Improve gameplay

backend/src/objects/circle-physical.ts

@@ -30,10 +30,6 @@ export class CirclePhysical implements Circle, DynamicPhysical, ReactsToCollisio
     this.recalculateBoundingBox();
   }
 
-  public calculateUpdates(): UpdateObjectMessage | null {
-    return null;
-  }
-
   public get boundingBox(): BoundingBoxBase {
     return this._boundingBox;
   }

backend/src/objects/planet-physical.ts

@@ -9,23 +9,28 @@ import {
   serializesTo,
   settings,
   PlanetBase,
+  CharacterTeam,
+  UpdateObjectMessage,
 } from 'shared';
 
 import { ImmutableBoundingBox } from '../physics/bounding-boxes/immutable-bounding-box';
 import { StaticPhysical } from '../physics/physicals/static-physical';
+import { UpdateGameObjectMessage } from '../update-game-object-message';
 
 @serializesTo(PlanetBase)
 export class PlanetPhysical extends PlanetBase implements StaticPhysical {
   public readonly canCollide = true;
   public readonly canMove = false;
-  private center: vec2;
+
+  public static neutralPlanetCount = 0;
+  public static declaPlanetCount = 0;
+  public static redPlanetCount = 0;
 
   private _boundingBox?: ImmutableBoundingBox;
 
   constructor(vertices: Array<vec2>) {
     super(id(), vertices);
-    this.center = vertices.reduce((sum, v) => vec2.add(sum, sum, v), vec2.create());
-    vec2.scale(this.center, this.center, 1 / vertices.length);
+    PlanetPhysical.neutralPlanetCount++;
   }
 
   public distance(target: vec2): number {
@@ -62,6 +67,47 @@ export class PlanetPhysical extends PlanetBase implements StaticPhysical {
     return sign * d;
   }
 
+  public calculateUpdates(): UpdateObjectMessage {
+    return new UpdateGameObjectMessage(this, ['ownership']);
+  }
+
+  public takeControl(team: CharacterTeam, deltaTime: number) {
+    const previousOwnership = this.ownership;
+    if (team === CharacterTeam.decla) {
+      this.ownership -= (0.5 / settings.takeControlTimeInSeconds) * deltaTime;
+      if (
+        previousOwnership >= 0.5 - settings.planetControlThreshold &&
+        this.ownership < 0.5 - settings.planetControlThreshold
+      ) {
+        PlanetPhysical.declaPlanetCount++;
+        PlanetPhysical.neutralPlanetCount--;
+      } else if (
+        previousOwnership > 0.5 + settings.planetControlThreshold &&
+        previousOwnership <= 0.5 + settings.planetControlThreshold
+      ) {
+        PlanetPhysical.redPlanetCount--;
+        PlanetPhysical.neutralPlanetCount++;
+      }
+    } else {
+      this.ownership += (0.5 / settings.takeControlTimeInSeconds) * deltaTime;
+      if (
+        previousOwnership < 0.5 + settings.planetControlThreshold &&
+        this.ownership >= 0.5 + settings.planetControlThreshold
+      ) {
+        PlanetPhysical.redPlanetCount++;
+        PlanetPhysical.neutralPlanetCount--;
+      } else if (
+        previousOwnership <= 0.5 - settings.planetControlThreshold &&
+        previousOwnership > 0.5 + settings.planetControlThreshold
+      ) {
+        PlanetPhysical.declaPlanetCount--;
+        PlanetPhysical.neutralPlanetCount++;
+      }
+    }
+
+    this.ownership = clamp01(this.ownership);
+  }
+
   public get boundingBox(): ImmutableBoundingBox {
     if (!this._boundingBox) {
       const { xMin, xMax, yMin, yMax } = this.vertices.reduce(

backend/src/objects/player-character-physical.ts

@@ -9,6 +9,7 @@ import {
   GameObject,
   Circle,
   PlayerCharacterBase,
+  CharacterTeam,
 } from 'shared';
 import { DynamicPhysical } from '../physics/physicals/dynamic-physical';
 import { CirclePhysical } from './circle-physical';
@@ -32,6 +33,8 @@ export class PlayerCharacterPhysical
 
   private static readonly headRadius = 50;
   private static readonly feetRadius = 20;
+  private projectileStrength = settings.playerMaxStrength;
+
   // offsets are meassured from (0, 0)
   private static readonly desiredHeadOffset = vec2.fromValues(0, 65);
   private static readonly desiredLeftFootOffset = vec2.fromValues(-20, 0);
@@ -93,10 +96,11 @@ export class PlayerCharacterPhysical
   constructor(
     name: string,
     public readonly colorIndex: number,
+    team: CharacterTeam,
     private readonly container: PhysicalContainer,
     startPosition: vec2,
   ) {
-    super(id(), name, colorIndex);
+    super(id(), name, colorIndex, team, settings.playerMaxHealth);
 
     this.head = new CirclePhysical(
       vec2.add(vec2.create(), startPosition, PlayerCharacterPhysical.headOffset),
@@ -129,7 +133,7 @@ export class PlayerCharacterPhysical
   }
 
   public calculateUpdates(): UpdateObjectMessage {
-    return new UpdateGameObjectMessage(this, ['head', 'leftFoot', 'rightFoot']);
+    return new UpdateGameObjectMessage(this, ['head', 'leftFoot', 'rightFoot', 'health']);
   }
 
   public handleMovementAction(c: MoveActionCommand) {
@@ -137,12 +141,44 @@ export class PlayerCharacterPhysical
   }
 
   public onCollision(other: GameObject) {
-    if (other instanceof ProjectilePhysical) {
+    if (other instanceof ProjectilePhysical && other.team !== this.team) {
       other.destroy();
-      this.destroy();
+      this.health -= other.strength;
+      if (this.health <= 0) {
+        this.destroy();
+      }
     }
   }
 
+  public shootTowards(position: vec2) {
+    if (!this.isAlive) {
+      return;
+    }
+
+    const start = vec2.clone(this.center);
+    const direction = vec2.subtract(vec2.create(), position, start);
+    vec2.normalize(direction, direction);
+    vec2.add(
+      start,
+      start,
+      vec2.scale(vec2.create(), direction, settings.projectileStartOffset),
+    );
+    const velocity = vec2.scale(direction, direction, settings.projectileSpeed);
+    vec2.add(velocity, velocity, this.velocity);
+    const strength = this.projectileStrength / 2;
+    this.projectileStrength -= strength;
+    const projectile = new ProjectilePhysical(
+      start,
+      20,
+      this.colorIndex,
+      strength,
+      this.team,
+      velocity,
+      this.container,
+    );
+    this.container.addObject(projectile);
+  }
+
   public get boundingBox(): BoundingBoxBase {
     this.bound.center = this.head.center;
     return this.bound.boundingBox;
@@ -197,6 +233,13 @@ export class PlayerCharacterPhysical
       this.currentPlanet = undefined;
     }
 
+    this.projectileStrength = Math.min(
+      settings.playerMaxStrength,
+      this.projectileStrength + settings.playerStrengthRegenerationPerSeconds * deltaTime,
+    );
+
+    this.currentPlanet?.takeControl(this.team, deltaTime);
+
     const intersectingWithForcefield = this.container.findIntersecting(
       getBoundingBoxOfCircle(
         new Circle(
@@ -205,7 +248,13 @@ export class PlayerCharacterPhysical
         ),
       ),
     );
-    const actualGravity = forceAtPosition(this.center, intersectingWithForcefield);
+    const feetCenter = vec2.add(
+      vec2.create(),
+      this.leftFoot.center,
+      this.rightFoot.center,
+    );
+    vec2.scale(feetCenter, feetCenter, 0.5);
+    const actualGravity = forceAtPosition(feetCenter, intersectingWithForcefield);
 
     const direction = this.averageAndResetMovementActions();
     const movementForce = vec2.scale(direction, direction, settings.maxAcceleration);
@@ -269,7 +318,7 @@ export class PlayerCharacterPhysical
 
   private springMove(object: CirclePhysical, center: vec2, offset: vec2) {
     // todo: make time-independent
-    const springConstant = 0.35;
+    const springConstant = 0.55;
 
     const desiredPosition = vec2.add(vec2.create(), center, offset);
     vec2.rotate(desiredPosition, desiredPosition, center, this.direction);

backend/src/objects/projectile-physical.ts

@@ -1,5 +1,12 @@
 import { vec2 } from 'gl-matrix';
-import { id, settings, serializesTo, ProjectileBase, GameObject } from 'shared';
+import {
+  id,
+  settings,
+  serializesTo,
+  ProjectileBase,
+  GameObject,
+  CharacterTeam,
+} from 'shared';
 import { ImmutableBoundingBox } from '../physics/bounding-boxes/immutable-bounding-box';
 import { CirclePhysical } from './circle-physical';
 import { DynamicPhysical } from '../physics/physicals/dynamic-physical';
@@ -8,6 +15,7 @@ import { PlanetPhysical } from './planet-physical';
 import { ReactsToCollision } from '../physics/physicals/reacts-to-collision';
 import { UpdateObjectMessage } from 'shared/lib/src/objects/update-object-message';
 import { UpdateGameObjectMessage } from '../update-game-object-message';
+import { PlayerCharacterPhysical } from './player-character-physical';
 
 @serializesTo(ProjectileBase)
 export class ProjectilePhysical
@@ -15,6 +23,7 @@ export class ProjectilePhysical
   implements DynamicPhysical, ReactsToCollision {
   public readonly canCollide = true;
   public readonly canMove = true;
+
   private isDestroyed = false;
   private bounceCount = 0;
   private _boundingBox?: ImmutableBoundingBox;
@@ -24,15 +33,18 @@ export class ProjectilePhysical
   constructor(
     center: vec2,
     radius: number,
+    colorIndex: number,
+    public strength: number,
+    public team: CharacterTeam,
     private velocity: vec2,
     readonly container: PhysicalContainer,
   ) {
-    super(id(), center, radius);
+    super(id(), center, radius, colorIndex, strength);
     this.object = new CirclePhysical(center, radius, this, container, 0.9);
   }
 
   public calculateUpdates(): UpdateObjectMessage {
-    return new UpdateGameObjectMessage(this, ['center']);
+    return new UpdateGameObjectMessage(this, ['center', 'strength']);
   }
 
   public get boundingBox(): ImmutableBoundingBox {
@@ -59,12 +71,20 @@ export class ProjectilePhysical
   }
 
   public onCollision(other: GameObject) {
-    if (this.bounceCount++ === settings.projectileMaxBounceCount) {
+    if (
+      !(other instanceof PlayerCharacterPhysical && other.team === this.team) &&
+      this.bounceCount++ === settings.projectileMaxBounceCount
+    ) {
       this.destroy();
     }
   }
 
   public step(deltaTime: number) {
+    if ((this.strength -= settings.projectileFadeSpeed * deltaTime) < 0) {
+      this.destroy();
+      return;
+    }
+
     const gravity = vec2.create();
     const intersecting = this.container.findIntersecting(this.boundingBox);
     intersecting.forEach((i) => {