snake

commit c3c303252699a1fc422967c8ce1f98a0cafc71bb
parent 7434263502290f74197d18a3c4e16977782d39ee
Author: Samdal <samdal@protonmail.com>
Date:   Tue,  6 Jul 2021 10:32:54 +0200

remove floor in main.c and change to uint

Diffstat:
M
frag.glsl
 | 
10
+++++-----
M
main.c
 | 
8
++++----

2 files changed, 9 insertions(+), 9 deletions(-)
diff --git a/frag.glsl b/frag.glsl
@@ -8,11 +8,11 @@ uniform vec2 u_food;
 
 void main()
 {
-    vec2 st = (gl_FragCoord.xy / u_resolution.xy) * 31.0;
-    int x = int(floor(st.x));
-    int y = int(floor(st.y));
-    diffuseColor.g = float(u_map[y] & (1 << x));
-    diffuseColor.r = float(x == int(u_food.x) && y == int(u_food.y));
+    vec2 st = (gl_FragCoord.xy / u_resolution.xy) * 32.0;
+    uint x = uint(floor(st.x));
+    uint y = uint(floor(st.y));
+    diffuseColor.g = float(uint(u_map[y]) & uint(1 << x));
+    diffuseColor.r = float(x == uint(u_food.x) && y == uint(u_food.y));
     diffuseColor.b = 0.0;
     diffuseColor.a = 1.0;
 }
diff --git a/main.c b/main.c
@@ -87,7 +87,7 @@ void new_game()
         body->pos = (gs_vec2){16.0f, 16.0f};
 
         // place tail piece in map_buffer
-        map_buffer[(int)floor(body->pos.y)] |= (1 << (int)floor(body->pos.x));
+        map_buffer[(int)body->pos.y] |= (1 << (int)body->pos.x);
 
         for (uint32_t i = 1; i <= 3; i++) {
                 // create snake piece
@@ -100,7 +100,7 @@ void new_game()
                 body->next = NULL;
 
                 // place snake piece in map_buffer
-                map_buffer[(int)floor(body->pos.y)] |= (1 << (int)floor(body->pos.x));
+                map_buffer[(int)body->pos.y] |= (1 << (int)body->pos.x);
         }
 
         // place food at random position
@@ -140,7 +140,7 @@ void move_snake()
         } else {
                 // remove tail from buffer
                 body = tail;
-                map_buffer[(int)floor(body->pos.y)] &= ~(1 << (int)floor(body->pos.x));
+                map_buffer[(int)body->pos.y] &= ~(1 << (int)body->pos.x);
 
                 // move each snake piece to the next ones position
                 while (body->next) {
@@ -158,7 +158,7 @@ void move_snake()
                 }
         }
         // add head to buffer
-        map_buffer[(int)floor(body->pos.y)] |= (1 << (int)floor(body->pos.x));
+        map_buffer[(int)body->pos.y] |= (1 << (int)body->pos.x);
 }
 
 void init()