Function viewport_pointer

perro_editor/res/scripts/scene/editor_viewport.rs:422–460

(
    ctx: &mut ScriptContext<'_, API>,
)

                y: point.y,
                z: point.z,
            },
        ) {
            rebuild_preview(ctx);
        }
        refresh_all(ctx);
    }
    changed
}

pub fn snap_vec2(value: Vector2, grid: f32) -> Vector2 {
    Vector2::new(
        (value.x / grid).round() * grid,
        (value.y / grid).round() * grid,
    )
}

pub fn snap_vec3(value: Vector3, grid: f32) -> Vector3 {
    Vector3::new(
        (value.x / grid).round() * grid,
        (value.y / grid).round() * grid,
        (value.z / grid).round() * grid,
    )
}

pub fn snap_f32(value: f32, grid: f32) -> f32 {
    if grid <= 0.0 {
        value
    } else {
        (value / grid).round() * grid
    }
}

pub fn ray_ground_point(ray: ViewportRay3D) -> Option<Vector3> {
    if ray.direction.y.abs() < 0.0001 {
        return None;
    }
    let t = -ray.origin.y / ray.direction.y;
    if !t.is_finite() || t < 0.0 {
        return None;
    }
    Some(ray.origin + ray.direction * t)
}