mesh_primitives/
mesh_primitives.rs

1//! Mesh Primitives Demo - MeshBuilder API
2//!
3//! Demonstrates the Mesh abstraction for geometry management:
4//! - MeshBuilder API for custom geometry
5//! - Primitive generation (cube, sphere, plane, cylinder)
6//! - Vertex formats (position, normal, UV, color)
7//! - Index buffer management
8//! - Instanced rendering
9//!
10//! **Note:** This is a placeholder example demonstrating the Mesh API structure.
11//! Full rendering integration is in development.
12
13use astrelis_core::logging;
14use astrelis_render::{Color, GraphicsContext, RenderWindow, RenderWindowBuilder, wgpu};
15use astrelis_winit::{
16    FrameTime, WindowId,
17    app::{App, AppCtx, run_app},
18    event::EventBatch,
19    window::{WindowDescriptor, WinitPhysicalSize},
20};
21use std::sync::Arc;
22
23struct MeshPrimitivesDemo {
24    _context: Arc<GraphicsContext>,
25    window: RenderWindow,
26    window_id: WindowId,
27}
28
29fn main() {
30    logging::init();
31
32    run_app(|ctx| {
33        let graphics_ctx =
34            GraphicsContext::new_owned_sync().expect("Failed to create graphics context");
35
36        let window = ctx
37            .create_window(WindowDescriptor {
38                title: "Mesh Primitives Demo - Geometry API".to_string(),
39                size: Some(WinitPhysicalSize::new(1024.0, 768.0)),
40                ..Default::default()
41            })
42            .expect("Failed to create window");
43
44        let window = RenderWindowBuilder::new()
45            .color_format(wgpu::TextureFormat::Bgra8UnormSrgb)
46            .with_depth_default()
47            .build(window, graphics_ctx.clone())
48            .expect("Failed to create render window");
49
50        let window_id = window.id();
51
52        println!("\n═══════════════════════════════════════════════════════");
53        println!("  📐 MESH PRIMITIVES DEMO - Geometry API");
54        println!("═══════════════════════════════════════════════════════");
55        println!("\n  MESH API FEATURES:");
56        println!("    • MeshBuilder for custom geometry");
57        println!("    • Primitive generation (cube, sphere, plane, etc.)");
58        println!("    • Flexible vertex formats (Position, Normal, UV, Color)");
59        println!("    • Index buffer optimization");
60        println!("    • Instanced rendering support");
61        println!("\n  EXAMPLE PRIMITIVES:");
62        println!("    • Cube - box with 24 vertices (6 faces × 4 vertices)");
63        println!("    • Sphere - tessellated sphere with UV mapping");
64        println!("    • Plane - quad with optional subdivisions");
65        println!("    • Cylinder - sides + caps");
66        println!("    • Custom - arbitrary vertex/index data");
67        println!("\n  Mesh API Usage:");
68        println!("    let mesh = MeshBuilder::new()");
69        println!("        .with_positions(vertices)");
70        println!("        .with_normals(normals)");
71        println!("        .with_uvs(uvs)");
72        println!("        .with_indices(indices)");
73        println!("        .build(&ctx);");
74        println!("    mesh.draw(&mut pass);");
75        println!("    mesh.draw_instanced(&mut pass, instance_count);");
76        println!("═══════════════════════════════════════════════════════\n");
77
78        tracing::info!("Mesh primitives demo initialized");
79
80        Box::new(MeshPrimitivesDemo {
81            _context: graphics_ctx,
82            window,
83            window_id,
84        })
85    });
86}
87
88impl App for MeshPrimitivesDemo {
89    fn update(&mut self, _ctx: &mut AppCtx, _time: &FrameTime) {}
90
91    fn render(&mut self, _ctx: &mut AppCtx, window_id: WindowId, events: &mut EventBatch) {
92        if window_id != self.window_id {
93            return;
94        }
95
96        events.dispatch(|event| {
97            if let astrelis_winit::event::Event::WindowResized(size) = event {
98                self.window.resized(*size);
99                astrelis_winit::event::HandleStatus::consumed()
100            } else {
101                astrelis_winit::event::HandleStatus::ignored()
102            }
103        });
104
105        let Some(frame) = self.window.begin_frame() else {
106            return; // Surface not available
107        };
108        {
109            let _pass = frame
110                .render_pass()
111                .clear_color(Color::from_rgb_u8(20, 30, 40))
112                .label("mesh_primitives_pass")
113                .build();
114        }
115        // Frame auto-submits on drop
116    }
117}
mesh_primitives/mesh_primitives.rs

mesh_primitives/
mesh_primitives.rs
