bevy_motiongfx 0.1.0

An implementation of the MotionGfx framework for Bevy.
Documentation 
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

use bevy_app::prelude::*;
use bevy_ecs::prelude::*;
use bevy_time::prelude::*;

use crate::MotionGfxSet;
use crate::world::{MotionGfxWorld, TimelineId};

pub struct ControllerPlugin;

impl Plugin for ControllerPlugin {
    fn build(&self, app: &mut App) {
        app.add_systems(
            PostUpdate,
            realtime_player_timing.in_set(MotionGfxSet::Controller),
        );
    }
}

fn realtime_player_timing(
    mut motiongfx: ResMut<MotionGfxWorld>,
    q_timelines: Query<(&TimelineId, &RealtimePlayer)>,
    time: Res<Time>,
) {
    for (id, player) in
        q_timelines.iter().filter(|(_, p)| p.is_playing)
    {
        if let Some(timeline) = motiongfx.get_timeline_mut(id) {
            let target_time = timeline.target_time()
                + player.time_scale * time.delta_secs();

            timeline.set_target_time(target_time);
        }
    }
}

/// A minimal controller for a [`Timeline`] that increments the target
/// time based on Bevy's [`Time::delta_secs()`].
///
/// [`Timeline`]: motiongfx::timeline::Timeline
#[derive(Component, Debug)]
pub struct RealtimePlayer {
    /// Determines if the timeline is currently playing.
    pub is_playing: bool,
    /// The time scale of the player. Set this to negative
    /// to play backwards.
    pub time_scale: f32,
}

impl RealtimePlayer {
    pub fn new() -> Self {
        Self::default()
    }

    /// Builder method for setting [`RealtimePlayer::is_playing`].
    pub fn with_playing(mut self, playing: bool) -> Self {
        self.is_playing = playing;
        self
    }

    /// Builder method for setting [`RealtimePlayer::time_scale`].
    pub fn with_time_scale(mut self, time_scale: f32) -> Self {
        self.time_scale = time_scale;
        self
    }

    /// Setter method for setting [`RealtimePlayer::is_playing`].
    pub fn set_playing(&mut self, playing: bool) -> &mut Self {
        self.is_playing = playing;
        self
    }

    /// Setter method for setting [`RealtimePlayer::time_scale`].
    pub fn set_time_scale(&mut self, time_scale: f32) -> &mut Self {
        self.time_scale = time_scale;
        self
    }
}

impl Default for RealtimePlayer {
    fn default() -> Self {
        Self {
            is_playing: false,
            time_scale: 1.0,
        }
    }
}