Use tgmath.h and float constants in easings.h

src/easings.h

@@ -1,7 +1,7 @@
 /*******************************************************************************************
 *
 *   raylib easings (header only file)
-*   
+*
 *   Useful easing functions for values animation
 *
 *   This header uses:
@@ -32,31 +32,31 @@
 *
 *   Robert Penner License
 *   ---------------------------------------------------------------------------------
-*   Open source under the BSD License. 
+*   Open source under the BSD License.
 *
 *   Copyright (c) 2001 Robert Penner. All rights reserved.
 *
-*   Redistribution and use in source and binary forms, with or without modification, 
+*   Redistribution and use in source and binary forms, with or without modification,
 *   are permitted provided that the following conditions are met:
 *
-*       - Redistributions of source code must retain the above copyright notice, 
+*       - Redistributions of source code must retain the above copyright notice,
 *         this list of conditions and the following disclaimer.
-*       - Redistributions in binary form must reproduce the above copyright notice, 
-*         this list of conditions and the following disclaimer in the documentation 
+*       - Redistributions in binary form must reproduce the above copyright notice,
+*         this list of conditions and the following disclaimer in the documentation
 *         and/or other materials provided with the distribution.
-*       - Neither the name of the author nor the names of contributors may be used 
-*         to endorse or promote products derived from this software without specific 
+*       - Neither the name of the author nor the names of contributors may be used
+*         to endorse or promote products derived from this software without specific
 *         prior written permission.
 *
-*   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND 
-*   ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 
-*   WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 
-*   IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 
-*   INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 
-*   BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 
-*   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 
-*   LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE 
-*   OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 
+*   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+*   ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+*   WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+*   IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
+*   INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+*   BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+*   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+*   LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+*   OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 *   OF THE POSSIBILITY OF SUCH DAMAGE.
 *   ---------------------------------------------------------------------------------
 *
@@ -90,7 +90,7 @@
     #define EASEDEF extern
 #endif
 
-#include <math.h>       // Required for: sin(), cos(), sqrt(), pow()
+#include <tgmath.h>       // Required for: sin(), cos(), sqrt(), pow()
 
 #ifndef PI
     #define PI 3.14159265358979323846f //Required as PI is not always defined in math.h
@@ -107,153 +107,153 @@ EASEDEF float EaseLinearOut(float t, float b, float c, float d) { return (c*t/d
 EASEDEF float EaseLinearInOut(float t,float b, float c, float d) { return (c*t/d + b); }
 
 // Sine Easing functions
-EASEDEF float EaseSineIn(float t, float b, float c, float d) { return (-c*cos(t/d*(PI/2)) + c + b); }
-EASEDEF float EaseSineOut(float t, float b, float c, float d) { return (c*sin(t/d*(PI/2)) + b); }
-EASEDEF float EaseSineInOut(float t, float b, float c, float d) { return (-c/2*(cos(PI*t/d) - 1) + b); }
+EASEDEF float EaseSineIn(float t, float b, float c, float d) { return (-c*cos(t/d*(PI/2.0f)) + c + b); }
+EASEDEF float EaseSineOut(float t, float b, float c, float d) { return (c*sin(t/d*(PI/2.0f)) + b); }
+EASEDEF float EaseSineInOut(float t, float b, float c, float d) { return (-c/2.0f*(cos(PI*t/d) - 1.0f) + b); }
 
 // Circular Easing functions
-EASEDEF float EaseCircIn(float t, float b, float c, float d) { t /= d; return (-c*(sqrt(1 - t*t) - 1) + b); }
-EASEDEF float EaseCircOut(float t, float b, float c, float d) { t = t/d - 1; return (c*sqrt(1 - t*t) + b); }
-EASEDEF float EaseCircInOut(float t, float b, float c, float d) 
+EASEDEF float EaseCircIn(float t, float b, float c, float d) { t /= d; return (-c*(sqrt(1.0f - t*t) - 1.0f) + b); }
+EASEDEF float EaseCircOut(float t, float b, float c, float d) { t = t/d - 1.0f; return (c*sqrt(1.0f - t*t) + b); }
+EASEDEF float EaseCircInOut(float t, float b, float c, float d)
 {
-    if ((t/=d/2) < 1) return (-c/2*(sqrt(1 - t*t) - 1) + b);
-    t -= 2; return (c/2*(sqrt(1 - t*t) + 1) + b);
+    if ((t/=d/2.0f) < 1.0f) return (-c/2.0f*(sqrt(1.0f - t*t) - 1.0f) + b);
+    t -= 2.0f; return (c/2.0f*(sqrt(1.0f - t*t) + 1.0f) + b);
 }
 
 // Cubic Easing functions
 EASEDEF float EaseCubicIn(float t, float b, float c, float d) { t /= d; return (c*t*t*t + b); }
-EASEDEF float EaseCubicOut(float t, float b, float c, float d) { t = t/d-1; return (c*(t*t*t + 1) + b); }
-EASEDEF float EaseCubicInOut(float t, float b, float c, float d) 
-{ 
-    if ((t/=d/2) < 1) return (c/2*t*t*t + b);
-    t -= 2; return (c/2*(t*t*t + 2) + b);
+EASEDEF float EaseCubicOut(float t, float b, float c, float d) { t = t/d - 1.0f; return (c*(t*t*t + 1.0f) + b); }
+EASEDEF float EaseCubicInOut(float t, float b, float c, float d)
+{
+    if ((t/=d/2.0f) < 1.0f) return (c/2.0f*t*t*t + b);
+    t -= 2.0f; return (c/2.0f*(t*t*t + 2.0f) + b);
 }
 
 // Quadratic Easing functions
 EASEDEF float EaseQuadIn(float t, float b, float c, float d) { t /= d; return (c*t*t + b); }
-EASEDEF float EaseQuadOut(float t, float b, float c, float d) { t /= d; return (-c*t*(t - 2) + b); }
-EASEDEF float EaseQuadInOut(float t, float b, float c, float d) 
+EASEDEF float EaseQuadOut(float t, float b, float c, float d) { t /= d; return (-c*t*(t - 2.0f) + b); }
+EASEDEF float EaseQuadInOut(float t, float b, float c, float d)
 {
     if ((t/=d/2) < 1) return (((c/2)*(t*t)) + b);
-    t--; return (-c/2*(((t - 2)*t) - 1) + b);
+	return (-c/2.0f*(((t - 1.0f)*(t - 3.0f)) - 1.0f) + b);
 }
 
 // Exponential Easing functions
-EASEDEF float EaseExpoIn(float t, float b, float c, float d) { return (t == 0) ? b : (c*pow(2, 10*(t/d - 1)) + b); }
-EASEDEF float EaseExpoOut(float t, float b, float c, float d) { return (t == d) ? (b + c) : (c*(-pow(2, -10*t/d) + 1) + b);    }
-EASEDEF float EaseExpoInOut(float t, float b, float c, float d) 
+EASEDEF float EaseExpoIn(float t, float b, float c, float d) { return (t == 0.0f) ? b : (c*pow(2.0f, 10.0f*(t/d - 1.0f)) + b); }
+EASEDEF float EaseExpoOut(float t, float b, float c, float d) { return (t == d) ? (b + c) : (c*(-pow(2.0f, -10.0f*t/d) + 1.0f) + b);    }
+EASEDEF float EaseExpoInOut(float t, float b, float c, float d)
 {
-    if (t == 0) return b;
+    if (t == 0.0f) return b;
     if (t == d) return (b + c);
-    if ((t/=d/2) < 1) return (c/2*pow(2, 10*(t - 1)) + b);
-    
-    return (c/2*(-pow(2, -10*--t) + 2) + b);
+    if ((t/=d/2.0f) < 1.0f) return (c/2.0f*pow(2.0f, 10.0f*(t - 1.0f)) + b);
+
+	return (c/2.0f*(-pow(2.0f, -10.0f*(t - 1.0f)) + 2.0f) + b);
 }
 
 // Back Easing functions
-EASEDEF float EaseBackIn(float t, float b, float c, float d) 
+EASEDEF float EaseBackIn(float t, float b, float c, float d)
 {
     float s = 1.70158f;
     float postFix = t/=d;
-    return (c*(postFix)*t*((s + 1)*t - s) + b);
+    return (c*(postFix)*t*((s + 1.0f)*t - s) + b);
 }
 
 EASEDEF float EaseBackOut(float t, float b, float c, float d)
-{    
+{
     float s = 1.70158f;
-    t = t/d - 1;
-    return (c*(t*t*((s + 1)*t + s) + 1) + b);
+    t = t/d - 1.0f;
+    return (c*(t*t*((s + 1.0f)*t + s) + 1.0f) + b);
 }
 
 EASEDEF float EaseBackInOut(float t, float b, float c, float d)
 {
     float s = 1.70158f;
-    if ((t/=d/2) < 1) 
+    if ((t/=d/2.0f) < 1.0f)
     {
         s *= 1.525f;
-        return (c/2*(t*t*((s + 1)*t - s)) + b);
+        return (c/2.0f*(t*t*((s + 1.0f)*t - s)) + b);
     }
-    
-    float postFix = t-=2;
+
+    float postFix = t-=2.0f;
     s *= 1.525f;
-    return (c/2*((postFix)*t*((s + 1)*t + s) + 2) + b);
+    return (c/2.0f*((postFix)*t*((s + 1.0f)*t + s) + 2.0f) + b);
 }
 
 // Bounce Easing functions
-EASEDEF float EaseBounceOut(float t, float b, float c, float d) 
+EASEDEF float EaseBounceOut(float t, float b, float c, float d)
 {
-    if ((t/=d) < (1/2.75f)) 
+    if ((t/=d) < (1.0f/2.75f))
     {
         return (c*(7.5625f*t*t) + b);
-    } 
-    else if (t < (2/2.75f)) 
+    }
+    else if (t < (2.0f/2.75f))
     {
         float postFix = t-=(1.5f/2.75f);
         return (c*(7.5625f*(postFix)*t + 0.75f) + b);
-    } 
-    else if (t < (2.5/2.75)) 
+    }
+    else if (t < (2.5/2.75))
     {
         float postFix = t-=(2.25f/2.75f);
         return (c*(7.5625f*(postFix)*t + 0.9375f) + b);
-    } 
-    else 
+    }
+    else
     {
         float postFix = t-=(2.625f/2.75f);
         return (c*(7.5625f*(postFix)*t + 0.984375f) + b);
     }
 }
 
-EASEDEF float EaseBounceIn(float t, float b, float c, float d) { return (c - EaseBounceOut(d-t, 0, c, d) + b); }
-EASEDEF float EaseBounceInOut(float t, float b, float c, float d) 
+EASEDEF float EaseBounceIn(float t, float b, float c, float d) { return (c - EaseBounceOut(d - t, 0.0f, c, d) + b); }
+EASEDEF float EaseBounceInOut(float t, float b, float c, float d)
 {
-    if (t < d/2) return (EaseBounceIn(t*2, 0, c, d)*0.5f + b);
-    else return (EaseBounceOut(t*2-d, 0, c, d)*0.5f + c*0.5f + b);
+    if (t < d/2.0f) return (EaseBounceIn(t*2.0f, 0.0f, c, d)*0.5f + b);
+    else return (EaseBounceOut(t*2.0f - d, 0.0f, c, d)*0.5f + c*0.5f + b);
 }
 
 // Elastic Easing functions
-EASEDEF float EaseElasticIn(float t, float b, float c, float d) 
+EASEDEF float EaseElasticIn(float t, float b, float c, float d)
 {
-    if (t == 0) return b;
-    if ((t/=d) == 1) return (b + c);
-    
+    if (t == 0.0f) return b;
+    if ((t/=d) == 1.0f) return (b + c);
+
     float p = d*0.3f;
-    float a = c; 
-    float s = p/4;
-    float postFix = a*pow(2, 10*(t-=1));
-    
-    return (-(postFix*sin((t*d-s)*(2*PI)/p )) + b);
+    float a = c;
+    float s = p/4.0f;
+    float postFix = a*pow(2.0f, 10.0f*(t-=1.0f));
+
+    return (-(postFix*sin((t*d-s)*(2.0f*PI)/p )) + b);
 }
 
 EASEDEF float EaseElasticOut(float t, float b, float c, float d)
 {
-    if (t == 0) return b;
-    if ((t/=d) == 1) return (b + c);
-    
+    if (t == 0.0f) return b;
+    if ((t/=d) == 1.0f) return (b + c);
+
     float p = d*0.3f;
-    float a = c; 
-    float s = p/4;
-    
-    return (a*pow(2,-10*t)*sin((t*d-s)*(2*PI)/p) + c + b);    
+    float a = c;
+    float s = p/4.0f;
+
+    return (a*pow(2.0f,-10.0f*t)*sin((t*d-s)*(2.0f*PI)/p) + c + b);
 }
 
 EASEDEF float EaseElasticInOut(float t, float b, float c, float d)
 {
-    if (t == 0) return b;
-    if ((t/=d/2) == 2) return (b + c);
-    
+    if (t == 0.0f) return b;
+    if ((t/=d/2.0f) == 2.0f) return (b + c);
+
     float p = d*(0.3f*1.5f);
     float a = c;
-    float s = p/4;
+    float s = p/4.0f;
 
-    if (t < 1) 
+    if (t < 1.0f)
     {
-        float postFix = a*pow(2, 10*(t-=1));
-        return -0.5f*(postFix*sin((t*d-s)*(2*PI)/p)) + b;
+        float postFix = a*pow(2.0f, 10.0f*(t-=1.0f));
+        return -0.5f*(postFix*sin((t*d-s)*(2.0f*PI)/p)) + b;
     }
-    
-    float postFix = a*pow(2, -10*(t-=1));
-    
-    return (postFix*sin((t*d-s)*(2*PI)/p)*0.5f + c + b);
+
+    float postFix = a*pow(2.0f, -10.0f*(t-=1.0f));
+
+    return (postFix*sin((t*d-s)*(2.0f*PI)/p)*0.5f + c + b);
 }
 
 #ifdef __cplusplus