Determining Point in World space by point on a screen

Hello
Every point on a screen is a point with 2 coordinates x and y
Every point in 3d is a point with 3 coordinates x and y and z
I want to determine point in 3d in world space by point on a screen
i know that there is a function Camera.ScreenToWorldPoint but it
does not give me z component of the point in 3d
How can i do this?

 

How do you expect it to give you anything for the 3rd axis? It doesn't know what or where you expect it to return.

If you want it to stop at an object, use a raycast. If you want it to be at a specific distance from the camera, just make z that value.

 

This is possible because there is a Z Buffer
Z Buffer was created for delete invisible pixels
Z buffer make in possible to determine what point is visible

This is looks like it no possible but only because z buffer today we see what we have
When the resulting image drawing on screen video card use z buffer to understand what point or pixel is visible
Another example is a game Hitman code 47 in whitch player can move mouse cursor to any place of the scene
AND hitmat will shoot in this place
in hitman player can move cursor to the point on screen and hitman can shoot to close or to far
I want do the same

 

z buffer store's z component of visible point on screen!!
there is the function Camera.ScreenToWorldPoint whitch can translate screen x y coordinate and Z buffer can tell z coordinate of visible pixel

 

please help

 

https://docs.unity3d.com/Manual/SL-CameraDepthTexture.html

Otherwise, use a raycast and specify a layer mask to cast against the scene.

 

The Z Buffer is on the GPU, not the CPU, and is calculated after the CPU side game code is finished running for each frame. You could copy the last frame’s depth buffer back to the CPU, or maybe copy just a specific pixel’s value from the last frame’s depth buffer.

Or you can just do a raycast which will be cheaper and easier. (Assuming raycasting the against collision is good enough).

 

You right z buffer on the GPU side I forget this )))

 

Thank you!
You really help me
it works!!!!
Now i can determine point in world space)))