view range factor implementation

usefull.h

@@ -9,17 +9,7 @@ http://mozilla.org/MPL/2.0/.
 
 #pragma once
 
-//#define	B1(t)     (t*t*t)
-//#define	B2(t)     (3*t*t*(1-t))
-//#define	B3(t)     (3*t*(1-t)*(1-t))
-//#define	B4(t)     ((1-t)*(1-t)*(1-t))
-// Ra: to jest mocno nieoptymalne: 10+3*4=22 mnożenia, 6 odejmowań, 3*3=9 dodawań
-// Ra: po przeliczeniu współczynników mamy: 3*3=9 mnożeń i 3*3=9 dodawań
-//#define	Interpolate(t,p1,cp1,cp2,p2)     (B4(t)*p1+B3(t)*cp1+B2(t)*cp2+B1(t)*p2)
-
-// Ra: "delete NULL" nic nie zrobi, więc "if (a!=NULL)" jest zbędne
-//#define SafeFree(a) if (a!=NULL) free(a)
-//#define M_PI  = 3.141592653589793
+#include "stdafx.h"
 
 #define SafeDelete(a) \
     {                 \
@@ -37,25 +27,26 @@ http://mozilla.org/MPL/2.0/.
 #define DegToRad(a) ((M_PI / 180.0) * (a)) //(a) w nawiasie, bo może być dodawaniem
 #define RadToDeg(r) ((180.0 / M_PI) * (r))
 
-#define Fix(a, b, c) \
-    {                \
-        if (a < b)   \
-            a = b;   \
-        if (a > c)   \
-            a = c;   \
-    }
-
 #define asModelsPath std::string("models\\")
 #define asSceneryPath std::string("scenery\\")
-//#define asTexturePath AnsiString("textures\\")
-//#define asTextureExt AnsiString(".bmp")
 #define szSceneryPath "scenery\\"
 #define szTexturePath "textures\\"
-//#define szDefaultTextureExt ".dds"
-
-//#define DevelopTime     //FIXME
-//#define EditorMode
 
 #define MAKE_ID4(a,b,c,d) (((std::uint32_t)(d)<<24)|((std::uint32_t)(c)<<16)|((std::uint32_t)(b)<<8)|(std::uint32_t)(a))
 
+template <typename _Type>
+_Type clamp( _Type const Value, _Type const Min, _Type const Max ) {
+
+    _Type value = Value;
+    if( value < Min ) { value = Min; }
+    if( value > Max ) { value = Max; }
+    return value;
+}
+
+template <typename _Type>
+_Type interpolate( _Type const First, _Type const Second, float const Factor ) {
+
+    return ( First * ( 1.0f - Factor ) ) + ( Second * Factor );
+}
+
 //---------------------------------------------------------------------------