Programming Forums > Application Development > C

funkymp · Jan 16th, 2006, 2:00 PM

hey all

ive got my quadtree thing workin (somehow without using pointers properly go figure) hehe. anyways, what im trying to do is this - when it finds a region that say has pixels within it that are the same colour, or it reaches the bottom of the tree and quads. i want to output it straight to a file.

the problem with this is - that when i do this, it sticks the RGB values in the order that they have been checked (i know why it does this, it makes sense)

is there anyway of outputting them directly to a file where they should be? instead of just one after another? or am thinking in mad mans terms (prolly the later)

below is the code i am using, FILE *q is the pointer to the output file

(Toggle Plain Text)

void createLeafNode(int StartXAxis,int StartYAxis,int WidthOfQuadrant, int HeightOfQuadrant, quadtreeNode *newNode,quadtreeNode *ptr_root, Pixel Image[], int width, int height,FILE *fp,FILE *q)
{
      int x = StartXAxis;//+WidthOfQuadrant)-1;
      int y = StartYAxis;//+HeightOfQuadrant)-1;
      newNode = new struct quadtreeNode;
      newNode->R = Image[x+(y*width)].R;
      newNode->G = Image[x+(y*width)].G;
      newNode->B = Image[x+(y*width)].B;
      newNode->StartWidth = StartXAxis;
      newNode->StartHeight = StartYAxis;
      newNode->WidthOfRegion = WidthOfQuadrant;
      newNode->HeightOfRegion = HeightOfQuadrant;
      //create neaf node test
     // printf("R: %d : G %d : B %d Coords X:%d,Y:%d Width of quadrant %d Height of quadrant %d\n",Image[x+(y*width)].R, Image[x+(y*width)].G, Image[x+(y*width)].B,x,y,WidthOfQuadrant,HeightOfQuadrant);    
      outputToFile(StartXAxis,StartYAxis,WidthOfQuadrant,HeightOfQuadrant,newNode,ptr_root,Image,width,height,fp,q);
      
}
void outputToFile(int StartXAxis, int StartYAxis, int WidthOfQuadrant, int HeightOfQuadrant, quadtreeNode *newNode, quadtreeNode *ptr_root,  Pixel Image[], int width,int height,FILE *fp,FILE *q)
{
    int x = StartXAxis;
    int y = StartYAxis;
    for (int a=StartXAxis;a<StartXAxis+WidthOfQuadrant;a++)
    {
       for (int b=StartYAxis;b<StartYAxis+HeightOfQuadrant;b++)
       {
       fprintf(q, "%c", newNode->R);
       fprintf(q, "%c", newNode->G);
       fprintf(q, "%c", newNode->R);
       //output to file test
      // printf(" R: %d :  G %d :  B %d \n",Image[x+(y*width)].R, Image[x+(y*width)].G, Image[x+(y*width)].B);    
       }
    }
}

any help would be appreciated, its driving me up the wall lol

rob

Jan 16th, 2006, 2:00 PM	#1
funkymp Newbie Join Date: Jan 2006 Posts: 7 Rep Power: 0	outputting to a file to create a image hey all ive got my quadtree thing workin (somehow without using pointers properly go figure) hehe. anyways, what im trying to do is this - when it finds a region that say has pixels within it that are the same colour, or it reaches the bottom of the tree and quads. i want to output it straight to a file. the problem with this is - that when i do this, it sticks the RGB values in the order that they have been checked (i know why it does this, it makes sense) is there anyway of outputting them directly to a file where they should be? instead of just one after another? or am thinking in mad mans terms (prolly the later) below is the code i am using, FILE q is the pointer to the output file (Toggle Plain Text) void createLeafNode(int StartXAxis,int StartYAxis,int WidthOfQuadrant, int HeightOfQuadrant, quadtreeNode newNode,quadtreeNode ptr_root, Pixel Image[], int width, int height,FILE fp,FILE q) { int x = StartXAxis;//+WidthOfQuadrant)-1; int y = StartYAxis;//+HeightOfQuadrant)-1; newNode = new struct quadtreeNode; newNode->R = Image[x+(ywidth)].R; newNode->G = Image[x+(ywidth)].G; newNode->B = Image[x+(ywidth)].B; newNode->StartWidth = StartXAxis; newNode->StartHeight = StartYAxis; newNode->WidthOfRegion = WidthOfQuadrant; newNode->HeightOfRegion = HeightOfQuadrant; //create neaf node test // printf("R: %d : G %d : B %d Coords X:%d,Y:%d Width of quadrant %d Height of quadrant %d\n",Image[x+(ywidth)].R, Image[x+(ywidth)].G, Image[x+(ywidth)].B,x,y,WidthOfQuadrant,HeightOfQuadrant); outputToFile(StartXAxis,StartYAxis,WidthOfQuadrant,HeightOfQuadrant,newNode,ptr_root,Image,width,height,fp,q); } void outputToFile(int StartXAxis, int StartYAxis, int WidthOfQuadrant, int HeightOfQuadrant, quadtreeNode newNode, quadtreeNode ptr_root, Pixel Image[], int width,int height,FILE fp,FILE q) { int x = StartXAxis; int y = StartYAxis; for (int a=StartXAxis;a<StartXAxis+WidthOfQuadrant;a++) { for (int b=StartYAxis;b<StartYAxis+HeightOfQuadrant;b++) { fprintf(q, "%c", newNode->R); fprintf(q, "%c", newNode->G); fprintf(q, "%c", newNode->R); //output to file test // printf(" R: %d : G %d : B %d \n",Image[x+(ywidth)].R, Image[x+(ywidth)].G, Image[x+(ywidth)].B); } } } void createLeafNode(int StartXAxis,int StartYAxis,int WidthOfQuadrant, int HeightOfQuadrant, quadtreeNode newNode,quadtreeNode ptr_root, Pixel Image[], int width, int height,FILE fp,FILE q) { int x = StartXAxis;//+WidthOfQuadrant)-1; int y = StartYAxis;//+HeightOfQuadrant)-1; newNode = new struct quadtreeNode; newNode->R = Image[x+(ywidth)].R; newNode->G = Image[x+(ywidth)].G; newNode->B = Image[x+(ywidth)].B; newNode->StartWidth = StartXAxis; newNode->StartHeight = StartYAxis; newNode->WidthOfRegion = WidthOfQuadrant; newNode->HeightOfRegion = HeightOfQuadrant; //create neaf node test // printf("R: %d : G %d : B %d Coords X:%d,Y:%d Width of quadrant %d Height of quadrant %d\n",Image[x+(ywidth)].R, Image[x+(ywidth)].G, Image[x+(ywidth)].B,x,y,WidthOfQuadrant,HeightOfQuadrant); outputToFile(StartXAxis,StartYAxis,WidthOfQuadrant,HeightOfQuadrant,newNode,ptr_root,Image,width,height,fp,q); } void outputToFile(int StartXAxis, int StartYAxis, int WidthOfQuadrant, int HeightOfQuadrant, quadtreeNode newNode, quadtreeNode ptr_root, Pixel Image[], int width,int height,FILE fp,FILE q) { int x = StartXAxis; int y = StartYAxis; for (int a=StartXAxis;a<StartXAxis+WidthOfQuadrant;a++) { for (int b=StartYAxis;b<StartYAxis+HeightOfQuadrant;b++) { fprintf(q, "%c", newNode->R); fprintf(q, "%c", newNode->G); fprintf(q, "%c", newNode->R); //output to file test // printf(" R: %d : G %d : B %d \n",Image[x+(ywidth)].R, Image[x+(ywidth)].G, Image[x+(y*width)].B); } } } any help would be appreciated, its driving me up the wall lol rob

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Programming Forums > Application Development > C

outputting to a file to create a image