use of pointers in lesson#6

dnagcat · 2003-03-18T09:50:48

I have some specific pointer questions in lesson 6 that I need some help with...These lines of code are new functions Jeff added to this lesson... AUX_RGBImageRec *LoadBMP(char *Filename) {...} I am assuming that LoadBMP is a function pointer that returns AUX_RGBImageRec...right? So why use a function pointer when this function is called like so... if(TextureImage[0]=LoadBMP("Data/NeHe.bmp"){...} by the way TextureImage[0] is also a pointer... AUX_RGBImageRec *TextureImage[1]; Im a little lost with all the pointers being thrown around! Maybe I answered my own question... LoadBMP("Data/NeHe.bmp") returns NULL or auxDIBImageLoad("Data/NeHe.bmp")...so if it passes then A pointer of AUX_RGBImageRec is NULL or is equal to auxDIBImageLoad(Filename)... No Im more confused now!

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Started by dnagcat March 17, 2003 04:10 PM

10 comments, last by dnagcat 21 years, 11 months ago

K-1

122

March 18, 2003 08:09 AM

In an attempt to either clear things up or just add more fuel to the confusion fire, I'll add my two cents.

The LoadBMP function returns the address to an AUX_RGBImageRec object. The way we store the address is through a pointer to a AUX_RGBImageRec object, hence the AUX_RGBImageRec *.

Call me crazy, but I didn't think returning a pointer could cause so much confusion...

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[edited by - K-1 on March 18, 2003 9:09:30 AM]

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dnagcat

Author

122

March 18, 2003 09:50 AM

Thanks everyone for your time and effort...
I really appreciate your explanations I now I think I can finally move forward...

LOL

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use of pointers in lesson#6

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