fission-3d 0.4.1

3D scene primitives and rendering data types for Fission applications
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
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
120
121
122
123
124
125
126
127
128
129
130
131
132
133

pub mod render;
use fission_core::internal::{InternalLowerer, InternalLoweringCx, InternalRenderNode};
use fission_core::op::Color;
use fission_core::ui::{Container, Widget};

use fission_ir::op::{EmbedKind, LayoutOp};
use serde::{Deserialize, Serialize};

#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct Point3D {
    pub x: f32,
    pub y: f32,
    pub z: f32,
}

impl Point3D {
    pub fn new(x: f32, y: f32, z: f32) -> Self {
        Self { x, y, z }
    }
}

#[derive(Debug, Clone, Serialize, Deserialize)]
pub enum Primitive3D {
    Cube {
        center: Point3D,
        size: f32,
        color: Color,
    },
    Sphere {
        center: Point3D,
        radius: f32,
        color: Color,
    },
    Mesh {
        vertices: Vec<Point3D>,
        indices: Vec<u32>,
        color: Color,
    },
}

#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct Scene3D {
    pub width: Option<f32>,
    pub height: Option<f32>,
    pub primitives: Vec<Primitive3D>,
}

impl Scene3D {
    pub fn new() -> Self {
        Self {
            width: None,
            height: None,
            primitives: Vec::new(),
        }
    }

    pub fn width(mut self, w: f32) -> Self {
        self.width = Some(w);
        self
    }

    pub fn height(mut self, h: f32) -> Self {
        self.height = Some(h);
        self
    }

    pub fn add_primitive(mut self, primitive: Primitive3D) -> Self {
        self.primitives.push(primitive);
        self
    }
}

impl From<Scene3D> for Widget {
    fn from(component: Scene3D) -> Self {
        let this = &component;
        let mut container = Container::new(fission_core::internal::custom_render_widget(
            InternalRenderNode {
                debug_tag: "fission_3d::Scene3D".into(),
                lowerer: Some(std::sync::Arc::new(Scene3DInternalLowerer {
                    scene: this.clone(),
                })),
                render_object: None,
            },
        ));
        if let Some(w) = this.width {
            container = container.width(w);
        } else {
            container = container.flex_grow(1.0);
        }
        if let Some(h) = this.height {
            container = container.height(h);
        } else {
            if this.width.is_none() {
                container = container.flex_grow(1.0);
            }
        }
        container.into()
    }
}

#[derive(Debug)]
pub struct Scene3DInternalLowerer {
    pub scene: Scene3D,
}

impl InternalLowerer for Scene3DInternalLowerer {
    fn lower_dyn(&self, cx: &mut InternalLoweringCx) -> fission_ir::WidgetId {
        let node_id = cx.next_node_id();

        let w = self
            .scene
            .width
            .unwrap_or_else(|| (cx.env.viewport_size.width - 264.0).max(400.0));
        let h = self
            .scene
            .height
            .unwrap_or_else(|| (cx.env.viewport_size.height - 200.0).max(300.0));

        // In a real implementation, this would emit an EmbedKind::Surface3D
        // and fission-shell-desktop would intercept it to render a wgpu scene
        // For this milestone, we emit a 3D placeholder layout op.

        let payload = bincode::serialize(&self.scene.primitives).unwrap_or_default();
        let op = fission_ir::Op::Layout(LayoutOp::Embed {
            kind: EmbedKind::Custom(payload),
            widget_id: fission_ir::WidgetId::explicit("fission_3d_scene"),
            width: Some(w),
            height: Some(h),
        });

        cx.insert_node(node_id, op, vec![])
    }
}