Small improvements on snake example.

1 files changed, 22 insertions, 17 deletions

diff --git a/snake.jai b/snake.jai
index ea8926f..e3a15f6 100644
--- a/snake.jai
+++ b/snake.jai
@@ -1,6 +1,6 @@
 #import "Basic";
 #import "Random";
-TUI :: #import "TUI";
+TUI :: #import "TUI"(COLOR_MODE = 8);
 
 Vec2D :: struct {
     x: int;
@@ -24,13 +24,6 @@ main :: () {
         score := 0;
         dir := Vec2D.{1, 0};
         food := Vec2D.{5, 5};
-
-        random_food :: () -> Vec2D {
-            return Vec2D.{
-                cast(int)(random_get_zero_to_one_open() * (screen_size_x-3) + 2),
-                cast(int)(random_get_zero_to_one_open() * (screen_size_y-3) + 2)
-            };
-        }
         
         snake_parts: [..] Vec2D;
         for 0..13 array_add(*snake_parts, Vec2D.{3, 3});
@@ -51,7 +44,6 @@ main :: () {
                     TUI.draw_box(1, 1, screen_size_x, screen_size_y);
                     TUI.set_cursor_position(3, screen_size_y);
                     write_strings(" ", player_name, " ");
-                    food = random_food();
 
                 case #char "q"; #through;
                 case #char "Q"; #through;
@@ -71,6 +63,13 @@ main :: () {
                     if dir != Vec2D.{-1, 0} then dir = Vec2D.{1, 0};
             }
 
+            if screen_size_x < 15 || screen_size_y < 15 {
+                TUI.clear_terminal();
+                TUI.set_cursor_position(1,1);
+                write_string("~ paused : increase window size ~");
+                continue;
+            }
+
             last_pos := snake_parts[snake_parts.count-1];
 
             // Update position.
@@ -83,10 +82,12 @@ main :: () {
             snake_parts[0].y += dir.y;
 
             // Teleport on borders.
-            if snake_parts[0].x < 2         then snake_parts[0].x = screen_size_x - 1;
-            if snake_parts[0].x >= screen_size_x   then snake_parts[0].x = 2;
-            if snake_parts[0].y < 2         then snake_parts[0].y = screen_size_y - 1;
-            if snake_parts[0].y >= screen_size_y   then snake_parts[0].y = 2;
+            if snake_parts[0].x < 2                 then snake_parts[0].x = screen_size_x - 1;
+            if snake_parts[0].x >= screen_size_x    then snake_parts[0].x = 2;
+            if snake_parts[0].y < 2                 then snake_parts[0].y = screen_size_y - 1;
+            if snake_parts[0].y >= screen_size_y    then snake_parts[0].y = 2;
+            food.x = clamp(food.x, 2, screen_size_x-1);
+            food.y = clamp(food.y, 2, screen_size_y-1);
 
             // Check for game-over.
             for 1..snake_parts.count-1 {
@@ -99,7 +100,10 @@ main :: () {
             if snake_parts[0] == food {
                 score += 1;
                 array_add(*snake_parts, snake_parts[snake_parts.count-1]);
-                food = random_food();
+                food = Vec2D.{
+                    cast(int)(random_get_zero_to_one_open() * (screen_size_x-3) + 2),
+                    cast(int)(random_get_zero_to_one_open() * (screen_size_y-3) + 2)
+                    };
             }
             
             // Wait to match game loop time.
@@ -143,10 +147,11 @@ main :: () {
         game_loop();
 
         // Game over screen.
-        TUI.draw_box(screen_size_x/3, screen_size_y/2-1, screen_size_x/3, 4);
-        TUI.set_cursor_position((screen_size_x-GAME_OVER_TEXT.count)/2, screen_size_y/2);
+        box_size := Vec2D.{19, 4};
+        TUI.draw_box((screen_size_x-box_size.x)/2, (screen_size_y-box_size.y)/2, box_size.x, box_size.y);
+        TUI.set_cursor_position((screen_size_x-GAME_OVER_TEXT.count)/2, (screen_size_y-box_size.y)/2 + 1);
         write_string(GAME_OVER_TEXT);
-        TUI.set_cursor_position((screen_size_x-GAME_OVER_TEXT.count)/2, screen_size_y/2+1);
+        TUI.set_cursor_position((screen_size_x-GAME_OVER_TEXT.count)/2, (screen_size_y-box_size.y)/2 + 2);
         write_string(INSTRUCTIONS_TEXT);
         sleep_milliseconds(100);
         TUI.flush_input();