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Index › Programming Questions & Help › Syntax Questions › accumulated rotation value
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accumulated rotation value (Read 724 times)
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accumulated rotation value
Aug 12th, 2007, 5:50pm  

Hi,

Can anyone tell me how to make rotations not accumulate?

for example:


void draw()
{
line_one();
line_two();
line_three();
}

void line_one()
{
rotateX(a value);
line(x1, y1, z1, x2, y2, z2);
}

 void line_two()
 {
  rotateX(a value);
  line(x1, y1, z1, x2, y2, z2);
 }

   void line_three()
   {
    rotateX(a value);
    line(x1, y1, z1, x2, y2, z2);
   }

When I do this, line two rotates at 2 x (a value), and line three rotates 3 x (a value), and so forth...

I also used pushMatrix, translate and popMatrix functions in each 'void line()', but the result is the same.

What do you think I am missing?

Thanks,

Emre.
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V
Re: accumulated rotation value
Reply #1 - Aug 12th, 2007, 10:07pm  
Edit!

pushMatrix() and popMatrix() is the way to go..
maybe you used them wrong


example:

void line1()
{
pushMatrix();
rotate();
render();
popMatrix();
}

void line2()
{
pushMatrix();
rotate();
render();
popMatrix();
}
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Victor Martins | www.pixelnerve.com/v
WWW  
error
Re: accumulated rotation value
Reply #2 - Aug 16th, 2007, 11:44pm  

thanks a lot !
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alphachapmtl
Re: accumulated rotation value
Reply #3 - Aug 27th, 2007, 12:53pm  
or just do

void line_one()
{
rotateX(a value);
line(x1, y1, z1, x2, y2, z2);
rotateX(-a value);
}
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