Some refactoring

frontend/src/scripts/drawing/shaders/random.frag

@@ -1,48 +0,0 @@
-#version 300 es
-
-precision mediump float;
-
-const float inf = 1000000.0;
-const float pi = atan(1.0) * 4.0;
-
-float interpolate(float from, float to, float quotient) {
-    float steppedQ = sin(quotient * pi - pi * 0.5) * 0.5 + 0.5;
-    return from + (to - from) * clamp(steppedQ, 0.0, 1.0);
-}
-
-float noise(float x){
-    return fract(sin(x) * 43758.5453123);
-}
-
-float terrain(float x) {
-    float result = 0.0;
-
-    float frequency = 0.01;
-    float amplitude = 1.0;
-
-    for (int i = 0; i < 8; i++) {
-        result += sin(2.0 * pi * x * frequency - 2.0 * pi * noise(float(i) * 200.0)) * amplitude;
-        frequency *= 1.5;
-        amplitude /= 1.2;
-    }
-
-    return result;
-}
-
-vec2 random2(vec2 st){
-    st = vec2( dot(st,vec2(127.1,311.7)),
-              dot(st,vec2(269.5,183.3)) );
-    return -1.0 + 2.0*fract(sin(st)*43758.5453123);
-}
-
-float noise(vec2 st) {
-    vec2 i = floor(st);
-    vec2 f = fract(st);
-
-    vec2 u = f*f*(3.0-2.0*f);
-
-    return mix( mix( dot( random2(i + vec2(0.0,0.0) ), f - vec2(0.0,0.0) ),
-                     dot( random2(i + vec2(1.0,0.0) ), f - vec2(1.0,0.0) ), u.x),
-                mix( dot( random2(i + vec2(0.0,1.0) ), f - vec2(0.0,1.0) ),
-                     dot( random2(i + vec2(1.0,1.0) ), f - vec2(1.0,1.0) ), u.x), u.y);
-}

frontend/src/scripts/game.ts

@@ -1,8 +1,8 @@
 import { CommandBroadcaster } from './commands/command-broadcaster';
-import { BeforeRenderCommand } from './drawing/commands/before-render';
-import { RenderCommand } from './drawing/commands/render';
-import { IRenderer } from './drawing/i-renderer';
-import { WebGl2Renderer } from './drawing/rendering/webgl2-renderer';
+import { BeforeRenderCommand } from './graphics/commands/before-render';
+import { RenderCommand } from './graphics/commands/render';
+import { IRenderer } from './graphics/i-renderer';
+import { WebGl2Renderer } from './graphics/rendering/webgl2-renderer';
 import { timeIt } from './helper/timing';
 import { IGame } from './i-game';
 import { KeyboardListener } from './input/keyboard-listener';
@@ -128,13 +128,12 @@ export class Game implements IGame {
     this.previousFpsValues.push(1000 / deltaTime);
     if (this.previousFpsValues.length > 30) {
       this.previousFpsValues.sort();
-      const text = `Min: ${this.previousFpsValues[0].toFixed(
-        2
-      )}\n\tMedian: ${this.previousFpsValues[
+      const min = this.previousFpsValues[0];
+      const median = this.previousFpsValues[
         Math.floor(this.previousFpsValues.length / 2)
-      ].toFixed(2)}`;
+      ];
 
-      InfoText.modifyRecord('FPS', text);
+      InfoText.modifyRecord('FPS', { min, median });
 
       this.previousFpsValues = [];
     }

frontend/src/scripts/graphics/commands/before-render.ts

@@ -0,0 +1,12 @@
+import { Command } from '../../commands/command';
+import { IRenderer } from '../i-renderer';
+
+export class BeforeRenderCommand extends Command {
+  public constructor(public readonly renderer?: IRenderer) {
+    super();
+  }
+
+  public get type(): string {
+    return 'BeforeRenderCommand';
+  }
+}

frontend/src/scripts/graphics/commands/render.ts

@@ -0,0 +1,12 @@
+import { Command } from '../../commands/command';
+import { IRenderer } from '../../graphics/i-renderer';
+
+export class RenderCommand extends Command {
+  public constructor(public readonly renderer?: IRenderer) {
+    super();
+  }
+
+  public get type(): string {
+    return 'RenderCommand';
+  }
+}

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

@@ -0,0 +1,32 @@
+import { mat2d, vec2 } from 'gl-matrix';
+import { Blob } from '../../shapes/types/blob';
+import { settings } from '../settings';
+import { IDrawable } from './i-drawable';
+import { IDrawableDescriptor } from './i-drawable-descriptor';
+
+export class DrawableBlob extends Blob implements IDrawable {
+  public static descriptor: IDrawableDescriptor = {
+    uniformName: 'blobs',
+    countMacroName: 'blobCount',
+    shaderCombinationSteps: settings.shaderCombinations.blobSteps,
+    empty: new DrawableBlob(vec2.fromValues(0, 0)),
+  };
+
+  public serializeToUniforms(uniforms: any, scale: number, transform: mat2d): void {
+    const { uniformName } = DrawableBlob.descriptor;
+    if (!Object.prototype.hasOwnProperty.call(uniforms, uniformName)) {
+      uniforms[uniformName] = [];
+    }
+    uniforms[uniformName].push({
+      headCenter: vec2.transformMat2d(vec2.create(), this.head.center, transform),
+      leftFootCenter: vec2.transformMat2d(vec2.create(), this.leftFoot.center, transform),
+      rightFootCenter: vec2.transformMat2d(
+        vec2.create(),
+        this.rightFoot.center,
+        transform
+      ),
+      headRadius: this.headRadius * scale,
+      footRadius: this.footRadius * scale,
+    });
+  }
+}

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,
+    });
+  }
+}

frontend/src/scripts/graphics/drawables/i-drawable-descriptor.ts

@@ -0,0 +1,8 @@
+import { IDrawable } from './i-drawable';
+
+export interface IDrawableDescriptor {
+  uniformName: string;
+  countMacroName: string;
+  shaderCombinationSteps: Array<number>;
+  readonly empty: IDrawable;
+}

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

@@ -0,0 +1,6 @@
+import { vec2, mat2d } from 'gl-matrix';
+
+export interface IDrawable {
+  distance(target: vec2): number;
+  serializeToUniforms(uniforms: any, scale: number, transform: mat2d): void;
+}

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

@@ -0,0 +1,46 @@
+import { mat2d, vec2, vec3 } from 'gl-matrix';
+import { settings } from '../../settings';
+import { IDrawableDescriptor } from '../i-drawable-descriptor';
+import { ILight } from './i-light';
+
+export class CircleLight implements ILight {
+  public static descriptor: IDrawableDescriptor = {
+    uniformName: 'circleLights',
+    countMacroName: 'circleLightCount',
+    shaderCombinationSteps: settings.shaderCombinations.circleLightSteps,
+    empty: new CircleLight(vec2.fromValues(0, 0), 0, vec3.fromValues(0, 0, 0), 0),
+  };
+
+  constructor(
+    public center: vec2,
+    public lightDrop: number,
+    public color: vec3,
+    public lightness: number
+  ) {}
+
+  public distance(_: vec2): number {
+    return 0;
+  }
+
+  public serializeToUniforms(uniforms: any, scale: number, transform: mat2d): void {
+    const { uniformName } = CircleLight.descriptor;
+
+    if (!Object.prototype.hasOwnProperty.call(uniforms, uniformName)) {
+      uniforms[uniformName] = [];
+    }
+
+    uniforms[uniformName].push({
+      center: vec2.transformMat2d(vec2.create(), this.center, transform),
+      lightDrop: this.lightDrop,
+      value: this.value,
+    });
+  }
+
+  public get value(): vec3 {
+    return vec3.scale(
+      vec3.create(),
+      vec3.normalize(this.color, this.color),
+      this.lightness
+    );
+  }
+}

frontend/src/scripts/graphics/drawables/lights/flashlight.ts

@@ -0,0 +1,50 @@
+import { mat2d, vec2, vec3 } from 'gl-matrix';
+import { settings } from '../../settings';
+import { IDrawableDescriptor } from '../i-drawable-descriptor';
+import { ILight } from './i-light';
+
+export class Flashlight implements ILight {
+  public static descriptor: IDrawableDescriptor = {
+    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
+  ) {}
+
+  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);
+  }
+}

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

@@ -0,0 +1,3 @@
+import { IDrawable } from '../i-drawable';
+
+export type ILight = IDrawable;

frontend/src/scripts/graphics/graphics-library/compiling/check-program.ts

@@ -0,0 +1,13 @@
+import { checkShader } from './check-shader';
+
+export const checkProgram = (gl: WebGL2RenderingContext, program: WebGLProgram) => {
+  const success = gl.getProgramParameter(program, gl.LINK_STATUS);
+
+  if (!success) {
+    gl.getAttachedShaders(program).forEach((s) => {
+      checkShader(gl, s);
+    });
+
+    throw new Error(gl.getProgramInfoLog(program));
+  }
+};

frontend/src/scripts/graphics/graphics-library/compiling/check-shader.ts

@@ -0,0 +1,7 @@
+export const checkShader = (gl: WebGL2RenderingContext, shader: WebGLShader) => {
+  const success = gl.getShaderParameter(shader, gl.COMPILE_STATUS);
+
+  if (!success) {
+    throw new Error(gl.getShaderInfoLog(shader));
+  }
+};

frontend/src/scripts/graphics/graphics-library/compiling/create-program.ts

@@ -0,0 +1,44 @@
+import { waitWhileFalse } from '../../../helper/wait-while-false';
+import { tryEnableExtension } from '../helper/enable-extension';
+import { checkProgram } from './check-program';
+import { createShader } from './create-shader';
+
+export const createProgram = async (
+  gl: WebGL2RenderingContext,
+  vertexShaderSource: string,
+  fragmentShaderSource: string,
+  substitutions: { [name: string]: string }
+): Promise<WebGLProgram> => {
+  const program = gl.createProgram();
+
+  const extension = tryEnableExtension(gl, 'KHR_parallel_shader_compile');
+
+  const vertexShader = createShader(
+    gl,
+    gl.VERTEX_SHADER,
+    vertexShaderSource,
+    substitutions
+  );
+  gl.attachShader(program, vertexShader);
+
+  const fragmentShader = createShader(
+    gl,
+    gl.FRAGMENT_SHADER,
+    fragmentShaderSource,
+    substitutions
+  );
+  gl.attachShader(program, fragmentShader);
+
+  gl.linkProgram(program);
+
+  if (extension) {
+    const checkCompileStatus = () =>
+      gl.getProgramParameter(program, extension.COMPLETION_STATUS_KHR);
+
+    await waitWhileFalse(checkCompileStatus);
+  }
+
+  checkProgram(gl, program);
+
+  return program;
+};

frontend/src/scripts/graphics/graphics-library/compiling/create-shader.ts

@@ -0,0 +1,17 @@
+export const createShader = (
+  gl: WebGL2RenderingContext,
+  type: GLenum,
+  source: string,
+  substitutions: { [name: string]: string }
+): WebGLShader => {
+  source = source.replace(/{(.+)}/gm, (_, name: string): string => {
+    const value = substitutions[name];
+    return Number.isInteger(value) ? `${value}.0` : value;
+  });
+
+  const shader = gl.createShader(type);
+  gl.shaderSource(shader, source);
+  gl.compileShader(shader);
+
+  return shader;
+};

frontend/src/scripts/graphics/graphics-library/frame-buffer/default-frame-buffer.ts

@@ -0,0 +1,19 @@
+import { FrameBuffer } from './frame-buffer';
+
+export class DefaultFrameBuffer extends FrameBuffer {
+  constructor(gl: WebGL2RenderingContext) {
+    super(gl);
+    this.frameBuffer = null;
+    this.setSize();
+  }
+
+  public setSize(): boolean {
+    const hasChanged = super.setSize();
+    if (hasChanged) {
+      this.gl.canvas.width = this.size.x;
+      this.gl.canvas.height = this.size.y;
+    }
+
+    return hasChanged;
+  }
+}

frontend/src/scripts/graphics/graphics-library/frame-buffer/frame-buffer.ts

@@ -0,0 +1,44 @@
+import { vec2 } from 'gl-matrix';
+import { settings } from '../../settings';
+
+export abstract class FrameBuffer {
+  public renderScale = 1;
+  public enableHighDpiRendering = settings.enableHighDpiRendering;
+
+  protected size = vec2.create();
+  protected frameBuffer: WebGLFramebuffer;
+
+  constructor(protected gl: WebGL2RenderingContext) {}
+
+  public bindAndClear(colorInput?: WebGLTexture) {
+    this.gl.bindFramebuffer(this.gl.FRAMEBUFFER, this.frameBuffer);
+
+    if (colorInput !== null) {
+      this.gl.bindTexture(this.gl.TEXTURE_2D, colorInput);
+    }
+
+    this.gl.viewport(0, 0, this.size.x, this.size.y);
+    this.gl.clearColor(0, 0, 0, 0);
+    this.gl.clear(this.gl.COLOR_BUFFER_BIT | this.gl.DEPTH_BUFFER_BIT);
+  }
+
+  public setSize(): boolean {
+    const realToCssPixels =
+      (this.enableHighDpiRendering ? window.devicePixelRatio : 1) * this.renderScale;
+
+    const canvasWidth = (this.gl.canvas as HTMLCanvasElement).clientWidth;
+    const canvasHeight = (this.gl.canvas as HTMLCanvasElement).clientHeight;
+
+    const displayWidth = Math.floor(canvasWidth * realToCssPixels);
+    const displayHeight = Math.floor(canvasHeight * realToCssPixels);
+
+    const oldSize = vec2.clone(this.getSize());
+    this.size = vec2.fromValues(displayWidth, displayHeight);
+
+    return this.size.x != oldSize.x || this.size.y != oldSize.y;
+  }
+
+  public getSize(): vec2 {
+    return this.size;
+  }
+}

frontend/src/scripts/graphics/graphics-library/frame-buffer/intermediate-frame-buffer.ts

@@ -0,0 +1,89 @@
+import { enableExtension } from '../helper/enable-extension';
+import { FrameBuffer } from './frame-buffer';
+
+export class IntermediateFrameBuffer extends FrameBuffer {
+  private frameTexture: WebGLTexture;
+  private floatLinearEnabled = false;
+
+  constructor(gl: WebGL2RenderingContext) {
+    super(gl);
+
+    enableExtension(gl, 'EXT_color_buffer_float');
+
+    try {
+      enableExtension(gl, 'OES_texture_float_linear');
+      this.floatLinearEnabled = true;
+    } catch {
+      // it's okay
+    }
+
+    this.frameTexture = this.gl.createTexture();
+    this.configureTexture();
+
+    this.frameBuffer = this.gl.createFramebuffer();
+    this.configureFrameBuffer();
+
+    this.setSize();
+  }
+
+  public get colorTexture(): WebGLTexture {
+    return this.frameTexture;
+  }
+
+  public setSize(): boolean {
+    const hasChanged = super.setSize();
+    if (hasChanged) {
+      this.gl.bindTexture(this.gl.TEXTURE_2D, this.frameTexture);
+
+      this.gl.texImage2D(
+        this.gl.TEXTURE_2D,
+        0,
+        this.gl.RG16F,
+        this.size.x,
+        this.size.y,
+        0,
+        this.gl.RG,
+        this.gl.FLOAT,
+        null
+      );
+    }
+
+    return hasChanged;
+  }
+
+  private configureTexture() {
+    this.gl.bindTexture(this.gl.TEXTURE_2D, this.frameTexture);
+    this.gl.texParameteri(
+      this.gl.TEXTURE_2D,
+      this.gl.TEXTURE_MAG_FILTER,
+      this.floatLinearEnabled ? this.gl.LINEAR : this.gl.NEAREST
+    );
+    this.gl.texParameteri(
+      this.gl.TEXTURE_2D,
+      this.gl.TEXTURE_MIN_FILTER,
+      this.floatLinearEnabled ? this.gl.LINEAR : this.gl.NEAREST
+    );
+    this.gl.texParameteri(
+      this.gl.TEXTURE_2D,
+      this.gl.TEXTURE_WRAP_S,
+      this.gl.CLAMP_TO_EDGE
+    );
+    this.gl.texParameteri(
+      this.gl.TEXTURE_2D,
+      this.gl.TEXTURE_WRAP_T,
+      this.gl.CLAMP_TO_EDGE
+    );
+  }
+
+  private configureFrameBuffer() {
+    this.gl.bindFramebuffer(this.gl.FRAMEBUFFER, this.frameBuffer);
+    const attachmentPoint = this.gl.COLOR_ATTACHMENT0;
+    this.gl.framebufferTexture2D(
+      this.gl.FRAMEBUFFER,
+      attachmentPoint,
+      this.gl.TEXTURE_2D,
+      this.frameTexture,
+      0
+    );
+  }
+}

frontend/src/scripts/graphics/graphics-library/helper/enable-extension.ts

@@ -0,0 +1,41 @@
+import { InfoText } from '../../../objects/types/info-text';
+
+const extensions: Map<string, any> = new Map();
+
+const printExtensions = () => {
+  const values = {};
+  for (const [k, v] of extensions.entries()) {
+    values[k] = v !== null;
+  }
+  InfoText.modifyRecord('extensions', values);
+};
+
+export const tryEnableExtension = (
+  gl: WebGL2RenderingContext,
+  name: string
+): any | null => {
+  if (extensions.has(name)) {
+    return extensions.get(name);
+  }
+
+  let extension = null;
+  if (gl.getSupportedExtensions().indexOf(name) != -1) {
+    extension = gl.getExtension(name);
+  }
+
+  extensions.set(name, extension);
+
+  printExtensions();
+
+  return extension;
+};
+
+export const enableExtension = (gl: WebGL2RenderingContext, name: string): any => {
+  const extension = tryEnableExtension(gl, name);
+
+  if (extension === null) {
+    throw new Error(`Unsupported extension ${name}`);
+  }
+
+  return extension;
+};

frontend/src/scripts/graphics/graphics-library/helper/get-webgl2-context.ts

@@ -0,0 +1,9 @@
+export const getWebGl2Context = (canvas: HTMLCanvasElement): WebGL2RenderingContext => {
+  const gl = canvas.getContext('webgl2');
+
+  if (!gl) {
+    throw new Error('WebGl2 is not supported');
+  }
+
+  return gl;
+};