本文整理汇总了C++中ocpnDC::StrokePolygon方法的典型用法代码示例。如果您正苦于以下问题：C++ ocpnDC::StrokePolygon方法的具体用法？C++ ocpnDC::StrokePolygon怎么用？C++ ocpnDC::StrokePolygon使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类ocpnDC的用法示例。
在下文中一共展示了ocpnDC::StrokePolygon方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: RenderSegment
void Route::RenderSegment( ocpnDC& dc, int xa, int ya, int xb, int yb, ViewPort &VP,
bool bdraw_arrow, int hilite_width )
{
// Get the dc boundary
int sx, sy;
dc.GetSize( &sx, &sy );
// Try to exit early if the segment is nowhere near the screen
wxRect r( 0, 0, sx, sy );
wxRect s( xa, ya, 1, 1 );
wxRect t( xb, yb, 1, 1 );
s.Union( t );
if( !r.Intersects( s ) ) return;
// Clip the line segment to the dc boundary
int x0 = xa;
int y0 = ya;
int x1 = xb;
int y1 = yb;
// If hilite is desired, use a Native Graphics context to render alpha colours
// That is, if wxGraphicsContext is available.....
if( hilite_width ) {
if( Visible == cohen_sutherland_line_clip_i( &x0, &y0, &x1, &y1, 0, sx, 0, sy ) ) {
wxPen psave = dc.GetPen();
wxColour y = GetGlobalColor( _T ( "YELO1" ) );
wxColour hilt( y.Red(), y.Green(), y.Blue(), 128 );
wxPen HiPen( hilt, hilite_width, wxSOLID );
dc.SetPen( HiPen );
dc.StrokeLine( x0, y0, x1, y1 );
dc.SetPen( psave );
dc.StrokeLine( x0, y0, x1, y1 );
}
} else {
if( Visible == cohen_sutherland_line_clip_i( &x0, &y0, &x1, &y1, 0, sx, 0, sy ) )
dc.StrokeLine( x0, y0, x1, y1 );
}
if( bdraw_arrow ) {
// Draw a direction arrow
double theta = atan2( (double) ( yb - ya ), (double) ( xb - xa ) );
theta -= PI / 2;
wxPoint icon[10];
double icon_scale_factor = 100 * VP.view_scale_ppm;
icon_scale_factor = fmin ( icon_scale_factor, 1.5 ); // Sets the max size
icon_scale_factor = fmax ( icon_scale_factor, .10 );
// Get the absolute line length
// and constrain the arrow to be no more than xx% of the line length
double nom_arrow_size = 20.;
double max_arrow_to_leg = .20;
double lpp = sqrt( pow( (double) ( xa - xb ), 2 ) + pow( (double) ( ya - yb ), 2 ) );
double icon_size = icon_scale_factor * nom_arrow_size;
if( icon_size > ( lpp * max_arrow_to_leg ) ) icon_scale_factor = ( lpp * max_arrow_to_leg )
/ nom_arrow_size;
for( int i = 0; i < 7; i++ ) {
int j = i * 2;
double pxa = (double) ( s_arrow_icon[j] );
double pya = (double) ( s_arrow_icon[j + 1] );
pya *= icon_scale_factor;
pxa *= icon_scale_factor;
double px = ( pxa * sin( theta ) ) + ( pya * cos( theta ) );
double py = ( pya * sin( theta ) ) - ( pxa * cos( theta ) );
icon[i].x = (int) ( px ) + xb;
icon[i].y = (int) ( py ) + yb;
}
wxPen savePen = dc.GetPen();
dc.SetPen( *wxTRANSPARENT_PEN );
dc.StrokePolygon( 6, &icon[0], 0, 0 );
dc.SetPen( savePen );
}
}