一点关于摄像机的问题

monkeyboi

试图把摄像机单独弄成一个类 感觉应该挺简单 但是写完后遇到一个很诡异的问题
void MyCamera::SetupCamera(){

        D3DXMATRIX View;
        D3DXMatrixLookAtLH(&mView, &mPosition, &mLookat, &mUp);
        View = mView;
        mDevice->SetTransform(D3DTS_VIEW, &View);
}
void MyCamera::SetupPerspective(){

        D3DXMATRIX projection;
        D3DXMatrixPerspectiveFovLH(&mProj,mFov, mHeight/mWidth,mZnear,mZfar);
        projection = mProj;
        mDevice->SetTransform(D3DTS_PROJECTION, &projection);
}

void MyCamera::Setup(){
        this->SetupCamera();
        this->SetupPerspective();
}
效果是黑屏

void MyCamera::Setup(){
D3DXMATRIX View;
D3DXVECTOR3 cameraPos(12.0f, 12.0f, -12.0f);
D3DXVECTOR3 cameraLookAt(0.0f, 0.0f, 0.0f);
D3DXVECTOR3 upVector(0.0f, 1.0f, 0.0f);

D3DXMatrixLookAtLH(&View, &cameraPos, &cameraLookAt, &upVector);
mDevice->SetTransform(D3DTS_VIEW, &View);

D3DXMATRIX projection;
D3DXMatrixPerspectiveFovLH(&projection,D3DX_PI * 0.5f, 8/6,1.0f,1000.0f);
mDevice->SetTransform(D3DTS_PROJECTION, &projection);
}
效果正确

参数数值检查过也没什么区别 为什么会有这种效果

lstarboy

D3DXMatrixPerspectiveFovLH(&mProj,mFov, mHeight/mWidth,mZnear,mZfar);
中应为mWidth/(float)mHeight, 否则为0

monkeyboi

[em10]

monkeyboi

原来是这错了 小事害死人啊