diff --git a/rainbow.py b/rainbow.py
index 67d7c06..db3c510 100644
--- a/rainbow.py
+++ b/rainbow.py
@@ -105,7 +105,7 @@ def water_refraction_index(t, wavelength):
 def sun_spectral(wavelength):
 	return 1e16/(np.power(wavelength,5)*(np.exp(6.62607015e6*2.99792458/(wavelength*1.380649*(5250+273.15)))-1))
 
-def modified_trace(wavelength, temp, center, r, dx, N, n_theta, d_theta, min_intensity, max_ray, max_angle):
+def modified_trace(wavelength, temp, center, r, N, n_theta, d_theta, min_intensity, max_ray, max_angle):
 	n = water_refraction_index(temp, wavelength)
 	disk = Disk(center, r, n)
 	stack = []
@@ -150,7 +150,7 @@ def rainbow(n_theta, max_theta, temp):
 
 		# 使用 ThreadPoolExecutor 并行执行
 		with ProcessPoolExecutor() as executor:
-			futures = [executor.submit(modified_trace, wavelength, temp, center, r, dx, N, n_theta, d_theta, min_intensity, max_ray, max_theta) for wavelength in colorspace.data_wavelength]
+			futures = [executor.submit(modified_trace, wavelength, temp, center, r, N, n_theta, d_theta, min_intensity, max_ray, max_theta) for wavelength in colorspace.data_wavelength]
 
 			for future in as_completed(futures):
 				result = future.result()