apps/examples/circle-raster/game.c

@@ -13,53 +13,6 @@
         for (float x = p_center_x - ceilf(sqrtf(p_radius * p_radius - (y - p_center_y + (y <= p_center_y)) * (y - p_center_y + (y <= p_center_y)))); x < p_center_x + ceilf(sqrtf(p_radius * p_radius - (y - p_center_y + (y <= p_center_y)) * (y - p_center_y + (y <= p_center_y)))); ++x)
 
 
-static int32_t ceil_sqrt(int32_t const n) {
-    int32_t res = 1;
-    #pragma clang loop unroll_count(8)
-    while(res * res < n)
-        res++;
-    return res;
-}
-
-
-static void benchmark(struct state *state) {
-    volatile float x, y;
-
-    profile_start("float");
-
-    for (int i = 0; i < 1000; ++i) {
-        float const rs = state->r * state->r;
-        float const cr = ceilf(state->r);
-        for (float iy = -cr; iy <= cr - 1; ++iy) {
-            float const dx = ceilf(sqrtf(rs - (iy + (iy <= 0)) * (iy + (iy <= 0))));
-            for (float ix = -dx; ix < dx; ++ix) {
-                x = ix;
-                y = iy;
-            }
-        }
-    }
-
-    profile_end("float");
-
-    profile_start("int32_t");
-
-    for (int i = 0; i < 1000; ++i) {
-        int32_t const rsi = (int32_t)state->r * (int32_t)state->r;
-        for (int32_t iy = -(int32_t)state->r; iy <= (int32_t)state->r - 1; ++iy) {
-            int32_t const dx = ceil_sqrt(rsi - (iy + (iy <= 0)) * (iy + (iy <= 0)));
-            for (int32_t ix = -dx; ix < dx; ++ix) {
-                x = (float)ix;
-                y = (float)iy;
-            }
-        }
-    }
-
-    profile_end("int32_t");
-
-    (void)x; (void)y;
-}
-
-
 void game_tick(void) {
     if (ctx.initialization_needed) {
         if (!ctx.udata) {
@@ -81,17 +34,16 @@ void game_tick(void) {
     if (input_action_just_pressed("down"))
         state->r -= 1;
 
-    int32_t const rsi = (int32_t)state->r * (int32_t)state->r;
+    float const rs = state->r * state->r;
-    for (int32_t iy = -(int32_t)state->r; iy <= (int32_t)state->r - 1; ++iy) {
+    float const cr = ceilf(state->r);
-        int32_t const dx = ceil_sqrt(rsi - (iy + (iy <= 0)) * (iy + (iy <= 0)));
+    for (float iy = cr - 1; iy > -cr - 1; --iy) {
-        for (int32_t ix = -dx; ix < dx; ++ix) {
+        float const dx = ceilf(sqrtf(rs - (iy + (iy <= 0)) * (iy + (iy <= 0))));
-            draw_box((Rect){mouse_snap.x + (float)ix * 8, mouse_snap.y + (float)iy * 8, 8, 8}, 1, (Color){125, 125, 0, 255});
+        for (float ix = -dx; ix < dx; ++ix) {
+            draw_box((Rect){mouse_snap.x + ix * 8, mouse_snap.y + iy * 8, 8, 8}, 1, (Color){255, 0, 0, 125});
         }
     }
 
     draw_circle(mouse_snap, state->r * 8, (Color){125, 125, 125, 125});
-
-    benchmark(state);
 }
 
 

include/twn_util.h

@@ -84,8 +84,4 @@ TWN_API void log_vec2(Vec2 vector, char const *message);
 TWN_API void log_vec3(Vec3 vector, char const *message);
 TWN_API void log_rect(Rect rect, char const *message);
 
-TWN_API void profile_start(char profile[const static 1]);
-TWN_API void profile_end(char profile[const static 1]);
-TWN_API void profile_list_stats(void);
-
 #endif

src/twn_util_c.h

@@ -23,6 +23,10 @@ _Noreturn void die_abruptly(void);
 /* note: you must free the returned string */
 char *expand_asterisk(const char *mask, const char *to);
 
+void profile_start(char profile[const static 1]);
+void profile_end(char profile[const static 1]);
+void profile_list_stats(void);
+
 /* http://www.azillionmonkeys.com/qed/sqroot.html */
 static inline float fast_sqrt(float x)
 {