Update render/speedup.py

render/speedup.py

@@ -35,17 +35,8 @@ def cross_product(a0, a1, a2, b0, b1, b2):
     return x,y,z
 
 
-# @cython.boundscheck(False)
 def generate_faces(triangles, width, height):
-    """ draw the triangle faces with z buffer
 
-    Args:
-        triangles: groups of vertices
-
-    FYI:
-        * zbuffer, https://github.com/ssloy/tinyrenderer/wiki/Lesson-3:-Hidden-faces-removal-(z-buffer)
-        * uv mapping and perspective correction
-    """
     i, j, k, length     = 0, 0, 0, 0
     bcy, bcz, x, y, z   = 0.,0.,0.,0.,0.
     a, b, c             = [0.,0.,0.],[0.,0.,0.],[0.,0.,0.]
@@ -68,7 +59,7 @@ def generate_faces(triangles, width, height):
         pixels = []
         for j in range(minx, maxx + 2):
             for k in range(miny - 1, maxy + 2):
-                # 必须显式转换成 double 参与底下的运算，不然结果是错的
+                
                 x = j
                 y = k
 
@@ -80,18 +71,14 @@ def generate_faces(triangles, width, height):
                 else:
                     continue
 
-                # here, -0.00001 because of the precision lose
                 if bc[0] < -0.00001 or bc[1] < -0.00001 or bc[2] < -0.00001:
                     continue
 
                 z = 1 / (bc[0] / a[2] + bc[1] / b[2] + bc[2] / c[2])
 
-                # Blender 导出来的 uv 数据，跟之前的顶点数据有一样的问题，Y轴是个反的，
-                # 所以这里的纹理图片要旋转一下才能 work
                 v = (uva[0] * bc[0] / a[2] + uvb[0] * bc[1] / b[2] + uvc[0] * bc[2] / c[2]) * z * width
                 u = height - (uva[1] * bc[0] / a[2] + uvb[1] * bc[1] / b[2] + uvc[1] * bc[2] / c[2]) * z * height
 
-                # https://en.wikipedia.org/wiki/Pairing_function
                 idx = ((x + y) * (x + y + 1) + y) / 2
                 if zbuffer.get(idx) is None or zbuffer[idx] < z:
                     zbuffer[idx] = z