青青青伊人色综合久久,久久免费国产精品一区二区,伊人久久大香线蕉综合影院首页

計算機圖形學---Bresenham畫線算法

Bresenham畫線算法。
[初級版]

void ?Bresenham_line(HDC & ?hdc)
?2

{
?3

????? char ?a[ 20 ];
?4

????? double ?dx,dy;
?5

?????dx = abs(B.x - A.x);?dy = abs(B.y - A.y);
?6

????? int ?tx = (B.x - A.x) >= 0 ? ? ? 1 :? - 1 ;
?7

????? int ?ty = (B.y - A.y) >= 0 ? ? ? 1 :? - 1 ;
?8

????? int ?tag = 0 ;
?9

????? if (dx? < ?dy)
10

????? {
11

??????????tag = 1 ;
12

?????????? double ?temp = A.x;? // x1,y1互換
13

??????????A.x = A.y;
14

??????????A.y = temp;
15

??????????temp = B.x;? // x2,y2互換
16

??????????B.x = B.y;
17

??????????B.y = temp;
18

??????????temp = dx;? // dx,dy互換
19

??????????dx = dy;
20

??????????dy = temp;
21

??????????temp = tx;? // tx,ty互換
22

??????????tx = ty;
23

??????????ty = temp;
24

?????}
25

????? int ?curx = A.x;
26

????? int ?cury = A.y;
27

????? if (tag)
28

????? {
29

??????????SetPixel(hdc,cury, 600 - curx,RGB( 0 , 0 , 0 ));
30

??????????sprintf(a, " A(%d,%d) " ,cury,curx);
31

??????????TextOut(hdc,cury, 600 - curx,a,strlen(a));
32

?????}
33

????? else
34

????? {
35

??????????SetPixel(hdc,curx, 600 - cury,RGB( 0 , 0 , 0 ));
36

??????????sprintf(a, " A(%d,%d) " ,curx,cury);
37

??????????TextOut(hdc,curx, 600 - cury,a,strlen(a));
38

?????}
39

????? double ?d = 2 * dy - dx;
40

????? while (cury <= B.y? && ?curx <= B.x)
41

???? {
42

????????? if (d >= 0 )
43

????????? {
44

??????????????d = d + 2 * (dy - dx);
45

??????????????cury += ty;
46

?????????}
47

????????? else
48

??????????????d = d + 2 * dy;
49

??????????????curx += tx;
50

????????? if (tag)
51

??????????????SetPixel(hdc,cury, 600 - curx,RGB( 0 , 0 , 0 ));
52

????????? else
53

??????????????SetPixel(hdc,curx, 600 - cury,RGB( 0 , 0 , 0 ));
54

????}
55

???? if (tag)
56

???? {
57

????????SetPixel(hdc,cury, 600 - curx,RGB( 0 , 0 , 0 ));
58

????????sprintf(a, " B(%d,%d) " ,cury,curx);
59

????????TextOut(hdc,cury, 600 - curx,a,strlen(a));
60

????}
61

???? else
62

???? {
63

????????SetPixel(hdc,curx, 600 - cury,RGB( 0 , 0 , 0 ));
64

????????sprintf(a, " B(%d,%d) " ,curx,cury);
65

????????TextOut(hdc,curx, 600 - cury,a,strlen(a));
66

????}
67

}

posted on 2006-10-07 06:40 TanZek 閱讀(1312) 評論(1) 編輯收藏引用所屬分類: Subject-Study

只有注冊用戶登錄后才能發表評論。
【推薦】100%開源！大型工業跨平臺軟件C++源碼提供，建模，組態！

相關文章: 計算機圖形學---DDA算法計算機圖形學---Bresenham畫線算法操作系統實驗(Operating System Experiment) [轉]《數據庫原理》練習題及答案 [轉]數據庫學習筆記國外大學部分現用教材及教學參考書遞歸模型與遞歸算法的設計排列問題

網站導航: 博客園 IT新聞 BlogJava 博問 Chat2DB 管理

TanZek's 技術空間

常用鏈接

留言簿(2)

文章分類(19)

搜索

最新評論

閱讀排行榜

評論排行榜

評論