Function setupLightArena

examples/renderer-test/main.ts:300–323

()

// shadow interaction. Animated lights orbit the center.

function setupLightArena(): void {
  const cx = 28.0;

  // Central pillar
  placeCube(cx, 2.5, 0, 1.5, 5, 1.5, 0.85, 0.85, 0.85, 0.3, 0.0);

  // Surrounding spheres (white, varying roughness)
  const count = 8;
  for (let i = 0; i < count; i = i + 1) {
    const angle = TWO_PI * i / count;
    const x = cx + Math.cos(angle) * 6;
    const z = Math.sin(angle) * 6;
    const roughness = 0.05 + 0.95 * i / (count - 1);
    placeSphere(x, 0.8, z, 1.4, 0.9, 0.9, 0.9, roughness, 0.0);
  }

  // Floor disc (dark, metallic — to catch reflections when SSR lands)
  placeCube(cx, -0.05, 0, 16, 0.1, 16, 0.05, 0.05, 0.07, 0.1, 1.0);

  // Smaller metallic accents
  placeSphere(cx - 3, 0.5, -3, 0.8, 0.95, 0.93, 0.88, 0.05, 1.0);
  placeSphere(cx + 3, 0.5, 3, 0.8, 1.0, 0.76, 0.33, 0.1, 1.0);
  placeSphere(cx, 0.5, -5, 0.8, 0.95, 0.64, 0.54, 0.15, 1.0);
}

// ============================================================
// Zone 3: Shadow Quality (centered at x=-28)