initial commit

resources/js/game/Zombie.js

@@ -0,0 +1,377 @@
+import { GameObject } from '../engine/GameObject.js';
+import { Vector2D } from '../engine/Vector2D.js';
+
+export class Zombie extends GameObject {
+  constructor(
+    x,
+    y,
+    target,
+    {
+      container,
+      viewport,
+      speed = 110,
+      size = 24,
+      color = [0.15, 0.65, 0.2, 1],
+      health = 1,
+      knockback = 260,
+      knockbackDamping = 10,
+      scoreValue = 1,
+      emergeTime = 0,
+      onDeath = null,
+    } = {},
+  ) {
+    super(x, y);
+    this.target = target;
+    this.container = container;
+    this.viewport = viewport;
+    this.speed = speed;
+    this.size = size;
+    this.baseColor = [...color];
+    this.health = health;
+    this.maxHealth = health;
+    this.knockback = knockback;
+    this.knockbackDamping = knockbackDamping;
+    this.scoreValue = scoreValue;
+    this.onDeath = onDeath;
+    this._hitKnockback = new Vector2D(0, 0);
+    this._flash = 0;
+    this._time = 0;
+    this._broken = Math.random() * Math.PI * 2;
+    this._emergeTotal = emergeTime;
+    this._emerge = emergeTime;
+    this.width = size;
+    this.height = size;
+  }
+
+  die() {
+    if (this.onDeath) {
+      this.onDeath(this);
+    }
+    this.remove(this.container);
+  }
+
+  hit(impulse, damage = 1) {
+    this.health -= damage;
+    this._hitKnockback = impulse.mulS(this.knockback);
+    this._flash = 0.08;
+    return this.health <= 0;
+  }
+
+  update(dt) {
+    this._time += dt;
+    if (this._updateEmerge(dt)) return;
+    const delta = this.target.pos.subV(this.pos);
+    const distance = delta.length();
+    let chaseVelocity = new Vector2D(0, 0);
+    if (distance > 1) {
+      chaseVelocity = delta.divS(distance).mulS(this.speed);
+    }
+
+    this.velocity = chaseVelocity.addV(this._hitKnockback);
+    super.update(dt);
+
+    this._hitKnockback = this._hitKnockback.mulS(Math.max(0, 1 - dt * this.knockbackDamping));
+    this._flash = Math.max(0, this._flash - dt);
+  }
+
+  _updateEmerge(dt) {
+    if (this._emerge <= 0) return false;
+    this._emerge -= dt;
+    if (this._emerge <= 0) {
+      this._emerge = 0;
+      if (this._onEmergenceComplete) this._onEmergenceComplete();
+    }
+    return true;
+  }
+
+  _emergeSize() {
+    if (this._emerge > 0 && this._emergeTotal > 0) {
+      return 0.3 + 0.7 * (1 - this._emerge / this._emergeTotal);
+    }
+    return 1;
+  }
+
+  _drawEmerge(renderer) {
+    if (this._emerge <= 0) return;
+    const gear = 1 - this._emerge / this._emergeTotal;
+    renderer.setBlendMode('additive');
+    const g = this.size * (3.4 - gear * 1.4);
+    renderer.drawTexture(
+      renderer.glowTexture,
+      this.pos.x - g / 2,
+      this.pos.y - g / 2,
+      g,
+      g,
+      [this.baseColor[0], this.baseColor[1], this.baseColor[2], 0.5 * (1 - gear)],
+    );
+    renderer.setBlendMode('normal');
+  }
+
+  draw(renderer) {
+    this.width = this.size;
+    this.height = this.size;
+
+    let color = this.baseColor;
+    if (this._flash > 0) {
+      color = [1, 1, 1, 1];
+    } else if (this.maxHealth > 1) {
+      const hpRatio = this.health / this.maxHealth;
+      color = [
+        this.baseColor[0] + (1 - this.baseColor[0]) * (1 - hpRatio),
+        this.baseColor[1] * hpRatio,
+        this.baseColor[2] * hpRatio,
+        1,
+      ];
+    }
+
+    if (this.maxHealth > 1) {
+      this._drawJuggernaut(renderer, color);
+      return;
+    }
+
+    this._drawEmerge(renderer);
+    const s = this.size * this._emergeSize();
+    const lean = s <= 16;
+    const facing = Math.atan2(
+      this.target.pos.y - this.pos.y,
+      this.target.pos.x - this.pos.x,
+    );
+    const cosF = Math.cos(facing);
+    const sinF = Math.sin(facing);
+    const walk = Math.sin(this._time * (lean ? 14 : 10) + this._broken);
+
+    const shade = [color[0] * 0.6, color[1] * 0.6, color[2] * 0.6, 1];
+    const shadeDark = [color[0] * 0.38, color[1] * 0.38, color[2] * 0.38, 1];
+    const light = [
+      Math.min(1, color[0] + 0.25),
+      Math.min(1, color[1] + 0.25),
+      Math.min(1, color[2] + 0.25),
+      1,
+    ];
+
+    const drawLimb = (ax, ay, bx, by, thickness, limbColor) => {
+      const len = Math.hypot(bx - ax, by - ay);
+      if (len < 1) return;
+      renderer.drawTexture(
+        renderer.whiteTexture,
+        (ax + bx) / 2 - len / 2,
+        (ay + by) / 2 - thickness / 2,
+        len,
+        thickness,
+        limbColor,
+        Math.atan2(by - ay, bx - ax),
+      );
+    };
+
+    if (!lean) {
+      renderer.drawTexture(
+        renderer.whiteTexture,
+        this.pos.x - s * 0.62,
+        this.pos.y - s * 0.5 + s * 0.06,
+        s * 1.24,
+        s * 0.92,
+        [0, 0, 0, 0.35],
+      );
+    }
+
+    const legLen = s * (lean ? 0.32 : 0.4);
+    const legSpread = s * 0.22;
+    const hipX = this.pos.x - cosF * s * 0.18;
+    const hipY = this.pos.y - sinF * s * 0.18;
+    for (let i = 0; i < 2; i += 1) {
+      const sign = i === 0 ? 1 : -1;
+      const step = sign * walk * s * (lean ? 0.3 : 0.18);
+      const footX = hipX + cosF * legLen - sinF * legSpread * sign + cosF * step;
+      const footY = hipY + sinF * legLen + cosF * legSpread * sign + sinF * step;
+      drawLimb(hipX, hipY, footX, footY, s * 0.15, shadeDark);
+    }
+
+    const torsoW = s * (lean ? 0.5 : 0.62);
+    const torsoH = s * (lean ? 0.46 : 0.55);
+    renderer.drawTexture(
+      renderer.whiteTexture,
+      this.pos.x - torsoW / 2,
+      this.pos.y - torsoH / 2,
+      torsoW,
+      torsoH,
+      color,
+    );
+
+    const armLen = s * 0.5;
+    const armSpread = s * 0.27;
+    for (let i = 0; i < 2; i += 1) {
+      const sign = i === 0 ? 1 : -1;
+      const shX = this.pos.x - sinF * armSpread * sign;
+      const shY = this.pos.y + cosF * armSpread * sign - s * 0.02;
+      const reach = 1 + walk * 0.1;
+      const handX = shX + cosF * armLen * reach;
+      const handY = shY + sinF * armLen * reach;
+      drawLimb(shX, shY, handX, handY, s * 0.17, shade);
+    }
+
+    const headSize = s * (lean ? 0.4 : 0.44);
+    const headX = this.pos.x;
+    const headY = this.pos.y - s * (lean ? 0.34 : 0.4) + walk * s * 0.03;
+    renderer.drawTexture(
+      renderer.whiteTexture,
+      headX - headSize / 2,
+      headY - headSize / 2,
+      headSize,
+      headSize,
+      light,
+    );
+
+    const eyeSize = headSize * 0.2;
+    const eyeSpread = headSize * 0.24;
+    const look = lean ? 0.1 : 0.04;
+    const eyeY = headY + sinF * headSize * look;
+    renderer.drawTexture(
+      renderer.whiteTexture,
+      headX - eyeSize / 2 - sinF * eyeSpread,
+      eyeY - eyeSize / 2 + cosF * eyeSpread,
+      eyeSize,
+      eyeSize,
+      [0.05, 0.05, 0.05, 1],
+    );
+    renderer.drawTexture(
+      renderer.whiteTexture,
+      headX - eyeSize / 2 + sinF * eyeSpread,
+      eyeY - eyeSize / 2 - cosF * eyeSpread,
+      eyeSize,
+      eyeSize,
+      [0.05, 0.05, 0.05, 1],
+    );
+  }
+
+  _drawJuggernaut(renderer, color) {
+    const s = this.size;
+    const facing = Math.atan2(
+      this.target.pos.y - this.pos.y,
+      this.target.pos.x - this.pos.x,
+    );
+    const cosF = Math.cos(facing);
+    const sinF = Math.sin(facing);
+    const walk = Math.sin(this._time * 5 + this._broken);
+
+    const shade = [color[0] * 0.6, color[1] * 0.6, color[2] * 0.6, 1];
+    const shadeDark = [color[0] * 0.38, color[1] * 0.38, color[2] * 0.38, 1];
+    const light = [
+      Math.min(1, color[0] + 0.25),
+      Math.min(1, color[1] + 0.25),
+      Math.min(1, color[2] + 0.25),
+      1,
+    ];
+    const mix = (a, b, t) => a + (b - a) * t;
+
+    renderer.drawTexture(
+      renderer.whiteTexture,
+      this.pos.x - s * 0.78,
+      this.pos.y - s * 0.55 + s * 0.08,
+      s * 1.56,
+      s * 1.14,
+      [0, 0, 0, 0.35],
+    );
+
+    const footSize = s * 0.16;
+    const footBaseY = this.pos.y + s * 0.46;
+    for (let i = 0; i < 2; i += 1) {
+      const sign = i === 0 ? 1 : -1;
+      const stepX = -sinF * s * 0.2 * sign + cosF * walk * s * 0.06 * sign;
+      const stepY = cosF * s * 0.2 * sign + sinF * walk * s * 0.06 * sign;
+      renderer.drawTexture(
+        renderer.whiteTexture,
+        this.pos.x + stepX - footSize / 2,
+        footBaseY + stepY - footSize / 2,
+        footSize,
+        footSize,
+        shadeDark,
+      );
+    }
+
+    const shellW = s * 1.0;
+    const shellH = s * 0.95;
+    const bottomY = this.pos.y + s * 0.4;
+    const topY = this.pos.y - s * 0.5;
+    const layers = 6;
+    for (let i = 0; i < layers; i += 1) {
+      const u = i / (layers - 1);
+      const w = shellW * (1 - u * 0.66);
+      const h = (shellH / layers) * 1.4;
+      const cy = bottomY - u * (bottomY - topY) + walk * s * 0.02;
+      renderer.drawTexture(
+        renderer.whiteTexture,
+        this.pos.x - w / 2,
+        cy - h / 2,
+        w,
+        h,
+        [
+          mix(shadeDark[0], light[0], u),
+          mix(shadeDark[1], light[1], u),
+          mix(shadeDark[2], light[2], u),
+          1,
+        ],
+      );
+    }
+
+    for (let i = 0; i < 3; i += 1) {
+      const rx = this.pos.x + (i - 1) * s * 0.16;
+      renderer.drawTexture(
+        renderer.whiteTexture,
+        rx - s * 0.045,
+        topY + s * 0.04,
+        s * 0.09,
+        shellH * 0.9,
+        shadeDark,
+      );
+    }
+
+    const rivet = s * 0.055;
+    renderer.drawTexture(
+      renderer.whiteTexture,
+      this.pos.x - s * 0.44,
+      bottomY - rivet * 0.4,
+      rivet,
+      rivet,
+      shadeDark,
+    );
+    renderer.drawTexture(
+      renderer.whiteTexture,
+      this.pos.x + s * 0.44 - rivet,
+      bottomY - rivet * 0.4,
+      rivet,
+      rivet,
+      shadeDark,
+    );
+
+    const headSize = s * 0.24;
+    const headX = this.pos.x + cosF * s * 0.52;
+    const headY = this.pos.y + sinF * s * 0.52;
+    renderer.drawTexture(
+      renderer.whiteTexture,
+      headX - headSize / 2,
+      headY - headSize / 2,
+      headSize,
+      headSize,
+      light,
+    );
+
+    const eyeSize = headSize * 0.22;
+    const eyeSpread = headSize * 0.3;
+    renderer.drawTexture(
+      renderer.whiteTexture,
+      headX - eyeSize / 2 - sinF * eyeSpread,
+      headY - eyeSize / 2 + cosF * eyeSpread,
+      eyeSize,
+      eyeSize,
+      [0.05, 0.05, 0.05, 1],
+    );
+    renderer.drawTexture(
+      renderer.whiteTexture,
+      headX - eyeSize / 2 + sinF * eyeSpread,
+      headY - eyeSize / 2 - cosF * eyeSpread,
+      eyeSize,
+      eyeSize,
+      [0.05, 0.05, 0.05, 1],
+    );
+  }
+}