// global settings
glTexEnvi(GL_TEXTURE_ENV,GL_TEXTURE_ENV_MODE,GL_MODULATE);
glEnable(GL_TEXTURE_3D);
// bind specific texture
glBindTexture(GL_TEXTURE_3D,texid);
// transfrom texture into world coordinates
glMatrixMode(GL_TEXTURE);
glLoadIdentity();
glTranslated(0.5,0.5,0.5);
glMatrixMode(GL_MODELVIEW);
// render textured geometry
glColor3f(1,1,1);
glBegin(GL_QUADS);
glTexCoord3f(x_0,y_0,z_0);
glVertex3d(x_0,y_0,z_0);
glTexCoord3f(x_1,y_1,z_1);
glVertex3d(x_1,y_1,z_1);
glTexCoord3f(x_2,y_2,z_2);
glVertex3d(x_2,y_2,z_2);
glTexCoord3f(x_3,y_3,z_3);
glVertex3d(x_3,y_3,z_3);
glEnd();
// unbind texture
glBindTexture(GL_TEXTURE_3D,0);
glDisable(GL_TEXTURE_3D);