Update hardcoded value of pi to use SDL constant SDL_PI_F for improve…

…d consistency and readability.

test/testgeometry.c

@@ -12,9 +12,10 @@
 
 /* Simple program:  draw a RGB triangle, with texture  */
 
-#include <SDL3/SDL_test_common.h>
-#include <SDL3/SDL_main.h>
 #include "testutils.h"
+#include <SDL3/SDL.h>
+#include <SDL3/SDL_main.h>
+#include <SDL3/SDL_test_common.h>
 
 #ifdef SDL_PLATFORM_EMSCRIPTEN
 #include <emscripten/emscripten.h>
@@ -136,23 +137,23 @@ static void loop(void)
             cx += translate_cx;
             cy += translate_cy;
 
-            a = (angle * 3.1415f) / 180.0f;
+            a = (angle * SDL_PI_F) / 180.0f;
             verts[0].position.x = cx + d * SDL_cosf(a);
             verts[0].position.y = cy + d * SDL_sinf(a);
             verts[0].color.r = 1.0f;
             verts[0].color.g = 0;
             verts[0].color.b = 0;
             verts[0].color.a = 1.0f;
 
-            a = ((angle + 120) * 3.1415f) / 180.0f;
+            a = ((angle + 120) * SDL_PI_F) / 180.0f;
             verts[1].position.x = cx + d * SDL_cosf(a);
             verts[1].position.y = cy + d * SDL_sinf(a);
             verts[1].color.r = 0;
             verts[1].color.g = 1.0f;
             verts[1].color.b = 0;
             verts[1].color.a = 1.0f;
 
-            a = ((angle + 240) * 3.1415f) / 180.0f;
+            a = ((angle + 240) * SDL_PI_F) / 180.0f;
             verts[2].position.x = cx + d * SDL_cosf(a);
             verts[2].position.y = cy + d * SDL_sinf(a);
             verts[2].color.r = 0;