Add blob and fix some issues

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

@@ -0,0 +1,26 @@
+import { IDrawable } from './i-drawable';
+import { IDrawableDescriptor } from './i-drawable-descriptor';
+import { settings } from '../settings';
+import { Blob } from '../../shapes/types/blob';
+
+export class DrawableBlob extends Blob implements IDrawable {
+  public static descriptor: IDrawableDescriptor = {
+    uniformName: 'blobs',
+    countMacroName: 'blobCount',
+    shaderCombinationSteps: settings.shaderCombinations.blobSteps,
+  };
+
+  public serializeToUniforms(uniforms: any): void {
+    const uniformName = DrawableBlob.descriptor.uniformName;
+    if (!uniforms.hasOwnProperty(uniformName)) {
+      uniforms[uniformName] = [];
+    }
+
+    uniforms[uniformName].push({
+      headCenter: this.head.center,
+      torsoCenter: this.torso.center,
+      leftFootCenter: this.leftFoot.center,
+      rightFootCenter: this.rightFoot.center,
+    });
+  }
+}

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

@@ -1,11 +1,22 @@
 import { FrameBuffer } from './frame-buffer';
+import { enableExtension } from '../helper/enable-extension';
 
 export class IntermediateFrameBuffer extends FrameBuffer {
   private frameTexture: WebGLTexture;
 
+  private floatLinearEnabled = true;
+
   constructor(gl: WebGL2RenderingContext) {
     super(gl);
 
+    enableExtension(gl, 'EXT_color_buffer_float');
+
+    try {
+      enableExtension(gl, 'OES_texture_float_linear');
+    } catch {
+      this.floatLinearEnabled = false;
+    }
+
     this.frameTexture = this.gl.createTexture();
     this.configureTexture();
 
@@ -27,12 +38,12 @@ export class IntermediateFrameBuffer extends FrameBuffer {
     this.gl.texImage2D(
       this.gl.TEXTURE_2D,
       0,
-      this.gl.RGBA,
+      this.gl.RG16F,
       this.size.x,
       this.size.y,
       0,
-      this.gl.RGBA,
-      this.gl.UNSIGNED_BYTE,
+      this.gl.RG,
+      this.gl.FLOAT,
       null
     );
   }
@@ -42,12 +53,12 @@ export class IntermediateFrameBuffer extends FrameBuffer {
     this.gl.texParameteri(
       this.gl.TEXTURE_2D,
       this.gl.TEXTURE_MAG_FILTER,
-      this.gl.LINEAR
+      this.floatLinearEnabled ? this.gl.LINEAR : this.gl.NEAREST
     );
     this.gl.texParameteri(
       this.gl.TEXTURE_2D,
       this.gl.TEXTURE_MIN_FILTER,
-      this.gl.LINEAR
+      this.floatLinearEnabled ? this.gl.LINEAR : this.gl.NEAREST
     );
     this.gl.texParameteri(
       this.gl.TEXTURE_2D,

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

@@ -0,0 +1,10 @@
+export const enableExtension = (
+  gl: WebGL2RenderingContext,
+  name: string
+): any => {
+  if (gl.getSupportedExtensions().indexOf(name) == -1) {
+    throw new Error(`Unsupported extension ${name}`);
+  }
+
+  return gl.getExtension(name);
+};

frontend/src/scripts/drawing/graphics-library/helper/stopwatch.ts

@@ -1,4 +1,5 @@
 import { InfoText } from '../../../objects/types/info-text';
+import { enableExtension } from './enable-extension';
 
 // https://www.khronos.org/registry/webgl/extensions/EXT_disjoint_timer_query_webgl2/
 
@@ -10,15 +11,8 @@ export class WebGlStopwatch {
   private resultsInNanoSeconds: number;
 
   constructor(private gl: WebGL2RenderingContext) {
-    if (
-      this.gl
-        .getSupportedExtensions()
-        .indexOf('EXT_disjoint_timer_query_webgl2') == -1
-    ) {
-      throw new Error('Unsupported extension');
-    }
-
-    this.timerExtension = this.gl.getExtension(
+    this.timerExtension = enableExtension(
+      gl,
       'EXT_disjoint_timer_query_webgl2'
     );
   }

frontend/src/scripts/drawing/graphics-library/program/uniform-array-autoscaling-program.ts

@@ -34,7 +34,7 @@ export class UniformArrayAutoScalingProgram implements IProgram {
     );
 
     const closest = this.programs.find((p) =>
-      p.values.every((v, i) => v > values[i])
+      p.values.every((v, i) => v >= values[i])
     );
 
     this.current = closest ? closest.program : last(this.programs).program;

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

@@ -16,6 +16,8 @@ import { FpsAutoscaler } from './fps-autoscaler';
 import { RenderingPass } from './rendering-pass';
 import { IDrawable } from '../drawables/i-drawable';
 import { DrawableTunnel } from '../drawables/drawable-tunnel';
+import { enableExtension } from '../graphics-library/helper/enable-extension';
+import { DrawableBlob } from '../drawables/drawable-blob';
 
 export class WebGl2Renderer implements IRenderer {
   private gl: WebGL2RenderingContext;
@@ -50,7 +52,7 @@ export class WebGl2Renderer implements IRenderer {
     this.distancePass = new RenderingPass(
       this.gl,
       [caveVertexShader, caveFragmentShader],
-      [DrawableTunnel.descriptor],
+      [DrawableTunnel.descriptor, DrawableBlob.descriptor],
       this.distanceFieldFrameBuffer
     );
 

frontend/src/scripts/drawing/settings.ts

@@ -8,10 +8,11 @@ export const settings = {
       [0.2, 0.1],
       [0.6, 0.1],
       [1, 0.3],
-      [1.25, 0.75],
+      /*[1.25, 0.75],
       [1.5, 1],
       [1.75, 1.25],
       [1.75, 1.75],
+      [2, 2],*/
     ],
     startingTargetIndex: 2,
     scalingOptions: {
@@ -21,13 +22,15 @@ export const settings = {
   },
   tileMultiplier: 5,
   shaderMacros: {
-    distanceScale: 64,
-    distanceOffset: 0.0,
     edgeSmoothing: 10,
+    headRadius: 5,
+    torsoRadius: 10,
+    footRadius: 4,
   },
   shaderCombinations: {
-    lineSteps: [0, 1, 2, 3, 4, 8, 16, 128],
-    circleLightSteps: [0, 1, 2, 3],
+    lineSteps: [0, 1, 2, 4, 8, 16, 128],
+    blobSteps: [0, 1, 2, 8],
+    circleLightSteps: [0, 1],
     pointLightSteps: [0, 1, 2, 3],
   },
 };

frontend/src/scripts/drawing/shaders/cave-distance-fs.glsl

@@ -3,10 +3,7 @@
 precision mediump float;
 
 #define LINE_COUNT {lineCount}
-#define CAVE_COLOR vec3(0.36, 0.38, 0.76)
-#define AIR_COLOR vec3(0.7)
-#define DISTANCE_SCALE {distanceScale}
-#define DISTANCE_OFFSET {distanceOffset}
+#define BLOB_COUNT {blobCount}
  
 uniform float maxMinDistance; 
 
@@ -17,32 +14,76 @@ uniform float maxMinDistance;
         float fromRadius;
         float toRadius;
     }[LINE_COUNT] lines;
-#endif
 
-in vec2 worldCoordinates;
-out vec4 fragmentColor;
-
-void main() {
-    float realDistance = 0.0;
-
-    #if LINE_COUNT > 0
-        float minDistance = maxMinDistance;
+    void lineMinDistance(vec2 worldCoordinates, inout float minDistance) {
+        minDistance = maxMinDistance;
 
         for (int i = 0; i < LINE_COUNT; i++) {
             vec2 targetFromDelta = worldCoordinates - lines[i].from;
             vec2 toFromDelta = lines[i].toFromDelta;
-            float h = clamp(dot(targetFromDelta, toFromDelta) / dot(toFromDelta, toFromDelta), 0.0, 1.0);
-            float lineDistance = distance(targetFromDelta, toFromDelta * h) - mix(lines[i].fromRadius, lines[i].toRadius, h);
+            
+            float h = clamp(
+                dot(targetFromDelta, toFromDelta) / dot(toFromDelta, toFromDelta),
+                0.0, 1.0
+            );
+
+            float lineDistance = (
+                    distance(targetFromDelta, toFromDelta * h) 
+                - mix(lines[i].fromRadius, lines[i].toRadius, h)
+            );
 
             minDistance = min(minDistance, lineDistance);
         }
 
-        realDistance = -minDistance;
+        minDistance *= -1.0;
+    }
+#endif
+
+#if BLOB_COUNT > 0
+    #define headRadius {headRadius}
+    #define torsoRadius {torsoRadius}
+    #define footRadius {footRadius}
+
+    uniform struct Blob {
+        vec2 headCenter;
+        vec2 torsoCenter;
+        vec2 leftFootCenter;
+        vec2 rightFootCenter;
+    }[BLOB_COUNT] blobs;
+
+    float circleMinDistance(vec2 worldCoordinates, vec2 circleCenter, float radius) {
+        return distance(worldCoordinates, circleCenter) - radius;
+    }
+
+    void blobMinDistance(vec2 worldCoordinates, inout float minDistance) {
+        float k = 1.0;
+
+        for (int i = 0; i < BLOB_COUNT; i++) {
+            float res = exp2(-k * circleMinDistance(worldCoordinates, blobs[i].headCenter, headRadius));
+            res += exp2(-k * circleMinDistance(worldCoordinates, blobs[i].torsoCenter, torsoRadius));
+            res += exp2(-k * circleMinDistance(worldCoordinates, blobs[i].leftFootCenter, footRadius));
+            res += exp2(-k * circleMinDistance(worldCoordinates, blobs[i].rightFootCenter, footRadius));
+
+            minDistance = min(minDistance, -log2(res) / k);
+        }
+    }
+#endif
+
+
+
+in vec2 worldCoordinates;
+out vec2 fragmentColor;
+
+void main() {
+    float minDistance = -maxMinDistance;
+
+    #if LINE_COUNT > 0
+        lineMinDistance(worldCoordinates, minDistance);
     #endif
 
-    fragmentColor = vec4(
-        mix(CAVE_COLOR, AIR_COLOR, clamp(realDistance, 0.0, 1.0)),
-        (realDistance + DISTANCE_OFFSET) / DISTANCE_SCALE
+    #if BLOB_COUNT > 0
+        blobMinDistance(worldCoordinates, minDistance);
+    #endif
 
-    );
+    fragmentColor = vec2(minDistance, 0.0);
 }

frontend/src/scripts/drawing/shaders/lights-shading-fs.glsl

@@ -8,21 +8,26 @@ precision mediump float;
 
 #define CIRCLE_LIGHT_COUNT {circleLightCount}
 #define POINT_LIGHT_COUNT {pointLightCount}
-#define DISTANCE_SCALE {distanceScale}
-#define DISTANCE_OFFSET {distanceOffset}
 #define EDGE_SMOOTHING {edgeSmoothing}
 
 uniform sampler2D distanceTexture;
 uniform vec2 viewBoxSize;
 
+vec3[4] colors = vec3[4](
+    vec3(0.5),
+    vec3(1.0, 0.0, 0.0),
+    vec3(0.0, 1.0, 0.0),
+    vec3(0.0, 0.0, 1.0)
+);
+
 float getDistance(in vec2 target, out vec3 color) {
     vec4 values = texture(distanceTexture, target);
-    color = values.rgb;
-    return (values.w - DISTANCE_OFFSET) * DISTANCE_SCALE;
+    color = colors[int(values[1])];
+    return values[0];
 }
 
 float getDistance(in vec2 target) {
-    return (texture(distanceTexture, target).w - DISTANCE_OFFSET) * DISTANCE_SCALE;
+    return texture(distanceTexture, target)[0];
 }
 
 #if CIRCLE_LIGHT_COUNT > 0
@@ -58,10 +63,6 @@ void main() {
         for (int i = 0; i < CIRCLE_LIGHT_COUNT; i++) {
             float lightCenterDistance = distance(circleLights[i].center, worldCoordinates);
 
-            /*if (lightCenterDistance < circleLights[i].radius) {
-                 fragmentColor = vec4(1.0, 1.0, 0.0, 1.0);
-                return;
-            }*/
             vec3 lightColorAtPosition = circleLights[i].value / pow(
                 lightCenterDistance / LIGHT_DROP + 1.0, 2.0
             );
@@ -76,7 +77,7 @@ void main() {
                     rayLength = lightCenterDistance - circleLights[i].radius;
                     float minDistance = getDistance(uvCoordinates + direction * rayLength);
                     exponentialDecayDistance = (exponentialDecayDistance + minDistance) / 2.0;
-                    q = min(q, exponentialDecayDistance / rayLength);
+                    q = min(q, minDistance / rayLength);
 
                     lighting += lightColorAtPosition * clamp(
                         q / circleLights[i].radius * (lightCenterDistance + 1.0), 0.0, 1.0
@@ -122,5 +123,5 @@ void main() {
         }
     #endif
 
-    fragmentColor = vec4(colorAtPosition * lighting * clamp(startingDistance, 0.0, 1.0), 1.0);
+    fragmentColor = vec4(colorAtPosition * lighting * step(0.0, startingDistance), 1.0);
 }

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

@@ -13,11 +13,10 @@ export class Camera extends GameObject {
   private cursorPosition = vec2.create();
   private boundingBox: BoundingBox;
 
-  constructor(physics: Physics, private light: Lamp) {
+  constructor() {
     super();
 
     this.boundingBox = new BoundingBox(null);
-    //physics.addDynamicBoundingBox(this.boundingBox);
 
     this.addCommandExecutor(BeforeRenderCommand, this.draw.bind(this));
     this.addCommandExecutor(MoveToCommand, this.moveTo.bind(this));
@@ -40,7 +39,6 @@ export class Camera extends GameObject {
 
   private moveTo(c: MoveToCommand) {
     this.boundingBox.topLeft = c.position;
-    this.light.sendCommand(c);
   }
 
   private zoom(c: ZoomCommand) {

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

@@ -1,5 +1,4 @@
 import { vec2 } from 'gl-matrix';
-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';
@@ -10,22 +9,28 @@ import { Physics } from '../../physics/physics';
 import { GameObject } from '../game-object';
 import { Camera } from './camera';
 import { IShape } from '../../shapes/i-shape';
-import { rotate90Deg } from '../../helper/rotate-90-deg';
-import { max } from 'gl-matrix/src/gl-matrix/vec2';
+import { Blob } from '../../shapes/types/blob';
+import { RenderCommand } from '../../drawing/commands/render';
+import { DrawableBlob } from '../../drawing/drawables/drawable-blob';
+import { Lamp } from './lamp';
 
 export class Character extends GameObject {
   private keysDown: Set<string> = new Set();
 
-  private shape: Circle;
+  private shape: DrawableBlob;
   private static speed = 1.5;
 
-  constructor(private physics: Physics, private camera: Camera) {
+  constructor(
+    private physics: Physics,
+    private camera: Camera,
+    private light: Lamp
+  ) {
     super();
 
-    this.shape = new Circle();
-    this.shape.radius = 80;
+    this.shape = new DrawableBlob(vec2.create());
 
     this.addCommandExecutor(StepCommand, this.stepHandler.bind(this));
+    this.addCommandExecutor(RenderCommand, this.draw.bind(this));
     this.addCommandExecutor(TeleportToCommand, (c) =>
       this.setPosition(c.position)
     );
@@ -38,6 +43,10 @@ export class Character extends GameObject {
     });
   }
 
+  private draw(c: RenderCommand) {
+    c.renderer.drawShape(this.shape);
+  }
+
   private tryMoving(delta: vec2, isFirstIteration = true) {
     const maxStep = 2;
     if (vec2.length(delta) > maxStep) {
@@ -95,7 +104,7 @@ export class Character extends GameObject {
   }
 
   private getNearShapesTo(
-    shape: Circle
+    shape: Blob
   ): Array<{ shape: IShape; distance: number }> {
     return this.physics
       .findIntersecting(shape.boundingBox)
@@ -108,8 +117,10 @@ export class Character extends GameObject {
   }
 
   private setPosition(value: vec2) {
-    this.shape.center = value;
-    this.camera.sendCommand(new MoveToCommand(this.shape.center));
+    this.shape.position = value;
+    this.camera.sendCommand(new MoveToCommand(value));
+    vec2.add(value, value, vec2.fromValues(80, 0));
+    this.light.sendCommand(new MoveToCommand(value));
   }
 
   public stepHandler(c: StepCommand) {

frontend/src/scripts/objects/world/create-character.ts

@@ -17,8 +17,8 @@ export const createCharacter = (
     2
   );
 
-  const camera = new Camera(physics, light);
-  const character = new Character(physics, camera);
+  const camera = new Camera();
+  const character = new Character(physics, camera, light);
   objects.addObject(light);
   objects.addObject(camera);
   objects.addObject(character);

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

@@ -0,0 +1,73 @@
+import { vec2 } from 'gl-matrix';
+import { IShape } from '../i-shape';
+import { BoundingBox } from '../bounding-box';
+import { Circle } from './circle';
+import { settings } from '../../drawing/settings';
+
+export class Blob implements IShape {
+  private static readonly boundingCircleRadius = 19;
+  private static readonly headOffset = vec2.fromValues(0, 15);
+  private static readonly torsoOffset = vec2.fromValues(0, 0);
+  private static readonly leftFootOffset = vec2.fromValues(-5, -10);
+  private static readonly rightFootOffset = vec2.fromValues(5, -10);
+
+  public readonly isInverted = false;
+
+  protected boundingCircle = new Circle(
+    vec2.create(),
+    Blob.boundingCircleRadius
+  );
+  protected head = new Circle(vec2.create(), settings.shaderMacros.headRadius);
+  protected torso = new Circle(
+    vec2.create(),
+    settings.shaderMacros.torsoRadius
+  );
+  protected leftFoot = new Circle(
+    vec2.create(),
+    settings.shaderMacros.footRadius
+  );
+  protected rightFoot = new Circle(
+    vec2.create(),
+    settings.shaderMacros.footRadius
+  );
+
+  public constructor(center: vec2) {
+    this.position = center;
+  }
+
+  public set position(value: vec2) {
+    vec2.copy(this.boundingCircle.center, value);
+    vec2.add(this.head.center, value, Blob.headOffset);
+    vec2.add(this.torso.center, value, Blob.torsoOffset);
+    vec2.add(this.leftFoot.center, value, Blob.leftFootOffset);
+    vec2.add(this.rightFoot.center, value, Blob.rightFootOffset);
+  }
+
+  public get center(): vec2 {
+    return this.boundingCircle.center;
+  }
+
+  public get radius(): number {
+    return this.boundingCircle.radius;
+  }
+
+  public distance(target: vec2): number {
+    return this.boundingCircle.distance(target);
+  }
+
+  public normal(from: vec2): vec2 {
+    return this.boundingCircle.normal(from);
+  }
+
+  public get boundingBox(): BoundingBox {
+    return this.boundingCircle.boundingBox;
+  }
+
+  public isInside(target: vec2): boolean {
+    return this.distance(target) < 0;
+  }
+
+  public clone(): Blob {
+    return new Blob(this.boundingCircle.center);
+  }
+}