Imath::M33f Transform2DPlug::matrix( const Imath::Box2i &displayWindow, double pixelAspect ) const
{
// We need to transform from image space (with 0x0 being the bottom left)
// to Gadget space (where 0x0 is the top left). To do this, we need to know the
// size of the Format.
///\todo: We don't handle the pixel aspect of the format here but we should!
float formatHeight = displayWindow.size().y + 1;
M33f p;
V2f pivotVec = pivotPlug()->getValue();
pivotVec.y = formatHeight - pivotVec.y;
p.translate( pivotVec );
M33f t;
V2f translateVec = translatePlug()->getValue();
translateVec.y *= -1.;
t.translate( translateVec );
M33f r;
r.rotate( IECore::degreesToRadians( rotatePlug()->getValue() ) );
M33f s;
s.scale( scalePlug()->getValue() );
M33f pi;
pi.translate( pivotVec*Imath::V2f(-1.f) );
M33f result = pi * s * r * t * p;
return result;
}
Imath::M33f Transform2DPlug::matrix() const
{
M33f p;
V2f pivotVec = pivotPlug()->getValue();
p.translate( pivotVec );
M33f t;
V2f translateVec = translatePlug()->getValue();
t.translate( translateVec );
M33f r;
r.rotate( IECore::degreesToRadians( rotatePlug()->getValue() ) );
M33f s;
s.scale( scalePlug()->getValue() );
M33f pi;
pi.translate( pivotVec*Imath::V2f(-1.f) );
M33f result = pi * s * r * t * p;
return result;
}