dxf-viewer - npm Package Compare versions

Comparing version 1.0.4 to 1.0.5

package.json

 {
   "name": "dxf-viewer",
-  "version": "1.0.4",
+  "version": "1.0.5",
   "description": "JavaScript DXF file viewer",
@@ -5,0 +5,0 @@ "main": "src/index.js",

src/DxfScene.js

@@ -585,4 +585,6 @@ import {DynamicBuffer, NativeType} from "./DynamicBuffer"
             const nestedCtx = blockCtx.NestedBlockContext(block, entity)
-            for (const entity of block.data.entities) {
-                this._ProcessDxfEntity(entity, nestedCtx)
+            if (block.data.entities) {
+                for (const entity of block.data.entities) {
+                    this._ProcessDxfEntity(entity, nestedCtx)
+                }
             }
@@ -661,2 +663,32 @@ return
 
+    /** Mirror entity vertices if necessary in case of extrusionDirection with negative Z specified.
+     *
+     * @param entity Entity to check.
+     * @param vertices {?{x,y}[]} Vertices array to use instead of entity vertices attribute.
+     * @return {{x,y}[]} Vertices array with mirrored X if necessary. All attributes preserved.
+     */
+    _MirrorEntityVertices(entity, vertices = null) {
+        if (!entity.extrusionDirection || entity.extrusionDirection.z >= 0) {
+            return vertices ?? entity.vertices
+        }
+        if (!vertices || vertices === entity.vertices) {
+            vertices = entity.vertices.slice()
+        }
+        const n = vertices.length
+        for (let i = 0; i < n; i++) {
+            const v = vertices[i]
+            const _v = {x: -v.x}
+            for (const propName in v) {
+                if (!v.hasOwnProperty(propName)) {
+                    continue
+                }
+                if (propName !== "x") {
+                    _v[propName] = v[propName]
+                }
+            }
+            vertices[i] = _v
+        }
+        return vertices
+    }
+
     *_DecomposePolyline(entity, blockCtx = null) {
@@ -674,2 +706,3 @@ let entityVertices, verticesCount
         }
+        entityVertices = this._MirrorEntityVertices(entity, entityVertices)
         const color = this._GetEntityColor(entity, blockCtx)
@@ -1436,5 +1469,14 @@ const layer = this._GetEntityLayer(entity, blockCtx)
         const mInsert = new Matrix3().translate(-this.origin.x, -this.origin.y)
-        mInsert.scale(entity.xScale || 1, entity.yScale || 1)
-        mInsert.rotate(-(entity.rotation || 0) * Math.PI / 180)
-        mInsert.translate(entity.position.x, entity.position.y)
+        let yScale = entity.yScale || 1
+        const xScale = entity.xScale || 1
+        const rotation = -(entity.rotation || 0) * Math.PI / 180
+        let x = entity.position.x
+        const y = entity.position.y
+        if (entity.zScale < 0) {
+            yScale = -yScale
+            x = -x
+        }
+        mInsert.scale(xScale, yScale)
+        mInsert.rotate(rotation)
+        mInsert.translate(x, y)
         if (this.type !== BlockContext.Type.INSTANTIATION) {
@@ -1441,0 +1483,0 @@ return mInsert

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Improved metrics

Total package byte prevSize

245902

increased by0.6%

Lines of code

6488

increased by0.64%

No dependency changes