Working version

src/drawables/lights/flashlight.ts

@@ -0,0 +1,54 @@
+import { mat2d, vec2, vec3 } from 'gl-matrix';
+import { settings } from '../../graphics/settings';
+import { Drawable } from '../drawable';
+import { DrawableDescriptor } from '../drawable-descriptor';
+
+export class Flashlight extends Drawable {
+  public static get descriptor(): DrawableDescriptor {
+    return {
+      uniformName: 'flashlights',
+      countMacroName: 'flashlightCount',
+      shaderCombinationSteps: settings.shaderCombinations.flashlightSteps,
+      empty: new Flashlight(
+        vec2.fromValues(0, 0),
+        vec2.fromValues(0, 0),
+        0,
+        vec3.fromValues(0, 0, 0),
+        0
+      ),
+    };
+  }
+
+  public constructor(
+    public center: vec2,
+    public direction: vec2,
+    public lightDrop: number,
+    public color: vec3,
+    public lightness: number
+  ) {
+    super();
+  }
+
+  public distance(_: vec2): number {
+    return 0;
+  }
+
+  public serializeToUniforms(uniforms: any, scale: number, transform: mat2d): void {
+    const listName = Flashlight.descriptor.uniformName;
+
+    if (!Object.prototype.hasOwnProperty.call(uniforms, listName)) {
+      uniforms[listName] = [];
+    }
+
+    uniforms[listName].push({
+      center: vec2.transformMat2d(vec2.create(), this.center, transform),
+      direction: this.direction,
+      lightDrop: this.lightDrop,
+      value: this.value,
+    });
+  }
+
+  public get value(): vec3 {
+    return vec3.scale(vec3.create(), this.color, this.lightness);
+  }
+}