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Merge pull request #29909 from clayjohn/gles2-light-scale

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Scale vertex lit lights by environment scale
This commit is contained in:
Rémi Verschelde 2019-07-01 16:28:17 +02:00 committed by GitHub
commit b0eeb12335
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1 changed files with 35 additions and 22 deletions
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57
drivers/gles2/shaders/scene.glsl
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@ -262,7 +262,7 @@ void light_compute(
#endif
SRGB_APPROX(specular_brdf_NL)
specular_interp += specular_brdf_NL * light_color * attenuation;
specular_interp += specular_brdf_NL * light_color * attenuation * (1.0 / M_PI);
}
}
@ -1641,18 +1641,30 @@ FRAGMENT_SHADER_CODE
#endif // defined(USE_REFLECTION_PROBE1) || defined(USE_REFLECTION_PROBE2)
// scales the specular reflections, needs to be be computed before lighting happens,
// but after environment and reflection probes are added
//TODO: this curve is not really designed for gammaspace, should be adjusted
const vec4 c0 = vec4(-1.0, -0.0275, -0.572, 0.022);
const vec4 c1 = vec4(1.0, 0.0425, 1.04, -0.04);
vec4 r = roughness * c0 + c1;
float ndotv = clamp(dot(normal, eye_position), 0.0, 1.0);
float a004 = min(r.x * r.x, exp2(-9.28 * ndotv)) * r.x + r.y;
vec2 env = vec2(-1.04, 1.04) * a004 + r.zw;
// environment BRDF approximation
vec3 f0 = F0(metallic, specular, albedo);
specular_light *= env.x * f0 + env.y;
{
#if defined(DIFFUSE_TOON)
//simplify for toon, as
specular_light *= specular * metallic * albedo * 2.0;
#else
// scales the specular reflections, needs to be be computed before lighting happens,
// but after environment and reflection probes are added
//TODO: this curve is not really designed for gammaspace, should be adjusted
const vec4 c0 = vec4(-1.0, -0.0275, -0.572, 0.022);
const vec4 c1 = vec4(1.0, 0.0425, 1.04, -0.04);
vec4 r = roughness * c0 + c1;
float ndotv = clamp(dot(normal, eye_position), 0.0, 1.0);
float a004 = min(r.x * r.x, exp2(-9.28 * ndotv)) * r.x + r.y;
vec2 env = vec2(-1.04, 1.04) * a004 + r.zw;
vec3 f0 = F0(metallic, specular, albedo);
specular_light *= env.x * f0 + env.y;
#endif
}
#ifdef USE_LIGHTMAP
//ambient light will come entirely from lightmap is lightmap is used
@ -2048,6 +2060,17 @@ FRAGMENT_SHADER_CODE
specular_light += specular_interp * specular_blob_intensity * light_att;
diffuse_light += diffuse_interp * albedo * light_att;
// Same as above, needed for VERTEX_LIGHTING or else lights are too bright
const vec4 c0 = vec4(-1.0, -0.0275, -0.572, 0.022);
const vec4 c1 = vec4(1.0, 0.0425, 1.04, -0.04);
vec4 r = roughness * c0 + c1;
float ndotv = clamp(dot(normal, eye_position), 0.0, 1.0);
float a004 = min(r.x * r.x, exp2(-9.28 * ndotv)) * r.x + r.y;
vec2 env = vec2(-1.04, 1.04) * a004 + r.zw;
vec3 f0 = F0(metallic, specular, albedo);
specular_light *= env.x * f0 + env.y;
#else
//fragment lighting
light_compute(
@ -2115,16 +2138,6 @@ FRAGMENT_SHADER_CODE
diffuse_light *= 1.0 - metallic;
ambient_light *= 1.0 - metallic;
// environment BRDF approximation
{
#if defined(DIFFUSE_TOON)
//simplify for toon, as
specular_light *= specular * metallic * albedo * 2.0;
#endif
}
gl_FragColor = vec4(ambient_light + diffuse_light + specular_light, alpha);
//add emission if in base pass