C# World to Screen
So I use C# for my hack, and want to implement a world to screen function, since many cool things can be used with it. I found this function (in C++) on (insert unnamed forum here)
I just want to know if this function is an actual working function before I translate it into C# for my own code.
Also, if anyone cares to PM me or just comment on the math behind this, I would love to know. I have just finished Geometry last semester and I am taking College Algebra/Pre-Calc dual enrollment next year, so I should be able to understand it if someone explains. I know of the tutorial for COD4, but it is rather lengthy and too visual for my liking.
Thanks.
Code:
bool WorldToScreen( const Vector &vecOrigin, Vector &vecScreen, float *pflViewMatrix )
{
vecScreen[ 0 ] = pflViewMatrix[ 0 ] * vecOrigin[ 0 ] + pflViewMatrix[ 1 ] * vecOrigin[ 1 ] + pflViewMatrix[ 2 ] * vecOrigin[ 2 ] + pflViewMatrix[ 3 ];
vecScreen[ 1 ] = pflViewMatrix[ 4 ] * vecOrigin[ 0 ] + pflViewMatrix[ 5 ] * vecOrigin[ 1 ] + pflViewMatrix[ 6 ] * vecOrigin[ 2 ] + pflViewMatrix[ 7 ];
auto flTemp = pflViewMatrix[ 12 ] * vecOrigin[ 0 ] + pflViewMatrix[ 13 ] * vecOrigin[ 1 ] + pflViewMatrix[ 14 ] * vecOrigin[ 2 ] + pflViewMatrix[ 15 ];
if( flTemp < 0.01f )
return false;
auto invFlTemp = 1.f / flTemp;
vecScreen[ 0 ] *= invFlTemp;
vecScreen[ 1 ] *= invFlTemp;
static int iResolution[ 2 ] = { 0 };
if( !iResolution[ 0 ] || !iResolution[ 1 ] )
{
iResolution[ 0 ] = Overlay::COverlay::GetInstance( )->GetWidth( );
iResolution[ 1 ] = Overlay::COverlay::GetInstance( )->GetHeight( );
}
auto x = ( float )iResolution[ 0 ] / 2.f;
auto y = ( float )iResolution[ 1 ] / 2.f;
x += 0.5f * vecScreen[ 0 ] * ( float )iResolution[ 0 ] + 0.5f;
y -= 0.5f * vecScreen[ 1 ] * ( float )iResolution[ 1 ] + 0.5f;
vecScreen[ 0 ] = x;
vecScreen[ 1 ] = y;
return true;
}
Also, if anyone cares to PM me or just comment on the math behind this, I would love to know. I have just finished Geometry last semester and I am taking College Algebra/Pre-Calc dual enrollment next year, so I should be able to understand it if someone explains. I know of the tutorial for COD4, but it is rather lengthy and too visual for my liking.
Thanks.
