distance from camera in shaders

[lean harness]

How to get distance from camera z position to curerrent pixel uv.y like on image?

[nova jacinth]

Hi.

[lean harness]

i think it is z-depth or smth 🙂

hi

[nova jacinth]

It's pleasure to helping you.

To calculate the distance from the camera to an object along the Z-axis in WebGL, you need to consider the camera's position and the object's position in the 3D space.

const distanceZ = cameraPosition.z - objectPosition.z;

make a sense?

[lean harness]

for now yes

but i need distance to object uv.y

is any attribute in vertex shader that gives me camera position to current uv pixel?

[nova jacinth]

I see.

Just a minutes.

hello/

hi friend.

The UV.y coordinate can be obtained from the texture coordinates of the object.

hello? If you want, plz send me DM.

okay?

[lean harness]

ok

i will try it

[nova jacinth]

thank you.

I am waiting for you now.

[lean harness]

varying float distToCamera;

void main() {
  gl_Position = projectionMatrix * viewMatrix * modelMatrix * vec4( position, 1.0 );
  vUv = uv;
  distToCamera = gl_Position.z;
}```

this one works

simpler than i thought

[nova jacinth]

that's okay.

If you have a question, you may contact me at anytime. okay?

[lean harness]

ok, thx

[nova jacinth]

But how can we contact?

[lean harness]

discord pw i guess