prep for service worker

folk-systems · Dec 1, 2024 · a58343a · a58343a
1 parent 0f3ee9f
commit a58343a
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Showing 2 changed files with 44 additions and 34 deletions.
diff --git a/src/distanceField/distance-field.ts b/src/distanceField/distance-field.ts
@@ -68,29 +68,10 @@ export class DistanceField extends HTMLElement {
   }
 
   private renderDistanceField() {
-    const imageData = this.offscreenCtx.getImageData(0, 0, this.resolution, this.resolution);
-
-    for (let row = 0; row < this.resolution; row++) {
-      for (let col = 0; col < this.resolution; col++) {
-        const index = (col * this.resolution + row) * 4;
-        const distance = this.fields.getDistance(row, col);
-        const color = this.fields.getColor(row, col);
-
-        const maxDistance = 10;
-        const normalizedDistance = Math.sqrt(distance) / maxDistance;
-        const baseColor = {
-          r: (color * 7) % 256,
-          g: (color * 13) % 256,
-          b: (color * 19) % 256,
-        };
-
-        imageData.data[index] = baseColor.r * (1 - normalizedDistance);
-        imageData.data[index + 1] = baseColor.g * (1 - normalizedDistance);
-        imageData.data[index + 2] = baseColor.b * (1 - normalizedDistance);
-        imageData.data[index + 3] = 255;
-      }
-    }
+    // Get the computed ImageData from Fields
+    const imageData = this.fields.generateImageData();
 
+    // Put the ImageData onto the offscreen canvas
     this.offscreenCtx.putImageData(imageData, 0, 0);
 
     // Draw scaled version to main canvas
@@ -164,7 +145,8 @@ export class DistanceField extends HTMLElement {
 
   handleGeometryUpdate = (event: Event) => {
     const geometry = event.target as HTMLElement;
-    const index = Array.from(document.querySelectorAll('fc-geometry')).indexOf(geometry as FolkGeometry);
+    // TODO: store as array from getgo
+    const index = Array.from(this.geometries).indexOf(geometry as FolkGeometry);
     if (index === -1) return;
 
     const rect = geometry.getBoundingClientRect();
@@ -176,16 +158,15 @@ export class DistanceField extends HTMLElement {
     ];
 
     if (index < this.fields.shapes.length) {
-      this.updateShape(index, points);
+      this.fields.updateShape(index, this.transformPoints(points));
     } else {
-      this.addShape(points);
+      this.fields.addShape(this.transformPoints(points));
     }
-  };
 
-  updateShape(index: number, points: Vector2[]) {
-    // Transform each point from screen coordinates to field coordinates
-    const transformedPoints = points.map((point) => this.transformToFieldCoordinates(point));
-    this.fields.updateShape(index, transformedPoints);
     this.renderDistanceField();
+  };
+
+  private transformPoints(points: Vector2[]): Vector2[] {
+    return points.map((point) => this.transformToFieldCoordinates(point));
   }
 }
diff --git a/src/distanceField/fields.ts b/src/distanceField/fields.ts
@@ -39,11 +39,10 @@ export class Fields {
     return this.colorField[x][y];
   }
 
-  addShape(points: Vector2[]) {
-    const color = Math.floor(Math.random() * 255);
-    this.shapes.push({ points, color });
+  addShape(points: Vector2[], color?: number) {
+    const shapeColor = color ?? Math.floor(Math.random() * 255);
+    this.shapes.push({ points, color: shapeColor });
     this.updateFields();
-    console.log(this.shapes);
   }
 
   removeShape(index: number) {
@@ -245,4 +244,34 @@ export class Fields {
       this.updateFields();
     }
   }
+
+  /**
+   * Generates ImageData for rendering, encapsulating all computational logic.
+   */
+  public generateImageData(): ImageData {
+    const imageData = new ImageData(this.resolution, this.resolution);
+
+    for (let row = 0; row < this.resolution; row++) {
+      for (let col = 0; col < this.resolution; col++) {
+        const index = (col * this.resolution + row) * 4;
+        const distance = this.getDistance(row, col);
+        const color = this.getColor(row, col);
+
+        const maxDistance = 10;
+        const normalizedDistance = Math.sqrt(distance) / maxDistance;
+        const baseColor = {
+          r: (color * 7) % 256,
+          g: (color * 13) % 256,
+          b: (color * 19) % 256,
+        };
+
+        imageData.data[index] = baseColor.r * (1 - normalizedDistance);
+        imageData.data[index + 1] = baseColor.g * (1 - normalizedDistance);
+        imageData.data[index + 2] = baseColor.b * (1 - normalizedDistance);
+        imageData.data[index + 3] = 255;
+      }
+    }
+
+    return imageData;
+  }
 }