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Full Discussion: If loop is not working
Top Forums UNIX for Advanced & Expert Users If loop is not working Post 302223973 by era on Tuesday 12th of August 2008 02:29:29 AM
Old 08-12-2008
Piping into the if is also a problem; by definition, the exit status of a pipeline is the exit status of the last command of the pipeline, so false; false | if [ $? == 1 ] is not well-defined (and at least in my Bash, doesn't do anything; the error code is always zero at that point).
 

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GLACTIVESHADERPROGRA(3G)					   OpenGL Manual					  GLACTIVESHADERPROGRA(3G)

NAME
glActiveShaderProgram - set the active program object for a program pipeline object C SPECIFICATION
void glActiveShaderProgram(GLuint pipeline, GLuint program); PARAMETERS
pipeline Specifies the program pipeline object to set the active program object for. program Specifies the program object to set as the active program pipeline object pipeline. DESCRIPTION
glActiveShaderProgram sets the linked program named by program to be the active program for the program pipeline object pipeline. The active program in the active program pipeline object is the target of calls to glUniform() when no program has been made current through a call to glUseProgram(). ERRORS
GL_INVALID_OPERATION is generated if pipeline is not a name previously returned from a call to glGenProgramPipelines() or if such a name has been deleted by a call to glDeleteProgramPipelines(). GL_INVALID_OPERATION is generated if program refers to a program object that has not been successfully linked. SEE ALSO
glGenProgramPipelines(), glDeleteProgramPipelines(), glIsProgramPipeline(), glUseProgram(), glUniform() COPYRIGHT
Copyright (C) 2010 Khronos Group. This material may be distributed subject to the terms and conditions set forth in the Open Publication License, v 1.0, 8 June 1999. http://opencontent.org/openpub/. AUTHORS
opengl.org opengl.org 06/10/2014 GLACTIVESHADERPROGRA(3G)
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