/**
* @brief Recalculates zoom parameters
*/
void MapWindow::Zoom::ModifyMapScale()
{
if(_scale == *_requestedScale)
return;
// limit zoomed in so doesn't reach silly levels
*_requestedScale = LimitMapScale(*_requestedScale); // FIX VENTA remove limit
_scaleOverDistanceModify = *_requestedScale / DISTANCEMODIFY;
_resScaleOverDistanceModify = GetMapResolutionFactor() / _scaleOverDistanceModify;
_drawScale = _scaleOverDistanceModify;
_drawScale = _drawScale / 111194;
_drawScale = GetMapResolutionFactor() / _drawScale;
_invDrawScale = 1.0 / _drawScale;
_scale = *_requestedScale;
}
void MapWindow::Zoom::ModifyMapScale()
{
// limit zoomed in so doesn't reach silly levels
if(_bMapScale)
*_requestedScale = LimitMapScale(*_requestedScale); // FIX VENTA remove limit
_scaleOverDistanceModify = *_requestedScale / DISTANCEMODIFY;
LKASSERT(_scaleOverDistanceModify!=0);
_resScaleOverDistanceModify = GetMapResolutionFactor() / _scaleOverDistanceModify;
_drawScale = _scaleOverDistanceModify;
_drawScale = _drawScale / 111194;
LKASSERT(_drawScale!=0);
_drawScale = GetMapResolutionFactor() / _drawScale;
_invDrawScale = 1.0 / _drawScale;
_scale = *_requestedScale;
_realscale = *_requestedScale/DISTANCEMODIFY/1000;
}
fixed
MapWindowProjection::CalculateMapScale(unsigned scale) const
{
assert(scale < ScaleListCount);
return fixed(ScaleList[scale]) *
GetMapResolutionFactor() / Layout::Scale(GetScreenWidth());
}
double MapWindow::StepMapScale(int Step){
if (abs(Step)>=4) {
ScaleCurrent += Step/4;
} else {
ScaleCurrent += Step;
}
ScaleCurrent = max(0,min(ScaleListCount-1, ScaleCurrent));
return((ScaleList[ScaleCurrent]*GetMapResolutionFactor())
/(IBLSCALE(/*Appearance.DefaultMapWidth*/ MapRect.right)));
}
double MapWindow::FindMapScale(double Value){
int i;
double BestFit = 99999;
int BestFitIdx=-1;
double DesiredScale =
(Value*IBLSCALE(/*Appearance.DefaultMapWidth*/ MapRect.right))/GetMapResolutionFactor();
LKASSERT(DesiredScale!=0);
for (i=0; i<ScaleListCount; i++){
double err = fabs(DesiredScale - ScaleList[i])/DesiredScale;
if (err < BestFit){
BestFit = err;
BestFitIdx = i;
}
}
if (BestFitIdx != -1){
ScaleCurrent = BestFitIdx;
return((ScaleList[ScaleCurrent]*GetMapResolutionFactor())
/IBLSCALE(/*Appearance.DefaultMapWidth*/ MapRect.right));
}
return(Value);
}
unsigned
MapWindowProjection::FindMapScale(const fixed Value) const
{
unsigned DesiredScale = Value *
Layout::Scale(GetScreenWidth()) / GetMapResolutionFactor();
unsigned i;
for (i = 0; i < ScaleListCount; i++) {
if (DesiredScale < ScaleList[i]) {
if (i == 0)
return 0;
return i - (DesiredScale < (ScaleList[i] + ScaleList[i - 1]) / 2);
}
}
return ScaleListCount - 1;
}
void MapWindow::FillScaleListForEngineeringUnits(void)
{
int i;
// Fill up discrete map scales
// Consider scalelist size!!!
switch (Units::GetUserDistanceUnit()) {
default:
ScaleListCount = 0;
ScaleList[ScaleListCount++] = 0.01; // km
ScaleList[ScaleListCount++] = 0.015;
ScaleList[ScaleListCount++] = 0.025;
ScaleList[ScaleListCount++] = 0.040;
ScaleList[ScaleListCount++] = 0.070;
ScaleList[ScaleListCount++] = 0.1;
ScaleList[ScaleListCount++] = 0.15;
ScaleList[ScaleListCount++] = 0.2;
ScaleList[ScaleListCount++] = 0.35;
ScaleList[ScaleListCount++] = 0.5;
ScaleList[ScaleListCount++] = 0.75;
ScaleList[ScaleListCount++] = 1.0;
ScaleList[ScaleListCount++] = 1.5;
ScaleList[ScaleListCount++] = 2.0;
ScaleList[ScaleListCount++] = 3.5;
ScaleList[ScaleListCount++] = 5.0;
ScaleList[ScaleListCount++] = 7.5;
ScaleList[ScaleListCount++] = 10.0;
ScaleList[ScaleListCount++] = 15.0;
ScaleList[ScaleListCount++] = 20.0;
ScaleList[ScaleListCount++] = 25.0;
ScaleList[ScaleListCount++] = 40.0;
ScaleList[ScaleListCount++] = 50.0;
ScaleList[ScaleListCount++] = 75.0;
break;
case unStatuteMiles:
ScaleListCount = 0;
ScaleList[ScaleListCount++] = 50.0 * (0.0006214 / 3.281); // to ft;
ScaleList[ScaleListCount++] = 80.0 * (0.0006214 / 3.281); // to ft
ScaleList[ScaleListCount++] = 130.0 * (0.0006214 / 3.281); // to ft
ScaleList[ScaleListCount++] = 200.0 * (0.0006214 / 3.281); // to ft
ScaleList[ScaleListCount++] = 350.0 * (0.0006214 / 3.281); // to ft
ScaleList[ScaleListCount++] = 500.0 * (0.0006214 / 3.281); // to ft
ScaleList[ScaleListCount++] = 800.0 * (0.0006214 / 3.281); // to ft
ScaleList[ScaleListCount++] = 0.2;
ScaleList[ScaleListCount++] = 0.35;
ScaleList[ScaleListCount++] = 0.5;
ScaleList[ScaleListCount++] = 0.75;
ScaleList[ScaleListCount++] = 1.0;
ScaleList[ScaleListCount++] = 1.5;
ScaleList[ScaleListCount++] = 2.0;
ScaleList[ScaleListCount++] = 3.5;
ScaleList[ScaleListCount++] = 5.0;
ScaleList[ScaleListCount++] = 7.5;
ScaleList[ScaleListCount++] = 10.0;
ScaleList[ScaleListCount++] = 15.0;
ScaleList[ScaleListCount++] = 20.0;
ScaleList[ScaleListCount++] = 25.0;
ScaleList[ScaleListCount++] = 40.0;
break;
case unNauticalMiles:
ScaleListCount = 0;
ScaleList[ScaleListCount++] = 50.0 * (0.00053996 / 3.281); // to ft;
ScaleList[ScaleListCount++] = 100.0 * (0.00053996 / 3.281); // to ft;
ScaleList[ScaleListCount++] = 150.0 * (0.00053996 / 3.281); // to ft
ScaleList[ScaleListCount++] = 250.0 * (0.00053996 / 3.281); // to ft
ScaleList[ScaleListCount++] = 400.0 * (0.00053996 / 3.281); // to ft
ScaleList[ScaleListCount++] = 600.0 * (0.00053996 / 3.281); // to ft
ScaleList[ScaleListCount++] = 900.0 * (0.00053996 / 3.281); // to ft
ScaleList[ScaleListCount++] = 0.2;
ScaleList[ScaleListCount++] = 0.35;
ScaleList[ScaleListCount++] = 0.5;
ScaleList[ScaleListCount++] = 0.75;
ScaleList[ScaleListCount++] = 1.0;
ScaleList[ScaleListCount++] = 1.5;
ScaleList[ScaleListCount++] = 2.0;
ScaleList[ScaleListCount++] = 3.5;
ScaleList[ScaleListCount++] = 5.0;
ScaleList[ScaleListCount++] = 7.5;
ScaleList[ScaleListCount++] = 10.0;
ScaleList[ScaleListCount++] = 15.0;
ScaleList[ScaleListCount++] = 20.0;
ScaleList[ScaleListCount++] = 25.0;
ScaleList[ScaleListCount++] = 40.0;
break;
} //sw units
double scalefactor = (double)GetMapResolutionFactor() / (double)IBLSCALE(/*Appearance.DefaultMapWidth*/ MapRect.right) * 1.4;
for (i=0; i<ScaleListCount; i++) ScaleList[i] /= scalefactor;
}
double
WindowProjection::GetMapScale() const
{
return DistancePixelsToMeters(GetMapResolutionFactor());
}
fixed
Projection::GetMapScale() const
{
return fixed(GetMapResolutionFactor()) / scale;
}
double MapWindow::GetApproxScreenRange() {
return (zoom.Scale() * max(DrawRect.right-DrawRect.left,
DrawRect.bottom-DrawRect.top))
*1000.0/GetMapResolutionFactor();
}
double DistanceScreenToUser(const unsigned x) const {
return x*MapScale/GetMapResolutionFactor();
}
double RequestDistancePixelsToMeters(const double x) const {
return x*_RequestedMapScale/(DISTANCEMODIFY*GetMapResolutionFactor());
}
gcc_pure
fixed DistanceScreenToUser(const int x) const {
return x * MapScale / GetMapResolutionFactor();
}
gcc_pure
fixed RequestDistancePixelsToMeters(const int x) const {
return x * _RequestedMapScale / Units::ToUserUnit(fixed(GetMapResolutionFactor()),
Units::DistanceUnit);
}
void
MapWindowProjection::SetMapScale(const fixed x)
{
SetScale(fixed(GetMapResolutionFactor()) / LimitMapScale(x));
}
