此JavaScript代码是否遵循Midpoint Displacement算法？

function generateTerrain(width, height, midpointDisplacement) {
  const terrain = new Array(width).fill().map(() => new Array(height).fill(0));
  const midpoint = { x: Math.floor(width / 2), y: Math.floor(height / 2) };

  function generate(x, y, size) {
    if (size === 1) {
      terrain[x][y] = midpointDisplacement;
    } else {
      const halfSize = size / 2;
      const midpointX = Math.floor(x + halfSize);
      const midpointY = Math.floor(y + halfSize);

      terrain[midpointX][midpointY] = terrain[x][y] + (Math.random() * 2 - 1) * midpointDisplacement;

      generate(x, y, halfSize);
      generate(x, midpointY, halfSize);
      generate(midpointX, y, halfSize);
      generate(midpointX, midpointY, halfSize);
    }
  }

  generate(0, 0, width);

  return terrain;
}