feat(All):Initial

2025-10-04 23:36:07 +08:00
commit 2b4e5d2668
1321 changed files with 415958 additions and 0 deletions
@@ -0,0 +1,88 @@
+
+import DxfArrayScanner, { IGroup } from '../DxfArrayScanner';
+import * as helpers from '../ParseHelpers'
+
+import IGeometry, { IEntity, IPoint } from './geomtry';
+
+export interface I3DfaceEntity extends IEntity {
+	shape: boolean;
+	hasContinuousLinetypePattern: boolean;
+	vertices: IPoint[];
+}
+
+export default class ThreeDface implements IGeometry {
+	public ForEntityName = '3DFACE' as const;
+	public parseEntity(scanner: DxfArrayScanner, curr: IGroup) {
+		const entity = { type: curr.value as string, vertices: [] as IPoint[] } as I3DfaceEntity;
+		curr = scanner.next();
+		while (!scanner.isEOF()) {
+			if (curr.code === 0) break;
+			switch (curr.code) {
+				case 70: // 1 = Closed shape, 128 = plinegen?, 0 = default
+					entity.shape = (((curr.value as number) & 1) === 1);
+					entity.hasContinuousLinetypePattern = (((curr.value as number) & 128) === 128);
+					break;
+				case 10: // X coordinate of point
+					entity.vertices = parse3dFaceVertices(scanner, curr);
+					curr = scanner.lastReadGroup as IGroup;
+					break;
+				default:
+					helpers.checkCommonEntityProperties(entity, curr, scanner);
+					break;
+			}
+			curr = scanner.next();
+		}
+		return entity;
+	}
+}
+
+function parse3dFaceVertices(scanner:DxfArrayScanner, curr:IGroup) {
+	var vertices:IPoint[] = [];
+	var vertexIsStarted = false;
+	var vertexIsFinished = false;
+	var verticesPer3dFace = 4; // there can be up to four vertices per face, although 3 is most used for TIN
+
+	for (let i = 0; i <= verticesPer3dFace; i++) {
+		var vertex = {} as IPoint;
+		while (!scanner.isEOF()) {
+			if (curr.code === 0 || vertexIsFinished) break;
+
+			switch (curr.code) {
+				case 10: // X0
+				case 11: // X1
+				case 12: // X2
+				case 13: // X3
+					if (vertexIsStarted) {
+						vertexIsFinished = true;
+						continue;
+					}
+					vertex.x = curr.value as number;
+					vertexIsStarted = true;
+					break;
+				case 20: // Y
+				case 21:
+				case 22:
+				case 23:
+					vertex.y = curr.value as number;
+					break;
+				case 30: // Z
+				case 31:
+				case 32:
+				case 33:
+					vertex.z = curr.value as number;
+					break;
+				default:
+					// it is possible to have entity codes after the vertices.  
+					// So if code is not accounted for return to entity parser where it might be accounted for
+					return vertices;
+			}
+			curr = scanner.next();
+		}
+		// See https://groups.google.com/forum/#!topic/comp.cad.autocad/9gn8s5O_w6E
+		vertices.push(vertex);
+		vertexIsStarted = false;
+		vertexIsFinished = false;
+	}
+	scanner.rewind();
+	return vertices;
+};