Review contributed examples

examples/core/core_quat_conversion.c

@@ -2,29 +2,21 @@
 *
 *   raylib [core] example - quat conversions
 *
-*   Welcome to raylib!
+*   Generally you should really stick to eulers OR quats...
+*   This tests that various conversions are equivalent.
 *
-*	generally you should really stick to eulers OR quats...
-*   This tests that various conversions are equivilant.
-*
-*   You can find all basic examples on [C:\raylib\raylib\examples] directory and
-*   raylib official webpage: [www.raylib.com]
-*
-*   Enjoy using raylib. :)
-*
-*   This example has been created using raylib 1.0 (www.raylib.com)
+*   This example has been created using raylib 3.5 (www.raylib.com)
 *   raylib is licensed under an unmodified zlib/libpng license (View raylib.h for details)
 *
-*   Copyright (c) 2013-2020 Ramon Santamaria (@raysan5)
+*   Example contributed by @chriscamacho and @codifies, reviewed by Ramon Santamaria (@raysan5)
+*
+*   Copyright (c) 2020 @chriscamacho and @codifies
 *
 ********************************************************************************************/
 
 #include "raylib.h"
-#include "raymath.h"
 
-#ifndef PI2
-	#define PI2 PI*2
-#endif
+#include "raymath.h"
 
 int main(void)
 {
@@ -48,23 +40,25 @@ int main(void)
     SetTargetFPS(60);               // Set our game to run at 60 frames-per-second
     //--------------------------------------------------------------------------------------
 
-	Quaternion q1;
-	Matrix m1,m2,m3,m4;
-	Vector3 v1,v2;
-	
+    Quaternion q1;
+    Matrix m1,m2,m3,m4;
+    Vector3 v1,v2;
+    
     // Main game loop
     while (!WindowShouldClose())    // Detect window close button or ESC key
     {
         // Update
-        if (!IsKeyDown(KEY_SPACE)) {
+        //--------------------------------------------------------------------------------------
+        if (!IsKeyDown(KEY_SPACE))
+        {
             v1.x += 0.01;
             v1.y += 0.03;
             v1.z += 0.05;
         }
             
-        if (v1.x > PI2) v1.x-=PI2;
-        if (v1.y > PI2) v1.y-=PI2;
-        if (v1.z > PI2) v1.z-=PI2;
+        if (v1.x > PI*2) v1.x -= PI*2;
+        if (v1.y > PI*2) v1.y -= PI*2;
+        if (v1.z > PI*2) v1.z -= PI*2;
         
         q1 = QuaternionFromEuler(v1.x, v1.y, v1.z);
         m1 = MatrixRotateZYX(v1);
@@ -74,10 +68,13 @@ int main(void)
         m3 = QuaternionToMatrix(q1);
         
         v2 = QuaternionToEuler(q1);       
-        v2.x*=DEG2RAD; v2.y*=DEG2RAD; v2.z*=DEG2RAD; 
+        v2.x *= DEG2RAD; 
+        v2.y *= DEG2RAD; 
+        v2.z *=DEG2RAD; 
         
         m4 = MatrixRotateZYX(v2);
-
+        //--------------------------------------------------------------------------------------
+        
         // Draw
         //----------------------------------------------------------------------------------
         BeginDrawing();
@@ -94,17 +91,16 @@ int main(void)
                 mod.transform = m4;
                 DrawModel(mod, (Vector3){0,0,-1},1.0,RED);
 
-
                 DrawGrid(10, 1.0f);
  
             EndMode3D();
         
-            if (v2.x<0) v2.x+=PI2;
-            if (v2.y<0) v2.y+=PI2;
-            if (v2.z<0) v2.z+=PI2;
+            if (v2.x < 0) v2.x += PI*2;
+            if (v2.y < 0) v2.y += PI*2;
+            if (v2.z < 0) v2.z += PI*2;
             
             Color cx,cy,cz;
-            cx=cy=cz=BLACK;
+            cx = cy = cz = BLACK;
             if (v1.x == v2.x) cx = GREEN;
             if (v1.y == v2.y) cy = GREEN;
             if (v1.z == v2.z) cz = GREEN;
@@ -113,7 +109,6 @@ int main(void)
             DrawText(TextFormat("%2.3f",v1.y),20,40,20,cy);
             DrawText(TextFormat("%2.3f",v1.z),20,60,20,cz);
 
-        
             DrawText(TextFormat("%2.3f",v2.x),200,20,20,cx);
             DrawText(TextFormat("%2.3f",v2.y),200,40,20,cy);
             DrawText(TextFormat("%2.3f",v2.z),200,60,20,cz);