/*
    #version:1# (machine generated, don't edit!)

    Generated by sokol-shdc (https://github.com/floooh/sokol-tools)

    Cmdline:
        sokol-shdc -i shader_sky.glsl -o ./jai/shader_sky.jai -l glsl430:glsl300es:metal_macos -f sokol_jai

    Overview:
    =========
    Shader program: 'sky':
        Get shader desc: sky_shader_desc(sg_query_backend())
        Vertex Shader: vs_sky
        Fragment Shader: fs_sky
        Attributes:
            ATTR_sky_position => 0
    Bindings:
        Uniform block 'sky_vs_params':
            Jai struct: Sky_Vs_Params
            Bind slot: UB_sky_vs_params => 0
*/
ATTR_sky_position :: 0;
UB_sky_vs_params :: 0;
Sky_Vs_Params :: struct {
    mvp: [16]float;
};
/*
    #version 430

    uniform vec4 sky_vs_params[4];
    layout(location = 0) in vec4 position;
    layout(location = 0) out vec4 pos;

    void main()
    {
        gl_Position = mat4(sky_vs_params[0], sky_vs_params[1], sky_vs_params[2], sky_vs_params[3]) * vec4(position.xyz * 500.0, 1.0);
        pos = position;
    }

*/
vs_sky_source_glsl430 := u8.[
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];
/*
    #version 430

    layout(location = 0) in vec4 pos;
    layout(location = 0) out vec4 frag_color;

    float hash(float n)
    {
        return fract(sin(n) * 43758.546875);
    }

    float _noise(vec3 x)
    {
        vec3 _35 = fract(x);
        float _43 = dot(floor(x), vec3(1.0, 157.0, 113.0));
        float param = _43;
        float param_1 = _43 + 1.0;
        float _56 = _35.x;
        float param_2 = _43 + 157.0;
        float param_3 = _43 + 158.0;
        float _72 = _35.y;
        float param_4 = _43 + 113.0;
        float param_5 = _43 + 114.0;
        float param_6 = _43 + 270.0;
        float param_7 = _43 + 271.0;
        return mix(mix(mix(hash(param), hash(param_1), _56), mix(hash(param_2), hash(param_3), _56), _72), mix(mix(hash(param_4), hash(param_5), _56), mix(hash(param_6), hash(param_7), _56), _72), _35.z);
    }

    float fbm(inout vec3 p)
    {
        float f = 0.0;
        vec3 param = p;
        f += (_noise(param) * 0.5);
        p = (mat3(vec3(0.0, 1.60000002384185791015625, 1.2000000476837158203125), vec3(-1.60000002384185791015625, 0.7200000286102294921875, -0.959999978542327880859375), vec3(-1.2000000476837158203125, -0.959999978542327880859375, 1.2799999713897705078125)) * p) * 1.10000002384185791015625;
        vec3 param_1 = p;
        f += (_noise(param_1) * 0.25);
        p = (mat3(vec3(0.0, 1.60000002384185791015625, 1.2000000476837158203125), vec3(-1.60000002384185791015625, 0.7200000286102294921875, -0.959999978542327880859375), vec3(-1.2000000476837158203125, -0.959999978542327880859375, 1.2799999713897705078125)) * p) * 1.2000000476837158203125;
        vec3 param_2 = p;
        f += (_noise(param_2) * 0.16666667163372039794921875);
        p = (mat3(vec3(0.0, 1.60000002384185791015625, 1.2000000476837158203125), vec3(-1.60000002384185791015625, 0.7200000286102294921875, -0.959999978542327880859375), vec3(-1.2000000476837158203125, -0.959999978542327880859375, 1.2799999713897705078125)) * p) * 1.2999999523162841796875;
        vec3 param_3 = p;
        f += (_noise(param_3) * 0.083333335816860198974609375);
        p = (mat3(vec3(0.0, 1.60000002384185791015625, 1.2000000476837158203125), vec3(-1.60000002384185791015625, 0.7200000286102294921875, -0.959999978542327880859375), vec3(-1.2000000476837158203125, -0.959999978542327880859375, 1.2799999713897705078125)) * p) * 1.39999997615814208984375;
        vec3 param_4 = p;
        float _169 = f;
        float _170 = _169 + (_noise(param_4) * 0.0416666679084300994873046875);
        f = _170;
        return _170;
    }

    vec3 sky(vec3 skypos, vec3 sunpos)
    {
        float _199 = dot(normalize(skypos), normalize(sunpos));
        vec3 _202 = normalize(skypos);
        vec3 final = mix(vec3(0.3842999935150146484375, 0.81169998645782470703125, 0.956799983978271484375), vec3(0.17000000178813934326171875, 0.4000000059604644775390625, 0.949999988079071044921875), vec3(clamp(skypos.y * 2.0, 0.0, 0.699999988079071044921875))) + ((vec3(1.0) * clamp((_199 - 0.949999988079071044921875) * 10.0, 0.0, 0.800000011920928955078125)) * 0.20000000298023223876953125);
        if (_199 > 0.99989998340606689453125)
        {
            final = vec3(1.0);
        }
        float _237 = _202.y;
        final += (mix(vec3(1.0), vec3(0.0), vec3(clamp(abs(_237) * 80.0, 0.0, 1.0))) * 0.100000001490116119384765625);
        vec3 param = (_202 / vec3(_237)) * 2.0;
        float _260 = fbm(param);
        vec3 _264 = final;
        vec3 _272 = mix(_264, vec3(1.0), vec3((max(0.0, _237) * (smoothstep(0.5, 1.0, _260) * 0.300000011920928955078125)) * 2.0));
        final = _272;
        return _272;
    }

    void main()
    {
        vec3 param = normalize(pos.xyz);
        vec3 param_1 = vec3(0.485071241855621337890625, 0.72760689258575439453125, 0.485071241855621337890625);
        frag_color = vec4(sky(param, param_1), 1.0);
    }

*/
fs_sky_source_glsl430 := u8.[
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];
/*
    #version 300 es

    uniform vec4 sky_vs_params[4];
    layout(location = 0) in vec4 position;
    out vec4 pos;

    void main()
    {
        gl_Position = mat4(sky_vs_params[0], sky_vs_params[1], sky_vs_params[2], sky_vs_params[3]) * vec4(position.xyz * 500.0, 1.0);
        pos = position;
    }

*/
vs_sky_source_glsl300es := u8.[
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];
/*
    #version 300 es
    precision mediump float;
    precision highp int;

    in highp vec4 pos;
    layout(location = 0) out highp vec4 frag_color;

    highp float hash(highp float n)
    {
        return fract(sin(n) * 43758.546875);
    }

    highp float _noise(highp vec3 x)
    {
        highp vec3 _35 = fract(x);
        highp float _43 = dot(floor(x), vec3(1.0, 157.0, 113.0));
        highp float param = _43;
        highp float param_1 = _43 + 1.0;
        highp float _56 = _35.x;
        highp float param_2 = _43 + 157.0;
        highp float param_3 = _43 + 158.0;
        highp float _72 = _35.y;
        highp float param_4 = _43 + 113.0;
        highp float param_5 = _43 + 114.0;
        highp float param_6 = _43 + 270.0;
        highp float param_7 = _43 + 271.0;
        return mix(mix(mix(hash(param), hash(param_1), _56), mix(hash(param_2), hash(param_3), _56), _72), mix(mix(hash(param_4), hash(param_5), _56), mix(hash(param_6), hash(param_7), _56), _72), _35.z);
    }

    highp float fbm(inout highp vec3 p)
    {
        highp float f = 0.0;
        highp vec3 param = p;
        f += (_noise(param) * 0.5);
        p = (mat3(vec3(0.0, 1.60000002384185791015625, 1.2000000476837158203125), vec3(-1.60000002384185791015625, 0.7200000286102294921875, -0.959999978542327880859375), vec3(-1.2000000476837158203125, -0.959999978542327880859375, 1.2799999713897705078125)) * p) * 1.10000002384185791015625;
        highp vec3 param_1 = p;
        f += (_noise(param_1) * 0.25);
        p = (mat3(vec3(0.0, 1.60000002384185791015625, 1.2000000476837158203125), vec3(-1.60000002384185791015625, 0.7200000286102294921875, -0.959999978542327880859375), vec3(-1.2000000476837158203125, -0.959999978542327880859375, 1.2799999713897705078125)) * p) * 1.2000000476837158203125;
        highp vec3 param_2 = p;
        f += (_noise(param_2) * 0.16666667163372039794921875);
        p = (mat3(vec3(0.0, 1.60000002384185791015625, 1.2000000476837158203125), vec3(-1.60000002384185791015625, 0.7200000286102294921875, -0.959999978542327880859375), vec3(-1.2000000476837158203125, -0.959999978542327880859375, 1.2799999713897705078125)) * p) * 1.2999999523162841796875;
        highp vec3 param_3 = p;
        f += (_noise(param_3) * 0.083333335816860198974609375);
        p = (mat3(vec3(0.0, 1.60000002384185791015625, 1.2000000476837158203125), vec3(-1.60000002384185791015625, 0.7200000286102294921875, -0.959999978542327880859375), vec3(-1.2000000476837158203125, -0.959999978542327880859375, 1.2799999713897705078125)) * p) * 1.39999997615814208984375;
        highp vec3 param_4 = p;
        highp float _169 = f;
        highp float _170 = _169 + (_noise(param_4) * 0.0416666679084300994873046875);
        f = _170;
        return _170;
    }

    highp vec3 sky(highp vec3 skypos, highp vec3 sunpos)
    {
        highp float _199 = dot(normalize(skypos), normalize(sunpos));
        highp vec3 _202 = normalize(skypos);
        highp vec3 final = mix(vec3(0.3842999935150146484375, 0.81169998645782470703125, 0.956799983978271484375), vec3(0.17000000178813934326171875, 0.4000000059604644775390625, 0.949999988079071044921875), vec3(clamp(skypos.y * 2.0, 0.0, 0.699999988079071044921875))) + ((vec3(1.0) * clamp((_199 - 0.949999988079071044921875) * 10.0, 0.0, 0.800000011920928955078125)) * 0.20000000298023223876953125);
        if (_199 > 0.99989998340606689453125)
        {
            final = vec3(1.0);
        }
        highp float _237 = _202.y;
        final += (mix(vec3(1.0), vec3(0.0), vec3(clamp(abs(_237) * 80.0, 0.0, 1.0))) * 0.100000001490116119384765625);
        highp vec3 param = (_202 / vec3(_237)) * 2.0;
        highp float _260 = fbm(param);
        highp vec3 _264 = final;
        highp vec3 _272 = mix(_264, vec3(1.0), vec3((max(0.0, _237) * (smoothstep(0.5, 1.0, _260) * 0.300000011920928955078125)) * 2.0));
        final = _272;
        return _272;
    }

    void main()
    {
        highp vec3 param = normalize(pos.xyz);
        highp vec3 param_1 = vec3(0.485071241855621337890625, 0.72760689258575439453125, 0.485071241855621337890625);
        frag_color = vec4(sky(param, param_1), 1.0);
    }

*/
fs_sky_source_glsl300es := u8.[
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];
/*
    #include <metal_stdlib>
    #include <simd/simd.h>

    using namespace metal;

    struct sky_vs_params
    {
        float4x4 mvp;
    };

    struct main0_out
    {
        float4 pos [[user(locn0)]];
        float4 gl_Position [[position]];
    };

    struct main0_in
    {
        float4 position [[attribute(0)]];
    };

    vertex main0_out main0(main0_in in [[stage_in]], constant sky_vs_params& _19 [[buffer(0)]])
    {
        main0_out out = {};
        out.gl_Position = _19.mvp * float4(in.position.xyz * 500.0, 1.0);
        out.pos = in.position;
        return out;
    }

*/
vs_sky_source_metal_macos := u8.[
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/*
    #pragma clang diagnostic ignored "-Wmissing-prototypes"

    #include <metal_stdlib>
    #include <simd/simd.h>

    using namespace metal;

    struct main0_out
    {
        float4 frag_color [[color(0)]];
    };

    struct main0_in
    {
        float4 pos [[user(locn0)]];
    };

    static inline __attribute__((always_inline))
    float hash(thread const float& n)
    {
        return fract(sin(n) * 43758.546875);
    }

    static inline __attribute__((always_inline))
    float _noise(thread const float3& x)
    {
        float3 _35 = fract(x);
        float _43 = dot(floor(x), float3(1.0, 157.0, 113.0));
        float param = _43;
        float param_1 = _43 + 1.0;
        float _56 = _35.x;
        float param_2 = _43 + 157.0;
        float param_3 = _43 + 158.0;
        float _72 = _35.y;
        float param_4 = _43 + 113.0;
        float param_5 = _43 + 114.0;
        float param_6 = _43 + 270.0;
        float param_7 = _43 + 271.0;
        return mix(mix(mix(hash(param), hash(param_1), _56), mix(hash(param_2), hash(param_3), _56), _72), mix(mix(hash(param_4), hash(param_5), _56), mix(hash(param_6), hash(param_7), _56), _72), _35.z);
    }

    static inline __attribute__((always_inline))
    float fbm(thread float3& p)
    {
        float f = 0.0;
        float3 param = p;
        f += (_noise(param) * 0.5);
        p = (float3x3(float3(0.0, 1.60000002384185791015625, 1.2000000476837158203125), float3(-1.60000002384185791015625, 0.7200000286102294921875, -0.959999978542327880859375), float3(-1.2000000476837158203125, -0.959999978542327880859375, 1.2799999713897705078125)) * p) * 1.10000002384185791015625;
        float3 param_1 = p;
        f += (_noise(param_1) * 0.25);
        p = (float3x3(float3(0.0, 1.60000002384185791015625, 1.2000000476837158203125), float3(-1.60000002384185791015625, 0.7200000286102294921875, -0.959999978542327880859375), float3(-1.2000000476837158203125, -0.959999978542327880859375, 1.2799999713897705078125)) * p) * 1.2000000476837158203125;
        float3 param_2 = p;
        f += (_noise(param_2) * 0.16666667163372039794921875);
        p = (float3x3(float3(0.0, 1.60000002384185791015625, 1.2000000476837158203125), float3(-1.60000002384185791015625, 0.7200000286102294921875, -0.959999978542327880859375), float3(-1.2000000476837158203125, -0.959999978542327880859375, 1.2799999713897705078125)) * p) * 1.2999999523162841796875;
        float3 param_3 = p;
        f += (_noise(param_3) * 0.083333335816860198974609375);
        p = (float3x3(float3(0.0, 1.60000002384185791015625, 1.2000000476837158203125), float3(-1.60000002384185791015625, 0.7200000286102294921875, -0.959999978542327880859375), float3(-1.2000000476837158203125, -0.959999978542327880859375, 1.2799999713897705078125)) * p) * 1.39999997615814208984375;
        float3 param_4 = p;
        float _169 = f;
        float _170 = _169 + (_noise(param_4) * 0.0416666679084300994873046875);
        f = _170;
        return _170;
    }

    static inline __attribute__((always_inline))
    float3 sky(thread const float3& skypos, thread const float3& sunpos)
    {
        float _199 = dot(fast::normalize(skypos), fast::normalize(sunpos));
        float3 _202 = fast::normalize(skypos);
        float3 final = mix(float3(0.3842999935150146484375, 0.81169998645782470703125, 0.956799983978271484375), float3(0.17000000178813934326171875, 0.4000000059604644775390625, 0.949999988079071044921875), float3(fast::clamp(skypos.y * 2.0, 0.0, 0.699999988079071044921875))) + ((float3(1.0) * fast::clamp((_199 - 0.949999988079071044921875) * 10.0, 0.0, 0.800000011920928955078125)) * 0.20000000298023223876953125);
        if (_199 > 0.99989998340606689453125)
        {
            final = float3(1.0);
        }
        float _237 = _202.y;
        final += (mix(float3(1.0), float3(0.0), float3(fast::clamp(abs(_237) * 80.0, 0.0, 1.0))) * 0.100000001490116119384765625);
        float3 param = (_202 / float3(_237)) * 2.0;
        float _260 = fbm(param);
        float3 _264 = final;
        float3 _272 = mix(_264, float3(1.0), float3((fast::max(0.0, _237) * (smoothstep(0.5, 1.0, _260) * 0.300000011920928955078125)) * 2.0));
        final = _272;
        return _272;
    }

    fragment main0_out main0(main0_in in [[stage_in]])
    {
        main0_out out = {};
        float3 param = fast::normalize(in.pos.xyz);
        float3 param_1 = float3(0.485071241855621337890625, 0.72760689258575439453125, 0.485071241855621337890625);
        out.frag_color = float4(sky(param, param_1), 1.0);
        return out;
    }

*/
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sky_shader_desc :: (backend: sg_backend) -> sg_shader_desc {
    desc: sg_shader_desc;
    desc.label = "sky_shader";
    if backend == {
    case .GLCORE;
        desc.vertex_func.source = xx *vs_sky_source_glsl430;
        desc.vertex_func.entry = "main";
        desc.fragment_func.source = xx *fs_sky_source_glsl430;
        desc.fragment_func.entry = "main";
        desc.attrs[0].base_type = .FLOAT;
        desc.attrs[0].glsl_name = "position";
        desc.uniform_blocks[0].stage = .VERTEX;
        desc.uniform_blocks[0].layout = .STD140;
        desc.uniform_blocks[0].size = 64;
        desc.uniform_blocks[0].glsl_uniforms[0].type = .FLOAT4;
        desc.uniform_blocks[0].glsl_uniforms[0].array_count = 4;
        desc.uniform_blocks[0].glsl_uniforms[0].glsl_name = "sky_vs_params";
    case .GLES3;
        desc.vertex_func.source = xx *vs_sky_source_glsl300es;
        desc.vertex_func.entry = "main";
        desc.fragment_func.source = xx *fs_sky_source_glsl300es;
        desc.fragment_func.entry = "main";
        desc.attrs[0].base_type = .FLOAT;
        desc.attrs[0].glsl_name = "position";
        desc.uniform_blocks[0].stage = .VERTEX;
        desc.uniform_blocks[0].layout = .STD140;
        desc.uniform_blocks[0].size = 64;
        desc.uniform_blocks[0].glsl_uniforms[0].type = .FLOAT4;
        desc.uniform_blocks[0].glsl_uniforms[0].array_count = 4;
        desc.uniform_blocks[0].glsl_uniforms[0].glsl_name = "sky_vs_params";
    case .METAL_MACOS;
        desc.vertex_func.source = xx *vs_sky_source_metal_macos;
        desc.vertex_func.entry = "main0";
        desc.fragment_func.source = xx *fs_sky_source_metal_macos;
        desc.fragment_func.entry = "main0";
        desc.attrs[0].base_type = .FLOAT;
        desc.uniform_blocks[0].stage = .VERTEX;
        desc.uniform_blocks[0].layout = .STD140;
        desc.uniform_blocks[0].size = 64;
        desc.uniform_blocks[0].msl_buffer_n = 0;
    }
    return desc;
}