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Approx_ParametrizationType, BRepFill_TypeOfContact, BRepOffsetAPI_MakeOffsetShape,
BRepOffsetAPI_MakeOffset_1, BRepOffset_Mode, Bnd_Box_1, Extrema_ExtAlgo, Extrema_ExtFlag,
GeomAbs_JoinType, OpenCascadeInstance, TopoDS_Compound, TopoDS_Edge, TopoDS_Face, TopoDS_Shape, TopoDS_Vertex, TopoDS_Wire
} from "../../../bitbybit-dev-occt/bitbybit-dev-occt";
import { VectorHelperService } from "../../api/vector-helper.service";
import * as Inputs from "../../api/inputs/inputs";
import { Base } from "../../api/inputs/base-inputs";
import { EnumService } from "./enum.service";
import { EntitiesService } from "./entities.service";
import { ConverterService } from "./converter.service";
import { BooleansService } from "./booleans.service";
import { TransformsService } from "./transforms.service";
import { ShapeGettersService } from "./shape-getters";
import { EdgesService } from "./edges.service";
import { WiresService } from "./wires.service";
import { FacesService } from "./faces.service";
import { ShellsService } from "./shells.service";
export class OperationsService {
constructor(
private readonly occ: OpenCascadeInstance,
private readonly enumService: EnumService,
private readonly entitiesService: EntitiesService,
private readonly converterService: ConverterService,
private readonly booleansService: BooleansService,
private readonly shapeGettersService: ShapeGettersService,
private readonly edgesService: EdgesService,
private readonly transformsService: TransformsService,
private readonly vecHelper: VectorHelperService,
private readonly wiresService: WiresService,
private readonly facesService: FacesService,
private readonly shellsService: ShellsService,
) { }
loftAdvanced(inputs: Inputs.OCCT.LoftAdvancedDto<TopoDS_Wire | TopoDS_Edge>) {
if (inputs.periodic && !inputs.closed) {
throw new Error("Cant construct periodic non closed loft.");
}
const pipe = new this.occ.BRepOffsetAPI_ThruSections(inputs.makeSolid, inputs.straight, inputs.tolerance);
const wires: TopoDS_Wire[] = [];
const vertices: TopoDS_Vertex[] = [];
if (inputs.startVertex) {
const v = this.entitiesService.makeVertex(inputs.startVertex);
pipe.AddVertex(v);
vertices.push(v);
}
if (inputs.closed && !inputs.periodic) {
inputs.shapes.push(inputs.shapes[0]);
} else if (inputs.closed && inputs.periodic) {
const pointsOnCrvs: Inputs.Base.Point3[][] = [];
inputs.shapes.forEach((s: TopoDS_Wire | TopoDS_Edge) => {
Iif (this.enumService.getShapeTypeEnum(s) === Inputs.OCCT.shapeTypeEnum.edge) {
s = this.entitiesService.bRepBuilderAPIMakeWire(s);
}
const pts = this.wiresService.divideWireByParamsToPoints({ shape: s, nrOfDivisions: inputs.nrPeriodicSections, removeStartPoint: false, removeEndPoint: false });
pointsOnCrvs.push(pts);
});
// <= needed due to start and end points that are added
for (let i = 0; i <= inputs.nrPeriodicSections; i++) {
const ptsForPerpWire = pointsOnCrvs.map(p => p[i]);
const periodicWire = this.wiresService.interpolatePoints({ points: ptsForPerpWire, tolerance: inputs.tolerance, periodic: true });
pipe.AddWire(periodicWire);
wires.push(periodicWire);
}
}
if (!inputs.periodic) {
inputs.shapes.forEach((wire) => {
pipe.AddWire(wire);
});
}
const endVertices: TopoDS_Vertex[] = [];
if (inputs.endVertex) {
const v = this.entitiesService.makeVertex(inputs.endVertex);
pipe.AddVertex(v);
endVertices.push(v);
}
Iif (inputs.useSmoothing) {
pipe.SetSmoothing(inputs.useSmoothing);
}
Eif (inputs.maxUDegree) {
pipe.SetMaxDegree(inputs.maxUDegree);
}
let parType: Approx_ParametrizationType | undefined = undefined;
if (inputs.parType === Inputs.OCCT.approxParametrizationTypeEnum.approxChordLength) {
parType = this.occ.Approx_ParametrizationType.Approx_ChordLength as Approx_ParametrizationType;
} else if (inputs.parType === Inputs.OCCT.approxParametrizationTypeEnum.approxCentripetal) {
parType = this.occ.Approx_ParametrizationType.Approx_Centripetal as Approx_ParametrizationType;
} else Eif (inputs.parType === Inputs.OCCT.approxParametrizationTypeEnum.approxIsoParametric) {
parType = this.occ.Approx_ParametrizationType.Approx_IsoParametric as Approx_ParametrizationType;
}
Eif (parType) {
pipe.SetParType(parType);
}
pipe.CheckCompatibility(false);
const pipeShape = pipe.Shape();
const res = this.converterService.getActualTypeOfShape(pipeShape);
pipeShape.delete();
pipe.delete();
wires.forEach(w => w.delete());
vertices.forEach(v => v.delete());
endVertices.forEach(v => v.delete());
return res;
}
closestPointsBetweenTwoShapes(shape1: TopoDS_Shape, shape2: TopoDS_Shape): [Base.Point3, Base.Point3] {
const messageProgress = new this.occ.Message_ProgressRange_1();
const extrema = new this.occ.BRepExtrema_DistShapeShape_2(
shape1,
shape2,
this.occ.Extrema_ExtFlag.Extrema_ExtFlag_MIN as Extrema_ExtFlag,
this.occ.Extrema_ExtAlgo.Extrema_ExtAlgo_Grad as Extrema_ExtAlgo,
messageProgress
);
const messageProgress1 = new this.occ.Message_ProgressRange_1();
extrema.Perform(messageProgress1);
if (extrema.IsDone() && extrema.NbSolution() > 0) {
const closestPoint1 = extrema.PointOnShape1(1);
const closestPoint2 = extrema.PointOnShape2(1);
return [[closestPoint1.X(), closestPoint1.Y(), closestPoint1.Z()], [closestPoint2.X(), closestPoint2.Y(), closestPoint2.Z()]];
} else E{
throw new Error("Closest points could not be found.");
}
}
closestPointsOnShapeFromPoints(inputs: Inputs.OCCT.ClosestPointsOnShapeFromPointsDto<TopoDS_Shape>): Inputs.Base.Point3[] {
const vertexes = inputs.points.map(p => this.entitiesService.makeVertex(p));
const pointsOnShape = vertexes.map(v => this.closestPointsBetweenTwoShapes(v, inputs.shape));
return pointsOnShape.map(p => p[1]);
}
closestPointsOnShapesFromPoints(inputs: Inputs.OCCT.ClosestPointsOnShapesFromPointsDto<TopoDS_Shape>): Inputs.Base.Point3[] {
const vertexes = inputs.points.map(p => this.entitiesService.makeVertex(p));
const result: Inputs.Base.Point3[] = [];
inputs.shapes.forEach((s) => {
const pointsOnShape = vertexes.map(v => this.closestPointsBetweenTwoShapes(v, s));
result.push(...pointsOnShape.map(p => p[1]));
});
return result;
}
distancesToShapeFromPoints(inputs: Inputs.OCCT.ClosestPointsOnShapeFromPointsDto<TopoDS_Shape>): number[] {
const vertexes = inputs.points.map(p => this.entitiesService.makeVertex(p));
const pointsOnShape = vertexes.map(v => this.closestPointsBetweenTwoShapes(v, inputs.shape));
return pointsOnShape.map(p => {
return this.vecHelper.distanceBetweenPoints(p[0], p[1]);
});
}
loft(inputs: Inputs.OCCT.LoftDto<TopoDS_Wire | TopoDS_Edge>) {
const pipe = new this.occ.BRepOffsetAPI_ThruSections(inputs.makeSolid, false, 1.0e-06);
inputs.shapes.forEach((wire) => {
Iif (this.enumService.getShapeTypeEnum(wire) === Inputs.OCCT.shapeTypeEnum.edge) {
wire = this.entitiesService.bRepBuilderAPIMakeWire(wire);
}
pipe.AddWire(wire);
});
pipe.CheckCompatibility(false);
const pipeShape = pipe.Shape();
const res = this.converterService.getActualTypeOfShape(pipeShape);
pipeShape.delete();
pipe.delete();
return res;
}
offset(inputs: Inputs.OCCT.OffsetDto<TopoDS_Shape, TopoDS_Face>) {
return this.offsetAdv({ shape: inputs.shape, face: inputs.face, distance: inputs.distance, tolerance: inputs.tolerance, joinType: Inputs.OCCT.joinTypeEnum.arc, removeIntEdges: false });
}
offsetAdv(inputs: Inputs.OCCT.OffsetAdvancedDto<TopoDS_Shape, TopoDS_Face>) {
Iif (!inputs.tolerance) { inputs.tolerance = 0.1; }
Iif (inputs.distance === 0.0) { return inputs.shape; }
let offset: BRepOffsetAPI_MakeOffset_1 | BRepOffsetAPI_MakeOffsetShape;
const joinType: GeomAbs_JoinType = this.getJoinType(inputs.joinType);
// only this mode is implemented currently, so we cannot expose others...
const brepOffsetMode: BRepOffset_Mode = this.occ.BRepOffset_Mode.BRepOffset_Skin as BRepOffset_Mode;
const wires: TopoDS_Wire[] = [];
if ((this.enumService.getShapeTypeEnum(inputs.shape) === Inputs.OCCT.shapeTypeEnum.wire ||
this.enumService.getShapeTypeEnum(inputs.shape) === Inputs.OCCT.shapeTypeEnum.edge)) {
let wire: TopoDS_Wire;
if (this.enumService.getShapeTypeEnum(inputs.shape) === Inputs.OCCT.shapeTypeEnum.edge) {
wire = this.entitiesService.bRepBuilderAPIMakeWire(inputs.shape);
wires.push(wire);
} else {
wire = inputs.shape;
}
try {
offset = new this.occ.BRepOffsetAPI_MakeOffset_1();
if (inputs.face) {
offset.Init_1(inputs.face, joinType, false);
} else {
offset.Init_2(joinType, false);
}
offset.AddWire(wire);
const messageProgress1 = new this.occ.Message_ProgressRange_1();
offset.Build(messageProgress1);
offset.Perform(inputs.distance, 0.0);
} catch (ex) {
offset = new this.occ.BRepOffsetAPI_MakeOffsetShape();
(offset as BRepOffsetAPI_MakeOffsetShape).PerformByJoin(
wire,
inputs.distance,
inputs.tolerance,
brepOffsetMode,
false,
false,
joinType,
inputs.removeIntEdges,
new this.occ.Message_ProgressRange_1()
);
}
} else {
const shapeToOffset = inputs.shape;
offset = new this.occ.BRepOffsetAPI_MakeOffsetShape();
(offset as BRepOffsetAPI_MakeOffsetShape).PerformByJoin(
shapeToOffset,
inputs.distance,
inputs.tolerance,
brepOffsetMode,
false,
false,
joinType,
inputs.removeIntEdges,
new this.occ.Message_ProgressRange_1()
);
}
const offsetShape = offset.Shape();
const result = this.converterService.getActualTypeOfShape(offsetShape);
offsetShape.delete();
Eif (offset) {
offset.delete();
}
wires.forEach(w => w.delete());
return result;
}
offset3DWire(inputs: Inputs.OCCT.Offset3DWireDto<TopoDS_Wire>): TopoDS_Wire | TopoDS_Edge[] {
const extrusion = this.extrude({
shape: inputs.shape,
direction: inputs.direction,
});
const thickSolid = this.makeThickSolidSimple({
shape: extrusion,
offset: inputs.offset,
});
const nrOfEdges = this.shapeGettersService.getEdges({ shape: inputs.shape }).length;
const predictedNrOfFaces = nrOfEdges * 4 + 2;
const lastFaceIndex = predictedNrOfFaces / 2 - 1;
const firstFaceIndex = lastFaceIndex - nrOfEdges + 1;
const faceEdges: TopoDS_Edge[] = [];
this.shapeGettersService.getFaces({ shape: thickSolid }).forEach((f, index) => {
if (index >= firstFaceIndex && index <= lastFaceIndex) {
const firstEdge = this.shapeGettersService.getEdges({ shape: f })[2];
faceEdges.push(firstEdge);
}
});
let result: TopoDS_Wire | TopoDS_Edge[];
try {
result = this.converterService.combineEdgesAndWiresIntoAWire({ shapes: faceEdges });
result = result.Reversed();
result = this.converterService.getActualTypeOfShape(result);
}
catch {
result = faceEdges;
return result;
}
return result;
}
extrudeShapes(inputs: Inputs.OCCT.ExtrudeShapesDto<TopoDS_Shape>): TopoDS_Shape[] {
return inputs.shapes.map(shape => {
const extruded = this.extrude({ shape, direction: inputs.direction });
const result = this.converterService.getActualTypeOfShape(extruded);
extruded.delete();
return result;
});
}
extrude(inputs: Inputs.OCCT.ExtrudeDto<TopoDS_Shape>): TopoDS_Shape {
const gpVec = new this.occ.gp_Vec_4(inputs.direction[0], inputs.direction[1], inputs.direction[2]);
const prismMaker = new this.occ.BRepPrimAPI_MakePrism_1(
inputs.shape,
gpVec,
false,
true
);
const prismShape = prismMaker.Shape();
prismMaker.delete();
gpVec.delete();
return prismShape;
}
splitShapeWithShapes(inputs: Inputs.OCCT.SplitDto<TopoDS_Shape>): TopoDS_Shape {
const listOfShapes = new this.occ.TopTools_ListOfShape_1();
inputs.shapes.forEach(shape => {
listOfShapes.Append_1(shape);
});
const shape = this.occ.BitByBitDev.BitSplit(inputs.shape, listOfShapes);
return shape;
}
revolve(inputs: Inputs.OCCT.RevolveDto<TopoDS_Shape>) {
Iif (!inputs.angle) { inputs.angle = 360.0; }
Iif (!inputs.direction) { inputs.direction = [0, 0, 1]; }
let result;
if (inputs.angle >= 360.0) {
const pt1 = new this.occ.gp_Pnt_3(0, 0, 0);
const dir = new this.occ.gp_Dir_4(inputs.direction[0], inputs.direction[1], inputs.direction[2]);
const ax1 = new this.occ.gp_Ax1_2(pt1, dir);
const makeRevol = new this.occ.BRepPrimAPI_MakeRevol_2(inputs.shape,
ax1,
inputs.copy);
result = makeRevol.Shape();
makeRevol.delete();
pt1.delete();
dir.delete();
ax1.delete();
} else {
const pt1 = new this.occ.gp_Pnt_3(0, 0, 0);
const dir = new this.occ.gp_Dir_4(inputs.direction[0], inputs.direction[1], inputs.direction[2]);
const ax1 = new this.occ.gp_Ax1_2(pt1, dir);
const makeRevol = new this.occ.BRepPrimAPI_MakeRevol_1(inputs.shape,
ax1,
inputs.angle * 0.0174533, inputs.copy);
result = makeRevol.Shape();
makeRevol.delete();
pt1.delete();
dir.delete();
ax1.delete();
}
const actual = this.converterService.getActualTypeOfShape(result);
result.delete();
return actual;
}
rotatedExtrude(inputs: Inputs.OCCT.RotationExtrudeDto<TopoDS_Shape>) {
const translatedShape = this.transformsService.translate({
translation: [0, inputs.height, 0],
shape: inputs.shape,
});
const upperPolygon = this.transformsService.rotate(
{
axis: [0, 1, 0],
angle: inputs.angle,
shape: translatedShape
});
// Define the straight spine going up the middle of the sweep
const spineWire = this.wiresService.createBSpline({
points: [
[0, 0, 0],
[0, inputs.height, 0]
],
closed: false,
});
// Define the guiding helical auxiliary spine (which controls the rotation)
const steps = 30;
const aspinePoints: Inputs.Base.Point3[] = [];
for (let i = 0; i <= steps; i++) {
const alpha = i / steps;
aspinePoints.push([
20 * Math.sin(alpha * inputs.angle * 0.0174533),
inputs.height * alpha,
20 * Math.cos(alpha * inputs.angle * 0.0174533),
]);
}
const aspineWire = this.wiresService.createBSpline({ points: aspinePoints, closed: false });
// Sweep the face wires along the spine to create the extrusion
const pipe = new this.occ.BRepOffsetAPI_MakePipeShell(spineWire);
pipe.SetMode_5(aspineWire, true, (this.occ.BRepFill_TypeOfContact.BRepFill_NoContact as BRepFill_TypeOfContact));
pipe.Add_1(inputs.shape, false, false);
pipe.Add_1(upperPolygon, false, false);
pipe.Build(new this.occ.Message_ProgressRange_1());
pipe.MakeSolid();
const pipeShape = pipe.Shape();
const result = this.converterService.getActualTypeOfShape(pipeShape);
pipeShape.delete();
pipe.delete();
aspineWire.delete();
spineWire.delete();
upperPolygon.delete();
translatedShape.delete();
return result;
}
pipe(inputs: Inputs.OCCT.ShapeShapesDto<TopoDS_Wire, TopoDS_Shape>) {
const pipe = new this.occ.BRepOffsetAPI_MakePipeShell(inputs.shape);
inputs.shapes.forEach(sh => {
pipe.Add_1(sh, false, false);
});
pipe.Build(new this.occ.Message_ProgressRange_1());
pipe.MakeSolid();
const pipeShape = pipe.Shape();
const result = this.converterService.getActualTypeOfShape(pipeShape);
pipeShape.delete();
pipe.delete();
return result;
}
pipePolylineWireNGon(inputs: Inputs.OCCT.PipePolygonWireNGonDto<TopoDS_Wire>) {
const wire = inputs.shape;
const shapesToPassThrough: TopoDS_Shape[] = [];
const edges = this.shapeGettersService.getEdges({ shape: wire });
edges.forEach((e, index) => {
const edgeStartPt = this.edgesService.startPointOnEdge({ shape: e });
const tangent = this.edgesService.tangentOnEdgeAtParam({ shape: e, param: 0 });
let tangentPreviousEdgeEnd: Inputs.Base.Vector3;
let averageTangentVec = tangent;
if (index > 0 && index < edges.length - 1) {
const previousEdge = edges[index - 1];
tangentPreviousEdgeEnd = this.edgesService.tangentOnEdgeAtParam({ shape: previousEdge, param: 1 });
averageTangentVec = [tangent[0] + tangentPreviousEdgeEnd[0] / 2, tangent[1] + tangentPreviousEdgeEnd[1] / 2, tangent[2] + tangentPreviousEdgeEnd[2] / 2];
}
const ngon = this.wiresService.createNGonWire({ radius: inputs.radius, center: edgeStartPt, direction: averageTangentVec, nrCorners: inputs.nrCorners }) as TopoDS_Wire;
shapesToPassThrough.push(ngon);
if (index === edges.length - 1) {
const edgeEndPt = this.edgesService.endPointOnEdge({ shape: e });
const tangentEndPt = this.edgesService.tangentOnEdgeAtParam({ shape: e, param: 1 });
const ngon = this.wiresService.createNGonWire({ radius: inputs.radius, center: edgeEndPt, direction: tangentEndPt, nrCorners: inputs.nrCorners }) as TopoDS_Wire;
shapesToPassThrough.push(ngon);
}
});
const pipe = new this.occ.BRepOffsetAPI_MakePipeShell(wire);
shapesToPassThrough.forEach(s => {
pipe.Add_1(s, false, false);
});
pipe.Build(new this.occ.Message_ProgressRange_1());
pipe.MakeSolid();
const pipeShape = pipe.Shape();
const result = this.converterService.getActualTypeOfShape(pipeShape);
pipeShape.delete();
pipe.delete();
return result;
}
pipeWireCylindrical(inputs: Inputs.OCCT.PipeWireCylindricalDto<TopoDS_Wire>) {
const wire = inputs.shape;
const shapesToPassThrough: TopoDS_Shape[] = [];
const edges = this.shapeGettersService.getEdges({ shape: wire });
edges.forEach((e, index) => {
const edgeStartPt = this.edgesService.startPointOnEdge({ shape: e });
const tangent = this.edgesService.tangentOnEdgeAtParam({ shape: e, param: 0 });
let tangentPreviousEdgeEnd: Inputs.Base.Vector3;
let averageTangentVec = tangent;
if (index > 0 && index < edges.length - 1) {
const previousEdge = edges[index - 1];
tangentPreviousEdgeEnd = this.edgesService.tangentOnEdgeAtParam({ shape: previousEdge, param: 1 });
averageTangentVec = [tangent[0] + tangentPreviousEdgeEnd[0] / 2, tangent[1] + tangentPreviousEdgeEnd[1] / 2, tangent[2] + tangentPreviousEdgeEnd[2] / 2];
}
const circle = this.entitiesService.createCircle(inputs.radius, edgeStartPt, averageTangentVec, Inputs.OCCT.typeSpecificityEnum.wire) as TopoDS_Wire;
shapesToPassThrough.push(circle);
if (index === edges.length - 1) {
const edgeEndPt = this.edgesService.endPointOnEdge({ shape: e });
const tangentEndPt = this.edgesService.tangentOnEdgeAtParam({ shape: e, param: 1 });
const line = this.entitiesService.createCircle(inputs.radius, edgeEndPt, tangentEndPt, Inputs.OCCT.typeSpecificityEnum.wire) as TopoDS_Wire;
shapesToPassThrough.push(line);
}
});
const pipe = new this.occ.BRepOffsetAPI_MakePipeShell(wire);
shapesToPassThrough.forEach(s => {
pipe.Add_1(s, false, false);
});
pipe.Build(new this.occ.Message_ProgressRange_1());
pipe.MakeSolid();
const pipeShape = pipe.Shape();
const result = this.converterService.getActualTypeOfShape(pipeShape);
pipeShape.delete();
pipe.delete();
return result;
}
pipeWiresCylindrical(inputs: Inputs.OCCT.PipeWiresCylindricalDto<TopoDS_Wire>) {
return inputs.shapes.map(wire => {
return this.pipeWireCylindrical({ shape: wire, radius: inputs.radius });
});
}
makeThickSolidSimple(inputs: Inputs.OCCT.ThisckSolidSimpleDto<TopoDS_Shape>) {
const maker = new this.occ.BRepOffsetAPI_MakeThickSolid();
maker.MakeThickSolidBySimple(inputs.shape, inputs.offset);
maker.Build(new this.occ.Message_ProgressRange_1());
const makerShape = maker.Shape();
const result = this.converterService.getActualTypeOfShape(makerShape);
let res2 = result;
if (inputs.offset > 0) {
const faces = this.shapeGettersService.getFaces({ shape: result });
const revFaces = faces.map(face => face.Reversed());
res2 = this.shellsService.sewFaces({ shapes: revFaces, tolerance: 1e-7 });
result.delete();
}
maker.delete();
makerShape.delete();
return res2;
}
makeThickSolidByJoin(inputs: Inputs.OCCT.ThickSolidByJoinDto<TopoDS_Shape>) {
const facesToRemove = new this.occ.TopTools_ListOfShape_1();
inputs.shapes.forEach(shape => {
facesToRemove.Append_1(shape);
});
const myBody = new this.occ.BRepOffsetAPI_MakeThickSolid();
const jointType: GeomAbs_JoinType = this.getJoinType(inputs.joinType);
myBody.MakeThickSolidByJoin(
inputs.shape,
facesToRemove,
inputs.offset,
inputs.tolerance,
this.occ.BRepOffset_Mode.BRepOffset_Skin as BRepOffset_Mode, // currently a single option
inputs.intersection,
inputs.selfIntersection,
jointType,
inputs.removeIntEdges,
new this.occ.Message_ProgressRange_1());
const makeThick = myBody.Shape();
const result = this.converterService.getActualTypeOfShape(makeThick);
makeThick.delete();
myBody.delete();
facesToRemove.delete();
return result;
}
private getJoinType(jointType: Inputs.OCCT.joinTypeEnum): GeomAbs_JoinType {
let res: GeomAbs_JoinType;
switch (jointType) {
case Inputs.OCCT.joinTypeEnum.arc: {
res = this.occ.GeomAbs_JoinType.GeomAbs_Arc as GeomAbs_JoinType;
break;
}
case Inputs.OCCT.joinTypeEnum.intersection: {
res = this.occ.GeomAbs_JoinType.GeomAbs_Intersection as GeomAbs_JoinType;
break;
}
case Inputs.OCCT.joinTypeEnum.tangent: {
res = this.occ.GeomAbs_JoinType.GeomAbs_Tangent as GeomAbs_JoinType;
break;
}
}
return res;
}
private getBRepOffsetMode(offsetMode: Inputs.OCCT.bRepOffsetModeEnum): BRepOffset_Mode {
let res: BRepOffset_Mode;
switch (offsetMode) {
case Inputs.OCCT.bRepOffsetModeEnum.skin: {
res = this.occ.BRepOffset_Mode.BRepOffset_Skin as BRepOffset_Mode;
break;
}
case Inputs.OCCT.bRepOffsetModeEnum.pipe: {
res = this.occ.BRepOffset_Mode.BRepOffset_Pipe as BRepOffset_Mode;
break;
}
case Inputs.OCCT.bRepOffsetModeEnum.rectoVerso: {
res = this.occ.BRepOffset_Mode.BRepOffset_RectoVerso as BRepOffset_Mode;
break;
}
}
return res;
}
slice(inputs: Inputs.OCCT.SliceDto<TopoDS_Shape>): TopoDS_Compound {
if (inputs.step <= 0) {
throw new Error("Step needs to be positive.");
}
const { bbox, transformedShape } = this.createBBoxAndTransformShape(inputs.shape, inputs.direction);
const intersections = [];
Eif (!bbox.IsThin(0.0001)) {
const { minY, maxY, maxDist } = this.computeBounds(bbox);
const planes = [];
for (let i = minY; i < maxY; i += inputs.step) {
const pq = this.facesService.createSquareFace({ size: maxDist, center: [0, i, 0], direction: [0, 1, 0] });
planes.push(pq);
}
this.applySlices(transformedShape, planes, inputs.direction, intersections);
}
const res = this.converterService.makeCompound({ shapes: intersections });
return res;
}
sliceInStepPattern(inputs: Inputs.OCCT.SliceInStepPatternDto<TopoDS_Shape>): TopoDS_Compound {
if (!inputs.steps || inputs.steps.length === 0) {
throw new Error("Steps must be provided with at elast one positive value");
}
const { bbox, transformedShape } = this.createBBoxAndTransformShape(inputs.shape, inputs.direction);
const intersections = [];
Eif (!bbox.IsThin(0.0001)) {
const { minY, maxY, maxDist } = this.computeBounds(bbox);
const planes = [];
let index = 0;
for (let i = minY; i < maxY; i += inputs.steps[index]) {
const pq = this.facesService.createSquareFace({ size: maxDist, center: [0, i, 0], direction: [0, 1, 0] });
planes.push(pq);
if (inputs.steps[index + 1] === undefined) {
index = 0;
} else {
index++;
}
}
this.applySlices(transformedShape, planes, inputs.direction, intersections);
}
const res = this.converterService.makeCompound({ shapes: intersections });
return res;
}
private createBBoxAndTransformShape(shape: TopoDS_Shape, direction: Inputs.Base.Vector3) {
// we orient the given shape to the reverse direction of sections so that slicing
// would always happen in flat bbox aligned orientation
// after algorithm computes, we turn all intersections to original shape so that it would match a given shape.
// const fromDir
const transformedShape = this.transformsService.align({
shape,
fromOrigin: [0, 0, 0],
fromDirection: direction,
toOrigin: [0, 0, 0],
toDirection: [0, 1, 0],
});
const bbox = new this.occ.Bnd_Box_1();
this.occ.BRepBndLib.Add(transformedShape, bbox, false);
return { bbox, transformedShape };
}
private computeBounds(bbox: Bnd_Box_1) {
const cornerMin = bbox.CornerMin();
const cornerMax = bbox.CornerMax();
const minY = cornerMin.Y();
const maxY = cornerMax.Y();
const minX = cornerMin.X();
const maxX = cornerMax.X();
const minZ = cornerMin.Z();
const maxZ = cornerMax.Z();
const distX = maxX - minX;
const distZ = maxZ - minZ;
const percentage = 1.2;
let maxDist = distX >= distZ ? distX : distZ;
maxDist *= percentage;
return { minY, maxY, maxDist };
}
private applySlices(transformedShape: TopoDS_Shape, planes: any[], direction: Inputs.Base.Vector3, intersections: any[]) {
const shapesToSlice = [];
if (this.enumService.getShapeTypeEnum(transformedShape) === Inputs.OCCT.shapeTypeEnum.solid) {
shapesToSlice.push(transformedShape);
} else {
const solids = this.shapeGettersService.getSolids({ shape: transformedShape });
shapesToSlice.push(...solids);
}
if (shapesToSlice.length === 0) {
throw new Error("No solids found to slice.");
}
shapesToSlice.forEach(s => {
const intInputs = new Inputs.OCCT.IntersectionDto<TopoDS_Shape>();
intInputs.keepEdges = true;
intInputs.shapes = [s];
const compound = this.converterService.makeCompound({ shapes: planes });
intInputs.shapes.push(compound);
const ints = this.booleansService.intersection(intInputs);
ints.forEach(int => {
Eif (int && !int.IsNull()) {
const transformedInt = this.transformsService.align({
shape: int,
fromOrigin: [0, 0, 0],
fromDirection: [0, 1, 0],
toOrigin: [0, 0, 0],
toDirection: direction,
});
intersections.push(transformedInt);
}
});
});
}
}
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