cacalabs
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libcaca
spogulis no https://github.com/cacalabs/libcaca.git
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libcaca/test/demo.c

571 rinda
16 KiB
Neapstrādāts Vainot Vēsture 

  1. /*

  2.  *  demo          demo for libcaca

  3.  *  Copyright (c) 2003 Sam Hocevar <sam@zoy.org>

  4.  *                All Rights Reserved

  5.  *

  6.  *  $Id$

  7.  *

  8.  *  This program is free software; you can redistribute it and/or

  9.  *  modify it under the terms of the Do What The Fuck You Want To

  10.  *  Public License, Version 2, as published by Sam Hocevar. See

  11.  *  http://sam.zoy.org/wtfpl/COPYING for more details.

  12.  */

  13. 

  14. #include "config.h"

  15. 

  16. #include <math.h>

  17. #include <string.h>

  18. #include <stdio.h>

  19. 

  20. #include "caca.h"

  21. 

  22. static void display_menu(void);

  23. 

  24. static void demo_all(void);

  25. 

  26. static void demo_color(void);

  27. static void demo_dots(void);

  28. static void demo_lines(void);

  29. static void demo_boxes(void);

  30. static void demo_ellipses(void);

  31. static void demo_triangles(void);

  32. static void demo_sprites(void);

  33. static void demo_render(void);

  34. 

  35. int bounds = 0;

  36. int outline = 0;

  37. int dithering = 0;

  38. struct cucul_sprite *sprite = NULL;

  39. 

  40. cucul_t *qq;

  41. caca_t *kk;

  42. 

  43. int main(int argc, char **argv)

  44. {

  45.     void (*demo)(void) = NULL;

  46.     int quit = 0;

  47. 

  48.     qq = cucul_create(0, 0);

  49.     if(!qq)

  50.         return 1;

  51.     kk = caca_attach(qq);

  52.     if(!kk)

  53.         return 1;

  54. 

  55.     caca_set_delay(kk, 40000);

  56. 

  57.     /* Initialize data */

  58.     sprite = cucul_load_sprite(qq, DATADIR "/caca.txt");

  59.     if(!sprite)

  60.         sprite = cucul_load_sprite(qq, "caca.txt");

  61.     if(!sprite)

  62.         sprite = cucul_load_sprite(qq, "examples/caca.txt");

  63. 

  64.     /* Disable cursor */

  65.     caca_set_mouse(kk, 0);

  66. 

  67.     /* Main menu */

  68.     display_menu();

  69.     caca_display(kk);

  70. 

  71.     /* Go ! */

  72.     while(!quit)

  73.     {

  74.         struct caca_event ev;

  75.         int menu = 0, mouse = 0, xmouse = 0, ymouse = 0;

  76. 

  77.         while(caca_get_event(kk, CACA_EVENT_ANY, &ev))

  78.         {

  79.             if(demo && (ev.type & CACA_EVENT_KEY_PRESS))

  80.             {

  81.                 menu = 1;

  82.                 demo = NULL;

  83.             }

  84.             else if(ev.type & CACA_EVENT_KEY_PRESS)

  85.             {

  86.                 switch(ev.data.key.c)

  87.                 {

  88.                 case 'q':

  89.                 case 'Q':

  90.                     demo = NULL;

  91.                     quit = 1;

  92.                     break;

  93.                 case 'o':

  94.                 case 'O':

  95.                     outline = (outline + 1) % 3;

  96.                     display_menu();

  97.                     break;

  98.                 case 'b':

  99.                 case 'B':

  100.                     bounds = (bounds + 1) % 2;

  101.                     display_menu();

  102.                     break;

  103.                 case 'd':

  104.                 case 'D':

  105.                     dithering = (dithering + 1) % 5;

  106.                     cucul_set_feature(qq, dithering);

  107.                     display_menu();

  108.                     break;

  109.                 case 'c':

  110.                     demo = demo_color;

  111.                     break;

  112.                 case 'f':

  113.                 case 'F':

  114.                     demo = demo_all;

  115.                     break;

  116.                 case '1':

  117.                     demo = demo_dots;

  118.                     break;

  119.                 case '2':

  120.                     demo = demo_lines;

  121.                     break;

  122.                 case '3':

  123.                     demo = demo_boxes;

  124.                     break;

  125.                 case '4':

  126.                     demo = demo_triangles;

  127.                     break;

  128.                 case '5':

  129.                     demo = demo_ellipses;

  130.                     break;

  131.                 case 's':

  132.                 case 'S':

  133.                     if(sprite)

  134.                         demo = demo_sprites;

  135.                     break;

  136.                 case 'r':

  137.                 case 'R':

  138.                     demo = demo_render;

  139.                     break;

  140.                 }

  141. 

  142.                 if(demo)

  143.                     cucul_clear(qq);

  144.             }

  145.             else if(ev.type & CACA_EVENT_MOUSE_MOTION)

  146.             {

  147.                 mouse = 1;

  148.                 xmouse = ev.data.mouse.x;

  149.                 ymouse = ev.data.mouse.y;

  150.             }

  151.         }

  152. 

  153.         if(menu || (mouse && !demo))

  154.         {

  155.             display_menu();

  156.             if(mouse && !demo)

  157.             {

  158.                 cucul_set_color(qq, CUCUL_COLOR_RED, CUCUL_COLOR_BLACK);

  159.                 cucul_putstr(qq, xmouse, ymouse, "|\\");

  160.             }

  161.             caca_display(kk);

  162.             mouse = menu = 0;

  163.         }

  164. 

  165.         if(demo)

  166.         {

  167.             demo();

  168. 

  169.             cucul_set_color(qq, CUCUL_COLOR_LIGHTGRAY, CUCUL_COLOR_BLACK);

  170.             cucul_draw_thin_box(qq, 1, 1, cucul_get_width(qq) - 2, cucul_get_height(qq) - 2);

  171.             cucul_printf(qq, 4, 1, "[%i.%i fps]----",

  172.                          1000000 / caca_get_rendertime(kk),

  173.                          (10000000 / caca_get_rendertime(kk)) % 10);

  174.             caca_display(kk);

  175.         }

  176.     }

  177. 

  178.     /* Clean up */

  179.     cucul_free_sprite(sprite);

  180.     caca_detach(kk);

  181.     cucul_free(qq);

  182. 

  183.     return 0;

  184. }

  185. 

  186. static void display_menu(void)

  187. {

  188.     int xo = cucul_get_width(qq) - 2;

  189.     int yo = cucul_get_height(qq) - 2;

  190. 

  191.     cucul_clear(qq);

  192.     cucul_set_color(qq, CUCUL_COLOR_LIGHTGRAY, CUCUL_COLOR_BLACK);

  193.     cucul_draw_thin_box(qq, 1, 1, xo, yo);

  194. 

  195.     cucul_putstr(qq, (xo - strlen("libcaca demo")) / 2, 3, "libcaca demo");

  196.     cucul_putstr(qq, (xo - strlen("==============")) / 2, 4, "==============");

  197. 

  198.     cucul_putstr(qq, 4, 6, "demos:");

  199.     cucul_putstr(qq, 4, 7, "'f': full");

  200.     cucul_putstr(qq, 4, 8, "'1': dots");

  201.     cucul_putstr(qq, 4, 9, "'2': lines");

  202.     cucul_putstr(qq, 4, 10, "'3': boxes");

  203.     cucul_putstr(qq, 4, 11, "'4': triangles");

  204.     cucul_putstr(qq, 4, 12, "'5': ellipses");

  205.     cucul_putstr(qq, 4, 13, "'c': colour");

  206.     cucul_putstr(qq, 4, 14, "'r': render");

  207.     if(sprite)

  208.         cucul_putstr(qq, 4, 15, "'s': sprites");

  209. 

  210.     cucul_putstr(qq, 4, 16, "settings:");

  211.     cucul_printf(qq, 4, 17, "'o': outline: %s",

  212.                  outline == 0 ? "none" : outline == 1 ? "solid" : "thin");

  213.     cucul_printf(qq, 4, 18, "'b': drawing boundaries: %s",

  214.                  bounds == 0 ? "screen" : "infinite");

  215.     cucul_printf(qq, 4, 19, "'d': dithering (%s)",

  216.                  cucul_get_feature_name(dithering));

  217. 

  218.     cucul_putstr(qq, 4, yo - 2, "'q': quit");

  219. 

  220.     caca_display(kk);

  221. }

  222. 

  223. static void demo_all(void)

  224. {

  225.     static int i = 0;

  226. 

  227.     int j, xo, yo, xa, ya, xb, yb, xc, yc;

  228. 

  229.     i++;

  230. 

  231.     cucul_clear(qq);

  232. 

  233.     /* Draw the sun */

  234.     cucul_set_color(qq, CUCUL_COLOR_YELLOW, CUCUL_COLOR_BLACK);

  235.     xo = cucul_get_width(qq) / 4;

  236.     yo = cucul_get_height(qq) / 4 + 5 * sin(0.03*i);

  237. 

  238.     for(j = 0; j < 16; j++)

  239.     {

  240.         xa = xo - (30 + sin(0.03*i) * 8) * sin(0.03*i + M_PI*j/8);

  241.         ya = yo + (15 + sin(0.03*i) * 4) * cos(0.03*i + M_PI*j/8);

  242.         cucul_draw_thin_line(qq, xo, yo, xa, ya);

  243.     }

  244. 

  245.     j = 15 + sin(0.03*i) * 8;

  246.     cucul_set_color(qq, CUCUL_COLOR_WHITE, CUCUL_COLOR_BLACK);

  247.     cucul_fill_ellipse(qq, xo, yo, j, j / 2, "#");

  248.     cucul_set_color(qq, CUCUL_COLOR_YELLOW, CUCUL_COLOR_BLACK);

  249.     cucul_draw_ellipse(qq, xo, yo, j, j / 2, "#");

  250. 

  251.     /* Draw the pyramid */

  252.     xo = cucul_get_width(qq) * 5 / 8;

  253.     yo = 2;

  254. 

  255.     xa = cucul_get_width(qq) / 8 + sin(0.03*i) * 5;

  256.     ya = cucul_get_height(qq) / 2 + cos(0.03*i) * 5;

  257. 

  258.     xb = cucul_get_width(qq) - 10 - cos(0.02*i) * 10;

  259.     yb = cucul_get_height(qq) * 3 / 4 - 5 + sin(0.02*i) * 5;

  260. 

  261.     xc = cucul_get_width(qq) / 4 - sin(0.02*i) * 5;

  262.     yc = cucul_get_height(qq) * 3 / 4 + cos(0.02*i) * 5;

  263. 

  264.     cucul_set_color(qq, CUCUL_COLOR_GREEN, CUCUL_COLOR_BLACK);

  265.     cucul_fill_triangle(qq, xo, yo, xb, yb, xa, ya, "%");

  266.     cucul_set_color(qq, CUCUL_COLOR_YELLOW, CUCUL_COLOR_BLACK);

  267.     cucul_draw_thin_triangle(qq, xo, yo, xb, yb, xa, ya);

  268. 

  269.     cucul_set_color(qq, CUCUL_COLOR_RED, CUCUL_COLOR_BLACK);

  270.     cucul_fill_triangle(qq, xa, ya, xb, yb, xc, yc, "#");

  271.     cucul_set_color(qq, CUCUL_COLOR_YELLOW, CUCUL_COLOR_BLACK);

  272.     cucul_draw_thin_triangle(qq, xa, ya, xb, yb, xc, yc);

  273. 

  274.     cucul_set_color(qq, CUCUL_COLOR_BLUE, CUCUL_COLOR_BLACK);

  275.     cucul_fill_triangle(qq, xo, yo, xb, yb, xc, yc, "%");

  276.     cucul_set_color(qq, CUCUL_COLOR_YELLOW, CUCUL_COLOR_BLACK);

  277.     cucul_draw_thin_triangle(qq, xo, yo, xb, yb, xc, yc);

  278. 

  279.     /* Draw a background triangle */

  280.     xa = 2;

  281.     ya = 2;

  282. 

  283.     xb = cucul_get_width(qq) - 3;

  284.     yb = cucul_get_height(qq) / 2;

  285. 

  286.     xc = cucul_get_width(qq) / 3;

  287.     yc = cucul_get_height(qq) - 3;

  288. 

  289.     cucul_set_color(qq, CUCUL_COLOR_CYAN, CUCUL_COLOR_BLACK);

  290.     cucul_draw_thin_triangle(qq, xa, ya, xb, yb, xc, yc);

  291. 

  292.     xo = cucul_get_width(qq) / 2 + cos(0.027*i) * cucul_get_width(qq) / 3;

  293.     yo = cucul_get_height(qq) / 2 - sin(0.027*i) * cucul_get_height(qq) / 2;

  294. 

  295.     cucul_draw_thin_line(qq, xa, ya, xo, yo);

  296.     cucul_draw_thin_line(qq, xb, yb, xo, yo);

  297.     cucul_draw_thin_line(qq, xc, yc, xo, yo);

  298. 

  299.     /* Draw a sprite on the pyramid */

  300.     cucul_draw_sprite(qq, xo, yo, sprite, 0);

  301. 

  302.     /* Draw a trail behind the foreground sprite */

  303.     for(j = i - 60; j < i; j++)

  304.     {

  305.         int delta = cucul_rand(-5, 5);

  306.         cucul_set_color(qq, cucul_rand(0, 15), cucul_rand(0, 15));

  307.         cucul_putchar(qq, cucul_get_width(qq) / 2

  308.                     + cos(0.02*j) * (delta + cucul_get_width(qq) / 4),

  309.                    cucul_get_height(qq) / 2

  310.                     + sin(0.02*j) * (delta + cucul_get_height(qq) / 3),

  311.                    '#');

  312.     }

  313. 

  314.     /* Draw foreground sprite */

  315.     cucul_draw_sprite(qq, cucul_get_width(qq) / 2 + cos(0.02*i) * cucul_get_width(qq) / 4,

  316.                    cucul_get_height(qq) / 2 + sin(0.02*i) * cucul_get_height(qq) / 3,

  317.                    sprite, 0);

  318. }

  319. 

  320. static void demo_dots(void)

  321. {

  322.     int xmax = cucul_get_width(qq) - 1;

  323.     int ymax = cucul_get_height(qq) - 1;

  324.     int i;

  325.     static char chars[10] =

  326.     {

  327.         '+', '-', '*', '#', 'X', '@', '%', '$', 'M', 'W'

  328.     };

  329. 

  330.     for(i = 1000; i--;)

  331.     {

  332.         /* Putpixel */

  333.         cucul_set_color(qq, cucul_rand(0, 15), cucul_rand(0, 15));

  334.         cucul_putchar(qq, cucul_rand(0, xmax), cucul_rand(0, ymax),

  335.                       chars[cucul_rand(0, 9)]);

  336.     }

  337. }

  338. 

  339. static void demo_color(void)

  340. {

  341.     int i, j;

  342.     char buf[BUFSIZ];

  343. 

  344.     cucul_clear(qq);

  345.     for(i = 0; i < 16; i++)

  346.     {

  347.         sprintf(buf, "'%c': %i (%s)", 'a' + i, i, cucul_get_color_name(i));

  348.         cucul_set_color(qq, CUCUL_COLOR_LIGHTGRAY, CUCUL_COLOR_BLACK);

  349.         cucul_putstr(qq, 4, i + (i >= 8 ? 4 : 3), buf);

  350.         for(j = 0; j < 16; j++)

  351.         {

  352.             cucul_set_color(qq, i, j);

  353.             cucul_putstr(qq, (j >= 8 ? 41 : 40) + j * 2, i + (i >= 8 ? 4 : 3), "# ");

  354.         }

  355.     }

  356. }

  357. 

  358. static void demo_lines(void)

  359. {

  360.     int w = cucul_get_width(qq);

  361.     int h = cucul_get_height(qq);

  362.     int xa, ya, xb, yb;

  363. 

  364.     if(bounds)

  365.     {

  366.         xa = cucul_rand(- w, 2 * w); ya = cucul_rand(- h, 2 * h);

  367.         xb = cucul_rand(- w, 2 * w); yb = cucul_rand(- h, 2 * h);

  368.     }

  369.     else

  370.     {

  371.         xa = cucul_rand(0, w - 1); ya = cucul_rand(0, h - 1);

  372.         xb = cucul_rand(0, w - 1); yb = cucul_rand(0, h - 1);

  373.     }

  374. 

  375.     cucul_set_color(qq, cucul_rand(0, 15), CUCUL_COLOR_BLACK);

  376.     if(outline > 1)

  377.         cucul_draw_thin_line(qq, xa, ya, xb, yb);

  378.     else

  379.         cucul_draw_line(qq, xa, ya, xb, yb, "#");

  380. }

  381. 

  382. static void demo_boxes(void)

  383. {

  384.     int w = cucul_get_width(qq);

  385.     int h = cucul_get_height(qq);

  386.     int xa, ya, xb, yb;

  387. 

  388.     if(bounds)

  389.     {

  390.         xa = cucul_rand(- w, 2 * w); ya = cucul_rand(- h, 2 * h);

  391.         xb = cucul_rand(- w, 2 * w); yb = cucul_rand(- h, 2 * h);

  392.     }

  393.     else

  394.     {

  395.         xa = cucul_rand(0, w - 1); ya = cucul_rand(0, h - 1);

  396.         xb = cucul_rand(0, w - 1); yb = cucul_rand(0, h - 1);

  397.     }

  398. 

  399.     cucul_set_color(qq, cucul_rand(0, 15), cucul_rand(0, 15));

  400.     cucul_fill_box(qq, xa, ya, xb, yb, "#");

  401. 

  402.     cucul_set_color(qq, cucul_rand(0, 15), CUCUL_COLOR_BLACK);

  403.     if(outline == 2)

  404.         cucul_draw_thin_box(qq, xa, ya, xb, yb);

  405.     else if(outline == 1)

  406.         cucul_draw_box(qq, xa, ya, xb, yb, "#");

  407. }

  408. 

  409. static void demo_ellipses(void)

  410. {

  411.     int w = cucul_get_width(qq);

  412.     int h = cucul_get_height(qq);

  413.     int x, y, a, b;

  414. 

  415.     if(bounds)

  416.     {

  417.         x = cucul_rand(- w, 2 * w); y = cucul_rand(- h, 2 * h);

  418.         a = cucul_rand(0, w); b = cucul_rand(0, h);

  419.     }

  420.     else

  421.     {

  422.         do

  423.         {

  424.             x = cucul_rand(0, w); y = cucul_rand(0, h);

  425.             a = cucul_rand(0, w); b = cucul_rand(0, h);

  426. 

  427.         } while(x - a < 0 || x + a >= w || y - b < 0 || y + b >= h);

  428.     }

  429. 

  430.     cucul_set_color(qq, cucul_rand(0, 15), cucul_rand(0, 15));

  431.     cucul_fill_ellipse(qq, x, y, a, b, "#");

  432. 

  433.     cucul_set_color(qq, cucul_rand(0, 15), CUCUL_COLOR_BLACK);

  434.     if(outline == 2)

  435.         cucul_draw_thin_ellipse(qq, x, y, a, b);

  436.     else if(outline == 1)

  437.         cucul_draw_ellipse(qq, x, y, a, b, "#");

  438. }

  439. 

  440. static void demo_triangles(void)

  441. {

  442.     int w = cucul_get_width(qq);

  443.     int h = cucul_get_height(qq);

  444.     int xa, ya, xb, yb, xc, yc;

  445. 

  446.     if(bounds)

  447.     {

  448.         xa = cucul_rand(- w, 2 * w); ya = cucul_rand(- h, 2 * h);

  449.         xb = cucul_rand(- w, 2 * w); yb = cucul_rand(- h, 2 * h);

  450.         xc = cucul_rand(- w, 2 * w); yc = cucul_rand(- h, 2 * h);

  451.     }

  452.     else

  453.     {

  454. 

  455.         xa = cucul_rand(0, w - 1); ya = cucul_rand(0, h - 1);

  456.         xb = cucul_rand(0, w - 1); yb = cucul_rand(0, h - 1);

  457.         xc = cucul_rand(0, w - 1); yc = cucul_rand(0, h - 1);

  458.     }

  459. 

  460.     cucul_set_color(qq, cucul_rand(0, 15), cucul_rand(0, 15));

  461.     cucul_fill_triangle(qq, xa, ya, xb, yb, xc, yc, "#");

  462. 

  463.     cucul_set_color(qq, cucul_rand(0, 15), CUCUL_COLOR_BLACK);

  464.     if(outline == 2)

  465.         cucul_draw_thin_triangle(qq, xa, ya, xb, yb, xc, yc);

  466.     else if(outline == 1)

  467.         cucul_draw_triangle(qq, xa, ya, xb, yb, xc, yc, "#");

  468. }

  469. 

  470. static void demo_sprites(void)

  471. {

  472.     cucul_draw_sprite(qq, cucul_rand(0, cucul_get_width(qq) - 1),

  473.                    cucul_rand(0, cucul_get_height(qq) - 1), sprite, 0);

  474. }

  475. 

  476. #if 0

  477. static void demo_render(void)

  478. {

  479.     struct cucul_bitmap *bitmap;

  480.     //short buffer[256*256];

  481.     //short *dest = buffer;

  482.     int buffer[256*256];

  483.     int *dest = buffer;

  484.     int x, y, z;

  485.     static int i = 0;

  486. 

  487.     i = (i + 1) % 512;

  488.     z = i < 256 ? i : 511 - i;

  489. 

  490.     for(x = 0; x < 256; x++)

  491.         for(y = 0; y < 256; y++)

  492.     {

  493.         //*dest++ = ((x >> 3) << 11) | ((y >> 2) << 5) | ((z >> 3));

  494.         *dest++ = (x << 16) | (y << 8) | (z);

  495.     }

  496.     cucul_set_bitmap_invert(bitmap, 1);

  497.     //bitmap = cucul_create_bitmap(16, 256, 256, 2 * 256, 0xf800, 0x07e0, 0x001f, 0x0000);

  498.     bitmap = cucul_create_bitmap(32, 256, 256, 4 * 256, 0x00ff0000, 0x0000ff00, 0x000000ff, 0xff000000);

  499.     cucul_draw_bitmap(qq, 0, 0, cucul_get_width(qq) - 1, cucul_get_height(qq) - 1,

  500.                      bitmap, buffer);

  501.     cucul_free_bitmap(bitmap);

  502. }

  503. #endif

  504. 

  505. static void draw_circle(int *buffer, int xo, int yo, int r, int mask, int val);

  506. 

  507. static void demo_render(void)

  508. {

  509.     struct cucul_bitmap *bitmap;

  510.     int buffer[256*256];

  511.     int *dest;

  512.     int x, y, z, xo, yo;

  513.     static int i = 0;

  514. 

  515.     i++;

  516. 

  517.     dest = buffer;

  518.     for(x = 0; x < 256; x++)

  519.         for(y = 0; y < 256; y++)

  520.     {

  521.         *dest++ = 0xff000000;

  522.     }

  523. 

  524.     /* red */

  525.     xo = 128 + 48 * sin(0.02 * i);

  526.     yo = 128 + 48 * cos(0.03 * i);

  527.     for(z = 0; z < 240; z++)

  528.         draw_circle(buffer, xo, yo, z, 0x00ff0000, 200 << 16);

  529. 

  530.     /* green */

  531.     xo = 128 + 48 * sin(2 + 0.06 * i);

  532.     yo = 128 + 48 * cos(2 + 0.05 * i);

  533.     for(z = 0; z < 240; z++)

  534.         draw_circle(buffer, xo, yo, z, 0x0000ff00, 200 << 8);

  535. 

  536.     /* blue */

  537.     xo = 128 + 48 * sin(1 + 0.04 * i);

  538.     yo = 128 + 48 * cos(1 + 0.03 * i);

  539.     for(z = 0; z < 240; z++)

  540.         draw_circle(buffer, xo, yo, z, 0x000000ff, 200);

  541. 

  542.     bitmap = cucul_create_bitmap(32, 256, 256, 4 * 256, 0x00ff0000, 0x0000ff00, 0x000000ff, 0xff000000);

  543.  cucul_set_bitmap_invert(bitmap, 1);

  544.     cucul_draw_bitmap(qq, 0, 0, cucul_get_width(qq) - 1, cucul_get_height(qq) - 1, bitmap, (char *)buffer);

  545.     cucul_free_bitmap(bitmap);

  546. }

  547. 

  548. static void draw_circle(int *buffer, int x, int y, int r, int mask, int val)

  549. {

  550.     int t, dx, dy;

  551. 

  552. #define POINT(X,Y) \

  553.     buffer[(X) + 256 * (Y)] = 0xff000000 | (buffer[(X) + 256 * (Y)] & ~mask) | val;

  554. 

  555.     for(t = 0, dx = 0, dy = r; dx <= dy; dx++)

  556.     {

  557.         POINT(x - dx / 3, y - dy / 3);

  558.         POINT(x + dx / 3, y - dy / 3);

  559.         POINT(x - dx / 3, y + dy / 3);

  560.         POINT(x + dx / 3, y + dy / 3);

  561. 

  562.         POINT(x - dy / 3, y - dx / 3);

  563.         POINT(x + dy / 3, y - dx / 3);

  564.         POINT(x - dy / 3, y + dx / 3);

  565.         POINT(x + dy / 3, y + dx / 3);

  566. 

  567.         t += t > 0 ? dx - dy-- : dx;

  568.     }

  569. }