C++ 2重载具有类似的转换-游戏项目
C++ 2重载具有类似的转换-游戏项目
提问于 2013-10-01 10:46:14
错误：
Source\_Interface\WndTaskBar.cpp(9681) : error C2666: 'CTexture::RenderRotate' : 2 overloads have similar conversions
Source\_Common\2DRender.h(245): could be 'void CTexture::RenderRotate(C2DRender *,CPoint,FLOAT,BOOL,DWORD,FLOAT,FLOAT)'
Source\_Common\2DRender.h(240): or 'void CTexture::RenderRotate(C2DRender *,CPoint,FLOAT,DWORD,FLOAT,FLOAT)'
while trying to match the argument list '(C2DRender *, CPoint, float, int, float, float)'
Source\Source\_Interface\WndTaskBar.cpp(9682) : error C2666: 'CTexture::RenderRotate' : 2 overloads have similar conversions
Source\_Common\2DRender.h(245): could be 'void CTexture::RenderRotate(C2DRender *,CPoint,FLOAT,BOOL,DWORD,FLOAT,FLOAT)'
Source\_Common\2DRender.h(240): or 'void CTexture::RenderRotate(C2DRender *,CPoint,FLOAT,DWORD,FLOAT,FLOAT)'
while trying to match the argument list '(C2DRender *, CPoint, float, int, float, float)'WndTaskBar.cpp
9679 if( ( m_nActionSlot > 0 )&&( g_WndMng.m_pWndTaskBar->m_nExecute > 0 ))
9680 {
9681 SlotRt2->RenderRotate( p2DRender, CPoint(0,0), RotateSLOT, 255, 1.0f, 1.0f );
9682 SlotEffect2->RenderRotate( p2DRender, CPoint(0,0), RotateSLOT, m_nFlashAlpha[0], 1.0f, 1.0f );
9683 }
9684 else
9685 {
9686 SlotRt2->Render( p2DRender, CPoint(0,0), 255 );
9687 SlotEffect2->Render( p2DRender, CPoint(0,0), 0);
9688 }2DRender.h (其他几行)
227 //BOOL LoadTextureFromRes( LPDIRECT3DDEVICE9 pd3dDevice, LPCTSTR pFileName, D3DCOLOR d3dKeyColor, BOOL bMyLoader = FALSE );
228 void Render( C2DRender* p2DRender, CPoint pt, DWORD dwBlendFactorAlhpa = 255 ) {
229 p2DRender->RenderTexture( pt, this, dwBlendFactorAlhpa );
230 }
231 void Render( C2DRender* p2DRender, CPoint pt, CPoint pt2, DWORD dwBlendFactorAlhpa = 255, FLOAT fscalX = 1.0, FLOAT fscalY = 1.0 ) {
232 p2DRender->RenderTextureEx( pt, pt2, this, dwBlendFactorAlhpa, fscalX, fscalY );
233 }
234 void RenderEx2( C2DRender* p2DRender, CPoint pt, CPoint pt2, DWORD dwBlendFactorAlhpa = 255, FLOAT fscalX = 1.0, FLOAT fscalY = 1.0, D3DCOLOR color = 0 ) {
235 p2DRender->RenderTextureEx2( pt, pt2, this, dwBlendFactorAlhpa, fscalX, fscalY, color );
236 }
237 void RenderScal( C2DRender* p2DRender, CPoint pt, DWORD dwBlendFactorAlhpa = 255, FLOAT fscalX = 1.0, FLOAT fscalY = 1.0 ) {
238 p2DRender->RenderTexture( pt, this, dwBlendFactorAlhpa , fscalX, fscalY );
239 }
240 void RenderRotate( C2DRender* p2DRender, CPoint pt, FLOAT fRadian, DWORD dwBlendFactorAlhpa = 255, FLOAT fscalX = 1.0, FLOAT fscalY = 1.0 ) {
241 p2DRender->RenderTextureRotate( pt, this, dwBlendFactorAlhpa , fscalX, fscalY, fRadian );
242 }
243
244 //added by gmpbigsun : ȸÀüÃà º¯°æ°¡´É ( center or start point )
245 void RenderRotate( C2DRender* p2DRender, CPoint pt, FLOAT fRadian, BOOL bCenter, DWORD dwBlendFactorAlhpa = 255, FLOAT fscalX = 1.0, FLOAT fscalY = 1.0 ) {
246 p2DRender->RenderTextureRotate( pt, this, dwBlendFactorAlhpa, fRadian, bCenter, fscalX, fscalY );
247 }
248
249 void Render2( C2DRender* p2DRender, CPoint pt, D3DCOLOR color, float fscalX = 1.0f, float fscalY = 1.0f ) {
250 p2DRender->RenderTexture2( pt, this, fscalX, fscalY, color );
251 }
252 void RenderScal2( C2DRender* p2DRender, CPoint pt, DWORD dwBlendFactorAlhpa = 255, FLOAT fscalX = 1.0, FLOAT fscalY = 1.0, D3DCOLOR color = 0 ) {
253 p2DRender->RenderTextureColor( pt, this, fscalX, fscalY, color );
254 }所以我对C++真的很陌生，我知道一些基础知识，我试着通过这个预先构建的项目进行反复试验来学习，这不是最好的学习方法，但它会教会我足够的东西来应付我需要的东西。
据我所知，有两种不同的转换，编译器不知道使用哪一种定义，对吧？
回答 2
Stack Overflow用户
发布于 2013-10-01 10:52:43
编译器说当你调用这个函数时，参数列表是(C2DRender *, CPoint, float, int, float, float)。但没有与该调用完全匹配的。
有两个候选人，
void CTexture::RenderRotate(C2DRender *,CPoint,FLOAT,BOOL,DWORD,FLOAT,FLOAT)和void CTexture::RenderRotate(C2DRender *，CPoint，FLOAT，DWORD，FLOAT，FLOAT)
您可以说，可以将int转换为BOOL或DWORD，以匹配其中一个候选者，但编译器认为这两个都是一样好的。所以它不能决定和要求你的澄清。
Stack Overflow用户
发布于 2013-10-01 11:05:51
请看这一行上的代码：
Source\Source\_Interface\WndTaskBar.cpp(9682) : error C2666: 'CTexture::RenderRotate' : 2 overloads have similar conversions并仔细查看参数的类型。编译器说他们的计算结果是
C2DRender *, CPoint, float, int, float, float你有两个非常相似的函数指纹，这两个指纹都不是完全匹配的，但它们都可以接受你通过一些转换提供的参数。
由于参数计数不同，我想您已经体验到了为什么不使用默认参数的第一课。
C2DRender *,CPoint,FLOAT,BOOL,DWORD,FLOAT,FLOAT
C2DRender *,CPoint,FLOAT, DWORD,FLOAT,FLOAT编译器可以将"int“转换为BOOL和DWORD，如果一个或两个函数中的浮点数都有缺省值，它可以充实其余的。
您可以通过准确指定您尝试调用的内容来修复它：
RenderRotate(renderer, point, float1, (BOOL)theBoolValue, (DWORD)theDwordValue, float2, float3);页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/19107132
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