earths 0.0.1

High-fidelity Earth simulation engine — orbit, atmosphere, geology, hydrology, biosphere, terrain, lighting, rendering, satellites, and temporal systems with full scientific coupling
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

use sciforge::hub::prelude::constants::EARTH_RADIUS;
pub struct ShaderData {
    pub name: String,
    pub uniforms: Vec<ShaderUniform>,
}
#[derive(Debug, Clone)]
pub enum UniformValue {
    Float(f32),
    Vec3([f32; 3]),
    Vec4([f32; 4]),
    Mat4([[f32; 4]; 4]),
    Int(i32),
}
#[derive(Debug, Clone)]
pub struct ShaderUniform {
    pub name: String,
    pub value: UniformValue,
}
impl ShaderData {
    pub fn terrain() -> Self {
        Self {
            name: "terrain_pbr".to_string(),
            uniforms: vec![
                ShaderUniform {
                    name: "u_sun_direction".into(),
                    value: UniformValue::Vec3([0.0, 1.0, 0.0]),
                },
                ShaderUniform {
                    name: "u_camera_pos".into(),
                    value: UniformValue::Vec3([0.0, 0.0, 0.0]),
                },
                ShaderUniform {
                    name: "u_planet_radius".into(),
                    value: UniformValue::Float(EARTH_RADIUS as f32),
                },
                ShaderUniform {
                    name: "u_atmosphere_height".into(),
                    value: UniformValue::Float(100_000.0),
                },
            ],
        }
    }
    pub fn atmosphere() -> Self {
        Self {
            name: "atmosphere_scattering".to_string(),
            uniforms: vec![
                ShaderUniform {
                    name: "u_rayleigh_coeff".into(),
                    value: UniformValue::Vec3([5.5e-6, 13.0e-6, 22.4e-6]),
                },
                ShaderUniform {
                    name: "u_mie_coeff".into(),
                    value: UniformValue::Float(21e-6),
                },
                ShaderUniform {
                    name: "u_mie_g".into(),
                    value: UniformValue::Float(0.76),
                },
                ShaderUniform {
                    name: "u_sun_intensity".into(),
                    value: UniformValue::Float(22.0),
                },
                ShaderUniform {
                    name: "u_scale_height_rayleigh".into(),
                    value: UniformValue::Float(8500.0),
                },
                ShaderUniform {
                    name: "u_scale_height_mie".into(),
                    value: UniformValue::Float(1200.0),
                },
            ],
        }
    }
    pub fn ocean() -> Self {
        Self {
            name: "ocean_surface".to_string(),
            uniforms: vec![
                ShaderUniform {
                    name: "u_wind_speed".into(),
                    value: UniformValue::Float(10.0),
                },
                ShaderUniform {
                    name: "u_wave_amplitude".into(),
                    value: UniformValue::Float(1.5),
                },
                ShaderUniform {
                    name: "u_deep_color".into(),
                    value: UniformValue::Vec3([0.01, 0.03, 0.08]),
                },
                ShaderUniform {
                    name: "u_shallow_color".into(),
                    value: UniformValue::Vec3([0.05, 0.15, 0.20]),
                },
                ShaderUniform {
                    name: "u_fresnel_power".into(),
                    value: UniformValue::Float(5.0),
                },
            ],
        }
    }
}