Built in Multi-Touch Features

Feature requests
#1

built in functions for pinch zoom, rotate etc.

#2

That’s not multi-touch, that’s gesture.
You have to support them by your own.

#3

https://github.com/britzl/defold-input supports gestures

4 Likes
#4

I understand that I can implement pinch zoom etc by myself, I’m just suggesting it would be nice to have a built in function to turn it on/off and to set parameters without having to measure distances between touch points etc.

For example:

display.multitouch = true – > turn on multitouch if you are deployed to a touchscreen environment

display.minzoom = .75
display.maxzoom = 1.5
display.defaultzoom = 1
display.pinchzoom = true --> turn on pinch zooming with the default values

Just easier for users to implement out of the box.

#5

The API you suggest can be implemented on top of the Defold API quite easily. You can use the Defold-Input extension and just a little bit of code:

go.property("minzoom", 0.75)
go.property("maxzoom", 1.5)
go.property("defaultzoom", 1)

function init(self)
	self.zoom = self.defaultzoom
end

function on_input(self, action_id, action)
	local g = gesture.on_input(self, action_id, action)
	if g and g.two_finger.pinch then
		self.zoom = vmath.lerp(g.two_finger.pinch.ratio, self.minzoom, self.maxzoom)
		msg.post("@render:", "use_fixed_projection", { zoom = self.zoom })
	end
end
4 Likes
#6

Wow, thanks for the example, that looks pretty straight forward!