因此，我看了this tutorial（很棒的视频），基本上复制了他的代码。一切进展顺利，所以我决定开始升级。我添加了模型文件（“ .smd”格式），如下所示：
obj:cube1 {
v:1,-2,-2;
v:5,-2,-2;
v:5,2,-2;
v:1,2,-2;
v:1,-2,2;
v:5,-2,2;
v:5,2,2;
v:1,2,2;
e:0,1;
e:1,2;
e:2,3;
e:3,0;
e:4,5;
e:5,6;
e:6,7;
e:7,4;
e:0,4;
e:1,5;
e:2,6;
e:7,3;
f:0,1,2,3:red;
f:4,5,6,7:red;
f:0,1,5,4:red;
f:2,3,7,6:red;
f:0,3,7,4:red;
f:1,2,6,5:red;
}
obj:cube2 {
v:-1,-3,2;
v:1,-3,2;
v:1,-1,2;
v:-1,-1,2;
v:-1,-3,4;
v:1,-3,4;
v:1,-1,4;
v:-1,-1,4;
e:0,1;
e:1,2;
e:2,3;
e:3,0;
e:4,5;
e:5,6;
e:6,7;
e:7,4;
e:0,4;
e:1,5;
e:2,6;
e:7,3;
f:0,1,2,3:yellow;
f:4,5,6,7:yellow;
f:0,1,5,4:yellow;
f:2,3,7,6:yellow;
f:0,3,7,4:yellow;
f:1,2,6,5:yellow;
}
obj:cube3 {
v:0,0,-4;
v:2,0,-4;
v:2,2,-4;
v:0,2,-4;
v:0,0,-2;
v:2,0,-2;
v:2,2,-2;
v:0,2,-2;
e:0,1;
e:1,2;
e:2,3;
e:3,0;
e:4,5;
e:5,6;
e:6,7;
e:7,4;
e:0,4;
e:1,5;
e:2,6;
e:7,3;
f:0,1,2,3:blue;
f:4,5,6,7:blue;
f:0,1,5,4:blue;
f:2,3,7,6:blue;
f:0,3,7,4:blue;
f:1,2,6,5:blue;
}
我使用对象来简化复杂模型文件的定向。 为了使文件可读，我使用了一个编译器，该编译器将创建如下内容：
{'cube1': [[(1, -2, -2), (5, -2, -2), (5, 2, -2), (1, 2, -2), (1, -2, 2), (5, -2, 2), (5, 2, 2), (1, 2, 2)], [(0, 1), (1, 2), (2, 3), (3, 0), (4, 5), (5, 6), (6, 7), (7, 4), (0, 4), (1, 5), (2, 6), (7, 3)], {(0, 1, 2, 3): 'red', (4, 5, 6, 7): 'red', (0, 1, 5, 4): 'red', (2, 3, 7, 6): 'red', (0, 3, 7, 4): 'red', (1, 2, 6, 5): 'red'}], 'cube2': [[(-1, -3, 2), (1, -3, 2), (1, -1, 2), (-1, -1, 2), (-1, -3, 4), (1, -3, 4), (1, -1, 4), (-1, -1, 4)], [(0, 1), (1, 2), (2, 3), (3, 0), (4, 5), (5, 6), (6, 7), (7, 4), (0, 4), (1, 5), (2, 6), (7, 3)], {(0, 1, 2, 3): 'yellow', (4, 5, 6, 7): 'yellow', (0, 1, 5, 4): 'yellow', (2, 3, 7, 6): 'yellow', (0, 3, 7, 4): 'yellow', (1, 2, 6, 5): 'yellow'}], 'cube3': [[(0, 0, -4), (2, 0, -4), (2, 2, -4), (0, 2, -4), (0, 0, -2), (2, 0, -2), (2, 2, -2), (0, 2, -2)], [(0, 1), (1, 2), (2, 3), (3, 0), (4, 5), (5, 6), (6, 7), (7, 4), (0, 4), (1, 5), (2, 6), (7, 3)], {(0, 1, 2, 3): 'blue', (4, 5, 6, 7): 'blue', (0, 1, 5, 4): 'blue', (2, 3, 7, 6): 'blue', (0, 3, 7, 4): 'blue', (1, 2, 6, 5): 'blue'}]}
在线框模式下，一切正常。但是在显示脸部时不起作用。我试图使人脸显示算法与我的多个对象兼容。它仅显示最后一个颜色的第一个对象。在此示例中，它显示带有蓝色面孔的cube1，除此之外没有其他内容。
这是“原始”代码的一部分（我在对象之前使用的那一部分）：
vert_list = []
screen_coords = []
for x, y, z in verts:
x -= cam.pos[0]
y -= cam.pos[1]
z -= cam.pos[2]
x, z = cam.rotate2d((x, z), cam.rot[1])
y, z = cam.rotate2d((y, z), cam.rot[0])
vert_list.append((x, y, z))
f = round((width // 2) / z)
x, y = x * f, y * f
screen_coords.append((currX + x, currY + y))
face_list = []
face_color = []
depth = []
if not WIREFRAME:
for f in range(len(faces)):
face = list(faces)[f]
on_screen = False
for i in face:
x, y = screen_coords[i]
if vert_list[i][2] > 0 and 0 < x < width and y and y < height:
on_screen = True
break
if on_screen:
coords = [screen_coords[i] for i in face]
face_list.append(coords)
face_color += colors[f]
depth.append(sum(sum(vert_list[j][i] for j in face) ** 2 for i in range(3)))
order = sorted(range(len(face_list)), key=lambda i: depth[i], reverse=True)
for i in order:
pygame.draw.polygon(window, face_color[i], face_list[i])
这是我现在正在使用的代码：
vert_list = []
screen_coords = []
for obj in OBJECTS:
name = obj
obj = OBJECTS[name]
verts = obj[0]
for x, y, z in verts:
x -= cam.pos[0]
y -= cam.pos[1]
z -= cam.pos[2]
x, z = cam.rotate2d((x, z), cam.rot[1])
y, z = cam.rotate2d((y, z), cam.rot[0])
vert_list.append((x, y, z))
f = round((width // 2) / z)
x, y = x * f, y * f
screen_coords.append((currX + x, currY + y))
face_list = []
face_color = []
depth = []
for obj in OBJECTS:
name = obj
obj = OBJECTS[name]
faces = obj[2]
if not WIREFRAME:
for f in faces:
face = f
on_screen = False
for i in face:
x, y = screen_coords[i]
if vert_list[i][2] > 0 and 0 < x < width and y and y < height:
on_screen = True
break
if on_screen:
coords = [screen_coords[i] for i in face]
face_list.append(coords)
face_color.append(COLORS_DICT[faces[f]])
depth.append(sum(sum(vert_list[j][i] for j in face) ** 2 for i in range(3)))
order = sorted(range(len(face_list)), key=lambda i: depth[i], reverse=True)
for i in order:
pygame.draw.polygon(window, face_color[i], face_list[i])