Sine wave demo

1 files changed, 18 insertions, 5 deletions

diff --git a/main.c b/main.c
index bb2ea1f..4327db5 100644
--- a/main.c
+++ b/main.c
@@ -10,14 +10,27 @@ int main(void) {
 
     Framebuffer fb = fb_new(term_width, term_height);
     fb_fill(fb, P_RED);
-    for (int i = 0; i < 10; i ++) {
-        fb.fb[i][i] = P_CYAN;
+
+    char c;
+    const float k_x = 0.1;
+    const float k_t = 0.1;
+    size_t t = 0;
+    while(1) {
+        fb_fill(fb, P_RED);
+
+        /* Sine wave */
+        for (size_t x = 0; x < term_width; x++) {
+            size_t y = ((sin(k_x * x + k_t * t) + 1.0) / 2 * term_height / 2) + (size_t)(term_height / 4);
+            fb.fb[y][x] = P_CYAN;
+        }
+
         fb_print(fb);
-        usleep(1000000);
+
+        if (get_input(c) != 0 && c == 'q') { break; };
+
+        t++;
     }
 
-    char c;
-    get_input(c);
 
     term_cleanup();
 }