Tweetable Mathematical Art 太极八卦图

从Matrix67 blog里面看到了Tweetable Mathematical Art。

使用C++实现3个函数RD(i, j), GR(i, j), BL(i, j)分别返回像素(i, j)的R/G/B值，最终生成1幅1024*1024的图片。要求是每个函数代码不超过140字符，即Tweetable。

来个太极八卦图，娱乐一下。

unsigned char RD(int i,int j){
    // YOUR CODE HERE
#define LEFT (i < DIM/2)
#define C1 C(DIM/2, DIM/2, DIM/2)
#define C2 C(DIM/2, DIM/4, DIM/4)
    return BL(i, j);
}
unsigned char GR(int i,int j){
    // YOUR CODE HERE
#define C3 C(DIM/2, 3*DIM/4, DIM/4)
#define C4 C(DIM/2, DIM/4, DIM/16)
#define C5 C(DIM/2, 3*DIM/4, DIM/16)
    return BL(i, j);
}
unsigned char BL(int i,int j){
    // YOUR CODE HERE
#define C(x, y, r) (_sq(i - (x)) + _sq(j - (y)) < _sq((r)))
    return !C1 ? 127 : C2 ? C4 ? 255 : 0 : C3 ? C5 ? 0: 255 : LEFT ? 0 :255;
}
unsigned char RD(int i,int j){
#define r(n)(rand()%n)
static char c[1024][1024];return!c[i][j]?c[i][j]=!r(999)?r(256):RD((i+r(2))%1024,(j+r(2))%1024):c[i][j];
}

生成图片