Hello, thanks for your answer, I found the solution

My calculation was not good at all.

Full explanation below

Important note, my 0,0 coordinate on three.js is always at the center of my screen in my case. Also, I use an orto camera, so I don’t need to mind z.

To translate the coordinates of a point from view A (where 0,0 is at the top left, so our screen) to view B (where 0,0 is at the center, the threejs view), we need to perform two transformations:

- Horizontal translation (x-axis)
- Vertical translation (y-axis)

#### Horizontal Translation (x-axis)

In view A, the origin (0,0) is at the top left. In view B, the origin (0,0) is at the center. To translate the x-coordinate of a point from view A to view B, we need to move the origin of view A to the center of view B.

- If (Xa, Ya) are the coordinates of a point in view A, the new coordinate Xb in view B is obtained by subtracting half of the width (W/2) from Xa.

Formula: Xb = Xa - (W/2)

#### Vertical Translation (y-axis)

Similarly, for the y-coordinate, we also need to move the origin of view A to the center of view B. However, note that the y-coordinates *increase downwards in view A, but in view B, they increase upwards* from the center.

- To translate the y-coordinate, we need to subtract Ya from half of the height (H/2).

Formula: Yb = (H/2) - Ya

And I use the coordinate like that without `unproject`

or `project`

.

```
const calcx = pixelX - (window.innerWidth / 2) ;
const calcy = (window.innerHeight / 2) - pixelY;
for (let i = 0; i < 50; i++) {
const emojiMesh = new THREE.Mesh(emojiGeometry, emojiMaterial);
emojiMesh.position.set(calcx, calcy, -1);
.......
}
```