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openGL problem with floats

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Started by hannibar October 04, 2004 03:17 PM

1 comment, last by hannibar 19 years, 6 months ago

hannibar

122

Author

October 04, 2004 03:17 PM

I have a problem with openGL and the use of floats. Take a look at this piece of code for example

glColor3f(0.900, 0.550, 0.300);

MSVC6 gives these warnings : C:\Documents and Settings\Hans Packet\Mijn documenten\Mijn Spullen\Programmeren\Gui_Test\LijnTest\draw.cpp(11) : warning C4305: 'argument' : truncation from 'const double' to 'float' C:\Documents and Settings\Hans Packet\Mijn documenten\Mijn Spullen\Programmeren\Gui_Test\LijnTest\draw.cpp(11) : warning C4305: 'argument' : truncation from 'const double' to 'float' The numbers I use are floats. I don't know what causes the warnings. Although I know these are just warnings, and that I can just ignore them, I like a clean build without warnings. Thanks in advance

RabidCow

181

October 04, 2004 03:21 PM

That's because you're passing double arguments to a function that expects floats. It should be one of these:

glColor3d(0.900, 0.550, 0.300); // pass doubles to double function
glColor3f(0.900f, 0.550f, 0.300f); // pass floats to float function

-RC

-RCmy website

hannibar

122

Author

October 04, 2004 03:56 PM

thanks for the helpful answer.