Method DrawContent

src/linkgraph/linkgraph_gui.cpp:297–316

* Draw one specific link. * @param pta Source of the link. * @param ptb Destination of the link. * @param cargo Properties of the link. */

 * @param cargo Properties of the link.
 */
void LinkGraphOverlay::DrawContent(Point pta, Point ptb, const LinkProperties &cargo) const
{
	uint usage_or_plan = std::min(cargo.capacity * 2 + 1, cargo.Usage());
	PixelColour colour = LinkGraphOverlay::LINK_COLOURS[_settings_client.gui.linkgraph_colours][usage_or_plan * lengthof(LinkGraphOverlay::LINK_COLOURS[0]) / (cargo.capacity * 2 + 2)];
	int width = ScaleGUITrad(this->scale);
	int dash = cargo.shared ? width * 4 : 0;

	/* Move line a bit 90° against its dominant direction to prevent it from
	 * being hidden below the grey line. */
	int side = _settings_game.vehicle.road_side ? 1 : -1;
	if (abs(pta.x - ptb.x) < abs(pta.y - ptb.y)) {
		int offset_x = (pta.y > ptb.y ? 1 : -1) * side * width;
		GfxDrawLine(pta.x + offset_x, pta.y, ptb.x + offset_x, ptb.y, colour, width, dash);
	} else {
		int offset_y = (pta.x < ptb.x ? 1 : -1) * side * width;
		GfxDrawLine(pta.x, pta.y + offset_y, ptb.x, ptb.y + offset_y, colour, width, dash);
	}

	GfxDrawLine(pta.x, pta.y, ptb.x, ptb.y, GetColourGradient(COLOUR_GREY, SHADE_DARKEST), width);
}

/**
 * Draw dots for stations into the smallmap. The dots' sizes are determined by the amount of