Function placeCube

examples/renderer-test/main.ts:239–255

(
  px: number, py: number, pz: number,
  sx: number, sy: number, sz: number,
  cr: number, cg: number, cb: number,
  roughness: number, metalness: number,
)

}

function placeCube(
  px: number, py: number, pz: number,
  sx: number, sy: number, sz: number,
  cr: number, cg: number, cb: number,
  roughness: number, metalness: number,
): number {
  const node = placeNode(cubeHandle, 0, px, py, pz, sx, sy, sz);
  setSceneNodeColor(node, cr, cg, cb);
  setSceneNodePbr(node, roughness, metalness);
  // Thin horizontal slabs (floors) should receive but not cast
  // shadows — otherwise they fill the shadow map with their own
  // depth and everything reads as "in shadow of the ground".
  if (sy <= 0.3) {
    setSceneNodeCastShadow(node, false);
  }
  return node;
}

// ============================================================
// Zone 1: PBR Material Gallery (centered at origin)