Question: using the OpenGL API and the C programming language the program changes the color of triangle. The program paint the triangle using red if 'r'

using the OpenGL API and the C programming language

the program changes the color of triangle. The program paint the triangle using red if 'r' is pressed, green if 'g' is pressed, blue if 'b' is pressed, and if any other key program terminates. Modify the parameters in the function call to gluOrtho2D(); until you have a good understanding of what each parameter means.

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