Issue using cursor script with orthographic camera regarding co-ordinates (SOLVED)

deep_M · March 16, 2020, 9:32pm

Hi,

I’m using the cursor script together with the orthographic camera , and I’m having some issues.

(0,0) as picked by the cursor is different from the (0,0) for any game object I place. (0,0) for any game object is at the center of the screen whereas that shown by the cursor is the lower-left corner.

How do I change (0,0) picked by the cursor to the center of the screen? Any and all help is very much appreciated. Thanks.

britzl · March 16, 2020, 5:29am

You will have to pass translated input data to the cursor script as described here: https://github.com/britzl/defold-input/blob/master/in/cursor.md#input-handling

Use the screen_to_world() function of the camera to translate screen coordinates and then send them to the cursor script.

Let me know if you get stuck on this and I’ll try to create an example for you to check out.

notbadgun · March 16, 2020, 11:35am

We need an example. Thank you!

britzl · March 16, 2020, 12:30pm

Added a new example to the repo. The important bit is this:

github.com

britzl/defold-input/blob/master/examples/cursor_and_camera/controller.script#L11-L17


function on_input(self, action_id, action)
	local screen = vmath.vector3(action.x, action.y, 0)
	local world = camera.screen_to_world(CAMERA_ID, screen)
	action.x = world.x
	action.y = world.y
	msg.post("#cursor", "input", { action_id = action_id, action = action })
end

Here we take the on_input action.x and y and convert the coordinate from screen to translated world space and then pass that on to the cursor script. The HTML5 example is also update:

https://britzl.github.io/Defold-Input/

deep_M · March 16, 2020, 1:00pm

Thank you for showing the way. Think I figured it out.