マルチテクスチャの動作を確認するためのlessonでした。エラー内容によっては、似た記事があるようですが、解決には至っていないようなので、紹介します。
lesson6向けに行った修正と、mathを読み込み、piなどに対応。
returning None name ‘GL_TEXTURE0_ARB’ is not defined
上記については、DrawGLScene()内の、GL_TEXTURE0_ARBと、GL_TEXTURE1_ARBを、それぞれGL_TEXTURE0、GL_TEXTURE1に置き換えた。
動いたコードを以下に用意しました。
サンプルコード
if __name__ == '__build__':
raise Exception
import string
from OpenGL.GL import *
from OpenGL.GLUT import *
from OpenGL.GLU import *
import sys
from PIL import Image, ImageOps
import math
ESCAPE = '\033'
window = 0
rot = 0.0
def LoadTexture(name):
#global texture
image = Image.open(name)
image = ImageOps.flip(image)
ix, iy = image.size
glBindTexture(GL_TEXTURE_2D, glGenTextures(1))
# Create Texture
id = glGenTextures(1)
glBindTexture(GL_TEXTURE_2D, id) # 2d texture (x and y size)
glPixelStorei(GL_UNPACK_ALIGNMENT,1)
glTexImage2D(GL_TEXTURE_2D, 0, 3, ix, iy, 0, GL_RGB, GL_UNSIGNED_BYTE, image.tobytes())
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP)
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP)
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT)
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT)
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST)
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST)
glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_DECAL)
return id
def InitGL(Width, Height):
global textures, glMultiTexCoord2f, glActiveTexture, GL_TEXTURE0, GL_TEXTURE1
print ('Checking for extension support')
if not glMultiTexCoord2f:
print ('No OpenGL v1.3 built-in multi-texture support, checking for extension')
if not glMultiTexCoord2fARB:
print ('No GL_ARB_multitexture support, sorry, cannot run this demo!')
sys.exit(1)
else:
glMultiTexCoord2f = glMultiTexCoord2fARB
glActiveTexture = glActiveTextureARB
GL_TEXTURE0 = GL_TEXTURE0_ARB
GL_TEXTURE1 = GL_TEXTURE1_ARB
else:
print ('Using OpenGL v1.3 built-in multi-texture support')
try:
if not glInitMultitextureARB():
print ("Help! No GL_ARB_multitexture")
sys.exit(1)
except NameError:
# don't need to init a built-in (or an extension any more, for that matter)
pass
glActiveTexture(GL_TEXTURE0)
LoadTexture('Wall.bmp')
glEnable(GL_TEXTURE_2D)
glActiveTexture(GL_TEXTURE1)
LoadTexture('NeHe.bmp')
glEnable(GL_TEXTURE_2D)
glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_BLEND)
glClearColor(0.0, 0.0, 0.0, 0.0) # This Will Clear The Background Color To Black
glClearDepth(1.0) # Enables Clearing Of The Depth Buffer
glDepthFunc(GL_LESS) # The Type Of Depth Test To Do
glEnable(GL_DEPTH_TEST) # Enables Depth Testing
glShadeModel(GL_SMOOTH) # Enables Smooth Color Shading
glMatrixMode(GL_PROJECTION)
glLoadIdentity() # Reset The Projection Matrix
# Calculate The Aspect Ratio Of The Window
gluPerspective(45.0, float(Width)/float(Height), 0.1, 100.0)
glMatrixMode(GL_MODELVIEW)
# The function called when our window is resized (which shouldn't happen if you enable fullscreen, below)
def ReSizeGLScene(Width, Height):
if Height == 0: # Prevent A Divide By Zero If The Window Is Too Small
Height = 1
glViewport(0, 0, Width, Height) # Reset The Current Viewport And Perspective Transformation
glMatrixMode(GL_PROJECTION)
glLoadIdentity()
gluPerspective(45.0, float(Width)/float(Height), 0.1, 100.0)
glMatrixMode(GL_MODELVIEW)
deg_rad = math.pi/180.0
def DrawGLScene():
global rot, texture
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT) # Clear The Screen And The Depth Buffer
glLoadIdentity() # Reset The View
glTranslatef(0.0,0.0,-5.0) # Move Into The Screen
glRotatef(rot,1.0,0.0,0.0) # Rotate The Cube On It's X Axis
glRotatef(rot,0.0,1.0,0.0) # Rotate The Cube On It's Y Axis
glRotatef(rot,0.0,0.0,1.0) # Rotate The Cube On It's Z Axis
p = math.cos(rot*deg_rad)**2
glTexEnvfv(GL_TEXTURE_ENV, GL_TEXTURE_ENV_COLOR, (p, p, p, 1))
glBegin(GL_QUADS)
# Front Face (note that the texture's corners have to match the quad's corners)
glMultiTexCoord2f(GL_TEXTURE0, 0.0, 0.0); glMultiTexCoord2f(GL_TEXTURE1, 0.0, 0.0); glVertex3f(-1.0, -1.0, 1.0) # Bottom Left Of The Texture and Quad
glMultiTexCoord2f(GL_TEXTURE0, 1.0, 0.0); glMultiTexCoord2f(GL_TEXTURE1, 1.0, 0.0); glVertex3f( 1.0, -1.0, 1.0) # Bottom Right Of The Texture and Quad
glMultiTexCoord2f(GL_TEXTURE0, 1.0, 1.0); glMultiTexCoord2f(GL_TEXTURE1, 1.0, 1.0); glVertex3f( 1.0, 1.0, 1.0) # Top Right Of The Texture and Quad
glMultiTexCoord2f(GL_TEXTURE0, 0.0, 1.0); glMultiTexCoord2f(GL_TEXTURE1, 0.0, 1.0); glVertex3f(-1.0, 1.0, 1.0) # Top Left Of The Texture and Quad
# Back Face
glMultiTexCoord2f(GL_TEXTURE0, 1.0, 0.0); glMultiTexCoord2f(GL_TEXTURE1, 1.0, 0.0); glVertex3f(-1.0, -1.0, -1.0) # Bottom Right Of The Texture and Quad
glMultiTexCoord2f(GL_TEXTURE0, 1.0, 1.0); glMultiTexCoord2f(GL_TEXTURE1, 1.0, 1.0); glVertex3f(-1.0, 1.0, -1.0) # Top Right Of The Texture and Quad
glMultiTexCoord2f(GL_TEXTURE0, 0.0, 1.0); glMultiTexCoord2f(GL_TEXTURE1, 0.0, 1.0); glVertex3f( 1.0, 1.0, -1.0) # Top Left Of The Texture and Quad
glMultiTexCoord2f(GL_TEXTURE0, 0.0, 0.0); glMultiTexCoord2f(GL_TEXTURE1, 0.0, 0.0); glVertex3f( 1.0, -1.0, -1.0) # Bottom Left Of The Texture and Quad
# Top Face
glMultiTexCoord2f(GL_TEXTURE0, 0.0, 1.0); glMultiTexCoord2f(GL_TEXTURE1, 0.0, 1.0); glVertex3f(-1.0, 1.0, -1.0) # Top Left Of The Texture and Quad
glMultiTexCoord2f(GL_TEXTURE0, 0.0, 0.0); glMultiTexCoord2f(GL_TEXTURE1, 0.0, 0.0); glVertex3f(-1.0, 1.0, 1.0) # Bottom Left Of The Texture and Quad
glMultiTexCoord2f(GL_TEXTURE0, 1.0, 0.0); glMultiTexCoord2f(GL_TEXTURE1, 1.0, 0.0); glVertex3f( 1.0, 1.0, 1.0) # Bottom Right Of The Texture and Quad
glMultiTexCoord2f(GL_TEXTURE0, 1.0, 1.0); glMultiTexCoord2f(GL_TEXTURE1, 1.0, 1.0); glVertex3f( 1.0, 1.0, -1.0) # Top Right Of The Texture and Quad
# Bottom Face
glMultiTexCoord2f(GL_TEXTURE0, 1.0, 1.0); glMultiTexCoord2f(GL_TEXTURE1, 1.0, 1.0); glVertex3f(-1.0, -1.0, -1.0) # Top Right Of The Texture and Quad
glMultiTexCoord2f(GL_TEXTURE0, 0.0, 1.0); glMultiTexCoord2f(GL_TEXTURE1, 0.0, 1.0); glVertex3f( 1.0, -1.0, -1.0) # Top Left Of The Texture and Quad
glMultiTexCoord2f(GL_TEXTURE0, 0.0, 0.0); glMultiTexCoord2f(GL_TEXTURE1, 0.0, 0.0); glVertex3f( 1.0, -1.0, 1.0) # Bottom Left Of The Texture and Quad
glMultiTexCoord2f(GL_TEXTURE0, 1.0, 0.0); glMultiTexCoord2f(GL_TEXTURE1, 1.0, 0.0); glVertex3f(-1.0, -1.0, 1.0) # Bottom Right Of The Texture and Quad
# Right face
glMultiTexCoord2f(GL_TEXTURE0, 1.0, 0.0); glMultiTexCoord2f(GL_TEXTURE1, 1.0, 0.0); glVertex3f( 1.0, -1.0, -1.0) # Bottom Right Of The Texture and Quad
glMultiTexCoord2f(GL_TEXTURE0, 1.0, 1.0); glMultiTexCoord2f(GL_TEXTURE1, 1.0, 1.0); glVertex3f( 1.0, 1.0, -1.0) # Top Right Of The Texture and Quad
glMultiTexCoord2f(GL_TEXTURE0, 0.0, 1.0); glMultiTexCoord2f(GL_TEXTURE1, 0.0, 1.0); glVertex3f( 1.0, 1.0, 1.0) # Top Left Of The Texture and Quad
glMultiTexCoord2f(GL_TEXTURE0, 0.0, 0.0); glMultiTexCoord2f(GL_TEXTURE1, 0.0, 0.0); glVertex3f( 1.0, -1.0, 1.0) # Bottom Left Of The Texture and Quad
# Left Face
glMultiTexCoord2f(GL_TEXTURE0, 0.0, 0.0); glMultiTexCoord2f(GL_TEXTURE1, 0.0, 0.0); glVertex3f(-1.0, -1.0, -1.0) # Bottom Left Of The Texture and Quad
glMultiTexCoord2f(GL_TEXTURE0, 1.0, 0.0); glMultiTexCoord2f(GL_TEXTURE1, 1.0, 0.0); glVertex3f(-1.0, -1.0, 1.0) # Bottom Right Of The Texture and Quad
glMultiTexCoord2f(GL_TEXTURE0, 1.0, 1.0); glMultiTexCoord2f(GL_TEXTURE1, 1.0, 1.0); glVertex3f(-1.0, 1.0, 1.0) # Top Right Of The Texture and Quad
glMultiTexCoord2f(GL_TEXTURE0, 0.0, 1.0); glMultiTexCoord2f(GL_TEXTURE1, 0.0, 1.0); glVertex3f(-1.0, 1.0, -1.0) # Top Left Of The Texture and Quad
glEnd();
rot = (rot + 0.01) % 360
glutSwapBuffers()
def keyPressed(*args):
if args[0] == ESCAPE:
sys.exit()
def main():
global window
glutInit(sys.argv)
glutInitDisplayMode(GLUT_RGBA | GLUT_DOUBLE | GLUT_DEPTH)
glutInitWindowSize(640, 480)
glutInitWindowPosition(0, 0)
window = glutCreateWindow("Jeff Molofee's GL Code Tutorial ... NeHe '99".encode("cp932"))
glutDisplayFunc(DrawGLScene)
glutIdleFunc(DrawGLScene)
glutReshapeFunc(ReSizeGLScene)
glutKeyboardFunc(keyPressed)
InitGL(640, 480)
glutMainLoop()
print ("Hit ESC key to quit.")
main()実行結果
