OSG_BEGIN_NAMESPACE
OSG_BASE_DLLMAPPING bool MatrixOrthogonal(OSG::Matrix &result,
OSG::Real32 rLeft,
OSG::Real32 rRight,
OSG::Real32 rBottom,
OSG::Real32 rTop,
OSG::Real32 rNear,
OSG::Real32 rFar)
{
result.setValueTransposed(
2.f / (rRight - rLeft),
0.f,
0.f,
0.f,
0.f,
2.f / (rTop - rBottom),
0.f,
0.f,
0.f,
0.f,
-2.f / (rFar - rNear),
0.f,
-(rRight + rLeft ) / (rRight - rLeft ),
-(rTop + rBottom) / (rTop - rBottom),
-(rFar + rNear ) / (rFar - rNear ),
1.);
return false;
}
OSG_BASE_DLLMAPPING bool MatrixFrustum(OSG::Matrix &result,
OSG::Real32 rLeft,
OSG::Real32 rRight,
OSG::Real32 rBottom,
OSG::Real32 rTop,
OSG::Real32 rNear,
OSG::Real32 rFar)
{
Real32 dz = rFar - rNear;
Real32 dx = rRight - rLeft;
Real32 dy = rTop - rBottom;
Real32 n2 = 2.f * rNear;
result.setValueTransposed(
n2 / dx,
0.f,
0.f,
0.f,
0.f,
n2 / dy,
0.f,
0.f,
(rRight + rLeft ) / dx,
(rTop + rBottom) / dy,
-(rFar + rNear ) / dz,
-1.f,
0.f,
0.f,
-(rFar * n2) / dz,
0.f);
return false;
}