aapo/aaplot

Automatically exported from code.google.com/p/aaplot

aaplot's Issues

Test issue - don't understand

What steps will reproduce the problem?
1. Download program

What is the expected output? What do you see instead?
Black screen

What version of the product are you using? On what operating system?
I don't know

Please provide any additional information below.
This is just a test issue to test the 'issue tool', not a real issue

Original issue reported on code.google.com by [email protected] on 13 Jun 2008 at 7:59

discuss: generating (randomly) RGB-colors

This is discussion about generating (randomly) RGB-colors, so they are not
all approx [0.5 , 0.5 , 0.5]?

First version:
{{{
void getColors(float *red, float *green, float *blue){
int r=rand ();
int g=rand ();
int b=rand ();

*red=(r+0.0)/RAND_MAX;
*green=(g+0.0)/RAND_MAX;
*blue=(b+0.0)/RAND_MAX;
}
}}}


Second version: (little test-tweaking)
{{{
void getColors(float *red, float *green, float *blue){
int r=rand ();
int g=rand ();
int b=rand ();

*red=(r+0.0)/RAND_MAX;
*green=(g+0.0)/RAND_MAX;
*blue = *red+*green;
if (*blue >1.0)
   *blue=*blue-1.0;
}
}}}


Third version: (this is almost good)
{{{
/*
Because random number generator is NOT initialized, this gives same numbers
each time when program runs.
I try generate three numbers [0,1], that all is not approx 0,5.
First I randomize red and green, and if they are 'too middle' I fix blues
value.

The point is:
 red   = random value [0,1]
 green = random value [0,1]

There are 4 'slots' which red and green might be.
  0    low     mid=0.5     hig    1
R |     |         |         |     |
G |     |         |         |     |


case 1:
  0    low     mid=0.5     hig    1
R |     |    X    |         |     |
G |     |    X    |         |     |
B |     |         |         |  X  |

case 2:
  0    low     mid=0.5     hig    1
R |     |         |    X    |     |
G |     |         |    X    |     |
B |  X  |         |         |     |

case 3:
  0    low     mid=0.5     hig    1
R |     |         |    X    |     |
G |     |    X    |         |     |
B |  X  |         |         |  X  |

case 4:
  0    low     mid=0.5     hig    1
R |     |    X    |         |     |
G |     |         |    X    |     |
B |  X  |         |         |  X  |

*/
void getColors(float *red, float *green, float *blue){
int r=rand ();
*red=(r+0.0)/RAND_MAX;
int g=rand ();
*green=(g+0.0)/RAND_MAX;

float low = 0.2;
float mid = 0.5;
float hig = 1-low;
if (*red>low && *red<mid && *green>low && *green<mid)
   {
   *blue=(rand()+0.0)/RAND_MAX / (1/low) + hig;
   }
else if (*red>mid && *red<hig && *green>mid && *green<hig)
   {
   *blue=(rand()+0.0)/RAND_MAX / (1/low);
   }
else if (*red>low && *red<hig && *green>low && *green<hig)
   {
   *blue=(rand()+0.0)/RAND_MAX / 2.0;
   int b=rand (); /*toss a coin */
   if (b<RAND_MAX/2)
      *blue=*blue*2 / (1/low);
   else 
      *blue=*blue*2 / (1/low) + hig;
   }
else
   {
   int b=rand ();
   *blue=(b+0.0)/RAND_MAX;
   }

//printf("%lf,%lf,%lf\n",*red,*green,*blue);
}
}}}

Original issue reported on code.google.com by aapo.rantalainen on 28 Jun 2008 at 11:47

Crash when opening the plot window

What steps will reproduce the problem?
1. download the bzr branch: bzr branch http://lauta.dyndns.org/aaplot
2. make all
3. run an example: ./example2

What is the expected output? What do you see instead?
I thought I would see the graph but as soon as the window opens, it also
closes and I get error messages in the terminal.

What version of the product are you using? On what operating system?
bzr, revision 22 on Kubuntu Hardy.

Please provide any additional information below.
see http://pastebin.com/m4d0b123b for full details.

Display adaptor: 01:00.0 VGA compatible controller: ATI Technologies Inc
RV280 [Radeon 9200 SE] (rev 01)

3D acceleration not active, using vesa drivers.

Original issue reported on code.google.com by [email protected] on 17 Jun 2008 at 10:13

discuss: setting lights with GL

Discussing about:
How to set Lights, so surfaces looks clear?

Code looks like this, but I'm not pleased with it. Do I need more lightsources?

GLfloat pos[4] = {0., -5., 0., 1.};
GLfloat white[4] = {1., 1., 1., 1.};
GLfloat black[4] = {0., 0., 0., 0.};

glEnable (GL_LIGHTING);
glEnable (GL_COLOR_MATERIAL);
glColorMaterial (GL_FRONT, GL_AMBIENT_AND_DIFFUSE);

glEnable (GL_LIGHT1);
glLightfv (GL_LIGHT1, GL_POSITION, pos);
glLightfv (GL_LIGHT1, GL_DIFFUSE, white);
glLightfv (GL_LIGHT1, GL_SPECULAR, black);

glMaterialfv (GL_FRONT, GL_SPECULAR, black);

Original issue reported on code.google.com by aapo.rantalainen on 28 Jun 2008 at 11:49