Question

Solution:

strtod instead of atof solved it.
Thanks!

TODO: make this an answer for acceptance

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I’m loading a value from an XML file that tells how much the texture should be rotated.

It looks like this:

string rotv = ItemElem->FirstChild("Rotation")->FirstChild()->Value();
rotation = -(atof(rotv.c_str()))*57.2957795;

In my level editor the textures are rotated properly; pi equals 180 degrees and so on.
But in the engine; they are not, it seems like the decimals are ignored. So for example, a texture that should be rotated 3.14 radians is only rotated 3 radians and so on.
I’ve tried many different approaches to make sure the decimals are included, but I can’t get it to work.

I rotate the textures like this:

glBindTexture(GL_TEXTURE_2D, texture->GetImage());
glMatrixMode(GL_TEXTURE);

glLoadIdentity();
glTranslatef(0.5, 0.5, 0);
glRotatef(rotation, 0, 0, 1);
glTranslatef(-0.5, -0.5, 0);

glMatrixMode(GL_PROJECTION);

The value in the xml file uses a dot instead of coma and I convert it like this, I also store the decimals separately just for debugging.

 for (int x = 0; x < rotv.size(); x++)
     {
          if (afterComa)
          {
                  int temp = (int) rotv[x] - '0';
              if (temp <10 && temp >= 0)
              {
                  decimals[decimalPos] = temp;
                  decimalPos++;
              }
              else
              {
                  break;
              }

          }
         if (rotv[x] == '.')
         {
             rotv[x] = ',';
             afterComa = true;
          }
      }

float decimalValue = decimals[0]/10 + decimals[1]/100 + decimals[2]/1000 + decimals[3]/10000 + decimals[4]/100000 + decimals[5]/1000000;

The decimals are stored properly and I add them to the rotation value but it still doesn’t help.

Answer 1

You can use strtod instead of atof. It has better localization so you don’t have to change the “.” to “,”