core_common.cpp

旋转图像Demo和其源代码

/**************************************************
公用头文件和公用函数模块
Author:  LittleFish     QQ:93663886 
E-Mail:  [e-mail]
Blog:    http://blog.csdn.net/kittyfish
真诚的期待你提出改良方法或程序BUG
**************************************************/


#include "Core_Common.h"

//Common Function
void MB( TCHAR* strFormat, ... )
{
	static bool b = false;
	if( b )
		return ;
	va_list args;
	TCHAR str[256];
	memset( str, 0, sizeof( str ) );
	va_start( args, strFormat );
	_vstprintf( str, strFormat, args );
	va_end( args );
	b = true;
	MessageBox( GetActiveWindow(), str, _T("MB"), MB_OK );
}

void DebugMB( TCHAR* strFormat, ... )
{
#ifdef _DEBUG
	va_list args;
	TCHAR str[256];
	memset( str, 0, sizeof( str ) );
	va_start( args, strFormat );
	_vstprintf( str, strFormat, args );
	va_end( args );
	MessageBox( GetActiveWindow(), str, _T("MB"), MB_OK );
#endif
}

BOOL IsBetween( int curr, int left, int right )
{
	return ( curr >= left && curr <= right );
}

BOOL Execute( LPCTSTR strFileName )
{
	return (::ShellExecute( NULL, _T("open"), strFileName, NULL, NULL, SW_SHOWNORMAL ) > (HINSTANCE)32 );
}

float B3spLine( float x )
{
	float a, b, c, d;
	float xm1 = x - 1.0f; 
	float xp1 = x + 1.0f;
	float xp2 = x + 2.0f;

	// Only float, 不能float -> double -> float
	if ((xp2) <= 0.0f) 
		a = 0.0f; 
	else 
		a = xp2*xp2*xp2; 

	if ((xp1) <= 0.0f) 
		b = 0.0f; 
	else 		
		b = xp1*xp1*xp1;

	if (x <= 0)
		c = 0.0f;
	else
		c = x*x*x;  

	if ((xm1) <= 0.0f) 
		d = 0.0f; 
	else 
		d = xm1*xm1*xm1;

	return (0.16666666666666666667f * (a - (4.0f * b) + (6.0f * c) - (4.0f * d)));
}