.handlers.push(operationHandler);
-  function booleanBasedOperation(engineParams, params, impl) {
-    engineParams.deflection = DEFLECTION;
-    if (params.boolean && BOOLEAN_TYPES[params.boolean.type] > 0) {
-      engineParams.boolean = {
-        type: BOOLEAN_TYPES[params.boolean.type],
-        operands: shellsToPointers(params.boolean.operands),
-        tolerance: TOLERANCE,
-      }
-    }
-    let data = callEngine(engineParams, impl);
-    let consumed = [];
-    if (params.boolean) {
-      data.consumed.forEach(ptr => {
-        let model = params.boolean.operands.find(m => managedByE0(m) && m.brepShell.data.externals.ptr === ptr);
-        if (model) {
-          consumed.push(model);
-        }
-      });
-    }
-    return {
-      consumed,
-      created: data.created.map(shape => readShellData(shape, consumed, params.csys))
-    }
-  }
   ctx.services.craftEngine = {
-    createBox: function(params) {
-      return booleanBasedOperation({
-        csys: writeCsys(params.csys),
-        dx: params.width,
-        dy: params.height,
-        dz: params.depth
-      }, params, Module._SPI_box);
-    },
-    createTorus: function(params) {
-      return booleanBasedOperation({
-        csys: writeCsys(params.csys),
-        r1: params.radius,
-        r2: params.tube
-      }, params, Module._SPI_torus);
-    },
-    createCone: function(params) {
-      return booleanBasedOperation({
-        csys: writeCsys(params.csys, true),
-        r1: params.radius,
-        r2: params.frustum,
-        h: params.height
-      }, params, Module._SPI_cone);
-    },
-    createCylinder: function(params) {
-      return booleanBasedOperation({
-        csys: writeCsys(params.csys, true),
-        r: params.radius,
-        h: params.height,
-      }, params, Module._SPI_cylinder);
-    },
-    createSphere: function(params) {
-      return booleanBasedOperation({
-        csys: writeCsys(params.csys),
-        r: params.radius,
-      }, params, Module._SPI_sphere);
-    },
-    boolean: function({type, operandsA, operandsB}) {
-      let engineParams = {
-        type: BOOLEAN_TYPES[type],
-        operandsA: shellsToPointers(operandsA),
-        operandsB: shellsToPointers(operandsB),
-        tolerance: TOLERANCE,
-        deflection: DEFLECTION,
-      };
-      let data = callEngine(engineParams, Module._SPI_boolean);
-      let consumed = [...operandsA, ...operandsB];
-      return {
-        consumed,
-        created: [readShellData(data.result, consumed, operandsA[0].csys)]
-      }
-    },
-    loft: function(params) {
-      let engineParams = {
-        sections: params.sections.map(sec => readSketchContour(sec.contour, sec.face)),
-        preview: params.preview,
-        tolerance: TOLERANCE,
-        deflection: DEFLECTION,
-      };
-      let data = callEngine(engineParams, Module._SPI_loft);
-      if (params.preview) {
-        return data;
-      }
-      throw 'unsupported';
-      // let consumed = [...operandsA, ...operandsB];
-      // return {
-      //   consumed,
-      //   created: [readShellData(data.result, consumed, operandsA[0].csys)]
-      // }
-    }
+    ...craftMethods
   }
 }
 
-function shellsToPointers(shells) {
-  return shells.filter(managedByE0).map(m => m.brepShell.data.externals.ptr);
-}
-
-function writeCsys(csys, swapToY) {
-  return {
-    origin: csys.origin.data(),
-    normal: (swapToY ? csys.y : csys.z).data(),
-    xDir: csys.x.data()
-  };
-}
-
-function operationHandler(id, request, services) {
-  switch (id) {
-    case 'CUT':
-    case 'EXTRUDE': {
-
-      let isCut = id === 'CUT';
-      let {request: engineReq, face} = createExtrudeCommand(request, services, isCut);
-      if (managedByE0(face.shell)) {
-        engineReq.boolean = {
-          type: isCut ? BOOLEAN_TYPES.SUBTRACT : BOOLEAN_TYPES.UNION,
-          operand: face.shell.brepShell.data.externals.ptr
-        }
-      }
-
-      let data = callEngine(engineReq, Module._SPI_extrude);
-
-      return singleShellRespone(face.shell, data);
-    }
-    case 'REVOLVE': {
-      let {request: engineReq, face} = createRevolveCommand(request, services);
-      let data = callEngine(engineReq, Module._SPI_revolve);
-      return singleShellRespone(face.shell, data);
-    }
-    case 'FILLET': {
-      let edge = services.cadRegistry.findEdge(request.edges[0]);
-      let engineReq = {
-        deflection: DEFLECTION,
-        solid: edge.shell.brepShell.data.externals.ptr,
-        edges: request.edges.map(e => ({
-          edge: services.cadRegistry.findEdge(e).brepEdge.data.externals.ptr,
-          thickness: request.thickness
-        }))
-      };
-
-      let data = callEngine(engineReq, Module._SPI_fillet);
-      return singleShellRespone(edge.shell, data);
-    }
-  }
-}
-
-function singleShellRespone(oldShell, newShellData) {
-  if (newShellData.error) {
-    throw 'operation failed';
-  }
-
-  let consumed = [oldShell];
-  let created = readShellData(newShellData, consumed, oldShell.csys);
-  return {
-    consumed: consumed,
-    created: [created]
-  };
-}
-
-function readShellData(data, consumed, csys) {
-  let tpi = __CAD_APP.services.tpi;
-  let model = new tpi.scene.readShellEntityFromJson(data, consumed, csys);
-  model.brepShell.data.externals.engine = 'e0';
-  return model;
-}
-
-function managedByE0(mShell) {
-  let externals = mShell.brepShell && mShell.brepShell.data && mShell.brepShell.data.externals;
-  return externals && externals.engine === 'e0';
-}
-
-function readSketchContour(contour, face) {
-  let tr = face.csys.outTransformation;
-  let path = [];
-  contour.segments.forEach(s => {
-    if (s.isCurve) {
-      if (s.constructor.name === 'Circle') {
-        const dir = face.csys.z.data();
-        path.push({TYPE: CURVE_TYPES.CIRCLE, c: tr.apply(s.c).data(), dir, r: s.r});
-      } else if (s.constructor.name === 'Arc') {
-        let a = s.inverted ? s.b : s.a;
-        let b = s.inverted ? s.a : s.b;
-        let tangent = tr._apply(s.c.minus(a))._cross(face.csys.z)._normalize();
-        if (s.inverted) {
-          tangent._negate();
-        }
-        path.push({
-          TYPE: CURVE_TYPES.ARC,
-          a: tr.apply(a).data(),
-          b: tr.apply(b).data(),
-          tangent: tangent.data()
-        });
-      } else {
-        let nurbs = s.toNurbs(face.csys).impl;
-        path.push(Object.assign({TYPE: CURVE_TYPES.B_SPLINE}, nurbs.serialize()));
-      }
-    } else {
-      let ab = [s.a, s.b];
-      if (s.inverted) {
-        ab.reverse();
-      }
-      ab = ab.map(v => tr.apply(v).data());
-      path.push({TYPE: CURVE_TYPES.SEGMENT, a: ab[0], b: ab[1]});
-    }
-  });
-  return path;
-}
-
-function readSketch(face, request, sketcher) {
-  let sketch = sketcher.readSketch(face.id);
-  if (!sketch) throw 'illegal state';
-  return sketch.fetchContours().map(c => readSketchContour(c, face));
-}
-
-function createExtrudeCommand(request, {cadRegistry, sketcher}, invert) {
-  const face = cadRegistry.findFace(request.face);
-  const paths = readSketch(face, request, sketcher);
-  
-  return {
-    face,
-    request: {
-      vector: resolveExtrudeVector(cadRegistry, face, request, !invert).data(),
-      sketch: paths,
-      tolerance: TOLERANCE,
-      deflection: DEFLECTION
-    }
-  };
-}
-
-function createRevolveCommand(request, {cadRegistry, sketcher}) {
-  const face = cadRegistry.findFace(request.face);
-  const paths = readSketch(face, request, sketcher);
-
-  let pivot = cadRegistry.findSketchObject(request.axis).sketchPrimitive;
-  let tr = face.csys.outTransformation;
-  let vec = __CAD_APP.services.tpi.math.vec;
-  let axisOrigin = tr._apply3(pivot.a.data());
-  let axisDir = vec._normalize(vec._sub(tr._apply3(pivot.b.data()), axisOrigin))
-
-  let res = {
-    face,
-    request: {
-      axisOrigin,
-      axisDir,
-      angle: request.angle / 180.0 * Math.PI,
-      sketch: paths,
-      tolerance: TOLERANCE,
-      deflection: DEFLECTION
-    }
-  };
-  if (managedByE0(face.shell) && request.boolean && BOOLEAN_TYPES[request.boolean] > 0) {
-    res.request.boolean = {
-      type: BOOLEAN_TYPES[request.boolean],
-      operand:  face.shell.brepShell.data.externals.ptr 
-    }
-  }
-  return res;
-}
-
-
-function toCString(str) {
-  let buffer = Module._malloc(str.length + 1);
-  writeAsciiToMemory(str, buffer);
-  return buffer;
-}
-
-function callEngine(request, engineFunc) {
-  let toCStringRequest = toCString(JSON.stringify(request));
-  engineFunc(toCStringRequest);
-  Module._free(toCStringRequest);
-  return __E0_ENGINE_EXCHANGE_VAL;
-}
-
-
-let __E0_ENGINE_EXCHANGE_VAL = null;
-window.__E0_ENGINE_EXCHANGE = function(objStr) {
-  __E0_ENGINE_EXCHANGE_VAL = JSON.parse(objStr);
-  // let tpi = __CAD_APP.services.tpi;
-  // let sceneObject = new tpi.scene.UnmanagedSceneSolid(data, 'SOLID');
-  // tpi.addOnScene(sceneObject);
-  // __DEBUG__.AddTessDump(obj);
-};
-
 function instantiateEngine(importObject, callback) {
   const url = '/wasm/e0/main.wasm';
   WebAssembly.instantiateStreaming(fetch(url), importObject).then(results => {
diff --git a/web/app/cad/craft/e0/interact.js b/web/app/cad/craft/e0/interact.js
new file mode 100644
index 00000000..059ea675
--- /dev/null
+++ b/web/app/cad/craft/e0/interact.js
@@ -0,0 +1,23 @@
+
+export function toCString(str) {
+  let buffer = Module._malloc(str.length + 1);
+  writeAsciiToMemory(str, buffer);
+  return buffer;
+}
+
+export function callEngine(request, engineFunc) {
+  let toCStringRequest = toCString(JSON.stringify(request));
+  engineFunc(toCStringRequest);
+  Module._free(toCStringRequest);
+  return __E0_ENGINE_EXCHANGE_VAL;
+}
+
+
+let __E0_ENGINE_EXCHANGE_VAL = null;
+window.__E0_ENGINE_EXCHANGE = function(objStr) {
+  __E0_ENGINE_EXCHANGE_VAL = JSON.parse(objStr);
+  // let tpi = __CAD_APP.services.tpi;
+  // let sceneObject = new tpi.scene.UnmanagedSceneSolid(data, 'SOLID');
+  // tpi.addOnScene(sceneObject);
+  // __DEBUG__.AddTessDump(obj);
+};
diff --git a/web/app/cad/craft/e0/operationHandler.js b/web/app/cad/craft/e0/operationHandler.js
new file mode 100644
index 00000000..75e3fd8f
--- /dev/null
+++ b/web/app/cad/craft/e0/operationHandler.js
@@ -0,0 +1,87 @@
+import {BOOLEAN_TYPES, DEFLECTION, E0_TOLERANCE, managedByE0, readSketch, singleShellRespone} from './common';
+import {callEngine} from './interact';
+import {resolveExtrudeVector} from '../cutExtrude/cutExtrude';
+
+export default function operationHandler(id, request, services) {
+  switch (id) {
+    case 'CUT':
+    case 'EXTRUDE': {
+      let isCut = id === 'CUT';
+      let {request: engineReq, face} = createExtrudeCommand(request, services, isCut);
+      if (managedByE0(face.shell)) {
+        engineReq.boolean = {
+          type: isCut ? BOOLEAN_TYPES.SUBTRACT : BOOLEAN_TYPES.UNION,
+          operand: face.shell.brepShell.data.externals.ptr
+        }
+      }
+
+      let data = callEngine(engineReq, Module._SPI_extrude);
+
+      return singleShellRespone(face.shell, data);
+    }
+    case 'REVOLVE': {
+      let {request: engineReq, face} = createRevolveCommand(request, services);
+      let data = callEngine(engineReq, Module._SPI_revolve);
+      return singleShellRespone(face.shell, data);
+    }
+    case 'FILLET': {
+      let edge = services.cadRegistry.findEdge(request.edges[0]);
+      let engineReq = {
+        deflection: DEFLECTION,
+        solid: edge.shell.brepShell.data.externals.ptr,
+        edges: request.edges.map(e => ({
+          edge: services.cadRegistry.findEdge(e).brepEdge.data.externals.ptr,
+          thickness: request.thickness
+        }))
+      };
+
+      let data = callEngine(engineReq, Module._SPI_fillet);
+      return singleShellRespone(edge.shell, data);
+    }
+  }
+}
+
+function createExtrudeCommand(request, {cadRegistry, sketcher}, invert) {
+  const face = cadRegistry.findFace(request.face);
+  const paths = readSketch(face, request, sketcher);
+
+  return {
+    face,
+    request: {
+      vector: resolveExtrudeVector(cadRegistry, face, request, !invert).data(),
+      sketch: paths,
+      tolerance: E0_TOLERANCE,
+      deflection: DEFLECTION
+    }
+  };
+}
+
+function createRevolveCommand(request, {cadRegistry, sketcher}) {
+  const face = cadRegistry.findFace(request.face);
+  const paths = readSketch(face, request, sketcher);
+
+  let pivot = cadRegistry.findSketchObject(request.axis).sketchPrimitive;
+  let tr = face.csys.outTransformation;
+  let vec = __CAD_APP.services.tpi.math.vec;
+  let axisOrigin = tr._apply3(pivot.a.data());
+  let axisDir = vec._normalize(vec._sub(tr._apply3(pivot.b.data()), axisOrigin))
+
+  let res = {
+    face,
+    request: {
+      axisOrigin,
+      axisDir,
+      angle: request.angle / 180.0 * Math.PI,
+      sketch: paths,
+      tolerance: E0_TOLERANCE,
+      deflection: DEFLECTION
+    }
+  };
+  if (managedByE0(face.shell) && request.boolean && BOOLEAN_TYPES[request.boolean] > 0) {
+    res.request.boolean = {
+      type: BOOLEAN_TYPES[request.boolean],
+      operand:  face.shell.brepShell.data.externals.ptr
+    }
+  }
+  return res;
+}
diff --git a/web/app/cad/craft/loft/loftPreviewer.js b/web/app/cad/craft/loft/loftPreviewer.js
index 7652d303..0a04317b 100644
--- a/web/app/cad/craft/loft/loftPreviewer.js
+++ b/web/app/cad/craft/loft/loftPreviewer.js
@@ -2,7 +2,7 @@ import {createSmoothMeshGeometryFromData} from '../../../../../modules/scene/geo
 
 export function loftPreviewGeomProvider(params, services) {
 
-  const tessInfo = services.craftEngine.loft({
+  const tessInfo = services.craftEngine.loftPreview({
     sections: params.sections.map(services.cadRegistry.findLoop),
     preview: true
   });