Learn OpenGL's rectangular box under Python

Https://learnopengl.com/Getting-started/Hello-Triangle implements the simplest shader, the translated version of which is shown in the corresponding Chinese tutorial

The following is a python implementation of the C + + code in the tutorial above:

#!/usr/bin/env python#-*-coding:utf-8-*-Importsys, OSImportOpengl.gl as GLImportGLFWImportNumPy as Npwin_width= 800Win_height= 600Vertexshadersource="""#version corelayout (location = 0) in vec3 apos;void main () {gl_position = Vec4 (apos.x, Apos.y, Apos.z, 1.0);} """Fragmentshadersource="""#version coreout vec4 fragcolor;void Main () {Fragcolor = VEC4 (1.0, 0.5, 0.2, 1.0);}"""vertices= Np.array ([0.5, 0.5, 0,0.5,-0.5, 0,-0.5,-0.5, 0,-0.5, 0.5, 0], Dtype =np.float32) Indices= Np.array ([0.0, 1, 3,                    1, 2, 3], Dtype =Np.uint32)defframebuffer_size_callback (window, width, height): gl.glviewport (0, 0, width, height)defprocessinput (window):ifGlfw.glfwgetkey (window, GLFW. Glfw_key_escape) = =GLFW. GLFW_PRESS:glfw.glfwSetWindowShouldClose ()ifGlfw.glfwgetkey (window, GLFW. Glfw_key_left) = =GLFW. GLFW_PRESS:gl.glPolygonMode (Gl.gl_front_and_back, Gl.gl_fill)ifGlfw.glfwgetkey (window, GLFW. glfw_key_right) = =GLFW. GLFW_PRESS:gl.glPolygonMode (Gl.gl_front_and_back, Gl.gl_line)defMain (): Glfw.glfwinit () Glfw.glfwwindowhint (GLFW. Glfw_context_version_major,3) Glfw.glfwwindowhint (GLFW. Glfw_context_version_minor,3) Glfw.glfwwindowhint (GLFW. Glfw_opengl_profile, GLFW. glfw_opengl_core_profile) window= Glfw.glfwcreatewindow (Win_width, Win_height,"Learning OpenGL". Encode (), 0, 0)ifwindow = =0:Print("failed to create window") glfw.glfwterminate () glfw.glfwmakecontextcurrent (window) glfw.glfwsetframebuffersizecallback (window, FR Amebuffer_size_callback) VertexShader=Gl.glcreateshader (Gl.gl_vertex_shader) Gl.glshadersource (vertexshader, Vertexshadersource) gl.glCompileShader (vertexshader) Fragmentshader=Gl.glcreateshader (Gl.gl_fragment_shader) Gl.glshadersource (Fragmentshader, Fragmentshadersource) Gl.glcompileshader (fragmentshader) Shaderprogram=Gl.glcreateprogram () gl.glattachshader (Shaderprogram, VertexShader) Gl.glattachshader (ShaderProgram, FragmentS Hader) Gl.gllinkprogram (Shaderprogram) gl.gldeleteshader (vertexshader) gl.gldeleteshader (fragmentShader) VAO /c3>= Gl.glgenvertexarrays (1) VBO, EBO= Gl.glgenbuffers (2) Gl.glbindvertexarray (VAO) gl.glbindbuffer (Gl.gl_array_buffer, VBO) gl.glbufferdata (Gl.gl_array_buffer, sys. Getsizeof (vertices), vertices, Gl.gl_static_draw) gl.glbindbuffer (Gl.gl_element_array_buffer, EBO) Gl.glbufferdata ( Gl.gl_element_array_buffer, sys.getsizeof (indices), indices, Gl.gl_static_draw) Gl.glvertexattribpointer ( Gl.glgetattriblocation (Shaderprogram,'APos'), 3, Gl.gl_float, Gl.gl_false, 12, None) gl.glenablevertexattribarray (0) gl.glbindbuffer (gl.gl_array_buffer, 0) gl.glbindvertexarray (0)  while  notglfw.glfwwindowshouldclose (window): processinput (window) Gl.glclearcolor (0.2, 0.3, 0.3, 1.0) gl.glclear (gl.gl_color_buffer_bit) Gl.gluseprogram (Shaderprogram) Gl.glbindvertexarray (VAO) Gl.gldrawelements (Gl.gl_triangles, Len (indices), Gl.gl_unsigned_int, None)#gl.gldrawarrays (gl.gl_triangles, 0, 3)glfw.glfwswapbuffers (window) glfw.glfwpollevents () glfw.glfwterminate ()if __name__=="__main__": Main ()

The code performs the following effects:

Keyboard keys to control the switch between Gl_fill and Gl_line modes

Learn OpenGL's rectangular box under Python