我正在尝试构建一个四叉树，并且遇到了一些困难。它旨在读取二进制图像（在其他地方处理）并执行各种操作。但是，当然，首先必须构造四叉树。为了方便操作，我希望继续细分树，直到所有像素都是一种纯色（黑色或白色）。
我有以下函数，它只是调用一个辅助函数来处理构建树的冗长递归过程。
void Quadtree::constructQuadtree(Image* mImage){
if (mImage->imgPixels == 0) {
return;
}
root = new QTNode();
this->root = buildQTRecur(mImage, 0, 0, mImage->rows);
}
这是处理大部分树构建的辅助函数：
QTNode* Quadtree::buildQTRecur(Image* mImage, int startRow, int startCol, int subImageDim) {
if (this->root == NULL) {
return this->root;
}
if (subImageDim >= 1) {
int initialValue = 0;
bool uniform = false;
// Check to see if subsquare is uniformly black or white (or grey)
for (int i = startRow; i < startRow + subImageDim; i++)
{
for (int j = startCol; j < startCol + subImageDim; j++)
{
if ((i == startRow) && (j == startCol))
initialValue = mImage->imgPixels[i*mImage->rows+j];
else {
if (mImage->imgPixels[i*(mImage->rows)+j] != initialValue) {
uniform = true;
break;
}
}
}
}
// Is uniform
if (uniform) {
this->root->value = initialValue;
this->root->NW = NULL;
this->root->SE = NULL;
this->root->SW = NULL;
this->root->NE = NULL;
return this->root;
}
else { // Division required - not uniform
this->root->value = 2; //Grey node
this->root->NW = new QTNode();
this->root->NE = new QTNode();
this->root->SE = new QTNode();
this->root->SW = new QTNode();
// Recursively split up subsquare into four smaller subsquares with dimensions half that of the original.
this->root->NW = buildQTRecur(mImage, startRow, startCol, subImageDim/2);
this->root->NE = buildQTRecur(mImage, startRow, startCol+subImageDim/2, subImageDim/2);
this->root->SW = buildQTRecur(mImage, startRow+subImageDim/2, startCol, subImageDim/2);
this->root->SE = buildQTRecur(mImage, startRow+subImageDim/2, startCol+subImageDim/2, subImageDim/2);
}
}
return this->root;
}
当我尝试运行它时，我陷入了无限循环。请让我知道查看其他内容是否会有所帮助，例如我的节点构造函数或任何其他帮助信息！
谢谢你。