draw4view.cpp

来自「计算机图形学」· C++ 代码 · 共 1,679 行 · 第 1/3 页

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			x --;
		}
		y ++;

	    pDC->SetPixel(x + x0,y + y0,color);
	    pDC->SetPixel(-x + x0,y + y0,color);
	    pDC->SetPixel(-x + x0,-y + y0,color);
	    pDC->SetPixel(x + x0,-y + y0,color);

	}

}

void CDraw4View::Draw04(int a, int b)
{
	int x,y,d,xP,yP,sa,sb,color = 0;
	int x0 = 300,y0 = 200;
	CDC* pDC = GetDC();

	sa = a*a;sb = b*b;
	xP = (int)(0.5 + (float)sa/sqrt((float)(sa + sb)));
	yP = (int)(0.5 + (float)sb/sqrt((float)(sa + sb)));
	x = 0;
	y = b;
	d = 4*(sb - sa*b) + sa;

    //pDC->SetPixel(x + x0,y + y0,color);
	//pDC->SetPixel(-x + x0,y + y0,color);
	pDC->SetPixel(-x + x0,-y + y0,color);
	pDC->SetPixel(x + x0,-y + y0,color);

	while(x <= xP)
	{
		if(d <= 0)
			d += 4*sb*(2*x + 3);
		else
		{
			d += 4*sb*(2*x + 3) - 8*sa*(y - 1);
			y --;
		}
		x ++;

	    //pDC->SetPixel(x + x0,y + y0,color);
	    //pDC->SetPixel(-x + x0,y + y0,color);
	    pDC->SetPixel(-x + x0,-y + y0,color);
	    pDC->SetPixel(x + x0,-y + y0,color);

	}
	x = a;
	y = 0;
	d = 4*(sa - sb*a) + sb;

	//pDC->SetPixel(x + x0,y + y0,color);
	//pDC->SetPixel(-x + x0,y + y0,color);
	pDC->SetPixel(-x + x0,-y + y0,color);
	pDC->SetPixel(x + x0,-y + y0,color);

	while(y <= yP)
	{
		if(d <= 0)
			d += 4*sa*(2*y + 3);
		else
		{
			d += 4*sa*(2*y + 3) - 8*sb*(x - 1);
			x --;
		}
		y ++;

	    //pDC->SetPixel(x + x0,y + y0,color);
	    //pDC->SetPixel(-x + x0,y + y0,color);
	    pDC->SetPixel(-x + x0,-y + y0,color);
	    pDC->SetPixel(x + x0,-y + y0,color);

	}

}

void CDraw4View::Draw05(int a, int b)
{
	int x,y,d,xP,yP,sa,sb,color = 0;
	int x0 = 300,y0 = 200;
	CDC* pDC = GetDC();

	sa = a*a;sb = b*b;
	xP = (int)(0.5 + (float)sa/sqrt((float)(sa + sb)));
	yP = (int)(0.5 + (float)sb/sqrt((float)(sa + sb)));
	x = 0;
	y = b;
	d = 4*(sb - sa*b) + sa;

	pDC->SetPixel(x + x0,y + y0,color);
	pDC->SetPixel(-x + x0,y + y0,color);
	pDC->SetPixel(-x + x0,-y + y0,color);
	pDC->SetPixel(x + x0,-y + y0,color);

	while(x <= xP)
	{
		if(d <= 0)
			d += 4*sb*(2*x + 3);
		else
		{
			d += 4*sb*(2*x + 3) - 8*sa*(y - 1);
			y --;
		}
		x ++;

	    pDC->SetPixel(x + x0,y + y0,color);
	    pDC->SetPixel(-x + x0,y + y0,color);
	    pDC->SetPixel(-x + x0,-y + y0,color);
	    pDC->SetPixel(x + x0,-y + y0,color);

	}
	x = a;
	y = 0;
	d = 4*(sa - sb*a) + sb;

	pDC->SetPixel(x + x0,y + y0,color);
	pDC->SetPixel(-x + x0,y + y0,color);
	pDC->SetPixel(-x + x0,-y + y0,color);
	pDC->SetPixel(x + x0,-y + y0,color);

	while(y <= yP)
	{
		if(d <= 0)
			d += 4*sa*(2*y + 3);
		else
		{
			d += 4*sa*(2*y + 3) - 8*sb*(x - 1);
			x --;
		}
		y ++;

	    pDC->SetPixel(x + x0,y + y0,color);
	    pDC->SetPixel(-x + x0,y + y0,color);
	    pDC->SetPixel(-x + x0,-y + y0,color);
	    pDC->SetPixel(x + x0,-y + y0,color);

	}

}

void CDraw4View::Draw06(int a, int b)
{
	int x,y,d,xP,yP,sa,sb,color = 0;
	int x0 = 300,y0 = 200;
	CDC* pDC = GetDC();

	sa = a*a;sb = b*b;
	xP = (int)(0.5 + (float)sa/sqrt((float)(sa + sb)));
	yP = (int)(0.5 + (float)sb/sqrt((float)(sa + sb)));
	x = 0;
	y = b;
	d = 4*(sb - sa*b) + sa;

	pDC->SetPixel(x + x0,y + y0,color);
	pDC->SetPixel(-x + x0,y + y0,color);
	//pDC->SetPixel(-x + x0,-y + y0,color);
	//pDC->SetPixel(x + x0,-y + y0,color);

	while(x <= xP)
	{
		if(d <= 0)
			d += 4*sb*(2*x + 3);
		else
		{
			d += 4*sb*(2*x + 3) - 8*sa*(y - 1);
			y --;
		}
		x ++;

	    pDC->SetPixel(x + x0,y + y0,color);
	    pDC->SetPixel(-x + x0,y + y0,color);
	    //pDC->SetPixel(-x + x0,-y + y0,color);
	    //pDC->SetPixel(x + x0,-y + y0,color);

	}
	x = a;
	y = 0;
	d = 4*(sa - sb*a) + sb;

	pDC->SetPixel(x + x0,y + y0,color);
	pDC->SetPixel(-x + x0,y + y0,color);
	//pDC->SetPixel(-x + x0,-y + y0,color);
	//pDC->SetPixel(x + x0,-y + y0,color);

	while(y <= yP)
	{
		if(d <= 0)
			d += 4*sa*(2*y + 3);
		else
		{
			d += 4*sa*(2*y + 3) - 8*sb*(x - 1);
			x --;
		}
		y ++;

	    pDC->SetPixel(x + x0,y + y0,color);
	    pDC->SetPixel(-x + x0,y + y0,color);
	    //pDC->SetPixel(-x + x0,-y + y0,color);
	    //pDC->SetPixel(x + x0,-y + y0,color);

	}

}

void CDraw4View::Draw07(int a, int b)
{
	int x,y,d,xP,yP,sa,sb,color = 0;
	int x0 = 300,y0 = 200;
	CDC* pDC = GetDC();

	sa = a*a;sb = b*b;
	xP = (int)(0.5 + (float)sa/sqrt((float)(sa + sb)));
	yP = (int)(0.5 + (float)sb/sqrt((float)(sa + sb)));
	x = 0;
	y = b;
	d = 4*(sb - sa*b) + sa;

	//pDC->SetPixel(x + x0,y + y0,color);
	//pDC->SetPixel(-x + x0,y + y0,color);
	pDC->SetPixel(-x + x0,-y + y0,color);
	pDC->SetPixel(x + x0,-y + y0,color);

	while(x <= xP)
	{
		if(d <= 0)
			d += 4*sb*(2*x + 3);
		else
		{
			d += 4*sb*(2*x + 3) - 8*sa*(y - 1);
			y --;
		}
		x ++;

	    //pDC->SetPixel(x + x0,y + y0,color);
	    //pDC->SetPixel(-x + x0,y + y0,color);
	    pDC->SetPixel(-x + x0,-y + y0,color);
	    pDC->SetPixel(x + x0,-y + y0,color);

	}
	x = a;
	y = 0;
	d = 4*(sa - sb*a) + sb;

	//pDC->SetPixel(x + x0,y + y0,color);
	//pDC->SetPixel(-x + x0,y + y0,color);
	pDC->SetPixel(-x + x0,-y + y0,color);
	pDC->SetPixel(x + x0,-y + y0,color);

	while(y <= yP)
	{
		if(d <= 0)
			d += 4*sa*(2*y + 3);
		else
		{
			d += 4*sa*(2*y + 3) - 8*sb*(x - 1);
			x --;
		}
		y ++;

	    //pDC->SetPixel(x + x0,y + y0,color);
	    //pDC->SetPixel(-x + x0,y + y0,color);
	    pDC->SetPixel(-x + x0,-y + y0,color);
	    pDC->SetPixel(x + x0,-y + y0,color);

	}

}

void CDraw4View::Draw08(int a, int b)
{
	int x,y,d,xP,yP,sa,sb,color = 0;
	int x0 = 212,y0 = 112;
	CDC* pDC = GetDC();

	sa = a*a;sb = b*b;
	xP = (int)(0.5 + (float)sa/sqrt((float)(sa + sb)));
	yP = (int)(0.5 + (float)sb/sqrt((float)(sa + sb)));
	x = 0;
	y = b;
	d = 4*(sb - sa*b) + sa;

	pDC->SetPixel(x + x0,y + y0,color);
	pDC->SetPixel(-x + x0,y + y0,color);
	pDC->SetPixel(-x + x0,-y + y0,color);
	pDC->SetPixel(x + x0,-y + y0,color);

	while(x <= xP)
	{
		if(d <= 0)
			d += 4*sb*(2*x + 3);
		else
		{
			d += 4*sb*(2*x + 3) - 8*sa*(y - 1);
			y --;
		}
		x ++;

	    pDC->SetPixel(x + x0,y + y0,color);
	    pDC->SetPixel(-x + x0,y + y0,color);
	    pDC->SetPixel(-x + x0,-y + y0,color);
	    pDC->SetPixel(x + x0,-y + y0,color);

	}
	x = a;
	y = 0;
	d = 4*(sa - sb*a) + sb;

	pDC->SetPixel(x + x0,y + y0,color);
	pDC->SetPixel(-x + x0,y + y0,color);
	pDC->SetPixel(-x + x0,-y + y0,color);
	pDC->SetPixel(x + x0,-y + y0,color);

	while(y <= yP)
	{
		if(d <= 0)
			d += 4*sa*(2*y + 3);
		else
		{
			d += 4*sa*(2*y + 3) - 8*sb*(x - 1);
			x --;
		}
		y ++;

	    pDC->SetPixel(x + x0,y + y0,color);
	    pDC->SetPixel(-x + x0,y + y0,color);
	    pDC->SetPixel(-x + x0,-y + y0,color);
	    pDC->SetPixel(x + x0,-y + y0,color);

	}

}

void CDraw4View::Draw09(int a, int b)
{
	int x,y,d,xP,yP,sa,sb,color = 0;
	int x0 = 212,y0 = 112;
	CDC* pDC = GetDC();

	sa = a*a;sb = b*b;
	xP = (int)(0.5 + (float)sa/sqrt((float)(sa + sb)));
	yP = (int)(0.5 + (float)sb/sqrt((float)(sa + sb)));
	x = 0;
	y = b;
	d = 4*(sb - sa*b) + sa;

	pDC->SetPixel(x + x0,y + y0,color);
	pDC->SetPixel(-x + x0,y + y0,color);
	pDC->SetPixel(-x + x0,-y + y0,color);
	pDC->SetPixel(x + x0,-y + y0,color);

	while(x <= xP)
	{
		if(d <= 0)
			d += 4*sb*(2*x + 3);
		else
		{
			d += 4*sb*(2*x + 3) - 8*sa*(y - 1);
			y --;
		}
		x ++;

	    pDC->SetPixel(x + x0,y + y0,color);
	    pDC->SetPixel(-x + x0,y + y0,color);
	    pDC->SetPixel(-x + x0,-y + y0,color);
	    pDC->SetPixel(x + x0,-y + y0,color);

	}
	x = a;
	y = 0;
	d = 4*(sa - sb*a) + sb;

	pDC->SetPixel(x + x0,y + y0,color);
	pDC->SetPixel(-x + x0,y + y0,color);
	pDC->SetPixel(-x + x0,-y + y0,color);
	pDC->SetPixel(x + x0,-y + y0,color);

	while(y <= yP)
	{
		if(d <= 0)
			d += 4*sa*(2*y + 3);
		else
		{
			d += 4*sa*(2*y + 3) - 8*sb*(x - 1);
			x --;
		}
		y ++;

	    pDC->SetPixel(x + x0,y + y0,color);
	    pDC->SetPixel(-x + x0,y + y0,color);
	    pDC->SetPixel(-x + x0,-y + y0,color);
	    pDC->SetPixel(x + x0,-y + y0,color);

	}

}

void CDraw4View::Draw10(int a, int b)
{
	int x,y,d,xP,yP,sa,sb,color = 0;
	int x0 = 388,y0 = 112;
	CDC* pDC = GetDC();

	sa = a*a;sb = b*b;
	xP = (int)(0.5 + (float)sa/sqrt((float)(sa + sb)));
	yP = (int)(0.5 + (float)sb/sqrt((float)(sa + sb)));
	x = 0;
	y = b;
	d = 4*(sb - sa*b) + sa;

	pDC->SetPixel(x + x0,y + y0,color);
	pDC->SetPixel(-x + x0,y + y0,color);
	pDC->SetPixel(-x + x0,-y + y0,color);
	pDC->SetPixel(x + x0,-y + y0,color);

	while(x <= xP)
	{
		if(d <= 0)
			d += 4*sb*(2*x + 3);
		else
		{
			d += 4*sb*(2*x + 3) - 8*sa*(y - 1);
			y --;
		}
		x ++;

	    pDC->SetPixel(x + x0,y + y0,color);
	    pDC->SetPixel(-x + x0,y + y0,color);
	    pDC->SetPixel(-x + x0,-y + y0,color);
	    pDC->SetPixel(x + x0,-y + y0,color);

	}
	x = a;
	y = 0;
	d = 4*(sa - sb*a) + sb;

	pDC->SetPixel(x + x0,y + y0,color);
	pDC->SetPixel(-x + x0,y + y0,color);
	pDC->SetPixel(-x + x0,-y + y0,color);
	pDC->SetPixel(x + x0,-y + y0,color);

	while(y <= yP)
	{
		if(d <= 0)
			d += 4*sa*(2*y + 3);
		else
		{
			d += 4*sa*(2*y + 3) - 8*sb*(x - 1);
			x --;
		}
		y ++;

	    pDC->SetPixel(x + x0,y + y0,color);
	    pDC->SetPixel(-x + x0,y + y0,color);
	    pDC->SetPixel(-x + x0,-y + y0,color);
	    pDC->SetPixel(x + x0,-y + y0,color);

	}

}

void CDraw4View::Draw11(int a, int b)
{
	int x,y,d,xP,yP,sa,sb,color = 0;
	int x0 = 388,y0 = 112;
	CDC* pDC = GetDC();

	sa = a*a;sb = b*b;
	xP = (int)(0.5 + (float)sa/sqrt((float)(sa + sb)));
	yP = (int)(0.5 + (float)sb/sqrt((float)(sa + sb)));
	x = 0;
	y = b;
	d = 4*(sb - sa*b) + sa;

	pDC->SetPixel(x + x0,y + y0,color);
	pDC->SetPixel(-x + x0,y + y0,color);
	pDC->SetPixel(-x + x0,-y + y0,color);
	pDC->SetPixel(x + x0,-y + y0,color);

	while(x <= xP)
	{
		if(d <= 0)
			d += 4*sb*(2*x + 3);
		else
		{
			d += 4*sb*(2*x + 3) - 8*sa*(y - 1);
			y --;
		}
		x ++;

	    pDC->SetPixel(x + x0,y + y0,color);
	    pDC->SetPixel(-x + x0,y + y0,color);
	    pDC->SetPixel(-x + x0,-y + y0,color);
	    pDC->SetPixel(x + x0,-y + y0,color);

	}
	x = a;
	y = 0;
	d = 4*(sa - sb*a) + sb;

	pDC->SetPixel(x + x0,y + y0,color);
	pDC->SetPixel(-x + x0,y + y0,color);
	pDC->SetPixel(-x + x0,-y + y0,color);
	pDC->SetPixel(x + x0,-y + y0,color);

	while(y <= yP)
	{
		if(d <= 0)
			d += 4*sa*(2*y + 3);
		else
		{
			d += 4*sa*(2*y + 3) - 8*sb*(x - 1);
			x --;
		}
		y ++;

	    pDC->SetPixel(x + x0,y + y0,color);
	    pDC->SetPixel(-x + x0,y + y0,color);
	    pDC->SetPixel(-x + x0,-y + y0,color);
	    pDC->SetPixel(x + x0,-y + y0,color);

	}

}


void CDraw4View::Draw12(int a, int b)
{
	int x,y,d,xP,yP,sa,sb,color = 0;
	int x0 = 300,y0 = 200;
	CDC* pDC = GetDC();

	sa = a*a;sb = b*b;
	xP = (int)(0.5 + (float)sa/sqrt((float)(sa + sb)));
	yP = (int)(0.5 + (float)sb/sqrt((float)(sa + sb)));
	x = 0;
	y = b;
	d = 4*(sb - sa*b) + sa;

	if(y+y0 > 212)
	{
	pDC->SetPixel(x + x0,y + y0,color);
	pDC->SetPixel(-x + x0,y + y0,color);
	//pDC->SetPixel(-x + x0,-y + y0,color);
	//pDC->SetPixel(x + x0,-y + y0,color);
	}

	while(x <= xP)
	{
		if(d <= 0)
			d += 4*sb*(2*x + 3);
		else
		{
			d += 4*sb*(2*x + 3) - 8*sa*(y - 1);
			y --;
		}
		x ++;

	    if(y+y0>212)
		{
123

draw4view.cpp - 源码说明

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