How to use Varjo Marker?

[bgyang]

How to specify markerobject?

[sweetluna]

Hi bgyang,

You could check out our C++ VR Template sample that already implements basic example of using Marker Objects in GuiSample.cpp class.
But essentially you would do something like this:
1. Enable setMarkerTrackingEnabled
2. In update get number of currently active Markers with getMarkerObjectNum
3. Iterate through each of them with getMarkerObject

Here a little code snippet from C++ VR Template that already object transformations and colors based on the size of the marker:

// Note that app in this case is Varjo plugin's instance: Unigine::Plugins::Varjo::get()
int num = app->getMarkerObjectNum();
if (num > 0)
{
	Math::vec4 colors[3] = { Math::vec4_green, Math::vec4_blue, Math::vec4_red };

	for (int i = 0; i < num; i++)
	{
		const auto &obj = app->getMarkerObject(i);

		Mat4 transform = obj.transform;
		Vec3 size = obj.size;
		size.y = (size.x + size.z) * 0.1f;

		// There are up to 3 supported marker sizes
		// - Small (up to 0.5m)
		// - Medium (up to 1m)
		// - Large (up to 3m)
		int index = Math::clamp((obj.id / 100) - 1, 0, 2);
		Scalar scale = Scalar(0.01 * (index + 1));

		Visualizer::renderBox(vec3(size), transform, colors[index], 0.0f, false);
		Visualizer::renderDirection(transform.getTranslate(), vec3(transform.getAxisX() * scale), Math::vec4_red, 0.1f, false);
		Visualizer::renderDirection(transform.getTranslate(), vec3(transform.getAxisY() * scale), Math::vec4_green, 0.1f, false);
		Visualizer::renderDirection(transform.getTranslate(), vec3(transform.getAxisZ() * scale), Math::vec4_blue, 0.1f, false);
	}
}

I hope this will help.