concinnity-dev 0.19.119

The Concinnity dev tooling library: world authoring, the in-engine editor, the debug server, docs and packaging
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119

//! EditorHook: frame-selected and the short eased camera glide it (and a
//! bookmark recall) rides on. F moves the camera so the whole selection fits
//! the view; the pose math lives in `editor/viewport/framing.rs`, this drive resolves
//! the selection's world bounds and steps the interpolation.

use concinnity_core::components::{Camera3D, FrameInput, Transform};
use concinnity_core::ecs::World;
use concinnity_core::ecs::{FrameTime, PickIndex};
use concinnity_host::thread::asset_id;

use crate::editor::hook::EditorHook;
use crate::editor::hook::camera_pose;
use crate::editor::viewport::framing::{self, CameraPose};

const GLIDE_SECS: f32 = 0.25;

// An in-flight camera glide: the fixed endpoints and the seconds of frame
// time the normalized parameter is derived from.
pub(in crate::editor::hook) struct CameraGlide {
    pub(super) from: CameraPose,
    pub(super) to: CameraPose,
    pub(super) secs: f32,
}

impl EditorHook {
    // The selection's world-space bounds this frame: mesh members contribute
    // their PickIndex AABB, billboard-backed members (no geometry) their
    // seeded Transform position padded to a small box. `None` when nothing
    // resolves.
    pub(in crate::editor::hook) fn selection_bounds(
        &self,
        world: &World,
    ) -> Option<([f32; 3], [f32; 3])> {
        let index = world.resource::<PickIndex>();
        let boxes = self.selection.iter().filter_map(|handle| {
            let name = self.handle_name(handle)?;
            let id = asset_id::lookup(&name)?;
            if let Some(e) = index.and_then(|i| i.entries.iter().find(|e| e.asset_id == id)) {
                return Some((e.bb_min, e.bb_max));
            }
            let entity = super::billboard::entity_by_name(world, &name)?;
            Some(framing::pad_point(world.get::<Transform>(entity)?.position))
        });
        framing::union_bounds(boxes)
    }

    // F: glide the camera so the selection's bounding sphere fills the view,
    // keeping the current look direction. Takes the viewport rather than the
    // frame input so panel presses (which resolve without input access) can
    // frame too.
    pub(in crate::editor::hook) fn frame_selection(&mut self, vp: [f32; 2], world: &World) {
        let Some((mn, mx)) = self.selection_bounds(world) else {
            return;
        };
        let Some(cam) = world.query::<Camera3D>().next() else {
            return;
        };
        let aspect = if vp[1] > 0.0 { vp[0] / vp[1] } else { 1.0 };
        let Some(current) = camera_pose::read(world) else {
            return;
        };
        let (center, radius) = framing::bounding_sphere(mn, mx);
        let to = framing::frame_pose(
            &current,
            center,
            radius,
            cam.fov_y_degrees.to_radians(),
            aspect,
        );
        self.start_glide(current, to);
    }

    pub(in crate::editor::hook) fn start_glide(&mut self, from: CameraPose, to: CameraPose) {
        self.glide = Some(CameraGlide {
            from,
            to,
            secs: 0.0,
        });
    }

    // Step an in-flight glide, writing the camera exactly as the fly drive
    // does. Any deliberate navigation input (only live while flying) hands
    // control back immediately.
    pub(in crate::editor::hook) fn drive_glide(&mut self, input: &FrameInput, world: &mut World) {
        if self.glide.is_none() {
            return;
        }
        let steered = input.forward
            || input.backward
            || input.left
            || input.right
            || input.mouse_dx != 0.0
            || input.mouse_dy != 0.0;
        if steered {
            self.end_glide();
            return;
        }
        let dt = world
            .resource::<FrameTime>()
            .copied()
            .unwrap_or_default()
            .dt
            .max(0.0);
        let Some(glide) = &mut self.glide else {
            return;
        };
        glide.secs += dt;
        let t = glide.secs / GLIDE_SECS;
        let pose = framing::lerp_pose(&glide.from, &glide.to, framing::ease(t));
        camera_pose::write(world, &pose);
        if t >= 1.0 {
            self.end_glide();
        }
    }

    pub(super) fn end_glide(&mut self) {
        self.glide = None;
    }
}