[求助]为什么赋值不对？？(页 1) - C++论坛 - C++ Builder - 编程论坛

IsaacLee 发表于 2006-4-25 21:13

[求助]为什么赋值不对？？

pBitmap->Canvas->Pixels[x][y]= currentLayer; 我想把currentLayer的值赋给前面图象中的像素值，但是我通过跟踪发现它根本没有赋过去，为什么啊？？难道是类型不对吗？我的currentLayer是整型的！请问这是为什么啊？？谢谢！

IsaacLee 发表于 2006-4-26 10:43

请问各位怎么解决啊？？很急啊！！有哪位知道的？？麻烦解释一下！！谢谢啦！！

Knocker 发表于 2006-4-26 11:04

贴上代码

IsaacLee 发表于 2006-4-27 19:04

//---------------------------------------------------------------------------
#include <vcl.h> #pragma hdrstop #include <Graphics.hpp>
#include "CenterLine.h" //--------------------------------------------------------------------------- #pragma package(smart_init) #pragma resource "*.dfm" struct indexRec { int row; int fromCol; int toCol; };
TForm1 *Form1; indexRec indexM[30000]; long int indexP = 0; int layerInc = 20; Graphics::TBitmap *pBitmap = new Graphics::TBitmap();
//--------------------------------------------------------------------------- __fastcall TForm1::TForm1(TComponent* Owner) : TForm(Owner) { }
//--------------------------------------------------------------------------- bool appendPixel2Matrix(int y, int x) { indexM[indexP].toCol = x; return true; }
 //--------------------------------------------------------------------------- bool InsertNewSeg2Matrix(int y, int x) { indexM[indexP].row = y; indexM[indexP].fromCol = x; indexM[indexP].toCol = x; return true; }
 //--------------------------------------------------------------------------- bool isBoard(int x,int y, int currentLayer) { int xx,yy; uchar pixelValue; for(yy=y-1; yy<=y+1; yy++) { if(yy<0 | yy > pBitmap->Height) continue; for(xx=x-1; xx<=x+1; xx++) { if(xx<0 | xx > pBitmap->Width) continue; if(xx==x & yy==y) continue; pixelValue = (uchar)pBitmap->Canvas->Pixels[xx][yy]; if(pixelValue==255 | pixelValue== (uchar)(currentLayer-layerInc)) return true; } } return false; }
 //--------------------------------------------------------------------------- void __fastcall TForm1::Button1Click(TObject *Sender) { pBitmap->PixelFormat = pf8bit; int currentLayer = 0; bool segStart = false; uchar pixelValue; bool changed = true; int x,y,i;
indexP = 0; layerInc = 20;
pBitmap->LoadFromFile("D:\\工程\\中心线<a>\\1001.bmp</A>"); pBitmap->PixelFormat = pf8bit; // form index matrix for (y = 0; y < pBitmap->Height; y++) { segStart = false; for(x = 0; x < pBitmap->Width; x++) { pixelValue = (uchar)pBitmap->Canvas->Pixels[x][y]; if(pixelValue==0) { //black pixel if(segStart) {appendPixel2Matrix(y,x);continue; } else {InsertNewSeg2Matrix(y,x);segStart=true;continue;} } else { //white pixel if(segStart) { segStart = false; indexP++; if(indexP>=30000) { ShowMessage("indexP overflow!!"); return; } } } } }
// search board pixel by the index of matrix indexM
 changed = true; currentLayer = 10; while(changed) { changed = false; currentLayer += layerInc; for(i= 0; i<indexP; i++) { y = indexM[i].row; for(x=indexM[i].fromCol; x<=indexM[i].toCol;x++) { //dataPos = y*cvImage->widthStep; pixelValue = (uchar)pBitmap->Canvas->Pixels[x][y]; if(pixelValue!=0) continue; if(isBoard(x,y,currentLayer)) { pBitmap->Canvas->Pixels[x][y]= currentLayer; changed = true; } } } //Form1->Canvas->Draw(0,0,pBitmap); if(!changed) break; } Form1->Canvas->Draw(0,0,pBitmap); } //--------------------------------------------------------------------------- 以上是代码！帮我看看，谢谢啦！！

lxgaaa 发表于 2006-6-4 12:34

CBC的确不好弄啊调试都难 
等有耐心的人来帮忙了

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[求助]为什么赋值不对？？