OpenGL2: Remove AGEN_FRESNEL(superceded by cubemap patch), and some small fixes and optimizations.
This commit is contained in:
SmileTheory
parent
82be4e667f
commit
acbeca6042
8 changed files with 157 additions and 213 deletions
|
|
@ -176,17 +176,21 @@ float CalcBlinn(float NH, float shininess)
|
|||
#endif
|
||||
}
|
||||
|
||||
float CalcGGX(float NH, float shininess)
|
||||
float CalcGGX(float NH, float gloss)
|
||||
{
|
||||
// from http://blog.selfshadow.com/publications/s2013-shading-course/karis/s2013_pbs_epic_notes.pdf
|
||||
float m_sq = 2.0 / shininess;
|
||||
float d = ((NH * NH) * (m_sq - 1.0) + 1.0);
|
||||
return m_sq / (d * d);
|
||||
// from http://blog.selfshadow.com/publications/s2013-shading-course/karis/s2013_pbs_epic_notes_v2.pdf
|
||||
float a_sq = exp2(gloss * -13.0 + 1.0);
|
||||
float d = ((NH * NH) * (a_sq - 1.0) + 1.0);
|
||||
return a_sq / (d * d);
|
||||
}
|
||||
|
||||
float CalcFresnel(float EH)
|
||||
{
|
||||
#if 1
|
||||
// From http://blog.selfshadow.com/publications/s2013-shading-course/lazarov/s2013_pbs_black_ops_2_notes.pdf
|
||||
// not accurate, but fast
|
||||
return exp2(-10.0 * EH);
|
||||
#elif 0
|
||||
// From http://seblagarde.wordpress.com/2012/06/03/spherical-gaussien-approximation-for-blinn-phong-phong-and-fresnel/
|
||||
return exp2((-5.55473 * EH - 6.98316) * EH);
|
||||
#elif 0
|
||||
|
|
@ -196,42 +200,48 @@ float CalcFresnel(float EH)
|
|||
|
||||
return blend;
|
||||
#else
|
||||
return pow(1.0 - NH, 5.0);
|
||||
return pow(1.0 - EH, 5.0);
|
||||
#endif
|
||||
}
|
||||
|
||||
float CalcVisibility(float NH, float NL, float NE, float EH, float shininess)
|
||||
float CalcVisibility(float NH, float NL, float NE, float EH, float gloss)
|
||||
{
|
||||
#if 0
|
||||
float geo = 2.0 * NH * min(NE, NL);
|
||||
geo /= max(EH, geo);
|
||||
|
||||
return geo;
|
||||
#else
|
||||
// Modified from http://blog.selfshadow.com/publications/s2013-shading-course/karis/s2013_pbs_epic_notes.pdf
|
||||
// NL, NE in numerator factored out from cook-torrance
|
||||
#if 1
|
||||
// From http://blog.selfshadow.com/publications/s2013-shading-course/lazarov/s2013_pbs_black_ops_2_notes.pdf
|
||||
float k = min(1.0, gloss + 0.545);
|
||||
return 1.0 / (k * EH * EH + (1.0 - k));
|
||||
#elif 0
|
||||
float roughness = exp2(gloss * -6.5);
|
||||
|
||||
#if defined(USE_GGX)
|
||||
float roughness = sqrt(2.0 / (shininess + 2.0));
|
||||
float k = (roughness + 1.0);
|
||||
// From http://blog.selfshadow.com/publications/s2013-shading-course/karis/s2013_pbs_epic_notes_v2.pdf
|
||||
float k = roughness + 1.0;
|
||||
k *= k * 0.125;
|
||||
#else
|
||||
float k = 2.0 / sqrt(3.1415926535 * (shininess + 2.0));
|
||||
float k = roughness;
|
||||
#endif
|
||||
// Modified from http://blog.selfshadow.com/publications/s2013-shading-course/karis/s2013_pbs_epic_notes_v2.pdf
|
||||
// NL, NE in numerator factored out from cook-torrance
|
||||
float k2 = 1.0 - k;
|
||||
|
||||
float invGeo1 = NL * k2 + k;
|
||||
float invGeo2 = NE * k2 + k;
|
||||
|
||||
return 1.0 / (invGeo1 * invGeo2);
|
||||
#endif
|
||||
#else
|
||||
float geo = 2.0 * NH * min(NE, NL);
|
||||
geo /= max(EH, geo);
|
||||
|
||||
return geo;
|
||||
#endif
|
||||
}
|
||||
|
||||
|
||||
vec3 CalcSpecular(vec3 specular, float NH, float NL, float NE, float EH, float shininess)
|
||||
vec3 CalcSpecular(vec3 specular, float NH, float NL, float NE, float EH, float gloss, float shininess)
|
||||
{
|
||||
float blinn = CalcBlinn(NH, shininess);
|
||||
vec3 fSpecular = mix(specular, vec3(1.0), CalcFresnel(EH));
|
||||
float vis = CalcVisibility(NH, NL, NE, EH, shininess);
|
||||
float vis = CalcVisibility(NH, NL, NE, EH, gloss);
|
||||
|
||||
#if defined(USE_BLINN)
|
||||
// Normalized Blinn-Phong
|
||||
|
|
@ -330,13 +340,12 @@ void main()
|
|||
#endif
|
||||
|
||||
vec4 diffuse = texture2D(u_DiffuseMap, texCoords);
|
||||
#if defined(USE_GAMMA2_TEXTURES)
|
||||
diffuse.rgb *= diffuse.rgb;
|
||||
#endif
|
||||
|
||||
|
||||
#if defined(USE_LIGHT) && !defined(USE_FAST_LIGHT)
|
||||
|
||||
#if defined(USE_LINEAR_LIGHT)
|
||||
diffuse.rgb *= diffuse.rgb;
|
||||
#endif
|
||||
|
||||
#if defined(USE_NORMALMAP)
|
||||
#if defined(SWIZZLE_NORMALMAP)
|
||||
N.xy = 2.0 * texture2D(u_NormalMap, texCoords).ag - vec2(1.0);
|
||||
|
|
@ -361,9 +370,9 @@ void main()
|
|||
|
||||
// surfaces not facing the light are always shadowed
|
||||
#if defined(USE_TANGENT_SPACE_LIGHT)
|
||||
shadowValue *= float(var_PrimaryLightDir.z > 0.0);
|
||||
shadowValue *= step(0.0, var_PrimaryLightDir.z);
|
||||
#else
|
||||
shadowValue *= float(dot(var_Normal.xyz, var_PrimaryLightDir.xyz) > 0.0);
|
||||
shadowValue *= step(0.0, dot(var_Normal.xyz, var_PrimaryLightDir.xyz));
|
||||
#endif
|
||||
|
||||
#if defined(SHADOWMAP_MODULATE)
|
||||
|
|
@ -403,9 +412,9 @@ void main()
|
|||
|
||||
#if defined(USE_SPECULARMAP)
|
||||
vec4 specular = texture2D(u_SpecularMap, texCoords);
|
||||
#if defined(USE_LINEAR_LIGHT)
|
||||
#if defined(USE_GAMMA2_TEXTURES)
|
||||
specular.rgb *= specular.rgb;
|
||||
#endif
|
||||
#endif
|
||||
#else
|
||||
vec4 specular = vec4(1.0);
|
||||
#endif
|
||||
|
|
@ -414,7 +423,6 @@ void main()
|
|||
|
||||
float gloss = specular.a;
|
||||
float shininess = exp2(gloss * 13.0);
|
||||
float localOcclusion = clamp((diffuse.r + diffuse.g + diffuse.b) * 16.0f, 0.0, 1.0);
|
||||
|
||||
#if defined(SPECULAR_IS_METALLIC)
|
||||
// diffuse is actually base color, and red of specular is metallicness
|
||||
|
|
@ -431,10 +439,12 @@ void main()
|
|||
reflectance = CalcDiffuse(diffuse.rgb, N, L, E, NE, NL, shininess);
|
||||
|
||||
#if defined(r_deluxeSpecular) || defined(USE_LIGHT_VECTOR)
|
||||
float adjGloss = gloss;
|
||||
float adjShininess = shininess;
|
||||
|
||||
#if !defined(USE_LIGHT_VECTOR)
|
||||
adjShininess = exp2(gloss * r_deluxeSpecular * 13.0);
|
||||
adjGloss *= r_deluxeSpecular;
|
||||
adjShininess = exp2(adjGloss * 13.0);
|
||||
#endif
|
||||
|
||||
H = normalize(L + E);
|
||||
|
|
@ -443,9 +453,9 @@ void main()
|
|||
NH = clamp(dot(N, H), 0.0, 1.0);
|
||||
|
||||
#if !defined(USE_LIGHT_VECTOR)
|
||||
reflectance += CalcSpecular(specular.rgb, NH, NL, NE, EH, adjShininess) * r_deluxeSpecular * localOcclusion;
|
||||
reflectance += CalcSpecular(specular.rgb, NH, NL, NE, EH, adjGloss, adjShininess) * r_deluxeSpecular;
|
||||
#else
|
||||
reflectance += CalcSpecular(specular.rgb, NH, NL, NE, EH, adjShininess) * localOcclusion;
|
||||
reflectance += CalcSpecular(specular.rgb, NH, NL, NE, EH, adjGloss, adjShininess);
|
||||
#endif
|
||||
#endif
|
||||
|
||||
|
|
@ -462,10 +472,6 @@ void main()
|
|||
|
||||
vec3 cubeLightColor = textureCubeLod(u_CubeMap, R, 7.0 - gloss * 7.0).rgb;
|
||||
|
||||
#if defined(USE_LINEAR_LIGHT)
|
||||
cubeLightColor *= cubeLightColor;
|
||||
#endif
|
||||
|
||||
#if defined(USE_LIGHTMAP)
|
||||
cubeLightColor *= lightSample.rgb;
|
||||
#elif defined (USE_LIGHT_VERTEX)
|
||||
|
|
@ -475,11 +481,11 @@ void main()
|
|||
#endif
|
||||
|
||||
//gl_FragColor.rgb += diffuse.rgb * textureCubeLod(u_CubeMap, N, 7.0).rgb;
|
||||
gl_FragColor.rgb += cubeLightColor * reflectance * localOcclusion;
|
||||
gl_FragColor.rgb += cubeLightColor * reflectance;
|
||||
#endif
|
||||
|
||||
#if defined(USE_PRIMARY_LIGHT)
|
||||
L = normalize(var_PrimaryLightDir.xyz);
|
||||
L = var_PrimaryLightDir.xyz; //normalize(var_PrimaryLightDir.xyz);
|
||||
NL = clamp(dot(N, L), 0.0, 1.0);
|
||||
|
||||
H = normalize(L + E);
|
||||
|
|
@ -487,7 +493,7 @@ void main()
|
|||
NH = clamp(dot(N, H), 0.0, 1.0);
|
||||
|
||||
reflectance = CalcDiffuse(diffuse.rgb, N, L, E, NE, NL, shininess);
|
||||
reflectance += CalcSpecular(specular.rgb, NH, NL, NE, EH, shininess);
|
||||
reflectance += CalcSpecular(specular.rgb, NH, NL, NE, EH, gloss, shininess);
|
||||
|
||||
lightColor = u_PrimaryLightColor; // * CalcLightAttenuation(L, u_PrimaryLightDir.w);
|
||||
|
||||
|
|
@ -497,10 +503,6 @@ void main()
|
|||
|
||||
gl_FragColor.rgb += lightColor * reflectance * NL;
|
||||
#endif
|
||||
|
||||
#if defined(USE_LINEAR_LIGHT)
|
||||
gl_FragColor.rgb = sqrt(gl_FragColor.rgb);
|
||||
#endif
|
||||
|
||||
gl_FragColor.a = diffuse.a;
|
||||
#else
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue