计算机图形学画圆并改变线宽

1、Bresenham画圆法改变线宽（红色为添加代码部分）void BresenhamCircle(int R,CDC *pDC) int x0,y0,x,y,p; x0=100; y0=100; x = x0; y=y0 + R; p=3-2*R; for(;xSetPixel(x,y,RGB(255,0,0); pDC-SetPixel(x,2*y0-y,RGB(255,0,0); pDC-SetPixel(y,x,RGB(255,0,0); pDC-SetPixel(2*y0-y,x,RGB(255,0,0); pDC-SetPixel(2*x0-x,y,RGB(255,0,0); pDC-

2、SetPixel(y,2*x0-x,RGB(255,0,0); pDC-SetPixel(2*x0-x,2*y0-y,RGB(255,0,0); pDC-SetPixel(2*y0-y,2*x0-x,RGB(255,0,0); if(p=0) p+=4*(x-y)+10; y-; else p+=4*(x-x0)+6; void RasterScanFillCircle(CDC *pDC, int x0, int y0, int r, int width, int color)int x, y;for(x=0;x=0;y-)if(x)*(x)+(y)*(y)=r*r & (x)*(x)+(y)

3、*(y)SetPixel(x+x0,y+y0,color); pDC-SetPixel(x0-x,y+y0,color); pDC-SetPixel(x0-x,y0-y,color); pDC-SetPixel(x+x0,y0-y,color);void CCircleView:OnDraw(CDC* pDC)CCircleDoc* pDoc = GetDocument();ASSERT_VALID(pDoc);/ TODO: add draw code for native data hereBresenhamCircle(50,pDC);RasterScanFillCircle(pDC,3

4、00,100,50,5,RGB(255,0,0); 中点画圆法改变线宽void MidpointCircle(CDC *pdc,int x0,int y0,int r,int color) int x,y; float d; x=0; y=r; d=1.25-r; pdc-SetPixel(x0+x,y0-y,color); while(x=y) x+; if(dSetPixel(x0+x,y0-y,color); pdc-SetPixel(x0-x,y0-y,color); pdc-SetPixel(x0+x,y0+y,color); pdc-SetPixel(x0-x,y0+y,color

5、); pdc-SetPixel(x0+y,y0-x,color); pdc-SetPixel(x0-y,y0-x,color); pdc-SetPixel(x0+y,y0+x,color); pdc-SetPixel(x0-y,y0+x,color); void RasterScanFillCircle(CDC *pDC, int x0, int y0, int r, int width, int color)int x, y;for(x=0;x=0;y-)if(x)*(x)+(y)*(y)=r*r & (x)*(x)+(y)*(y)SetPixel(x+x0,y+y0,color); pDC

6、-SetPixel(x0-x,y+y0,color); pDC-SetPixel(x0-x,y0-y,color); pDC-SetPixel(x+x0,y0-y,color);void CCircleView:OnDraw(CDC* pDC)CCircleDoc* pDoc = GetDocument();ASSERT_VALID(pDoc);/ TODO: add draw code for native data hereint x0,y0; x0=100,y0=100; int r=80; int color=RGB(255,0,255); CClientDC dc(this); MidpointCircle(&dc,x0,y0,r,color);RasterScanFillCircle(pDC,300,100,80,5,RGB(255,0,0);内容总结（1）Bresenham画圆法改变线宽（红色为添加代码部分）void BresenhamCircle(int R,CDC *pDC) int x