double CRoseView::S(double a)
{
return sin(a);
}
double CRoseView::C(double a)
{
return cos(a);
}
double CRoseView::P(double a, double b)
{
return pow(a, b);
}
这是源代码
double CRoseView::R()
{
double temp;
temp = rand() / 36635.0;
return temp;
}
void CRoseView::comp(double a, double b, double c)
{
int j;
double A, B;
if (c > 60) //»¨¾¥
{
ds.a = S(a * 7) * (13 + 5 / (0.2 + P(b * 4, 4))) - S(b) * 50;
ds.b = b * f + 50;
ds.c = 625 + C(a * 7) * (13 + 5 / (.2 + P(b * 4, 4))) + b * 400;
ds.d = a - b / 2;
ds.e = a;
return;
}
A = a * 2 - 1;
B = b * 2 - 1;
if (A * A + B * B < 1)
{
if (c > 37) //»¨Ò¶
{
j = (int)c & 1;
double n = j ? 6 : 4;
double o = .5 / (a + .01) + C(b * 125) * 3 - a * 300;
double w = b * h;
ds.a = o * C(n) + w * S(n) + j * 610 - 390;
ds.b = o * S(n) - w * C(n) + 550 - j * 350;
ds.c = 1180 + C(B + A) * 99 - j * 300;
ds.d = .4 - a * .1 + P(1 - B * B, -h * 6) * .15 - a * b * .4 + C(a + b) / 5 + P(C((o * (a + 1) + (B > 0 ? w : -w)) / 25), 30) * .1 * (1 - B * B);
ds.e = o / 1e3 + .7 - o * w * 3e-6;
return;
}
else if (c > 32) //ÝàƬ
{
c = c * 1.16 - .15;
double o = a * 45 - 20;
double w = b * b * h;
double z = o * S(c) + w * C(c) + 620;
ds.a = o * C(c) - w * S(c);
ds.b = 28 + C(B * .5) * 99 - b * b * b * 60 - z / 2 - h;
ds.c = z;
ds.d = (b * b * .3 + P((1 - (A * A)), 7) * .15 + .3) * b;
ds.e =b * .7;
return;
}
else //Ȭ
{
double o = A * (2 - b) * (80 - c * 2);
double w = 99 - C(A) * 120 - C(b) * (-h - c * 4.9) + C(P(1 - b, 7)) * 50 + c * 2;
double z = o * S(c) + w * C(c) + 700;
ds.a = o * C(c) - w * S(c);
ds.b = B * 99 - C(P(b, 7)) * 50 - c / 3 - z / 1.35 + 450;
ds.c = z;
ds.d = (1 - b / 1.2) * .9 + a * .1;
ds.e = P((1 - b), 20) / 4 + .05;
return;
}
}
}
void CRoseView::DrawRose()
{
static int x = 1, y = 1;
static int i = 0, j = 0;
static int x1 = 1, y1 =1;
int z = 1;
int r = 255, g = 0, b = 0;
j = i%46;
comp(R(), R(), j/.74);
i++;
z = ds.c;
if (z == 0)
{
z = 1;
}
x = (int)(ds.a * f / z - h);
y = (int)(ds.b * f / z - h);
x/=2;
y/=2;
int q = y * f + x;
if (!(!m[q]|m[q] > z))
return;
m[q] = z;
r = ds.d * h;
g = ds.e * h;
b = ds.d * ds.d * (-80);
if (flag)
{
memDc.FillSolidRect(0, 0, width, heigh, RGB(255, 255, 255));
flag = false;
}
r = -r;
g = -g;
b = -b;
memDc.SetPixel(x, y, RGB(r, g, b));
pDc->BitBlt(0, 0, width, heigh, &memDc, 0, 0, SRCCOPY);
}