Refactor shapes

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

@@ -0,0 +1,26 @@
+import { IDrawable } from './i-drawable';
+import { TunnelShape } from '../../shapes/types/tunnel-shape';
+import { IDrawableDescriptor } from './i-drawable-descriptor';
+import { settings } from '../settings';
+
+export class DrawableTunnel extends TunnelShape implements IDrawable {
+  public static descriptor: IDrawableDescriptor = {
+    uniformName: 'lines',
+    countMacroName: 'lineCount',
+    shaderCombinationSteps: settings.shaderCombinations.lineSteps,
+  };
+
+  public serializeToUniforms(uniforms: any): void {
+    const uniformName = DrawableTunnel.descriptor.uniformName;
+    if (!uniforms.hasOwnProperty(uniformName)) {
+      uniforms[uniformName] = [];
+    }
+
+    uniforms[uniformName].push({
+      from: this.from,
+      toFromDelta: this.toFromDelta,
+      fromRadius: this.fromRadius,
+      toRadius: this.toRadius,
+    });
+  }
+}

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

@@ -1,11 +1,6 @@
 import { vec2 } from 'gl-matrix';
-import { ImmutableBoundingBox } from '../../physics/containers/immutable-bounding-box';
-import { GameObject } from '../../objects/game-object';
 
 export interface IDrawable {
-  serializeToUniforms(uniforms: any): void;
   distance(target: vec2): number;
-  minimumDistance(target: vec2): number;
-  readonly owner: GameObject;
-  readonly boundingBox: ImmutableBoundingBox;
+  serializeToUniforms(uniforms: any): void;
 }

frontend/src/scripts/drawing/drawables/lights/circle-light.ts

@@ -1,6 +1,5 @@
 import { vec2, vec3 } from 'gl-matrix';
 import { GameObject } from '../../../objects/game-object';
-import { ImmutableBoundingBox } from '../../../physics/containers/immutable-bounding-box';
 import { settings } from '../../settings';
 import { IDrawableDescriptor } from '../i-drawable-descriptor';
 import { ILight } from './i-light';
@@ -20,24 +19,18 @@ export class CircleLight implements ILight {
     public lightness: number
   ) {}
 
-  boundingBox: ImmutableBoundingBox;
-
   public distance(target: vec2): number {
     return 0;
   }
 
-  public minimumDistance(target: vec2): number {
-    return 0;
-  }
-
   public serializeToUniforms(uniforms: any): void {
-    const listName = CircleLight.descriptor.uniformName;
+    const uniformName = CircleLight.descriptor.uniformName;
 
-    if (!uniforms.hasOwnProperty(listName)) {
-      uniforms[listName] = [];
+    if (!uniforms.hasOwnProperty(uniformName)) {
+      uniforms[uniformName] = [];
     }
 
-    uniforms[listName].push({
+    uniforms[uniformName].push({
       center: this.center,
       radius: this.radius,
       value: this.value,

frontend/src/scripts/drawing/drawables/lights/i-light.ts

@@ -1,3 +1,4 @@
+import { vec2 } from 'gl-matrix';
 import { IDrawable } from '../i-drawable';
 
 export interface ILight extends IDrawable {}

frontend/src/scripts/drawing/drawables/lights/point-light.ts

@@ -2,7 +2,6 @@ import { ILight } from './i-light';
 import { vec2, vec3 } from 'gl-matrix';
 import { IDrawableDescriptor } from '../i-drawable-descriptor';
 import { settings } from '../../settings';
-import { ImmutableBoundingBox } from '../../../physics/containers/immutable-bounding-box';
 import { GameObject } from '../../../objects/game-object';
 
 export class PointLight implements ILight {
@@ -20,16 +19,10 @@ export class PointLight implements ILight {
     public lightness: number
   ) {}
 
-  boundingBox: ImmutableBoundingBox;
-
   public distance(target: vec2): number {
     return vec2.distance(this.center, target) - this.radius;
   }
 
-  public minimumDistance(target: vec2): number {
-    return vec2.distance(this.center, target) - this.radius;
-  }
-
   public serializeToUniforms(uniforms: any): void {
     const listName = PointLight.descriptor.uniformName;
 

frontend/src/scripts/drawing/drawables/primitives/circle.ts

@@ -1,47 +0,0 @@
-import { vec2 } from 'gl-matrix';
-import { GameObject } from '../../../objects/game-object';
-import { ImmutableBoundingBox } from '../../../physics/containers/immutable-bounding-box';
-import { IPrimitive } from './i-primitive';
-
-export class Circle implements IPrimitive {
-  public constructor(
-    public readonly owner: GameObject,
-    public center = vec2.create(),
-    public radius = 0
-  ) { }
-
-  public serializeToUniforms(uniforms: any): void {
-    throw new Error('Method not implemented.');
-  }
-
-  public distance(target: vec2): number {
-    return vec2.distance(this.center, target) - this.radius;
-  }
-
-  public minimumDistance(target: vec2): number {
-    return vec2.distance(this.center, target) - this.radius;
-  }
-
-  public get boundingBox(): ImmutableBoundingBox {
-    return new ImmutableBoundingBox(
-      this,
-      this.center.x - this.radius,
-      this.center.x + this.radius,
-      this.center.y - this.radius,
-      this.center.y + this.radius
-    );
-  }
-
-  public isInside(target: vec2): boolean {
-    return this.distance(target) < 0;
-  }
-
-  public areIntersecting(other: Circle): boolean {
-    const distance = vec2.distance(this.center, other.center);
-    return distance < this.radius + other.radius;
-  }
-
-  public clone(): Circle {
-    return new Circle(this.owner, this.center, this.radius);
-  }
-}

frontend/src/scripts/drawing/drawables/primitives/i-primitive.ts

@@ -1,5 +0,0 @@
-import { IDrawable } from '../i-drawable';
-
-export interface IPrimitive extends IDrawable {
-  clone(): IPrimitive
-}

frontend/src/scripts/drawing/drawables/primitives/tunnel-shape.ts

@@ -1,99 +0,0 @@
-import { vec2 } from 'gl-matrix';
-import { clamp01 } from '../../../helper/clamp';
-import { mix } from '../../../helper/mix';
-import { GameObject } from '../../../objects/game-object';
-import { ImmutableBoundingBox } from '../../../physics/containers/immutable-bounding-box';
-import { settings } from '../../settings';
-import { IDrawableDescriptor } from '../i-drawable-descriptor';
-import { Circle } from './circle';
-import { IPrimitive } from './i-primitive';
-
-export class TunnelShape implements IPrimitive {
-  public static descriptor: IDrawableDescriptor = {
-    uniformName: 'lines',
-    countMacroName: 'lineCount',
-    shaderCombinationSteps: settings.shaderCombinations.lineSteps,
-  };
-
-  public readonly toFromDelta: vec2;
-
-  private boundingCircle: Circle;
-
-  constructor(
-    public readonly owner: GameObject,
-    public readonly from: vec2,
-    public readonly to: vec2,
-    public readonly fromRadius: number,
-    public readonly toRadius: number
-  ) {
-    this.toFromDelta = vec2.subtract(vec2.create(), to, from);
-
-    this.boundingCircle = new Circle(
-      this.owner,
-      vec2.fromValues(from.x / 2 + to.x / 2, from.y / 2 + to.y / 2),
-      Math.max(fromRadius, toRadius) + vec2.distance(from, to)
-    );
-  }
-
-  public serializeToUniforms(uniforms: any): void {
-    if (!uniforms.hasOwnProperty(TunnelShape.descriptor.uniformName)) {
-      uniforms[TunnelShape.descriptor.uniformName] = [];
-    }
-
-    uniforms[TunnelShape.descriptor.uniformName].push({
-      from: this.from,
-      toFromDelta: this.toFromDelta,
-      fromRadius: this.fromRadius,
-      toRadius: this.toRadius,
-    });
-  }
-
-  public get boundingBox(): ImmutableBoundingBox {
-    const xMin = Math.min(
-      this.from.x - this.fromRadius,
-      this.to.x - this.toRadius
-    );
-    const yMin = Math.min(
-      this.from.y - this.fromRadius,
-      this.to.y - this.toRadius
-    );
-    const xMax = Math.max(
-      this.from.x + this.fromRadius,
-      this.to.x + this.toRadius
-    );
-    const yMax = Math.max(
-      this.from.y + this.fromRadius,
-      this.to.y + this.toRadius
-    );
-
-    return new ImmutableBoundingBox(this, xMin, xMax, yMin, yMax);
-  }
-
-  public distance(target: vec2): number {
-    const targetFromDelta = vec2.subtract(vec2.create(), target, this.from);
-    const h = clamp01(
-      vec2.dot(targetFromDelta, this.toFromDelta) /
-      vec2.dot(this.toFromDelta, this.toFromDelta)
-    );
-    return (
-      vec2.distance(
-        targetFromDelta,
-        vec2.scale(vec2.create(), this.toFromDelta, h)
-      ) - mix(this.fromRadius, this.toRadius, h)
-    );
-  }
-
-  public minimumDistance(target: vec2): number {
-    return this.boundingCircle.distance(target);
-  }
-
-  public clone(): TunnelShape {
-    return new TunnelShape(
-      this.owner,
-      this.from,
-      this.to,
-      this.fromRadius,
-      this.toRadius
-    );
-  }
-}

frontend/src/scripts/drawing/i-renderer.ts

@@ -1,12 +1,12 @@
 import { vec2 } from 'gl-matrix';
 import { ILight } from './drawables/lights/i-light';
-import { IPrimitive } from './drawables/primitives/i-primitive';
+import { IDrawable } from './drawables/i-drawable';
 
 export interface IRenderer {
   startFrame(deltaTime: DOMHighResTimeStamp): void;
   finishFrame(): void;
 
-  drawPrimitive(primitive: IPrimitive): void;
+  drawShape(drawable: IDrawable): void;
   drawLight(light: ILight): void;
   drawInfoText(text: string): void;
 

frontend/src/scripts/drawing/rendering/rendering-pass.ts

@@ -38,7 +38,7 @@ export class RenderingPass {
     const tileUvSize = vec2.fromValues(q, q);
 
     const possiblyOnScreenDrawables = this.drawables.filter(
-      (p) => p.minimumDistance(viewBoxCenter) < viewBoxRadius
+      (p) => p.distance(viewBoxCenter) < viewBoxRadius
     );
 
     const origin = vec2.transformMat2d(

frontend/src/scripts/drawing/rendering/webgl2-renderer.ts

@@ -2,8 +2,6 @@ import { mat2d, vec2 } from 'gl-matrix';
 import { CircleLight } from '../drawables/lights/circle-light';
 import { ILight } from '../drawables/lights/i-light';
 import { PointLight } from '../drawables/lights/point-light';
-import { IPrimitive } from '../drawables/primitives/i-primitive';
-import { TunnelShape } from '../drawables/primitives/tunnel-shape';
 // import lightsShader from '../shaders/rainbow-shading-fs.glsl';
 import { DefaultFrameBuffer } from '../graphics-library/frame-buffer/default-frame-buffer';
 import { IntermediateFrameBuffer } from '../graphics-library/frame-buffer/intermediate-frame-buffer';
@@ -16,6 +14,8 @@ import caveVertexShader from '../shaders/passthrough-distance-vs.glsl';
 import lightsVertexShader from '../shaders/passthrough-shading-vs.glsl';
 import { FpsAutoscaler } from './fps-autoscaler';
 import { RenderingPass } from './rendering-pass';
+import { IDrawable } from '../drawables/i-drawable';
+import { DrawableTunnel } from '../drawables/drawable-tunnel';
 
 export class WebGl2Renderer implements IRenderer {
   private gl: WebGL2RenderingContext;
@@ -50,7 +50,7 @@ export class WebGl2Renderer implements IRenderer {
     this.distancePass = new RenderingPass(
       this.gl,
       [caveVertexShader, caveFragmentShader],
-      [TunnelShape.descriptor],
+      [DrawableTunnel.descriptor],
       this.distanceFieldFrameBuffer
     );
 
@@ -71,8 +71,8 @@ export class WebGl2Renderer implements IRenderer {
     } catch {}
   }
 
-  public drawPrimitive(primitive: IPrimitive) {
-    this.distancePass.addDrawable(primitive);
+  public drawShape(shape: IDrawable) {
+    this.distancePass.addDrawable(shape);
   }
 
   public drawLight(light: ILight) {
@@ -94,14 +94,11 @@ export class WebGl2Renderer implements IRenderer {
       vec2.scale(vec2.create(), this.viewBoxSize, 0.5)
     );
 
-    this.distancePass.render(
-      this.uniforms,
-      this.cameraPosition,
-      viewBoxRadius
-    );
+    this.distancePass.render(this.uniforms, this.cameraPosition, viewBoxRadius);
 
     this.lightingPass.render(
-      this.uniforms, this.cameraPosition,
+      this.uniforms,
+      this.cameraPosition,
       viewBoxRadius,
       this.distanceFieldFrameBuffer.colorTexture
     );
@@ -111,7 +108,7 @@ export class WebGl2Renderer implements IRenderer {
 
   private get uniforms(): any {
     const cursorPosition = this.screenUvToWorldCoordinate(this.cursorPosition);
-    return { ...this.matrices, cursorPosition, viewBoxSize: this.viewBoxSize }
+    return { ...this.matrices, cursorPosition, viewBoxSize: this.viewBoxSize };
   }
 
   private calculateMatrices() {

frontend/src/scripts/objects/types/camera.ts

@@ -3,7 +3,7 @@ import { BeforeRenderCommand } from '../../drawing/commands/before-render';
 import { CursorMoveCommand } from '../../input/commands/cursor-move-command';
 import { ZoomCommand } from '../../input/commands/zoom';
 import { MoveToCommand } from '../../physics/commands/move-to';
-import { BoundingBox } from '../../physics/containers/bounding-box';
+import { BoundingBox } from '../../shapes/bounding-box';
 import { Physics } from '../../physics/physics';
 import { GameObject } from '../game-object';
 import { Lamp } from './lamp';

frontend/src/scripts/objects/types/character.ts

@@ -1,5 +1,5 @@
 import { vec2 } from 'gl-matrix';
-import { Circle } from '../../drawing/drawables/primitives/circle';
+import { Circle } from '../../shapes/types/circle';
 import { KeyDownCommand } from '../../input/commands/key-down';
 import { KeyUpCommand } from '../../input/commands/key-up';
 import { SwipeCommand } from '../../input/commands/swipe';
@@ -19,7 +19,7 @@ export class Character extends GameObject {
   constructor(private physics: Physics, private camera: Camera) {
     super();
 
-    this.primitive = new Circle(this);
+    this.primitive = new Circle();
     this.primitive.radius = 40;
 
     this.addCommandExecutor(StepCommand, this.stepHandler.bind(this));
@@ -45,9 +45,9 @@ export class Character extends GameObject {
 
     const intersects = this.physics
       .findIntersecting(nextPrimitive.boundingBox)
-      .filter((b) => b.value)
+      .filter((b) => b.shape)
       .map(
-        (b) => b.value.distance(nextPrimitive.center) + nextPrimitive.radius
+        (b) => b.shape.distance(nextPrimitive.center) + nextPrimitive.radius
       );
 
     console.log(intersects);

frontend/src/scripts/objects/types/tunnel.ts

@@ -2,12 +2,11 @@ import { vec2 } from 'gl-matrix';
 import { GameObject } from '../game-object';
 import { RenderCommand } from '../../drawing/commands/render';
 import { Physics } from '../../physics/physics';
-import { TunnelShape } from '../../drawing/drawables/primitives/tunnel-shape';
-
-export interface Line {}
+import { TunnelShape } from '../../shapes/types/tunnel-shape';
+import { DrawableTunnel } from '../../drawing/drawables/drawable-tunnel';
 
 export class Tunnel extends GameObject {
-  private primitive: TunnelShape;
+  private shape: DrawableTunnel;
 
   constructor(
     physics: Physics,
@@ -18,12 +17,12 @@ export class Tunnel extends GameObject {
   ) {
     super();
 
-    this.primitive = new TunnelShape(this, from, to, fromRadius, toRadius);
-    physics.addStaticBoundingBox(this.primitive.boundingBox);
+    this.shape = new DrawableTunnel(from, to, fromRadius, toRadius);
+    physics.addStaticBoundingBox(this.shape.boundingBox);
     this.addCommandExecutor(RenderCommand, this.draw.bind(this));
   }
 
   private draw(c: RenderCommand) {
-    c.renderer.drawPrimitive(this.primitive);
+    c.renderer.drawShape(this.shape);
   }
 }

frontend/src/scripts/physics/containers/bounding-box-list.ts

@@ -1,4 +1,4 @@
-import { BoundingBoxBase } from './bounding-box-base';
+import { BoundingBoxBase } from '../../shapes/bounding-box-base';
 
 export class BoundingBoxList {
   constructor(private boundingBoxes: Array<BoundingBoxBase> = []) {}

frontend/src/scripts/physics/containers/bounding-box-tree.ts

@@ -1,7 +1,7 @@
-import { ImmutableBoundingBox } from './immutable-bounding-box';
-
 // source: https://github.com/ubilabs/kd-tree-javascript/blob/master/kdTree.js
 
+import { ImmutableBoundingBox } from '../../shapes/immutable-bounding-box';
+
 class Node {
   public left?: Node = null;
   public right?: Node = null;
@@ -63,20 +63,6 @@ export class BoundingBoxTree {
     }
   }
 
-  public print() {
-    this.printRecursive(this.root, 0);
-  }
-
-  private printRecursive(node: Node, tabCount: number) {
-    if (node === null) {
-      return;
-    }
-
-    console.log(' '.repeat(tabCount) + '- ' + node.rectangle.value);
-    this.printRecursive(node.left, tabCount + 2);
-    this.printRecursive(node.right, tabCount + 2);
-  }
-
   public findIntersecting(
     box: ImmutableBoundingBox
   ): Array<ImmutableBoundingBox> {

frontend/src/scripts/physics/containers/immutable-bounding-box.ts

@@ -1,14 +0,0 @@
-import { BoundingBoxBase } from './bounding-box-base';
-import { IPrimitive } from '../../drawing/drawables/primitives/i-primitive';
-
-export class ImmutableBoundingBox extends BoundingBoxBase {
-  constructor(
-    value: IPrimitive,
-    xMin: number = 0,
-    xMax: number = 0,
-    yMin: number = 0,
-    yMax: number = 0
-  ) {
-    super(value, xMin, xMax, yMin, yMax);
-  }
-}

frontend/src/scripts/physics/physics.ts

@@ -1,7 +1,7 @@
 import { BoundingBoxTree } from './containers/bounding-box-tree';
 import { BoundingBoxList } from './containers/bounding-box-list';
-import { ImmutableBoundingBox } from './containers/immutable-bounding-box';
-import { BoundingBoxBase } from './containers/bounding-box-base';
+import { ImmutableBoundingBox } from '../shapes/immutable-bounding-box';
+import { BoundingBoxBase } from '../shapes/bounding-box-base';
 
 export class Physics {
   private isTreeInitialized = false;

frontend/src/scripts/shapes/bounding-box-base.ts

@@ -1,13 +1,13 @@
 import { vec2 } from 'gl-matrix';
-import { IPrimitive } from '../../drawing/drawables/primitives/i-primitive';
+import { IShape } from './i-shape';
 
 export abstract class BoundingBoxBase {
   constructor(
-    public readonly value: IPrimitive,
-    protected _xMin: number,
-    protected _xMax: number,
-    protected _yMin: number,
-    protected _yMax: number
+    public readonly shape: IShape,
+    protected _xMin: number = 0,
+    protected _xMax: number = 0,
+    protected _yMin: number = 0,
+    protected _yMax: number = 0
   ) {}
 
   public get 0(): number {

frontend/src/scripts/shapes/bounding-box.ts

@@ -1,32 +1,33 @@
 import { vec2 } from 'gl-matrix';
 import { BoundingBoxBase } from './bounding-box-base';
-import { IPrimitive } from '../../drawing/drawables/primitives/i-primitive';
+import { ImmutableBoundingBox } from './immutable-bounding-box';
 
 export class BoundingBox extends BoundingBoxBase {
-  constructor(
-    value: IPrimitive,
-    xMin: number = 0,
-    xMax: number = 0,
-    yMin: number = 0,
-    yMax: number = 0
-  ) {
-    super(value, xMin, xMax, yMin, yMax);
-  }
-
   public get topLeft(): vec2 {
     return vec2.fromValues(this._xMin, this._yMax);
   }
 
-  public get size(): vec2 {
-    return vec2.fromValues(this._xMax - this._xMin, this._yMax - this._yMin);
-  }
   public set topLeft(value: vec2) {
     this._xMin = value.x;
     this._yMax = value.y;
   }
 
+  public get size(): vec2 {
+    return vec2.fromValues(this._xMax - this._xMin, this._yMax - this._yMin);
+  }
+
   public set size(value: vec2) {
     this._xMax = this.xMin + value.x;
     this._yMin = this.yMax - value.y;
   }
+
+  public cloneAsImmutable(): ImmutableBoundingBox {
+    return new ImmutableBoundingBox(
+      this.shape,
+      this.xMin,
+      this.xMax,
+      this.yMin,
+      this.yMax
+    );
+  }
 }

frontend/src/scripts/shapes/i-shape.ts

@@ -0,0 +1,12 @@
+import { BoundingBox } from './bounding-box';
+import { vec2 } from 'gl-matrix';
+
+export interface IShape {
+  readonly isInverted: boolean;
+  readonly boundingBox: BoundingBox;
+
+  distance(target: vec2): number;
+  normal(from: vec2): vec2;
+
+  clone(): IShape;
+}

frontend/src/scripts/shapes/immutable-bounding-box.ts

@@ -0,0 +1,3 @@
+import { BoundingBoxBase } from './bounding-box-base';
+
+export class ImmutableBoundingBox extends BoundingBoxBase {}

frontend/src/scripts/shapes/types/circle.ts

@@ -0,0 +1,41 @@
+import { vec2 } from 'gl-matrix';
+import { IShape } from '../i-shape';
+import { BoundingBox } from '../bounding-box';
+
+export class Circle implements IShape {
+  public readonly isInverted = false;
+
+  public constructor(public center = vec2.create(), public radius = 0) {}
+
+  public distance(target: vec2): number {
+    return vec2.distance(this.center, target) - this.radius;
+  }
+
+  public normal(from: vec2): vec2 {
+    const diff = vec2.subtract(vec2.create(), from, this.center);
+    return vec2.normalize(diff, diff);
+  }
+
+  public get boundingBox(): BoundingBox {
+    return new BoundingBox(
+      this,
+      this.center.x - this.radius,
+      this.center.x + this.radius,
+      this.center.y - this.radius,
+      this.center.y + this.radius
+    );
+  }
+
+  public isInside(target: vec2): boolean {
+    return this.distance(target) < 0;
+  }
+
+  public areIntersecting(other: Circle): boolean {
+    const distance = vec2.distance(this.center, other.center);
+    return distance < this.radius + other.radius;
+  }
+
+  public clone(): Circle {
+    return new Circle(this.center, this.radius);
+  }
+}

frontend/src/scripts/shapes/types/tunnel-shape.ts

@@ -0,0 +1,65 @@
+import { vec2 } from 'gl-matrix';
+import { BoundingBox } from '../bounding-box';
+import { clamp01 } from '../../helper/clamp';
+import { mix } from '../../helper/mix';
+import { IShape } from '../i-shape';
+
+export class TunnelShape implements IShape {
+  public readonly isInverted = true;
+
+  public readonly toFromDelta: vec2;
+
+  constructor(
+    public readonly from: vec2,
+    public readonly to: vec2,
+    public readonly fromRadius: number,
+    public readonly toRadius: number
+  ) {
+    this.toFromDelta = vec2.subtract(vec2.create(), to, from);
+  }
+
+  public get boundingBox(): BoundingBox {
+    const xMin = Math.min(
+      this.from.x - this.fromRadius,
+      this.to.x - this.toRadius
+    );
+    const yMin = Math.min(
+      this.from.y - this.fromRadius,
+      this.to.y - this.toRadius
+    );
+    const xMax = Math.max(
+      this.from.x + this.fromRadius,
+      this.to.x + this.toRadius
+    );
+    const yMax = Math.max(
+      this.from.y + this.fromRadius,
+      this.to.y + this.toRadius
+    );
+
+    return new BoundingBox(this, xMin, xMax, yMin, yMax);
+  }
+
+  public normal(from: vec2): vec2 {
+    throw new Error('Unimplemented');
+  }
+
+  public distance(target: vec2): number {
+    const targetFromDelta = vec2.subtract(vec2.create(), target, this.from);
+
+    const h = clamp01(
+      vec2.dot(targetFromDelta, this.toFromDelta) /
+        vec2.dot(this.toFromDelta, this.toFromDelta)
+    );
+
+    return (
+      vec2.distance(
+        targetFromDelta,
+        vec2.scale(vec2.create(), this.toFromDelta, h)
+      ) - mix(this.fromRadius, this.toRadius, h)
+    );
+  }
+
+  public clone(): TunnelShape {
+    return new TunnelShape(this.from, this.to, this.fromRadius, this.toRadius);
+  }
+}