?? perfect.c

?? 計算機圖形學
?? C
?? 第 1 頁 / 共 5 頁
字號:
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x04,0x00,0x1F,0xCF,0xF8,
0x38,0xC6,0x38,0x10,0xC4,0x18,0x10,0xC6,
0x38,0x1F,0xC7,0xF8,0x10,0xCC,0x18,0x10,
0xCC,0x38,0x1F,0xCF,0xF8,0x1F,0x9C,0x38,
0x00,0x18,0x38,0x00,0x30,0x38,0x01,0xF0,
0x18,0x03,0xE0,0x18,0x00,0x00,0x10,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
};

char ban24[]={
/* 以下是 '班' 的 24點陣隸書 字模，72 byte */
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x10,0x00,0x00,0x18,0x00,
0x1F,0xDF,0xF0,0x1F,0x99,0x80,0x06,0x19,
0x80,0x06,0x79,0x80,0x1F,0xBD,0x80,0x06,
0x1F,0xF0,0x06,0x19,0x80,0x07,0xF9,0x80,
0x7F,0x31,0x80,0x70,0x77,0xE0,0x00,0xEF,
0xFE,0x03,0xC0,0x0C,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
};

char ji24[]={
/* 以下是 '級' 的 24點陣隸書 字模，72 byte */
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x03,0x3F,0xE0,
0x07,0x2C,0xC0,0x0C,0x0C,0xC0,0x19,0x8C,
0xC0,0x3B,0x0C,0xF0,0x3E,0x0C,0x20,0x0C,
0xDB,0x60,0x1F,0x19,0xE0,0x18,0x50,0xE0,
0x03,0xB1,0xF8,0x7E,0x63,0x3E,0x78,0xFC,
0x1E,0x01,0x80,0x0C,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
};

char xin24[]={
/* 以下是 '信' 的 24點陣隸書 字模，72 byte */
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x8C,0x00,0x03,0x0F,0x00,
0x07,0x00,0x00,0x3E,0xFF,0xFE,0x7F,0xF1,
0xFE,0x7E,0x1F,0x8C,0x0E,0x10,0x00,0x0E,
0x3F,0xC0,0x0E,0x20,0x00,0x0E,0x2E,0x00,
0x0E,0x7F,0xE0,0x0E,0x60,0x60,0x0E,0x70,
0xE0,0x0E,0x3F,0xE0,0x04,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
};

char ke24[]={
/* 以下是 '科' 的 24點陣隸書 字模，72 byte */
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0xC0,0xE0,0x1F,0xC0,0x60,
0x01,0x8E,0x60,0x11,0xC3,0x60,0x3F,0xE0,
0x60,0x03,0x9E,0x60,0x07,0x80,0x60,0x0F,
0xE0,0x60,0x1D,0x9F,0xFE,0x39,0x98,0x64,
0xF1,0x80,0x60,0x01,0x80,0x60,0x03,0x80,
0x60,0x03,0x80,0x60,0x01,0x00,0x40,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
};

char zero24[]={
/* 以下是 '０' 的 24點陣隸書 字模，72 byte */
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x18,0x00,0x00,0x7C,0x00,0x00,0xC6,0x00,
0x00,0xC3,0x00,0x01,0x83,0x00,0x01,0x83,
0x80,0x01,0x83,0x80,0x03,0x83,0x80,0x03,
0x83,0x80,0x03,0x83,0x80,0x03,0x83,0x80,
0x01,0x83,0x80,0x01,0x83,0x00,0x01,0x83,
0x00,0x00,0xC3,0x00,0x00,0xE6,0x00,0x00,
0x3C,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
};

char three24[]={
/* 以下是 '３' 的 24點陣隸書 字模，72 byte */
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x1C,0x00,0x00,0x3F,0x00,0x00,0x67,0x00,
0x00,0x03,0x80,0x00,0x03,0x00,0x00,0x03,
0x00,0x00,0x02,0x00,0x00,0x06,0x00,0x00,
0x1F,0x00,0x00,0x03,0x80,0x00,0x01,0x80,
0x00,0x01,0x80,0x00,0x01,0x80,0x00,0x01,
0x80,0x00,0x01,0x80,0x00,0xE3,0x00,0x00,
0x7C,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
};

char four24[]={
/* 以下是 '４' 的 24點陣隸書 字模，72 byte */
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x02,0x00,0x00,0x06,0x00,0x00,0x0E,0x00,
0x00,0x0E,0x00,0x00,0x16,0x00,0x00,0x36,
0x00,0x00,0x26,0x00,0x00,0x46,0x00,0x00,
0xC6,0x00,0x01,0x86,0x00,0x03,0x06,0x00,
0x03,0xFF,0x80,0x00,0x06,0x00,0x00,0x06,
0x00,0x00,0x06,0x00,0x00,0x06,0x00,0x00,
0x06,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
};

char zhuan24[]={
/* 以下是 '專' 的 24點陣隸書 字模，72 byte */
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x20,0x00,0x00,0x70,0x00,0x00,0x30,0x00,
0x0F,0xFF,0xE0,0x1E,0x30,0x00,0x00,0x70,
0x00,0x7F,0xFF,0xFE,0x7E,0x73,0xFE,0x40,
0x70,0x1C,0x00,0x7F,0x80,0x00,0x43,0xC0,
0x01,0x87,0x00,0x01,0xEE,0x00,0x00,0xF8,
0x00,0x00,0x1E,0x00,0x00,0x03,0x80,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
};

char ye24[]={
/* 以下是 '業' 的 24點陣隸書 字模，72 byte */
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x04,0x00,0x00,0xEE,0x00,
0x00,0xEE,0x00,0x18,0xEE,0x00,0x18,0xEE,
0x30,0x1C,0xEE,0x70,0x0C,0xEE,0x60,0x06,
0xEE,0xC0,0x02,0xEF,0x80,0x01,0xEE,0x00,
0x00,0xEE,0x00,0x3F,0xFF,0xFE,0x7F,0xFF,
0xFE,0x60,0x00,0x7C,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
};


char zhang24[]={
/* 以下是 '章' 的 24點陣隸書 字模，72 byte */
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x10,0x00,0x00,0x38,0x00,0x0F,0xFF,0xE0,
0x08,0xC3,0x00,0x21,0xFF,0xC0,0x7F,0x01,
0xFE,0x43,0xFF,0xCC,0x03,0x80,0xC0,0x03,
0xFF,0xC0,0x03,0x80,0xC0,0x03,0xFF,0xC0,
0x08,0x38,0x00,0x1F,0xFF,0xF8,0x00,0x38,
0x00,0x00,0x38,0x00,0x00,0x18,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
};

char zong24[]={
/* 以下是 '宗' 的 24點陣隸書 字模，72 byte */
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x18,0x00,0x00,0x1C,0x00,
0x0F,0xFF,0xF8,0x1C,0x00,0x18,0x08,0x80,
0x18,0x09,0xFF,0x18,0x08,0x00,0x10,0x3F,
0xFF,0xFE,0x7F,0xFF,0xFE,0x60,0x19,0x0E,
0x01,0x99,0xC0,0x03,0x1C,0xE0,0x06,0x1C,
0x70,0x18,0x7C,0x1C,0x00,0x30,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
};

char chang24[]={
/* 以下是 '長' 的 24點陣隸書 字模，72 byte */
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x03,0x80,0x00,0x03,0x81,0xC0,
0x01,0x87,0x80,0x01,0xFE,0x00,0x01,0xC0,
0x00,0x01,0x80,0x00,0x7F,0xFF,0xF0,0x79,
0x80,0x00,0x01,0xB8,0x00,0x01,0x8E,0x00,
0x03,0x83,0xC0,0x03,0x9D,0xFC,0x03,0xF0,
0xFE,0x03,0xE0,0x7C,0x03,0x80,0x18,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
};

char lai24[]={
/* 以下是 '賴' 的 24點陣隸書 字模，72 byte */
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x03,0x01,0xC0,0x03,0x03,0xF0,
0x1F,0xFE,0xF0,0x1B,0x08,0x40,0x0F,0xEF,
0xF8,0x1B,0x6C,0x78,0x1B,0x24,0x98,0x1F,
0xE4,0xD8,0x03,0x04,0x98,0x07,0x8C,0x98,
0x3B,0x6D,0x88,0x73,0x01,0x60,0x03,0x07,
0x38,0x03,0x3E,0x1C,0x03,0x00,0x02,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
};

char xin124[]={
/* 以下是 '欣' 的 24點陣隸書 字模，72 byte */
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x0E,0x00,0x18,0xEE,0x00,
0x1F,0xEE,0x30,0x0C,0x0F,0xF0,0x0C,0x0C,
0x70,0x0F,0xEC,0x80,0x0F,0x9E,0x00,0x0D,
0xA6,0x00,0x0D,0xC7,0x80,0x19,0x8D,0xC0,
0x39,0x8C,0xF0,0x71,0x98,0x7C,0x70,0x70,
0x3E,0x01,0xE0,0x1C,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
};

char mao24[]={
/* 以下是 '毛' 的 24點陣隸書 字模，72 byte */
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x01,0xC0,0x00,0xFF,0xC0,
0x0F,0xFE,0x00,0x00,0x60,0x00,0x00,0xFF,
0x80,0x0F,0xFF,0x80,0x08,0xE0,0x00,0x10,
0xFF,0xE0,0x7F,0xFF,0xE0,0x70,0xE0,0x00,
0x00,0xE0,0x00,0x00,0x78,0x06,0x00,0x3F,
0xFE,0x00,0x0F,0xFC,0x00,0x00,0xF8,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
};

char feng24[]={
/* 以下是 '鋒' 的 24點陣隸書 字模，72 byte */
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x03,0x03,0x00,0x06,0x07,0xC0,
0x0F,0xCC,0xC0,0x3C,0x3F,0x80,0x70,0x27,
0x80,0x0F,0x9E,0xF8,0x07,0x7B,0x3E,0x3F,
0xCF,0xEC,0x3E,0x03,0x00,0x06,0x0F,0xE0,
0x06,0x5F,0x00,0x07,0xBB,0xF0,0x0F,0x03,
0x00,0x0E,0x03,0x00,0x00,0x03,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
};

char xie24[]={
/* 以下是 '謝' 的 24點陣隸書 字模，72 byte */
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x30,0x30,0x1C,0x30,0x30,
0x0E,0xFC,0x30,0x01,0xCC,0x30,0x7C,0xFF,
0xFF,0x7E,0xCF,0xBE,0x0C,0x7D,0x30,0x0C,
0xCD,0x30,0x0D,0xFD,0xB0,0x0D,0x9C,0xB0,
0x0F,0x3C,0x30,0x0E,0x6C,0x30,0x1D,0x8C,
0x70,0x08,0x3B,0xF0,0x00,0x00,0xC0,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
};

char le24[]={
/* 以下是 '樂' 的 24點陣隸書 字模，72 byte */
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x04,0x03,0xC0,0x0F,0xFF,0xC0,
0x0E,0x00,0x00,0x0C,0x18,0x00,0x0C,0x18,
0x00,0x0E,0x1C,0x00,0x1F,0xFF,0xF8,0x1C,
0x18,0x30,0x00,0x99,0x00,0x03,0x99,0xC0,
0x0F,0x18,0xF0,0x3C,0x18,0x7E,0x70,0x38,
0x1E,0x00,0xF8,0x0C,0x00,0x30,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
};

char wu24[]={
/* 以下是 '吳' 的 24點陣隸書 字模，72 byte */
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x03,0xC3,0x80,0x03,0xFF,0x80,
0x03,0x01,0x80,0x03,0xFF,0x80,0x01,0x01,
0x80,0x02,0x00,0x00,0x07,0xFF,0xE0,0x00,
0x30,0x00,0x7F,0xFF,0xFC,0x7C,0x70,0xFE,
0x40,0x64,0x0C,0x01,0xC7,0x00,0x07,0xC7,
0x80,0x1F,0x01,0xC0,0x00,0x00,0x70,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
};

char duo24[]={
/* 以下是 '朵' 的 24點陣隸書 字模，72 byte */
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x82,0x00,0x00,0xFE,0x00,
0x00,0xC6,0x00,0x00,0xC6,0x00,0x00,0xC7,
0xF0,0x03,0x83,0xE0,0x02,0x18,0xC0,0x3F,
0xFF,0xC0,0x3F,0xFF,0xFE,0x70,0x98,0x3E,
0x01,0x9B,0x80,0x07,0x19,0xC0,0x0C,0x18,
0x60,0x10,0x18,0x30,0x00,0x10,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
};

char liu24[]={
/* 以下是 '劉' 的 24點陣隸書 字模，72 byte */
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x01,0x80,0x38,0x01,0x80,0x38,
0x13,0xF3,0x38,0x3F,0xFB,0x38,0x00,0x23,
0x38,0x0C,0x63,0x18,0x06,0x63,0x18,0x07,
0xC3,0x18,0x01,0x83,0x18,0x03,0xC0,0x18,
0x1F,0x60,0x18,0x7C,0x30,0x38,0x70,0x13,
0x78,0x00,0x01,0xF0,0x00,0x00,0xE0,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
};

char wei24[]={
/* 以下是 '煒' 的 24點陣隸書 字模，72 byte */
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x04,0x03,0x00,0x06,0x03,0x00,
0x06,0x3F,0xF8,0x26,0x43,0x00,0x36,0xC3,
0x00,0x26,0xBF,0xE0,0x26,0x03,0x00,0x26,
0x7F,0xFE,0x04,0xE3,0x0E,0x0E,0x03,0x1C,
0x0F,0x03,0x38,0x18,0xC3,0xC0,0x70,0x03,
0x00,0x60,0x03,0x00,0x00,0x02,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
};

char dui24[]={
/* 以下是 '隊' 的 24點陣隸書 字模，72 byte */
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x04,0x00,0x3F,0xCE,0x00,
0x79,0xCE,0x00,0x19,0x8C,0x00,0x1B,0x0C,
0x00,0x1F,0x0C,0x00,0x18,0x8E,0x00,0x18,
0xCF,0x00,0x19,0x9B,0x80,0x1F,0x19,0xC0,
0x18,0x30,0xF0,0x18,0xE0,0x7E,0x1B,0xC0,
0x3E,0x1B,0x80,0x1C,0x10,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
};

char yuan24[]={
/* 以下是 '員' 的 24點陣隸書 字模，72 byte */
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x01,0xFF,0xC0,0x01,0x80,0xC0,
0x01,0x80,0xC0,0x01,0xFF,0xC0,0x00,0x00,
0x40,0x07,0xFF,0xE0,0x07,0x18,0x60,0x03,
0x18,0x60,0x03,0x18,0x60,0x03,0x38,0x60,
0x03,0x37,0x60,0x00,0xE7,0x80,0x03,0xC1,
0xE0,0x7F,0x80,0x78,0x00,0x00,0x0C,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
};

char ming224[]={
/* 以下是 '名' 的 24點陣隸書 字模，72 byte */
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x0C,0x00,0x00,0x3E,0x00,
0x03,0xF3,0xF0,0x1F,0xE1,0xF0,0x00,0x7B,
0xE0,0x00,0x0F,0x00,0x00,0x7C,0x00,0x03,
0xE0,0x00,0x7F,0xFF,0xF8,0x38,0xE1,0xF8,
0x00,0xC0,0x18,0x00,0xC0,0x18,0x00,0xFF,
0xF8,0x00,0xFF,0xF8,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
};

char dan24[]={
/* 以下是 '單' 的 24點陣隸書 字模，72 byte */
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0xC3,0x00,0x00,0x62,0x00,
0x07,0xFF,0xF0,0x07,0x18,0x70,0x06,0x18,
0x20,0x07,0xFF,0xE0,0x02,0x18,0x20,0x03,
0xFF,0xE0,0x00,0x18,0x00,0x3F,0xFF,0xF8,
0x7F,0xFF,0xFE,0x60,0x18,0x3C,0x00,0x18,
0x00,0x00,0x18,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
};

void initgr(void) /* BGI初始化 */
{int gd=DETECT,gm=0; /* 和gd=VGA,gm=VGAHI是同樣效果 */
 registerbgidriver(EGAVGA_driver);/* 注冊BGI驅動后可以不需要.BGI文件的支持運行 */
 initgraph(&gd,&gm,"");
}

void Pause(void)
{

  int c;
  c = getch();              /* Read a character from kbd    */

  if( ESC == c ){           /* Does user wish to leave? */
    closegraph();           /* Change to text mode      */
    exit( 1 );              /* Return to OS         */
  }

  if( 0 == c ){             /* Did use hit a non-ASCII key? */
    c = getch();            /* Read scan code for keyboard  */
  }

  cleardevice();            /* Clear the screen     */

}
void Pause1(void)
{

  int c;

  c = getch();              /* Read a character from kbd    */

  if( ESC == c ){           /* Does user wish to leave? */
    closegraph();           /* Change to text mode      */
    exit( 1 );              /* Return to OS         */
  }
  if( 0 == c ){             /* Did use hit a non-ASCII key? */
    c = getch();            /* Read scan code for keyboard  */
  }

}

/*---------------------------------直線的程序---------------------------------*/


/*-----------------------------數值微分法生成直線-----------------------------*/
void LineDDA1(int x0,int y0,int x1,int y1,int color)
 /*假定x0<x1,直線斜率m<-1*/
 {
   int y;
   float dy,dx,x,m;
   dx=x1-x0;

   dy=y1-y0;
   m=dx/dy;
   x=x0;
   for(y=y0;y>=y1;y--)
   {
     putpixel((int)(x+0.5),y,color);
     x-=m;
   }
 }

 void LineDDA2(int x0,int y0,int x1,int y1,int color)
 /*假定x0<x1,直線斜率-1<=m<=1*/
 {
   int x;
   float dy,dx,y,m;
   dx=x1-x0;
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