Help with a runtime error
January 22, 2003 02:53 AM
In my camera class I have 4 vectors: pos, view, up, and right. In my camera''s movement function I can create and use local vectors all I want, but as soon as I try to access any of the 4 vectors owned by the class, my program crashes when I try to rum it. When I debug it I get a warning that reads:
Access violation (Segmentation fault) raised in your program.
and the debugger points to the line of code referring to the vector. I''m using Dev-C++.
I''m fairly new to this, so I''m not real sure what the error is telling me, and even less sure how to solve it. Can somebody help me?
Thanks.
yckx
164
January 22, 2003 02:59 AM
Hello,
A guess is: uninitialized variable!
Regards,
Deficite
A guess is: uninitialized variable!
Regards,
Deficite
Regards,
Deficte
Deficte
712
January 22, 2003 03:22 AM
Sounds like your code is trying to use uninitialised memory as though it were a camera instance. Can you show us the code where you create and use the camera?
January 23, 2003 09:23 AM
That seems to be what it was, I managed to get it working.
Thsnks.
yckx
Thsnks.
yckx
January 25, 2003 11:14 AM
Ok, I fixed this problem in the camera with a hack, but I''ve now run into it again. Apparently I don''t know what I''m doing 
Here''s the code:
This code compiles, but I get the same Access Violation error I was getting before. I set the color components = 0 in the mazeSide constructor in an attempt to init the variable, but apparently that isn''t doing it?
How do I fix this properly?
Thanks
yckx
Here''s the code: struct Color3{ float r, g, b;};struct MazeSide{ // other stuff Color3 color; MazeSide();};MazeSide::MazeSide(){ color.r = 0; color.g = 0; color.b = 0;}Maze::Maze(){ renderCube = true; for(int i = 0; i < 6; ++i) { mazeArray[i] = new MazeSide; mazeArray[1]->color.r = 0.2; //<- problem! mazeArray[i]->color.g = 0.2; mazeArray[i]->color.b = 1.0; }} This code compiles, but I get the same Access Violation error I was getting before. I set the color components = 0 in the mazeSide constructor in an attempt to init the variable, but apparently that isn''t doing it?
How do I fix this properly?
Thanks
yckx
122
January 25, 2003 11:45 AM
There's no need to initialize r, g and b to zero as long as you set them to something before you use them.
A more likely problem is that your loop writes outside the bounds of mazeArray.
EDIT: Or perhaps mazeArray is an uninitialized or previously deleted pointer to some space on the heap?
[edited by - micepick on January 25, 2003 12:46:32 PM]
A more likely problem is that your loop writes outside the bounds of mazeArray.
EDIT: Or perhaps mazeArray is an uninitialized or previously deleted pointer to some space on the heap?
[edited by - micepick on January 25, 2003 12:46:32 PM]
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