bracket-terminal 0.8.7

ASCII/Codepage 437 terminal emulator with a game loop. Defaults to OpenGL, also support WebGPU (for Vulkan/Metal/WGPU), Curses and Crossterm for output. Part of the bracket-lib family.
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

// Vertex shader

struct VertexInput {
    @location(0) position: vec3<f32>,
    @location(1) fg: vec4<f32>,
    @location(2) bg: vec4<f32>,
    @location(3) tex_coords: vec2<f32>,
    @location(4) rotate: vec3<f32>,
    @location(5) scale: vec2<f32>,
};

struct VertexOutput{
    @builtin(position) clip_position: vec4<f32>,
    @location(0) fg: vec4<f32>,
    @location(1) bg: vec4<f32>,
    @location(2) tex_coords: vec2<f32>,
};

fn r2d(a:f32) -> mat2x2<f32> {
	let c : f32 = cos(a);
    let s : f32 = sin(a);
    return mat2x2<f32>(
        vec2<f32>(c, s),
        vec2<f32>(-s, c)
    );
}

@vertex
fn vs_main(
    model: VertexInput,
) -> VertexOutput {
    let rot : f32 = model.rotate.x;
    let center_pos : vec2<f32> = model.rotate.yz;
    var base_pos : vec2<f32> = model.position.xy - center_pos;
    base_pos = base_pos * r2d(rot);
    base_pos = base_pos * model.scale;
    base_pos = base_pos + center_pos;

    var out: VertexOutput;
    out.clip_position = vec4<f32>(base_pos, 0.0, 1.0);
    out.fg = model.fg;
    out.bg = model.bg;
    out.tex_coords = vec2<f32>(model.tex_coords.x, model.tex_coords.y);

    return out;
}

// Fragment shader

@group(0)
@binding(0)
var t_font: texture_2d<f32>;
@group(0)
@binding(1)
var s_font: sampler;

@fragment
fn fs_main(in: VertexOutput) -> @location(0) vec4<f32> {
    let original : vec4<f32> = textureSample(t_font, s_font, in.tex_coords);
    if ((original.r > 0.1 || original.g > 0.1 || original.b > 0.1) && original.a > 0.1) {
        return original * in.fg;
    } else {
        return in.bg;
    }
}