Comments tweaks

1 files changed, 7 insertions, 8 deletions

diff --git a/src/shapes.c b/src/shapes.c
index 62076b2c..79cf567a 100644
--- a/src/shapes.c
+++ b/src/shapes.c
@@ -4,7 +4,7 @@
 *
 *   Basic functions to draw 2d Shapes and check collisions
 *
-*   Copyright (c) 2014 Ramon Santamaria (@raysan5)
+*   Copyright (c) 2014-2016 Ramon Santamaria (@raysan5)
 *
 *   This software is provided "as-is", without any express or implied warranty. In no event
 *   will the authors be held liable for any damages arising from the use of this software.
@@ -25,9 +25,8 @@
 
 #include "raylib.h"
 
-#include <stdlib.h>     // Required for abs() function
-#include <math.h>       // Math related functions, sin() and cos() used on DrawCircle*
-                        // sqrt() and pow() and abs() used on CheckCollision*
+#include <stdlib.h>     // Required for: abs()
+#include <math.h>       // Required for: sinf(), cosf(), sqrtf()
 
 #include "rlgl.h"       // raylib OpenGL abstraction layer to OpenGL 1.1, 3.3+ or ES2
 
@@ -331,8 +330,8 @@ void DrawPoly(Vector2 center, int sides, float radius, float rotation, Color col
                 rlColor4ub(color.r, color.g, color.b, color.a);
 
                 rlVertex2f(0, 0);
-                rlVertex2f(sin(DEG2RAD*i)*radius, cos(DEG2RAD*i)*radius);
-                rlVertex2f(sin(DEG2RAD*(i + 360/sides))*radius, cos(DEG2RAD*(i + 360/sides))*radius);
+                rlVertex2f(sinf(DEG2RAD*i)*radius, cosf(DEG2RAD*i)*radius);
+                rlVertex2f(sinf(DEG2RAD*(i + 360/sides))*radius, cosf(DEG2RAD*(i + 360/sides))*radius);
             }
         rlEnd();
     rlPopMatrix();
@@ -434,7 +433,7 @@ bool CheckCollisionCircles(Vector2 center1, float radius1, Vector2 center2, floa
     float dx = center2.x - center1.x;      // X distance between centers
     float dy = center2.y - center1.y;      // Y distance between centers
 
-    float distance = sqrt(dx*dx + dy*dy);  // Distance between centers
+    float distance = sqrtf(dx*dx + dy*dy); // Distance between centers
 
     if (distance <= (radius1 + radius2)) collision = true;
 
@@ -457,7 +456,7 @@ bool CheckCollisionCircleRec(Vector2 center, float radius, Rectangle rec)
     if (dx <= (rec.width/2)) { return true; } 
     if (dy <= (rec.height/2)) { return true; }
 
-    float cornerDistanceSq = pow(dx - rec.width/2, 2) + pow(dy - rec.height/2, 2);
+    float cornerDistanceSq = (dx - rec.width/2)*(dx - rec.width/2) + (dy - rec.height/2)*(dy - rec.height/2);
 
     return (cornerDistanceSq <= (radius*radius));
 }