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   源码介绍

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新手或者入行的值得看看

#define _CRT_SECURE_NO_WARNINGS		//防止新编译器老函数使用报错
#include "DXFRead.h"


using namespace std;

IMPLEMENT_DYNCREATE(LINEPoint, CObject)
IMPLEMENT_DYNCREATE(BLOCKPoint, CObject)

#define FILENAME "2.dxf"
#define SAVENAME "2.png"

LINEPoint::LINEPoint(CADLINE &line)
{
	m_line = line;
}

BLOCKPoint::BLOCKPoint(CADBLOCK &block)
{
	m_block = block;
}

void DXFRead::ReadLine(CADDATA &data)
{
	
	FILE *fp = fopen(FILENAME, "r");
	if (!fp)
	{
		cout << "读取" << FILENAME << "失败，任意键退出" << endl;
		getchar();
		exit(0);
	}
	else
	{
		cout << "打开" << FILENAME << "成功，正在读取LINE..." << endl;
	}
	while (!feof(fp) && !ferror(fp))
	{
		fscanf(fp, "%s", &str);
		//扫描块中线
		if (strcmp(str, "BLOCK") == 0)
		{
			fscanf(fp, "%s", &str);
			while (strcmp(str, "2") != 0)
			{
				fscanf(fp, "%s", &str);
			}
			//获得块名字
			fscanf(fp, "%s", &name);
			//如果不是这两个块，做记录
			if (strcmp(name,"$MODEL_SPACE") != 0 
				&& strcmp(name, "$PAPER_SPACE") != 0)
			{
				while (strcmp(str, "ENDBLK") != 0)
				{
					fscanf(fp, "%s", &str);
					//扫描块中线
					if (strcmp(str, "LINE") == 0)
					{
						//归属块
						strcpy(tempLine.name, name);
						//x1
						while (strcmp(str, "10") != 0)
						{
							fscanf(fp, "%s", &str);
						}
						fscanf(fp, "%s", &str);
						tempLine.x1 = atof(str);

						//y1
						while (strcmp(str, "20") != 0)
						{
							fscanf(fp, "%s", &str);
						}
						fscanf(fp, "%s", &str);
						tempLine.y1 = atof(str);

						//z1
						while (strcmp(str, "30") != 0)
						{
							fscanf(fp, "%s", &str);
						}
						fscanf(fp, "%s", &str);
						tempLine.z1 = atof(str);

						//x2
						while (strcmp(str, "11") != 0)
						{
							fscanf(fp, "%s", &str);
						}
						fscanf(fp, "%s", &str);
						tempLine.x2 = atof(str);

						//y2
						while (strcmp(str, "21") != 0)
						{
							fscanf(fp, "%s", &str);
						}
						fscanf(fp, "%s", &str);
						tempLine.y2 = atof(str);

						//z2
						while (strcmp(str, "31") != 0)
						{
							fscanf(fp, "%s", &str);
						}
						fscanf(fp, "%s", &str);
						tempLine.z2 = atof(str);

						data.LINE.Add(new LINEPoint(tempLine));
					}
				}
			}
			
		}
		//扫描主坐标系线
		else if (strcmp(str, "LINE") == 0)
		{
			//归属块
			strcpy(tempLine.name, "ReferenceBlock");
			//x1
			while (strcmp(str, "10") != 0)
			{
				fscanf(fp, "%s", &str);
			}
			fscanf(fp, "%s", &str);
			tempLine.x1 = atof(str);

			//y1
			while (strcmp(str, "20") != 0)
			{
				fscanf(fp, "%s", &str);
			}
			fscanf(fp, "%s", &str);
			tempLine.y1 = atof(str);

			//z1
			while (strcmp(str, "30") != 0)
			{
				fscanf(fp, "%s", &str);
			}
			fscanf(fp, "%s", &str);
			tempLine.z1 = atof(str);

			//x2
			while (strcmp(str, "11") != 0)
			{
				fscanf(fp, "%s", &str);
			}
			fscanf(fp, "%s", &str);
			tempLine.x2 = atof(str);

			//y2
			while (strcmp(str, "21") != 0)
			{
				fscanf(fp, "%s", &str);
			}
			fscanf(fp, "%s", &str);
			tempLine.y2 = atof(str);

			//z2
			while (strcmp(str, "31") != 0)
			{
				fscanf(fp, "%s", &str);
			}
			fscanf(fp, "%s", &str);
			tempLine.z2 = atof(str);

			data.LINE.Add(new LINEPoint(tempLine));
		}
	}
	cout << "LINE读取完毕..." << endl;
	fclose(fp);
}

void DXFRead::ReadInsert(CADDATA &data)
{
	FILE *fp = fopen(FILENAME, "r");
	fp = fopen(FILENAME, "r");
	if (!fp)
	{
		cout << "读取" << FILENAME << "失败，任意键退出" << endl;
		getchar();
		exit(0);
	}
	else
	{
		cout << "打开" << FILENAME << "成功，正在读取BLOCK插入信息..." << endl;
	}
	while (!feof(fp) && !ferror(fp))
	{
		fscanf(fp, "%s", &str);
		if (strcmp(str, "INSERT") == 0)
		{
			//读取插入块名字
			while (strcmp(str, "2") != 0)
			{
				fscanf(fp, "%s", &str);
			}
			fscanf(fp, "%s", &str);
			strcpy(tempBlock.name, str);

			//基点坐标
			//rx
			while (strcmp(str, "10") != 0)
			{
				fscanf(fp, "%s", &str);
			}
			fscanf(fp, "%s", &str);
			tempBlock.rx = atof(str);

			//ry
			while (strcmp(str, "20") != 0)
			{
				fscanf(fp, "%s", &str);
			}
			fscanf(fp, "%s", &str);
			tempBlock.ry = atof(str);

			//rz
			while (strcmp(str, "30") != 0)
			{
				fscanf(fp, "%s", &str);
			}
			fscanf(fp, "%s", &str);
			tempBlock.rz = atof(str);

			//读取比例因子
			//cx
			while (strcmp(str, "41") != 0)
			{
				fscanf(fp, "%s", &str);
			}
			fscanf(fp, "%s", &str);
			tempBlock.cx = atof(str);

			//cy
			while (strcmp(str, "42") != 0)
			{
				fscanf(fp, "%s", &str);
			}
			fscanf(fp, "%s", &str);
			tempBlock.cy = atof(str);

			//cz
			while (strcmp(str, "43") != 0)
			{
				fscanf(fp, "%s", &str);
			}
			fscanf(fp, "%s", &str);
			tempBlock.cz = atof(str);

			data.BLOCK.Add(new BLOCKPoint(tempBlock));
		}
	}
	cout << "BLOCK插入信息读取完毕..." << endl;
	fclose(fp);
}
void DXFRead::DrawImage(CADDATA &data)
{
	LINEPoint *linep = NULL;
	BLOCKPoint *blockp = NULL;
	uchar* Img = NULL;
	cout << "开始绘图..." << endl;

	//创建图像，深度为8，3通道RGB图像 
	cvImg = cvCreateImage(cvSize(15000, 15000), 8, 3); 
	Img = (uchar *)cvImg->imageData;

	int step = cvImg->widthStep / sizeof(uchar);
	int channels = cvImg->nChannels;
	//清空图像
	for (int i = 0; i<cvImg->height; i  )
		for (int j = 0; j<cvImg->width; j  ) {
			Img[i*step   j*channels   0] = 0;
			Img[i*step   j*channels   1] = 0;
			Img[i*step   j*channels   2] = 0;
		}
	for (int i = 0; i < data.LINE.GetCount(); i  )
	{
		linep = (LINEPoint*)data.LINE.GetAt(i);
		//如果是正常线
		if (strcmp(linep->m_line.name, "ReferenceBlock") == 0 )
		{
			cvLine(cvImg,
				cvPoint(20 * ((linep->m_line.x1)   300), 20 * ((linep->m_line.y1)   300)),
				cvPoint(20 * ((linep->m_line.x2)   300), 20 * ((linep->m_line.y2)   300)),
				CV_RGB(0, 255, 0), 4);
		}
		else
		{
			for (int j = 0; j < data.BLOCK.GetCount(); j  )
			{
				//获取线归属块信息
				blockp = (BLOCKPoint*)data.BLOCK.GetAt(j);
				if (strcmp(linep->m_line.name, blockp->m_block.name) == 0)
				{
					cvLine(cvImg,
						cvPoint(20 * ( (blockp->m_block.cx) *(linep->m_line.x1)   blockp->m_block.rx   300), 20 * ((blockp->m_block.cy) *(linep->m_line.y1)   blockp->m_block.ry   300  )  ),
						cvPoint(20 * ((blockp->m_block.cx) *(linep->m_line.x2)   blockp->m_block.rx   300), 20 * ( (blockp->m_block.cy) *(linep->m_line.y2)   blockp->m_block.ry   300  )  ),
						CV_RGB(0, 255, 0), 4);
				}
			}
		}
		
	}
	cvSaveImage(SAVENAME, cvImg);
	//释放图像所占的内存
	cvReleaseImage(&cvImg); 
}

int main()
{
	CADDATA cadData;
	DXFRead readData;
	readData.ReadLine(cadData);
	readData.ReadInsert(cadData);
	readData.DrawImage(cadData);
	return 0;
}