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More Rounding Problems

Started by ToastFlambe Feb 21, 2005 at 5:38 PM 3 replies 750+ views

Original Post

Feb 21, 2005 at 5:38 PM

In my program I have a line like this: XIntersect = floor(b1 / (RaySlope - WallSlope)); where "WallSlope", "RaySlope", and "b1" are all floats and XIntersect is an int. But even though I'm rounding it down with the floor() function and I've included math.h, my compiler(Dev C++ 4) gives me warning: assignment to int' from float' It still lets my program compile but my program doesn't work (I can't tell if thats because of this or because of a mistake in my code, though). Does anyone know what is causing this?

Drew_Benton

Feb 21, 2005 at 5:47 PM

Quote:
Original post by Alt F4
warning: assignment to int' from float'

It still lets my program compile but my program doesn't work (I can't tell if thats because of this or because of a mistake in my code, though). Does anyone know what is causing this?

floor() returns a double/float. I doubt that is what is causing your program not to work. It may have to do with other code you are using.

- Drew

Evil Steve

Feb 21, 2005 at 6:05 PM

That's just a warning. You can get rid of it by changing the code to:
XIntersect = (int)floor(b1 / (RaySlope - WallSlope));
As Drew said, that's not going to cause any real problems, the problem must be elsewhere.
What do you mean that the program "doesn't work"?

ToastFlambe

Feb 21, 2005 at 9:16 PM

I'm programming a raycaster and, currently, I haven't been able to get anything to show on the screen. I just figured out that the loop used to actually "cast" the rays loops infinitely for some reason. Its kind of funny, because the text file my error checking code (i.e printf())made was 22mb of the words "looping through the rays"

Zahlman

Feb 22, 2005 at 12:23 AM

We're not psychic; show source if you need/want help debugging the loop. :s

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