Some refactoring

frontend/src/scripts/graphics/drawables/drawable-tunnel.ts

@@ -0,0 +1,28 @@
+import { mat2d, vec2 } from 'gl-matrix';
+import TunnelShape from '../../shapes/types/tunnel-shape';
+import { settings } from '../settings';
+import { IDrawable } from './i-drawable';
+import { IDrawableDescriptor } from './i-drawable-descriptor';
+
+export class DrawableTunnel extends TunnelShape implements IDrawable {
+  public static descriptor: IDrawableDescriptor = {
+    uniformName: 'lines',
+    countMacroName: 'lineCount',
+    shaderCombinationSteps: settings.shaderCombinations.lineSteps,
+    empty: new DrawableTunnel(vec2.fromValues(0, 0), vec2.fromValues(0, 0), 0, 0),
+  };
+
+  public serializeToUniforms(uniforms: any, scale: number, transform: mat2d): void {
+    const { uniformName } = DrawableTunnel.descriptor;
+    if (!Object.prototype.hasOwnProperty.call(uniforms, uniformName)) {
+      uniforms[uniformName] = [];
+    }
+
+    uniforms[uniformName].push({
+      from: vec2.transformMat2d(vec2.create(), this.from, transform),
+      toFromDelta: vec2.scale(vec2.create(), this.toFromDelta, scale),
+      fromRadius: this.fromRadius * scale,
+      toRadius: this.toRadius * scale,
+    });
+  }
+}