Hello, sorry for my english skill.
I made own local coordinate system. It make only get XY from bounding box surface.https://www.babylonjs-playground.com/#BYUN2F
on the contrary, I can’t translate local XY to world position and normal vector (Pick info). I think it need raycast but when I move camera position, it broken.
https://www.babylonjs-playground.com/#BYUN2F#1
How can I get world position and normal vector?
I am sorry, I am not sure to understand exactly what you are trying to achieve.
Maybe the Framing Behavior of the camera would work here ??? Apply Camera Behaviors - Babylon.js Documentation
Hey deadcat, do you know about BJS createDecal() ? Use decals - Babylon.js Documentation playground demo ]
Maybe that will make your decal-work… easier? Not sure.
Sorry, I need pick mesh, convert to local XY (It’s done)
but input local XY, convert to pick info
Sorry for my english again
yeap I work with decal already but my boss need picking point to local XY and if change local XY, need decal moving
1 Like
Is it not just a projection of the pickedPoint (world space) to the local system of the mesh. Basically multiplying the vector by the matrix ?
You could use Vector.TransformCoordinates for that then you could use your switch to isolate your desired xy.
About normal you can use pickingInfo.getNormal to find them at the collision point.
A possibly interesting demo: https://www.babylonjs-playground.com/#2C8LVE#24
Replace monkey model with red disk, or replace with little plane with red-circle texture on transparent background.
? shrug.
This is fun, having morning e-coffee with my friend and fellow forum helper… Sebavan… and my new friend deadcat. (Wingnut offers cinnamin buns)
Yeah, pickResult/pickInfo objects have LOTS of useful properties on them. Handy.
I love cinnamon buns and there are not in France (a shame !!!) but having a coffee and cookies as well (probably a bit of topic but I think that not having cinnamon buns was worth sharing
if I get picking info from localXY, I get normal and world position, but how
For example,
when this condition, my local X matched box’s front-top edge, local Y matched box’s left-top edge.https://www.babylonjs-playground.com/#BYUN2F#2 )
so, I have some local XY, { x: 300, y: 800 }, can I convert this to picking info?
camera can panning, zooming
deadcat
August 28, 2019, 12:28pm
10
Thank’s for interesting link Wingnut, you already my friend (and I really need coffee and cinnamon buns)
but I can’t get pick info
sebavan
August 28, 2019, 12:28pm
11
The main thing is what do you want to achieve with those coordinates ? it might help finding the appropriate solution.
deadcat
August 28, 2019, 12:37pm
12
this is my project screen.
(camera only can move panning and zoomming)
that is done. already Babylon.js Playground line 24)
but vice versa, fill input filed local XY, how can I get picking info for create decal?
sebavan
August 28, 2019, 12:58pm
13
I guess you want to project: World coordinates to screen XY
http://jsfiddle.net/gwenaelhagenmuller/fwd5Y/
the vector3 project functions converts from 3d space coordinates to screen ones
thank you for your answer.
that link is point to local XY. that is already done,
http://jsfiddle.net/gwenaelhagenmuller/fwd5Y/ explains how to use project to find screen coordinates between 0 and 1.
Then if you multiply by the screenSize, you can use pick again to do the same code than with the mouse.
Thank you for your answer, I check that code next day!
with camera panning, zooming
)
(that is 