* test/demo.c:

+ Putpixel demo.
    + Draw line demo.
    + Draw circle demo.
    + Animated radar demo.


git-svn-id: file:///srv/caca.zoy.org/var/lib/svn/ttyvaders/trunk@100 92316355-f0b4-4df1-b90c-862c8a59935f

test/demo.c

@@ -20,10 +20,23 @@
  *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  */
 
+#include <math.h>
+#include <string.h>
+
 #include "ee.h"
 
+static void display_menu(void);
+
+static void demo_dots(void);
+static void demo_lines(void);
+static void demo_circles(void);
+static void demo_radar(void);
+
+int clipping = 0;
+
 int main(int argc, char **argv)
 {
+    void (*demo)(void) = NULL;
     int quit = 0;
 
     if(ee_init())
@@ -31,26 +44,46 @@ int main(int argc, char **argv)
         return 1;
     }
 
+    display_menu();
+
     /* Go ! */
     while(!quit)
     {
-        int i;
         char key = ee_get_key();
-        if(key)
+        if(key && demo)
         {
-            quit = 1;
+            display_menu();
+            demo = NULL;
         }
-
-        ee_clear();
-        for(i=1000; i--;)
+        else if(key)
         {
-            ee_goto(ee_rand(0,ee_get_width()-1),
-                    ee_rand(0,ee_get_height()-1));
-            ee_color(ee_rand(1,10));
-            ee_putchar('#');
+            switch(key)
+            {
+            case 'q':
+                demo = NULL;
+                quit = 1;
+                break;
+            case '1':
+                ee_clear();
+                demo = demo_dots;
+                break;
+            case '2':
+                ee_clear();
+                demo = demo_lines;
+                break;
+            case '3':
+                ee_clear();
+                demo = demo_circles;
+                break;
+            case '4':
+                ee_clear();
+                demo = demo_radar;
+                break;
+            }
         }
 
-        ee_refresh();
+        if(demo)
+            demo();
     }
 
     /* Clean up */
@@ -59,3 +92,126 @@ int main(int argc, char **argv)
     return 0;
 }
 
+static void display_menu(void)
+{
+    int xo = ee_get_width() - 2;
+    int yo = ee_get_height() - 2;
+
+    ee_clear();
+    ee_color(EE_WHITE);
+    ee_draw_line(xo, yo, 1, yo, '.');
+    ee_draw_line(1, yo, 1, 1, ':');
+    ee_draw_line(xo, 1, xo, yo, ':');
+    ee_draw_line(1, 1, xo, 1, '.');
+
+    ee_goto((xo - strlen("libee demo")) / 2, 3);
+    ee_putstr("libee demo");
+    ee_goto((xo - strlen("============")) / 2, 4);
+    ee_putstr("============");
+
+    ee_goto(4, 6);
+    ee_putstr("1: dots demo");
+    ee_goto(4, 7);
+    ee_putstr("2: lines demo");
+    ee_goto(4, 8);
+    ee_putstr("3: circles demo");
+    ee_goto(4, 9);
+    ee_putstr("4: radar demo");
+
+    ee_goto(4, yo - 2);
+    ee_putstr("q: quit");
+
+    ee_refresh();
+}
+
+static void demo_dots(void)
+{
+    int i;
+
+    for(i=1000; i--;)
+    {
+        /* Putpixel */
+        ee_color(ee_rand(1, 10));
+        ee_goto(ee_rand(0, ee_get_width() - 1),
+                ee_rand(0, ee_get_height() - 1));
+        ee_putchar('#');
+    }
+    ee_refresh();
+}
+
+static void demo_lines(void)
+{
+    /* Draw lines */
+    ee_color(ee_rand(1, 10));
+    if(clipping)
+    {
+        ee_draw_line(ee_rand(- ee_get_width(), 2 * ee_get_width()),
+                     ee_rand(- ee_get_height(), 2 * ee_get_height()),
+                     ee_rand(- ee_get_width(), 2 * ee_get_width()),
+                     ee_rand(- ee_get_height(), 2 * ee_get_height()),
+                     '#');
+    }
+    else
+    {
+        ee_draw_line(ee_rand(0, ee_get_width()),
+                     ee_rand(0, ee_get_height()),
+                     ee_rand(0, ee_get_width()),
+                     ee_rand(0, ee_get_height()),
+                     '*');
+    }
+    ee_refresh();
+}
+
+static void demo_circles(void)
+{
+    /* Draw circles */
+    if(clipping)
+    {
+        ee_color(ee_rand(1, 10));
+        ee_draw_circle(ee_rand(- ee_get_width(), 2 * ee_get_width()),
+                       ee_rand(- ee_get_height(), 2 * ee_get_height()),
+                       ee_rand(0, ee_get_width() + ee_get_height()) / 2,
+                       '#');
+    }
+    else
+    {
+        int x = ee_rand(0, ee_get_width());
+        int y = ee_rand(0, ee_get_height());
+        int r = ee_rand(0, (ee_get_width() + ee_get_height()) / 2);
+
+        if(x - r < 0 || x + r >= ee_get_width() ||
+           y - r < 0 || y + r >= ee_get_height())
+        {
+            demo_circles();
+            return;
+        }
+
+        ee_color(ee_rand(1, 10));
+        ee_draw_circle(x, y, r, '*');
+    }
+
+    ee_refresh();
+}
+
+static void demo_radar(void)
+{
+    static int i = 0;
+
+    int xo = ee_get_width() / 2;
+    int yo = ee_get_height() / 2;
+    int l = ee_get_height() + ee_get_width();
+
+    i++;
+
+    ee_color(EE_BLUE);
+    ee_draw_line(xo,yo,xo+(sin(0.03*(i-30))*l*2),yo+(cos(0.03*(i-30))*l),'.');
+    ee_color(EE_CYAN);
+    ee_draw_line(xo,yo,xo+(sin(0.03*(i-2))*l*2),yo+(cos(0.03*(i-2))*l),':');
+    ee_color(EE_WHITE);
+    ee_draw_line(xo,yo,xo+(sin(0.03*(i-1))*l*2),yo+(cos(0.03*(i-1))*l),':');
+    ee_color(EE_WHITE);
+    ee_draw_line(xo,yo,xo+(sin(0.03*i)*l*2),yo+(cos(0.03*i)*l),'#');
+
+    ee_refresh();
+}
+