Refactor rendering

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

@@ -0,0 +1,27 @@
+import { vec2 } from 'gl-matrix';
+import { IPrimitive } from './i-primitive';
+
+export class Circle implements IPrimitive {
+  public constructor(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 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;
+  }
+}

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

@@ -0,0 +1,3 @@
+import { IDrawable } from '../i-drawable';
+
+export interface IPrimitive extends IDrawable {}

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

@@ -0,0 +1,18 @@
+import { vec2 } from 'gl-matrix';
+
+export class Rectangle {
+  public constructor(
+    public topLeft: vec2 = vec2.create(),
+    public size: vec2 = vec2.create()
+  ) {}
+
+  public isInside(position: vec2): boolean {
+    const translated = vec2.subtract(vec2.create(), position, this.topLeft);
+    return (
+      0 <= translated.x &&
+      translated.x < this.size.x &&
+      0 <= translated.y &&
+      translated.y < this.size.y
+    );
+  }
+}

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

@@ -0,0 +1,67 @@
+import { vec2 } from 'gl-matrix';
+import { clamp01 } from '../../../helper/clamp';
+import { mix } from '../../../helper/mix';
+import { Circle } from './circle';
+import { IPrimitive } from './i-primitive';
+import { IDrawableDescriptor } from '../i-drawable-descriptor';
+import { settings } from '../../settings';
+
+export class TunnelShape implements IPrimitive {
+  public static descriptor: IDrawableDescriptor = {
+    uniformName: 'lines',
+    countMacroName: 'lineCount',
+    shaderCombinationSteps: settings.shaderCombinations.lineSteps,
+  };
+
+  public readonly toFromDelta: vec2;
+  private toFromDeltaLength: number;
+
+  private boundingCircle: Circle;
+
+  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);
+    this.toFromDeltaLength = vec2.length(this.toFromDelta);
+
+    this.boundingCircle = new Circle(
+      vec2.fromValues(from.x / 2 + to.x / 2, from.y / 2 + to.y / 2),
+      Math.max(fromRadius, toRadius) + vec2.distance(from, to)
+    );
+  }
+
+  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 distance(target: vec2): number {
+    const targetFromDelta = vec2.subtract(vec2.create(), target, this.from);
+    const h = clamp01(
+      vec2.dot(targetFromDelta, this.toFromDelta) /
+        this.toFromDeltaLength /
+        this.toFromDeltaLength
+    );
+    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);
+  }
+}