Hello Marco, thank you for your friendly and helpful reply!
On Friday 30 September 2011, 17:02:22, Marco Hugentobler
<marco.hugentob...@sourcepole.ch> wrote:
> The class QgsMapToPixel (src/core/qgsmaptopixel.cpp/.h) contains the
> transformation from map to pixel coordinates. Is this what you are looking
> for?
I'm 98% positive that yes, this is what I was looking for. One last
confirmation, through:
---%<---
QgsPoint QgsMapToPixel::toMapPoint( double x, double y ) const
{
double mx = x * mMapUnitsPerPixel + xMin;
double my = -1 * (( y - yMax ) * mMapUnitsPerPixel - yMin );
return QgsPoint( mx, my );
}
--->%---
Is this everything that QGis does to transform a POINT(long, lat) to a Pixel-
Point(x, y)? Because this is kind of what my naive approach (or what I thought
it was) looked like, i.e., scaling factor plus correction of the counting
direction.
Eric
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