callistos 0.0.3

Callisto celestial simulation crate for the MilkyWay SolarSystem workspace
Documentation 
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#[derive(Debug, Clone)]
pub enum UniformValue {
    Float(f32),
    Vec3([f32; 3]),
    Vec4([f32; 4]),
    Int(i32),
}

#[derive(Debug, Clone)]
pub struct ShaderUniform {
    pub name: &'static str,
    pub value: UniformValue,
}

pub struct ShaderEndpoint {
    pub name: &'static str,
    pub uniforms: Vec<ShaderUniform>,
}

impl ShaderEndpoint {
    pub fn terrain() -> Self {
        Self {
            name: "callisto_terrain_pbr",
            uniforms: vec![
                ShaderUniform {
                    name: "u_planet_radius",
                    value: UniformValue::Float(crate::CALLISTO_RADIUS_M as f32),
                },
                ShaderUniform {
                    name: "u_sun_direction",
                    value: UniformValue::Vec3([0.0, 1.0, 0.0]),
                },
                ShaderUniform {
                    name: "u_camera_pos",
                    value: UniformValue::Vec3([0.0, 0.0, 0.0]),
                },
                ShaderUniform {
                    name: "u_surface_temp_k",
                    value: UniformValue::Float(120.0),
                },
                ShaderUniform {
                    name: "u_ice_albedo",
                    value: UniformValue::Float(0.22),
                },
                ShaderUniform {
                    name: "u_solar_flux",
                    value: UniformValue::Float(crate::SOLAR_CONSTANT_AT_CALLISTO_W_M2 as f32),
                },
            ],
        }
    }

    pub fn exosphere() -> Self {
        Self {
            name: "callisto_co2_exosphere",
            uniforms: vec![
                ShaderUniform {
                    name: "u_co2_column_density",
                    value: UniformValue::Float(1e19),
                },
                ShaderUniform {
                    name: "u_o2_column_density",
                    value: UniformValue::Float(1e18),
                },
            ],
        }
    }

    pub fn eclipse() -> Self {
        Self {
            name: "callisto_eclipse",
            uniforms: vec![
                ShaderUniform {
                    name: "u_exposure",
                    value: UniformValue::Float(0.3),
                },
                ShaderUniform {
                    name: "u_gamma",
                    value: UniformValue::Float(2.2),
                },
                ShaderUniform {
                    name: "u_dust_intensity",
                    value: UniformValue::Float(0.02),
                },
            ],
        }
    }
}