27 lines
746 B
Python
27 lines
746 B
Python
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$input v_skyColor, v_screenPos, v_viewDir
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/*
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* Copyright 2017 Stanislav Pidhorskyi. All rights reserved.
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* License: https://github.com/bkaradzic/bgfx#license-bsd-2-clause
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*/
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uniform vec4 u_parameters; // x - sun size, y - sun bloom, z - exposition, w - time
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uniform vec4 u_sunDirection;
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uniform vec4 u_sunLuminance;
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#include "../common/common.sh"
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void main()
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{
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float size2 = u_parameters.x * u_parameters.x;
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vec3 lightDir = normalize(u_sunDirection.xyz);
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float distance = 2.0 * (1.0 - dot(normalize(v_viewDir), lightDir));
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float sun = exp(-distance/ u_parameters.y / size2) + step(distance, size2);
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float sun2 = min(sun * sun, 1.0);
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vec3 color = v_skyColor + sun2;
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color = toGamma(color);
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gl_FragColor = vec4(color, 1.0);
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}
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