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strange problem with vector declaration

 
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Ghoti



Joined: 31 Dec 2005
Posts: 288
PostPosted: Tue Jul 03, 2007 6:47 pm    Post subject: strange problem with vector declaration Reply with quote
Hi folks,

i have this vector:

Code:
std::vector<ObjColFace*>      collisionFaces;   


and the pointer points to :

Code:
typedef struct {   ScePspFVector3   vertices[3];   } ObjColFace;


if i use the first line, my psp crashes with an address load / inst fetch error using psplink. when i comment it out it all works fine. I do not use the collisionFaces anyway yet in the program (all usage is commented out)

it gives not compiler errors, what am i doing wrong here ?
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My PSP games:

Boxy II: http://www.ghoti.nl/boxyii.php
Elementals: http://www.ghoti.nl/Elementals.php
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hlide



Joined: 10 Sep 2006
Posts: 750
PostPosted: Tue Jul 03, 2007 8:32 pm    Post subject: Reply with quote
*sigh* please don't forget to output the code which uses your std::vector. Nothing can be said here with that very few infos

My hint is that your std::vector has deleted or null pointers because of your blunders or something like.
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Ghoti



Joined: 31 Dec 2005
Posts: 288
PostPosted: Tue Jul 03, 2007 8:50 pm    Post subject: Reply with quote
*sigh* please read correct :p , i stated that I do not use the std::vector in my code at all, just putting in the std::vector makes my psp crash when rendering, but in my render sub it does not use the std::vector:
Code:
void Obj::Render(float x, float y, float z, float turn) {

      //char s[256];
      //sprintf(s, "Render location: %f, %f, %f and the TURN: %f", x, y, z, turn);
      //DebugTools::PrintText(s);

      matrix_identity((float*)&world);


      if (turn != 0) {
         matrix_identity((float*)&tmpworld);
         matrix_rotate((float*)&tmpworld,0,turn,0);
         matrix_multiply((float*)&world, (float*)&world, (float*)&tmpworld);
      }

      matrix_identity((float*)&tmpworld);
      matrix_translate((float*)&tmpworld,x,y,z);
      matrix_multiply((float*)&world, (float*)&tmpworld, (float*)&world);

      
      sceGuSetMatrix(GU_MODEL,&world);
      
      sceGuTexMode(GU_PSM_8888, 0 ,0 ,0);
      sceGuTexFunc(GU_TFX_REPLACE, GU_TCC_RGB);
      sceGuTexFilter(GU_LINEAR, GU_LINEAR);
      sceGuTexScale(1.0f, 1.0f);
      sceGuTexOffset(0.0f, 0.0f);
      

      int i;


      for (i=0;i<iNumberOfParts;i++)
      {
         sceGuTexImage(0, ObjMeshParts[i].texture->textureWidth, ObjMeshParts[i].texture->textureHeight, ObjMeshParts[i].texture->textureWidth, (void*)ObjMeshParts[i].texture->data);
         sceGuDrawArray(GU_TRIANGLES,GU_TEXTURE_32BITF|GU_COLOR_8888|GU_VERTEX_32BITF|GU_TRANSFORM_3D,ObjMeshParts[i].iFaces*3,0,ObjMeshParts[i].Vertices);
      }

      return;
   };


the std::vector is used to store collisionfaces but is not used at the moment so the only thing i did was adding those two rows in a working application and then it stopped working :s I will look into it more but maybe you have some advice how to find the real error in this or something.

P.S. the sigh and :p were meant as a joke :)[/quote]
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My PSP games:

Boxy II: http://www.ghoti.nl/boxyii.php
Elementals: http://www.ghoti.nl/Elementals.php
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ufoz



Joined: 10 Nov 2005
Posts: 86
Location: Tokyo
PostPosted: Tue Jul 03, 2007 10:45 pm    Post subject: Reply with quote
Your bug is probably elsewhere, and adding the extra variable makes it go away. Try tracking down where it crashes with psplink..?
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danzel



Joined: 04 Nov 2005
Posts: 182
PostPosted: Tue Jul 03, 2007 10:49 pm    Post subject: Reply with quote
Alignment of variables would be my guess.
Search the forum for "alignment", most of the results should be useful.

When you add the vector your variables are no longer aligned in memory as they need to be, so when you try use them with something that requires alignment (VFPU for example, which I assume those matrix functions use) it doesn't work.
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