various fixes and formatting tweaks

examples/models/models_directional_billboard.c

@@ -18,6 +18,7 @@
 
 #include "raylib.h"
 #include "raymath.h"
+#include <math.h>
 
 //------------------------------------------------------------------------------------
 // Program main entry point
@@ -68,9 +69,15 @@ int main(void)
         }
 
         // Reset frame index to zero on overflow
-        if (anim >= 4)
+        if (anim >= 4) anim = 0;
+
+        // Find the current direction frame based on the camera position to the billboard object
+        float dir = (float)floor(((Vector2Angle((Vector2){ 2.0f, 0.0f }, (Vector2){ camera.position.x, camera.position.z })/PI)*4.0f) + 0.25f);
+
+        // Correct frame index if angle is negative
+        if (dir < 0.0f)
         {
-            anim = 0;
+            dir = 8.0f - (float)abs((int)dir);
         }
         //----------------------------------------------------------------------------------
 
@@ -83,15 +90,6 @@ int main(void)
         BeginMode3D(camera);
 
             DrawGrid(10, 1.0f);
-            
-            // Find the current direction frame based on the camera position to the billboard object
-            float dir = (float)floor(((Vector2Angle((Vector2){ 2.0f, 0.0f }, (Vector2){ camera.position.x, camera.position.z })/PI)*4.0f) + 0.25f);
-
-            // Correct frame index if angle is negative
-            if (dir < 0.0f)
-            {
-                dir = 8.0f - (float)abs((int)dir);
-            }
 
             // Draw billboard pointing straight up to the sky, rotated relative to the camera and offset from the bottom
             DrawBillboardPro(camera, skillbot, (Rectangle){ 0.0f + (anim*24.0f), 0.0f + (dir*24.0f), 24.0f, 24.0f }, Vector3Zero(), (Vector3){ 0.0f, 1.0f, 0.0f }, Vector2One(), (Vector2){ 0.5f, 0.0f }, 0, WHITE);