Add blob and fix some issues

frontend/src/scripts/drawing/drawables/drawable-blob.ts

@@ -0,0 +1,26 @@
+import { IDrawable } from './i-drawable';
+import { IDrawableDescriptor } from './i-drawable-descriptor';
+import { settings } from '../settings';
+import { Blob } from '../../shapes/types/blob';
+
+export class DrawableBlob extends Blob implements IDrawable {
+  public static descriptor: IDrawableDescriptor = {
+    uniformName: 'blobs',
+    countMacroName: 'blobCount',
+    shaderCombinationSteps: settings.shaderCombinations.blobSteps,
+  };
+
+  public serializeToUniforms(uniforms: any): void {
+    const uniformName = DrawableBlob.descriptor.uniformName;
+    if (!uniforms.hasOwnProperty(uniformName)) {
+      uniforms[uniformName] = [];
+    }
+
+    uniforms[uniformName].push({
+      headCenter: this.head.center,
+      torsoCenter: this.torso.center,
+      leftFootCenter: this.leftFoot.center,
+      rightFootCenter: this.rightFoot.center,
+    });
+  }
+}