mirror of
https://github.com/yuzu-mirror/yuzu.git
synced 2024-09-09 16:29:08 +01:00
Merge pull request #2776 from wwylele/geo-factor
Fragment lighting: implement geometric factor
This commit is contained in:
commit
d0888f8548
3 changed files with 26 additions and 7 deletions
|
@ -168,6 +168,8 @@ struct LightingRegs {
|
|||
union {
|
||||
BitField<0, 1, u32> directional;
|
||||
BitField<1, 1, u32> two_sided_diffuse; // When disabled, clamp dot-product to 0
|
||||
BitField<2, 1, u32> geometric_factor_0;
|
||||
BitField<3, 1, u32> geometric_factor_1;
|
||||
} config;
|
||||
|
||||
BitField<0, 20, u32> dist_atten_bias;
|
||||
|
|
|
@ -73,6 +73,8 @@ PicaShaderConfig PicaShaderConfig::BuildFromRegs(const Pica::Regs& regs) {
|
|||
state.lighting.light[light_index].num = num;
|
||||
state.lighting.light[light_index].directional = light.config.directional != 0;
|
||||
state.lighting.light[light_index].two_sided_diffuse = light.config.two_sided_diffuse != 0;
|
||||
state.lighting.light[light_index].geometric_factor_0 = light.config.geometric_factor_0 != 0;
|
||||
state.lighting.light[light_index].geometric_factor_1 = light.config.geometric_factor_1 != 0;
|
||||
state.lighting.light[light_index].dist_atten_enable =
|
||||
!regs.lighting.IsDistAttenDisabled(num);
|
||||
state.lighting.light[light_index].spot_atten_enable =
|
||||
|
@ -518,7 +520,9 @@ static void WriteLighting(std::string& out, const PicaShaderConfig& config) {
|
|||
"vec4 specular_sum = vec4(0.0, 0.0, 0.0, 1.0);\n"
|
||||
"vec3 light_vector = vec3(0.0);\n"
|
||||
"vec3 refl_value = vec3(0.0);\n"
|
||||
"vec3 spot_dir = vec3(0.0);\n;";
|
||||
"vec3 spot_dir = vec3(0.0);\n"
|
||||
"vec3 half_vector = vec3(0.0);\n"
|
||||
"float geo_factor = 1.0;\n";
|
||||
|
||||
// Compute fragment normals and tangents
|
||||
const std::string pertubation =
|
||||
|
@ -561,15 +565,14 @@ static void WriteLighting(std::string& out, const PicaShaderConfig& config) {
|
|||
// Gets the index into the specified lookup table for specular lighting
|
||||
auto GetLutIndex = [&lighting](unsigned light_num, LightingRegs::LightingLutInput input,
|
||||
bool abs) {
|
||||
const std::string half_angle = "normalize(normalize(view) + light_vector)";
|
||||
std::string index;
|
||||
switch (input) {
|
||||
case LightingRegs::LightingLutInput::NH:
|
||||
index = "dot(normal, " + half_angle + ")";
|
||||
index = "dot(normal, normalize(half_vector))";
|
||||
break;
|
||||
|
||||
case LightingRegs::LightingLutInput::VH:
|
||||
index = std::string("dot(normalize(view), " + half_angle + ")");
|
||||
index = std::string("dot(normalize(view), normalize(half_vector))");
|
||||
break;
|
||||
|
||||
case LightingRegs::LightingLutInput::NV:
|
||||
|
@ -590,9 +593,8 @@ static void WriteLighting(std::string& out, const PicaShaderConfig& config) {
|
|||
// Note: even if the normal vector is modified by normal map, which is not the
|
||||
// normal of the tangent plane anymore, the half angle vector is still projected
|
||||
// using the modified normal vector.
|
||||
std::string half_angle_proj = half_angle +
|
||||
" - normal / dot(normal, normal) * dot(normal, " +
|
||||
half_angle + ")";
|
||||
std::string half_angle_proj = "normalize(half_vector) - normal / dot(normal, "
|
||||
"normal) * dot(normal, normalize(half_vector))";
|
||||
// Note: the half angle vector projection is confirmed not normalized before the dot
|
||||
// product. The result is in fact not cos(phi) as the name suggested.
|
||||
index = "dot(" + half_angle_proj + ", tangent)";
|
||||
|
@ -638,6 +640,7 @@ static void WriteLighting(std::string& out, const PicaShaderConfig& config) {
|
|||
out += "light_vector = normalize(" + light_src + ".position + view);\n";
|
||||
|
||||
out += "spot_dir = " + light_src + ".spot_direction;\n";
|
||||
out += "half_vector = normalize(view) + light_vector;\n";
|
||||
|
||||
// Compute dot product of light_vector and normal, adjust if lighting is one-sided or
|
||||
// two-sided
|
||||
|
@ -671,6 +674,12 @@ static void WriteLighting(std::string& out, const PicaShaderConfig& config) {
|
|||
std::string clamp_highlights =
|
||||
lighting.clamp_highlights ? "(dot(light_vector, normal) <= 0.0 ? 0.0 : 1.0)" : "1.0";
|
||||
|
||||
if (light_config.geometric_factor_0 || light_config.geometric_factor_1) {
|
||||
out += "geo_factor = dot(half_vector, half_vector);\n"
|
||||
"geo_factor = geo_factor == 0.0 ? 0.0 : min(" +
|
||||
dot_product + " / geo_factor, 1.0);\n";
|
||||
}
|
||||
|
||||
// Specular 0 component
|
||||
std::string d0_lut_value = "1.0";
|
||||
if (lighting.lut_d0.enable &&
|
||||
|
@ -683,6 +692,9 @@ static void WriteLighting(std::string& out, const PicaShaderConfig& config) {
|
|||
GetLutValue(LightingRegs::LightingSampler::Distribution0, index) + ")";
|
||||
}
|
||||
std::string specular_0 = "(" + d0_lut_value + " * " + light_src + ".specular_0)";
|
||||
if (light_config.geometric_factor_0) {
|
||||
specular_0 = "(" + specular_0 + " * geo_factor)";
|
||||
}
|
||||
|
||||
// If enabled, lookup ReflectRed value, otherwise, 1.0 is used
|
||||
if (lighting.lut_rr.enable &&
|
||||
|
@ -738,6 +750,9 @@ static void WriteLighting(std::string& out, const PicaShaderConfig& config) {
|
|||
}
|
||||
std::string specular_1 =
|
||||
"(" + d1_lut_value + " * refl_value * " + light_src + ".specular_1)";
|
||||
if (light_config.geometric_factor_1) {
|
||||
specular_1 = "(" + specular_1 + " * geo_factor)";
|
||||
}
|
||||
|
||||
// Fresnel
|
||||
if (lighting.lut_fr.enable &&
|
||||
|
|
|
@ -94,6 +94,8 @@ union PicaShaderConfig {
|
|||
bool two_sided_diffuse;
|
||||
bool dist_atten_enable;
|
||||
bool spot_atten_enable;
|
||||
bool geometric_factor_0;
|
||||
bool geometric_factor_1;
|
||||
} light[8];
|
||||
|
||||
bool enable;
|
||||
|
|
Loading…
Reference in a new issue