Add starts_from and ends_to path functionality

HexGrid.pm

@@ -140,12 +140,12 @@ sub subgrid_for_tiles($this, @coords_list)
 		my ($tile, $region) = $this->get_tile_and_region_at($coords->{nw}, $coords->{sw});
 		unless ($tile)
 		{
-			carp "No tile at " . $coords->{nw} . "," . $coords->{sw}, skipping.
+			carp "No tile at " . $coords->{nw} . "," . $coords->{sw} . ", skipping.";
 			next;
 		}
 		unless ($region)
 		{
-			carp "No region at " . $coords->{nw} . "," . $coords->{sw}, skipping.
+			carp "No region at " . $coords->{nw} . "," . $coords->{sw} . ", skipping.";
 			next;
 		}
 		unless(exists $subgrid->{regions}{$region->{name}})

HexGrid/Path.pm

@@ -15,6 +15,8 @@ has id => (is => 'ro', required => 1);
 has style => (is => 'rw', default => sub { {} });
 has colour => (is => 'rw', alias => 'color', default => 'blue');
 has css_class => (is => 'rw');
+has starts_from => (is => 'rw');
+has ends_to => (is => 'rw');
 
 # Class
 
@@ -48,24 +50,66 @@ sub render($this, $grid, $svg)
 	return unless @{$this->tiles};
 
 	my $g = $svg->g(id => $this->id, class => $this->css_class);
-	my ($x0, $x, $y0, $y);
-
 	my $current_tile = shift @{$this->tiles};
+
+	# Single tile
 	unless (@{$this->tiles})
 	{
 		my ($cx, $cy) = $grid->coords_of_centre($current_tile->nw, $current_tile->sw);
-		$g->circle(cx => $cx, cy => $cy,
-			r => $this->{style}{'stroke-width'} // $DEFAULT_WIDTH,
-			fill => $this->colour, style => $this->style, class => $this->css_class);
-		return;
+		if($this->starts_from)
+		{
+			my ($x1, $y1) = $grid->coords_of_edge($current_tile->nw, $current_tile->sw, $this->starts_from);
+			if($this->ends_to)
+			{
+				my ($x2, $y2) = $grid->coords_of_edge($current_tile->nw, $current_tile->sw, $this->ends_to);
+				# Curve from starts_from to ends_to with the centre as control point
+				$g->path(d => "M $x1,$y1 Q $cx,$cy $x2,$y2",
+					stroke => $this->colour, style => $this->style, class => $this->css_class);
+			}
+			else
+			{
+				# line from starts_from to the centre
+				$g->line(x1 => $x1, y1 => $y1, x2 => $cx, y2 => $cy,
+					stroke => $this->colour, style => $this->style, class => $this->css_class);
+			}
+		}
+		else
+		{
+			if($this->ends_to)
+			{
+				# line from the centre to ends_to
+				my ($x2, $y2) = $grid->coords_of_edge($current_tile->nw, $current_tile->sw, $this->ends_to);
+				$g->line(x1 => $cx, y1 => $cy, x2 => $x2, y2 => $y2,
+					stroke => $this->colour, style => $this->style, class => $this->css_class);
+			}
+			else
+			{
+				$g->circle(cx => $cx, cy => $cy,
+					r => $this->{style}{'stroke-width'} // $DEFAULT_WIDTH,
+					fill => $this->colour, style => $this->style, class => $this->css_class);
+			}
+		}
+		return $g;
 	}
+
+	my ($x0, $x, $y0, $y);
 	my $path_spec;
 	my $previous_tile = $current_tile;
 	$current_tile = shift @{$this->tiles};
 	my $next_edge = get_edge_direction($previous_tile, $current_tile);
-	($x0, $y0) = $grid->coords_of_centre($previous_tile->nw, $previous_tile->sw);
 	($x, $y) = $grid->coords_of_edge($previous_tile->nw, $previous_tile->sw, $next_edge);
-	$path_spec .= "M $x0,$y0 L $x,$y";
+	if($this->starts_from)
+	{
+		($x0, $y0) = $grid->coords_of_edge($previous_tile->nw, $previous_tile->sw, $this->starts_from);
+		$path_spec .= "M $x0,$y0 ";
+		my ($cx, $cy) = $grid->coords_of_centre($previous_tile->nw, $previous_tile->sw);
+		$path_spec .= curve_to($cx, $cy, $x, $y);
+	}
+	else
+	{
+		($x0, $y0) = $grid->coords_of_centre($previous_tile->nw, $previous_tile->sw);
+		$path_spec .= "M $x0,$y0 L $x,$y";
+	}
 
 	my $previous_edge; # not defined yet
 	my $next_tile; # not defined yet
@@ -84,12 +128,23 @@ sub render($this, $grid, $svg)
 		$current_tile = $next_tile;
 	}
 	# When loop is done (or if it was empty) $current_tile is the last tile
-	# $next_edge will be the last used edge, so use it's opposite for the source of last line
-	($x, $y) = $grid->coords_of_centre($current_tile->nw, $current_tile->sw);
-	$path_spec .= " L $x,$y";
+	# $next_edge is the last used edge, so use it's opposite for the source of last line
+	if($this->ends_to)
+	{
+		($x, $y) = $grid->coords_of_centre($current_tile->nw, $current_tile->sw);
+		my ($xe, $ye) = $grid->coords_of_edge($current_tile->nw, $current_tile->sw, $this->ends_to);
+		$path_spec .= curve_to($x, $y, $xe, $ye);
+	}
+	else
+	{
+		($x, $y) = $grid->coords_of_centre($current_tile->nw, $current_tile->sw);
+		$path_spec .= " L $x,$y";
+	}
+
 	$g->path(d => $path_spec, fill => 'transparent',
 		stroke => $this->colour, style => $this->style, class => $this->css_class
 	);
+	return $g;
 }
 
 1;

tests/paths.pl

@@ -8,11 +8,11 @@ use Carp;
 
 use Data::Dumper;
 
-my $MAP_SIZE = 3;
+my $MAP_SIZE = 5;
 
 my $grid = HexGrid->new(defaults => {
 		style => { 'stroke-width' => 1, stroke => 'white' },
-		show_coords => 0});
+		show_coords => 1});
 my $region = $grid->make_region("TEST");
 
 for (my $nw=-$MAP_SIZE; $nw <= $MAP_SIZE; $nw++)
@@ -23,13 +23,51 @@ for (my $nw=-$MAP_SIZE; $nw <= $MAP_SIZE; $nw++)
 	}
 }
 
+# generic "standard" path
 $grid->make_path_from('test-id',
 	[[0,0], [1,0], [1,1], [2,0], [2,-1], [2,-2], [1,-2], [1,-1], [2,-1], [3,-1]],
 	colour => 'lime', css_class => 'path', style => { 'stroke-width' => 5 }
 );
+
+
+# Single tile paths
 $grid->make_path_from('point-id', [[-1,1]],
 	colour => 'cyan', css_class => 'path', style => { 'stroke-width' => 5 }
 );
+
+$grid->add_path(HexGrid::Path->new(id => 'point-starts', tiles => [$grid->get_tile_at(-2,2)],
+		starts_from => $HexGrid::DIR{n},
+		colour => 'yellow', css_class => 'path', style => { 'stroke-width' => 5 }));
+
+$grid->add_path(HexGrid::Path->new(id => 'point-ends', tiles => [$grid->get_tile_at(-3,3)],
+		ends_to => $HexGrid::DIR{nw},
+		colour => 'blue', css_class => 'path', style => { 'stroke-width' => 5 }));
+
+$grid->add_path(HexGrid::Path->new(id => 'point-starts-ends-1', tiles => [$grid->get_tile_at(-2,3)],
+		starts_from => $HexGrid::DIR{sw}, ends_to => $HexGrid::DIR{ne},
+		colour => 'magenta', css_class => 'path', style => { 'stroke-width' => 5 }));
+
+$grid->add_path(HexGrid::Path->new(id => 'point-starts-ends-2', tiles => [$grid->get_tile_at(-1,2)],
+		starts_from => $HexGrid::DIR{sw}, ends_to => $HexGrid::DIR{n},
+		colour => 'orange', css_class => 'path', style => { 'stroke-width' => 5 }));
+
+
+# starts_from/ends_to paths
+$grid->add_path(HexGrid::Path->new(id => 'starts', starts_from => $HexGrid::DIR{ne},
+		tiles => [$grid->get_tile_at(4,-1), $grid->get_tile_at(5,-1), $grid->get_tile_at(5,0)],
+		colour => 'yellow', css_class => 'path', style => { 'stroke-width' => 5 }));
+
+$grid->add_path(HexGrid::Path->new(id => 'ends', ends_to => $HexGrid::DIR{nw},
+		tiles => [$grid->get_tile_at(4,1), $grid->get_tile_at(4,0), $grid->get_tile_at(3,1)],
+		colour => 'blue', css_class => 'path', style => { 'stroke-width' => 5 }));
+
+$grid->add_path(HexGrid::Path->new(id => 'starts-ends',
+		starts_from => $HexGrid::DIR{sw}, ends_to => $HexGrid::DIR{s},
+		tiles => [$grid->get_tile_at(2,3), $grid->get_tile_at(3,3), $grid->get_tile_at(4,3)],
+		colour => 'magenta', css_class => 'path', style => { 'stroke-width' => 5 }));
+
+
+#loop
 $grid->make_path_from('loop-id',
 	[[-2,0], [-1,0], [-1,-1], [-2,-1], [-2,0]],
 	colour => 'red', css_class => 'path', style => { 'stroke-width' => 5 }