渲染OBJ pyopengl

Question

请问我在过去的几个月里一直在尝试这种方法，但是一切都以我为例，我尝试了很多在线资源来读取和显示没有MTl内容的OBJ文件，但我写的代码仍然出错，所以我终于找到了自己的代码可以读取任何面孔类型的obj文件，例如（v // vn）（v / by / vn）（v），我希望您理解这一点。 读取文件后，我没有任何错误，但是使用pyopengl渲染时没有任何错误，但是该对象未显示。请检查我的obj loader代码以及屏幕上的opengl代码，并在另一个屏幕截图中显示结果。 注意我没有错误，我不知道我是否在obj loader中写了什么错误，但是请检查并帮助我。 OBJ代码：

from OpenGL.GL import *
from pyopengltk import OpenGLFrame
class OBJ:
    def __init__(self,filename):
    self.faces = []
    self.vertices = []
    with open(filename, 'r') as f:
        lines = f.readlines()
        #print(lines)
        if lines:
            for line in lines:
                if line[0] == 'v':
                    index1 = line.find(' ')
                    index2 = line.find(' ', index1+1)
                    index3 = line.find(' ', index2+1)

                    v1 = float(line[index1: index2])
                    v2 = float(line[index2: index3])
                    v3 = float(line[index3:])
                    self.vertices.append((v1,v2,v3))
                    #print(self.vertices)
        for line in open(filename, "r"):
            face = []
            texcoords = []
            norms = []
            if line.startswith('#'): continue
            values = line.split()
            #print(values)
            if not values: continue
            if values[0] == 'v':continue
            elif values[0] == 'vn':continue
            elif values[0] == 'vt':continue
            if values[0] == 'f':
                for v in values[1:]:
                    #print(len(v))
                    if len(v) == 4:
                        if ['/' for s in values[1:]]:
                            w = v.split('//')
                            face.append(int(w[0]))
                            norms.append(int(w[1]))
                            self.faces.extend(tuple((face, norms)))
                            #self.faces = [y for x in self.faces for y in x]
                            #print(self.faces)
                            glBegin(GL_QUADS)
                            glColor3f(0,1,1)
                            for surface in self.faces:
                                for vertex in surface:
                                    glVertex3fv(self.vertices[vertex])
                            glEnd
                        else:
                            self.faces.append(v)
                            glBegin(GL_QUADS)
                            glColor3f(0,1,1)
                            for surface in self.faces:
                                for vertex in surface:
                                    glVertex3fv(self.vertices[vertex])
                            glEnd
                            print(self.faces)
                    elif len(v) == 3:
                        w = v.split('/')
                        face.append(int(w[0]))
                        texcoords.append(int(w[1]))
                        norms.append(int(w[2]))
                        self.faces.append((face, norms, texcoord))
                        glBegin(GL_TRIANGLES)
                        glColor3f(0,1,1)
                        for surface in self.faces:
                            for vertex in surface:
                                glVertex3fv(self.vertices[vertex])
                        glEnd
                        #print('v/vt/vn')
                        print(self.faces)
#to run this code just use file path to any obj file on your pc
#OBJ('filename_path')
                    

渲染代码

import tkinter as tk
from OpenGL.GL import *
from OpenGL.GLU import *
from pyopengltk import OpenGLFrame
from obj import *

class frame(OpenGLFrame):

  def initgl(self):
        glViewport(0,0,self.width,self.height)
        glClearColor(0.902,0.902,1,0.0)
        glMatrixMode(GL_PROJECTION)
        glLoadIdentity()
        #glOrtho(-10,10,-10,10,-10,10)
        gluPerspective(60, self.width/self.height,0.1,100.0)
        glEnable(GL_DEPTH_TEST)
        glEnable(GL_BLEND)
        glEnable(GL_CULL_FACE)
        glMatrixMode(GL_MODELVIEW)
        glLoadIdentity()
        
  
  def redraw(self):
        glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT)
        glBlendFunc(GL_SRC_ALPHA,GL_ONE_MINUS_SRC_ALPHA)
        OBJ('C:\\Users\\DANIEL\\Desktop\\v-cam\\me.obj')
        #that is what I did here obj suff
        glMatrixMode(GL_MODELVIEW)
        glLoadIdentity()
        gluLookAt(0,-10,0,0,0,0,1,0,20)
        

root = tk.Tk()
app = frame(root, width=900, height=600)
app.pack(fill=tk.BOTH,expand=tk.YES)
app.mainloop()

Answer 1

我建议使用您在先前的一个问题（Pyopengl reading obj file）中介绍的对象加载器。

在OBJ中创建一个initgl实例：

self.obj =  OBJ('C:\\Users\\DANIEL\\Desktop\\v-cam\\me.obj')

然后使用glCallList在redraw中绘制网格。

glCallList(self.obj.gl_list)

frame类：

class frame(OpenGLFrame):

    def initgl(self):
        glViewport(0,0,self.width,self.height)
        glClearColor(0.902,0.902,1,0.0)
        glMatrixMode(GL_PROJECTION)
        glLoadIdentity()
        #glOrtho(-10,10,-10,10,-10,10)
        gluPerspective(60, self.width/self.height,0.1,100.0)
        glEnable(GL_DEPTH_TEST)
        glEnable(GL_BLEND)
        glEnable(GL_CULL_FACE)
        glMatrixMode(GL_MODELVIEW)
        glLoadIdentity()
        self.obj =  OBJ('C:\\Users\\DANIEL\\Desktop\\v-cam\\me.obj')
  
    def redraw(self):
        glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT)
        glBlendFunc(GL_SRC_ALPHA,GL_ONE_MINUS_SRC_ALPHA)
        #that is what I did here obj suff
        glMatrixMode(GL_MODELVIEW)
        glLoadIdentity()
        gluLookAt(0,-10,0,0,0,0,1,0,20) 

        glCallList(self.obj.gl_list)