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POLYGONS.LST

POLYGONS.LST 10 KB
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  1. Listing:
    2. 

  2. 

  3.     1  (******************************************************************************)
    4. 

  4.     2  (*                              POLYGONS.MOD                                  *)
    5. 

  5.     3  (*                                                                            *)
    6. 

  6.     4  (*    MetaWINDOW HOWTO: program series.  Demonstrates usage of polygons.      *)
    7. 

  7.     5  (* Transcribed from POLYGONS.C METAGRAPHICS SOFTWARE CORPORATION (c) 1987-1989*)
    8. 

  8.     6  (*                                                                            *)
    9. 

  9.     7  (*  PSW 10/31/90 02:44am                                                      *)
    10. 

  10.     8  (******************************************************************************)
    11. 

  11.     9  
    12. 

  12.    10  MODULE Polygons;
    13. 

  13.    11  (*
    14. 

  14.    12   *  Graphix
    15. 

  15.    13   *  Release 3.7
    16. 

  16.    14   *  (c) Copyright 1986-1992 PMI
    17. 

  17.    15   *  Green Bay, Wisconsin
    18. 

  18.    16   *  (414) 468-6040
    19. 

  19.    17   *  All rights reserved
    20. 

  20.    18   *
    21. 

  21.    19   *)
    22. 

  22.    20  
    23. 

  23.    21    IMPORT GrConst;
    24. 

  24.    22    IMPORT GrPorts;
    25. 

  25.    23    IMPORT Meta;
    26. 

  26.    24    IMPORT GrQry;
    27. 

  27.    25    IMPORT IO;
    28. 

  28.    26  
    29. 

  29.    27    FROM GrConst IMPORT rect, point, polyHead;
    30. 

  30. *****         ^ duplicate identifier
    31. 

  31.    28  
    32. 

  32.    29    CONST
    33. 

  33.    30      NUMPTS = 11;          (* how many points in polygon points array *)
    34. 

  34.    31  
    35. 

  35.    32    VAR
    36. 

  36.    33      GrafixCard,
    37. 

  37.    34      CommPort:   INTEGER;
    38. 

  38.    35      scrnR:      rect;
    39. 

  39.    36      i:          INTEGER;
    40. 

  40.    37      c:          CHAR;
    41. 

  41.    38  
    42. 

  42.    39    PROCEDURE DrawPoly();
    43. 

  43.    40      VAR
    44. 

  44.    41        x, y, z: INTEGER;
    45. 

  45.    42        p_pts: ARRAY[0..NUMPTS-1] OF point;   (* The polygon point series *)
    46. 

  46. *****                               ^ not supported yet
    47. 

  47. *****                                     ^ not supported yet
    48. 

  48.    43        p_hdr: ARRAY[0..1] OF polyHead;     (* the polygon header array *)
    49. 

  49. *****                        ^ not supported yet
    50. 

  50. *****                              ^ not supported yet
    51. 

  51.    44    BEGIN
    52. 

  52.    45      x := scrnR.Xmax DIV 15;              (* obtain some scaling factors *)
    53. 

  53. *****           ^ not supported yet
    54. 

  54. *****                 ^ not supported yet
    55. 

  55.    46      y := scrnR.Ymax DIV 12;
    56. 

  56. *****           ^ not supported yet
    57. 

  57. *****                 ^ not supported yet
    58. 

  58.    47  
    59. 

  59.    48  (* set up the first polygon header array - 8 points *)
    60. 

  60.    49      p_hdr[0].polyBgn  := 0;
    61. 

  61. *****      ^ not supported yet
    62. 

  62. *****             ^ not supported yet
    63. 

  63. *****               ^ not supported yet
    64. 

  64.    50      p_hdr[0].polyEnd  := 7;
    65. 

  65. *****      ^ not supported yet
    66. 

  66. *****             ^ not supported yet
    67. 

  67. *****               ^ not supported yet
    68. 

  68.    51      p_hdr[0].polyRect := scrnR;
    69. 

  69. *****      ^ not supported yet
    70. 

  70. *****             ^ not supported yet
    71. 

  71. *****               ^ not supported yet
    72. 

  72. *****                           ^ not supported yet
    73. 

  73.    52  
    74. 

  74.    53  (* set up the second polygon header array - 3 points *)
    75. 

  75.    54      p_hdr[1].polyBgn  := 8;
    76. 

  76. *****      ^ not supported yet
    77. 

  77. *****             ^ not supported yet
    78. 

  78. *****               ^ not supported yet
    79. 

  79.    55      p_hdr[1].polyEnd  := 10;
    80. 

  80. *****      ^ not supported yet
    81. 

  81. *****             ^ not supported yet
    82. 

  82. *****               ^ not supported yet
    83. 

  83.    56      p_hdr[1].polyRect := scrnR;
    84. 

  84. *****      ^ not supported yet
    85. 

  85. *****             ^ not supported yet
    86. 

  86. *****               ^ not supported yet
    87. 

  87. *****                           ^ not supported yet
    88. 

  88.    57  
    89. 

  89.    58  (* set up the polygon point series *)
    90. 

  90.    59       z := 0;
    91. 

  91.    60  
    92. 

  92.    61      p_pts[z].X := x*2;
    93. 

  93. *****      ^ not supported yet
    94. 

  94. *****             ^ not supported yet
    95. 

  95. *****               ^ not supported yet
    96. 

  96.    62      p_pts[z].Y := y*2;
    97. 

  97. *****      ^ not supported yet
    98. 

  98. *****             ^ not supported yet
    99. 

  99. *****               ^ not supported yet
    100. 

  100.    63      INC(z);
    101. 

  101. *****      ^ undeclared identifier
    102. 

  102. *****           ^ not supported yet
    103. 

  103.    64  
    104. 

  104.    65      p_pts[z].X := x*6;
    105. 

  105. *****      ^ not supported yet
    106. 

  106. *****             ^ not supported yet
    107. 

  107. *****               ^ not supported yet
    108. 

  108.    66      p_pts[z].Y := y*5;
    109. 

  109. *****      ^ not supported yet
    110. 

  110. *****             ^ not supported yet
    111. 

  111. *****               ^ not supported yet
    112. 

  112.    67      INC(z);
    113. 

  113. *****      ^ undeclared identifier
    114. 

  114. *****           ^ not supported yet
    115. 

  115.    68  
    116. 

  116.    69      p_pts[z].X := x*12;
    117. 

  117. *****      ^ not supported yet
    118. 

  118. *****             ^ not supported yet
    119. 

  119. *****               ^ not supported yet
    120. 

  120.    70      p_pts[z].Y := y*2;
    121. 

  121. *****      ^ not supported yet
    122. 

  122. *****             ^ not supported yet
    123. 

  123. *****               ^ not supported yet
    124. 

  124.    71      INC(z);
    125. 

  125. *****      ^ undeclared identifier
    126. 

  126. *****           ^ not supported yet
    127. 

  127.    72  
    128. 

  128.    73      p_pts[z].X := x*7;
    129. 

  129. *****      ^ not supported yet
    130. 

  130. *****             ^ not supported yet
    131. 

  131. *****               ^ not supported yet
    132. 

  132.    74      p_pts[z].Y := y*8;
    133. 

  133. *****      ^ not supported yet
    134. 

  134. *****             ^ not supported yet
    135. 

  135. *****               ^ not supported yet
    136. 

  136.    75      INC(z);
    137. 

  137. *****      ^ undeclared identifier
    138. 

  138. *****           ^ not supported yet
    139. 

  139.    76  
    140. 

  140.    77      p_pts[z].X := x*12;
    141. 

  141. *****      ^ not supported yet
    142. 

  142. *****             ^ not supported yet
    143. 

  143. *****               ^ not supported yet
    144. 

  144.    78      p_pts[z].Y := y*10;
    145. 

  145. *****      ^ not supported yet
    146. 

  146. *****             ^ not supported yet
    147. 

  147. *****               ^ not supported yet
    148. 

  148.    79      INC(z);
    149. 

  149. *****      ^ undeclared identifier
    150. 

  150. *****           ^ not supported yet
    151. 

  151.    80  
    152. 

  152.    81      p_pts[z].X := x*8;
    153. 

  153. *****      ^ not supported yet
    154. 

  154. *****             ^ not supported yet
    155. 

  155. *****               ^ not supported yet
    156. 

  156.    82      p_pts[z].Y := y*7;
    157. 

  157. *****      ^ not supported yet
    158. 

  158. *****             ^ not supported yet
    159. 

  159. *****               ^ not supported yet
    160. 

  160.    83      INC(z);
    161. 

  161. *****      ^ undeclared identifier
    162. 

  162. *****           ^ not supported yet
    163. 

  163.    84  
    164. 

  164.    85      p_pts[z].X := x*2;
    165. 

  165. *****      ^ not supported yet
    166. 

  166. *****             ^ not supported yet
    167. 

  167. *****               ^ not supported yet
    168. 

  168.    86      p_pts[z].Y := y*9;
    169. 

  169. *****      ^ not supported yet
    170. 

  170. *****             ^ not supported yet
    171. 

  171. *****               ^ not supported yet
    172. 

  172.    87      INC(z);
    173. 

  173. *****      ^ undeclared identifier
    174. 

  174. *****           ^ not supported yet
    175. 

  175.    88  
    176. 

  176.    89      p_pts[z].X := x*2;
    177. 

  177. *****      ^ not supported yet
    178. 

  178. *****             ^ not supported yet
    179. 

  179. *****               ^ not supported yet
    180. 

  180.    90      p_pts[z].Y := y*2;
    181. 

  181. *****      ^ not supported yet
    182. 

  182. *****             ^ not supported yet
    183. 

  183. *****               ^ not supported yet
    184. 

  184.    91      INC(z);
    185. 

  185. *****      ^ undeclared identifier
    186. 

  186. *****           ^ not supported yet
    187. 

  187.    92  
    188. 

  188.    93      p_pts[z].X := x*15;
    189. 

  189. *****      ^ not supported yet
    190. 

  190. *****             ^ not supported yet
    191. 

  191. *****               ^ not supported yet
    192. 

  192.    94      p_pts[z].Y := y*12;
    193. 

  193. *****      ^ not supported yet
    194. 

  194. *****             ^ not supported yet
    195. 

  195. *****               ^ not supported yet
    196. 

  196.    95      INC(z);
    197. 

  197. *****      ^ undeclared identifier
    198. 

  198. *****           ^ not supported yet
    199. 

  199.    96  
    200. 

  200.    97      p_pts[z].X := x*13;
    201. 

  201. *****      ^ not supported yet
    202. 

  202. *****             ^ not supported yet
    203. 

  203. *****               ^ not supported yet
    204. 

  204.    98      p_pts[z].Y := y*12;
    205. 

  205. *****      ^ not supported yet
    206. 

  206. *****             ^ not supported yet
    207. 

  207. *****               ^ not supported yet
    208. 

  208.    99      INC(z);
    209. 

  209. *****      ^ undeclared identifier
    210. 

  210. *****           ^ not supported yet
    211. 

  211.   100  
    212. 

  212.   101      p_pts[z].X := x*14;
    213. 

  213. *****      ^ not supported yet
    214. 

  214. *****             ^ not supported yet
    215. 

  215. *****               ^ not supported yet
    216. 

  216.   102      p_pts[z].Y := y*10;
    217. 

  217. *****      ^ not supported yet
    218. 

  218. *****             ^ not supported yet
    219. 

  219. *****               ^ not supported yet
    220. 

  220.   103      INC(z);
    221. 

  221. *****      ^ undeclared identifier
    222. 

  222. *****           ^ not supported yet
    223. 

  223.   104  
    224. 

  224.   105      Meta.PaintPoly(2, ADR(p_hdr), ADR(p_pts));     (* draw two polygons with one call *)
    225. 

  225. *****      ^ not supported yet
    226. 

  226. *****           ^ not supported yet
    227. 

  227. *****                        ^ undeclared identifier
    228. 

  228. *****                            ^ not supported yet
    229. 

  229. *****                                    ^ undeclared identifier
    230. 

  230. *****                                        ^ not supported yet
    231. 

  231.   106      c := IO.RdChar();
    232. 

  232. *****           ^ not supported yet
    233. 

  233. *****              ^ not supported yet
    234. 

  234. *****                     ^ not supported yet
    235. 

  235.   107  
    236. 

  236.   108      Meta.ErasePoly(2,ADR(p_hdr),ADR(p_pts));
    237. 

  237. *****      ^ not supported yet
    238. 

  238. *****           ^ not supported yet
    239. 

  239. *****                       ^ undeclared identifier
    240. 

  240. *****                           ^ not supported yet
    241. 

  241. *****                                  ^ undeclared identifier
    242. 

  242. *****                                      ^ not supported yet
    243. 

  243.   109      c := IO.RdChar();
    244. 

  244. *****           ^ not supported yet
    245. 

  245. *****              ^ not supported yet
    246. 

  246. *****                     ^ not supported yet
    247. 

  247.   110  
    248. 

  248.   111      Meta.FillPoly(2,ADR(p_hdr),ADR(p_pts),3);
    249. 

  249. *****      ^ not supported yet
    250. 

  250. *****           ^ not supported yet
    251. 

  251. *****                      ^ undeclared identifier
    252. 

  252. *****                          ^ not supported yet
    253. 

  253. *****                                 ^ undeclared identifier
    254. 

  254. *****                                     ^ not supported yet
    255. 

  255. *****                                             ^ not supported yet
    256. 

  256.   112      c := IO.RdChar();
    257. 

  257. *****           ^ not supported yet
    258. 

  258. *****              ^ not supported yet
    259. 

  259. *****                     ^ not supported yet
    260. 

  260.   113    END DrawPoly;
    261. 

  261. *****        ^ not supported yet
    262. 

  262.   114  
    263. 

  263.   115  
    264. 

  264.   116  BEGIN
    265. 

  265.   117    (* init the system *)
    266. 

  266.   118  
    267. 

  267.   119    GrQry.GrQuery(GrafixCard, CommPort);
    268. 

  268. *****    ^ not supported yet
    269. 

  269. *****          ^ not supported yet
    270. 

  270. *****                                      ^ not supported yet
    271. 

  271.   120  
    272. 

  272.   121    i := Meta.InitGrafix(-GrafixCard);
    273. 

  273. *****         ^ not supported yet
    274. 

  274. *****              ^ not supported yet
    275. 

  275. *****                                    ^ not supported yet
    276. 

  276.   122  
    277. 

  277.   123    IF (i # 0) THEN
    278. 

  278.   124      (* Display reason for no go *)
    279. 

  279.   125      GrQry.GrInitErr(GrafixCard, CommPort, i);
    280. 

  280. *****      ^ not supported yet
    281. 

  281. *****            ^ not supported yet
    282. 

  282. *****                                             ^ not supported yet
    283. 

  283.   126    END;
    284. 

  284.   127  
    285. 

  285.   128    Meta.SetDisplay(GrConst.GrafPg0);
    286. 

  286. *****    ^ not supported yet
    287. 

  287. *****         ^ not supported yet
    288. 

  288. *****                    ^ not supported yet
    289. 

  289. *****                            ^ not supported yet
    290. 

  290.   129    Meta.ScreenRect(scrnR);
    291. 

  291. *****    ^ not supported yet
    292. 

  292. *****         ^ not supported yet
    293. 

  293. *****                    ^ not supported yet
    294. 

  294.   130    Meta.EraseRect(scrnR);
    295. 

  295. *****    ^ not supported yet
    296. 

  296. *****         ^ not supported yet
    297. 

  297. *****                   ^ not supported yet
    298. 

  298.   131    DrawPoly();
    299. 

  299. *****    ^ not supported yet
    300. 

  300. *****             ^ not supported yet
    301. 

  301.   132  
    302. 

  302.   133    GrQry.GrQuit('', 0)
    303. 

  303. *****    ^ not supported yet
    304. 

  304. *****          ^ not supported yet
    305. 

  305. *****                      ^ not supported yet
    306. 

  306.   134  END Polygons.
    307. 

  307. 

  308.   170 errors
    309. 

  309. 

  310.