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Full Discussion: Incrementing Variable Names
Top Forums UNIX for Dummies Questions & Answers Incrementing Variable Names Post 302443647 by Scott on Monday 9th of August 2010 05:30:45 PM
Old 08-09-2010
Code:
#Define multiple arrays, whose names only differ by a number:
ARRAY_1=(1 2 3)
ARRAY_2=(4 5 6)
ARRAY_3=(7 8 9)

#Define ARRAY_AMOUNT, the number of arrays. In this case ARRAY_AMOUNT is 3:
ARRAY_AMOUNT=3

#Go through a FOR loop a number of times equal to ARRAY_AMOUNT, with the variable "A" being the place setter:
for (( A=1; A<=$ARRAY_AMOUNT; A++ )); do

#Set GOOD_ARRAY equal to 'ARRAY_'${A}; ie when A=1 then GOOD_ARRAY will equal ARRAY_1 which is an array containing the values 1 2 3. THIS IS WHAT I DON'T KNOW HOW TO DO:

#DOES WORK:
GOOD_ARRAY=($(eval echo \${ARRAY_$A[@]}))

echo ${GOOD_ARRAY[@]}

done

Hi.

The bits I changed are in red.

Output:
Code:
1 2 3
4 5 6
7 8 9

 

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LEARN ABOUT CENTOS

glgenvertexarrays

GLGENVERTEXARRAYS(3G)						   OpenGL Manual					     GLGENVERTEXARRAYS(3G)

NAME

       glGenVertexArrays - generate vertex array object names

C SPECIFICATION

       void glGenVertexArrays(GLsizei n, GLuint *arrays);

PARAMETERS

       n
	   Specifies the number of vertex array object names to generate.

       arrays
	   Specifies an array in which the generated vertex array object names are stored.

DESCRIPTION

       glGenVertexArrays returns n vertex array object names in arrays. There is no guarantee that the names form a contiguous set of integers;
       however, it is guaranteed that none of the returned names was in use immediately before the call to glGenVertexArrays.

       Vertex array object names returned by a call to glGenVertexArrays are not returned by subsequent calls, unless they are first deleted with
       glDeleteVertexArrays().

       The names returned in arrays are marked as used, for the purposes of glGenVertexArrays only, but they acquire state and type only when they
       are first bound.

ERRORS

       GL_INVALID_VALUE is generated if n is negative.

SEE ALSO

       glBindVertexArray(), glDeleteVertexArrays()

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						     GLGENVERTEXARRAYS(3G)
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