diff options
Diffstat (limited to 'servers/rendering/rasterizer_rd/shaders/scene_high_end.glsl')
| -rw-r--r-- | servers/rendering/rasterizer_rd/shaders/scene_high_end.glsl | 1718 |
1 files changed, 1718 insertions, 0 deletions
diff --git a/servers/rendering/rasterizer_rd/shaders/scene_high_end.glsl b/servers/rendering/rasterizer_rd/shaders/scene_high_end.glsl new file mode 100644 index 0000000000..07f4770b14 --- /dev/null +++ b/servers/rendering/rasterizer_rd/shaders/scene_high_end.glsl @@ -0,0 +1,1718 @@ +/* clang-format off */ +[vertex] + +#version 450 + +VERSION_DEFINES + +#include "scene_high_end_inc.glsl" + +/* INPUT ATTRIBS */ + +layout(location = 0) in vec3 vertex_attrib; +/* clang-format on */ +layout(location = 1) in vec3 normal_attrib; +#if defined(TANGENT_USED) || defined(NORMALMAP_USED) || defined(LIGHT_ANISOTROPY_USED) +layout(location = 2) in vec4 tangent_attrib; +#endif + +#if defined(COLOR_USED) +layout(location = 3) in vec4 color_attrib; +#endif + +#if defined(UV_USED) +layout(location = 4) in vec2 uv_attrib; +#endif + +#if defined(UV2_USED) || defined(USE_LIGHTMAP) +layout(location = 5) in vec2 uv2_attrib; +#endif + +layout(location = 6) in uvec4 bone_attrib; // always bound, even if unused + +/* Varyings */ + +layout(location = 0) out vec3 vertex_interp; +layout(location = 1) out vec3 normal_interp; + +#if defined(COLOR_USED) +layout(location = 2) out vec4 color_interp; +#endif + +#if defined(UV_USED) +layout(location = 3) out vec2 uv_interp; +#endif + +#if defined(UV2_USED) || defined(USE_LIGHTMAP) +layout(location = 4) out vec2 uv2_interp; +#endif + +#if defined(TANGENT_USED) || defined(NORMALMAP_USED) || defined(LIGHT_ANISOTROPY_USED) +layout(location = 5) out vec3 tangent_interp; +layout(location = 6) out vec3 binormal_interp; +#endif + +#ifdef USE_MATERIAL_UNIFORMS +layout(set = 5, binding = 0, std140) uniform MaterialUniforms{ + /* clang-format off */ +MATERIAL_UNIFORMS + /* clang-format on */ +} material; +#endif + +/* clang-format off */ + +VERTEX_SHADER_GLOBALS + +/* clang-format on */ + +// FIXME: This triggers a Mesa bug that breaks rendering, so disabled for now. +// See GH-13450 and https://bugs.freedesktop.org/show_bug.cgi?id=100316 +invariant gl_Position; + +layout(location = 7) flat out uint instance_index; + +#ifdef MODE_DUAL_PARABOLOID + +layout(location = 8) out float dp_clip; + +#endif + +void main() { + + instance_index = draw_call.instance_index; + vec4 instance_custom = vec4(0.0); +#if defined(COLOR_USED) + color_interp = color_attrib; +#endif + + mat4 world_matrix = instances.data[instance_index].transform; + mat3 world_normal_matrix = mat3(instances.data[instance_index].normal_transform); + + if (bool(instances.data[instance_index].flags & INSTANCE_FLAGS_MULTIMESH)) { + //multimesh, instances are for it + uint offset = (instances.data[instance_index].flags >> INSTANCE_FLAGS_MULTIMESH_STRIDE_SHIFT) & INSTANCE_FLAGS_MULTIMESH_STRIDE_MASK; + offset *= gl_InstanceIndex; + + mat4 matrix; + if (bool(instances.data[instance_index].flags & INSTANCE_FLAGS_MULTIMESH_FORMAT_2D)) { + matrix = mat4(transforms.data[offset + 0], transforms.data[offset + 1], vec4(0.0, 0.0, 1.0, 0.0), vec4(0.0, 0.0, 0.0, 1.0)); + offset += 2; + } else { + matrix = mat4(transforms.data[offset + 0], transforms.data[offset + 1], transforms.data[offset + 2], vec4(0.0, 0.0, 0.0, 1.0)); + offset += 3; + } + + if (bool(instances.data[instance_index].flags & INSTANCE_FLAGS_MULTIMESH_HAS_COLOR)) { +#ifdef COLOR_USED + color_interp *= transforms.data[offset]; +#endif + offset += 1; + } + + if (bool(instances.data[instance_index].flags & INSTANCE_FLAGS_MULTIMESH_HAS_CUSTOM_DATA)) { + instance_custom = transforms.data[offset]; + } + + //transpose + matrix = transpose(matrix); + world_matrix = world_matrix * matrix; + world_normal_matrix = world_normal_matrix * mat3(matrix); + + } else { + //not a multimesh, instances are for multiple draw calls + instance_index += gl_InstanceIndex; + } + + vec3 vertex = vertex_attrib; + vec3 normal = normal_attrib; + +#if defined(TANGENT_USED) || defined(NORMALMAP_USED) || defined(LIGHT_ANISOTROPY_USED) + vec3 tangent = tangent_attrib.xyz; + float binormalf = tangent_attrib.a; + vec3 binormal = normalize(cross(normal, tangent) * binormalf); +#endif + + if (bool(instances.data[instance_index].flags & INSTANCE_FLAGS_SKELETON)) { + //multimesh, instances are for it + + uvec2 bones_01 = uvec2(bone_attrib.x & 0xFFFF, bone_attrib.x >> 16) * 3; + uvec2 bones_23 = uvec2(bone_attrib.y & 0xFFFF, bone_attrib.y >> 16) * 3; + vec2 weights_01 = unpackUnorm2x16(bone_attrib.z); + vec2 weights_23 = unpackUnorm2x16(bone_attrib.w); + + mat4 m = mat4(transforms.data[bones_01.x], transforms.data[bones_01.x + 1], transforms.data[bones_01.x + 2], vec4(0.0, 0.0, 0.0, 1.0)) * weights_01.x; + m += mat4(transforms.data[bones_01.y], transforms.data[bones_01.y + 1], transforms.data[bones_01.y + 2], vec4(0.0, 0.0, 0.0, 1.0)) * weights_01.y; + m += mat4(transforms.data[bones_23.x], transforms.data[bones_23.x + 1], transforms.data[bones_23.x + 2], vec4(0.0, 0.0, 0.0, 1.0)) * weights_23.x; + m += mat4(transforms.data[bones_23.y], transforms.data[bones_23.y + 1], transforms.data[bones_23.y + 2], vec4(0.0, 0.0, 0.0, 1.0)) * weights_23.y; + + //reverse order because its transposed + vertex = (vec4(vertex, 1.0) * m).xyz; + normal = (vec4(normal, 0.0) * m).xyz; + +#if defined(TANGENT_USED) || defined(NORMALMAP_USED) || defined(LIGHT_ANISOTROPY_USED) + + tangent = (vec4(tangent, 0.0) * m).xyz; + binormal = (vec4(binormal, 0.0) * m).xyz; +#endif + } + +#if defined(UV_USED) + uv_interp = uv_attrib; +#endif + +#if defined(UV2_USED) || defined(USE_LIGHTMAP) + uv2_interp = uv2_attrib; +#endif + +#ifdef USE_OVERRIDE_POSITION + vec4 position; +#endif + + mat4 projection_matrix = scene_data.projection_matrix; + +//using world coordinates +#if !defined(SKIP_TRANSFORM_USED) && defined(VERTEX_WORLD_COORDS_USED) + + vertex = (world_matrix * vec4(vertex, 1.0)).xyz; + + normal = world_normal_matrix * normal; + +#if defined(TANGENT_USED) || defined(NORMALMAP_USED) || defined(LIGHT_ANISOTROPY_USED) + + tangent = world_normal_matrix * tangent; + binormal = world_normal_matrix * binormal; + +#endif +#endif + + float roughness = 1.0; + + mat4 modelview = scene_data.inv_camera_matrix * world_matrix; + mat3 modelview_normal = mat3(scene_data.inv_camera_matrix) * world_normal_matrix; + + { + /* clang-format off */ + +VERTEX_SHADER_CODE + + /* clang-format on */ + } + +// using local coordinates (default) +#if !defined(SKIP_TRANSFORM_USED) && !defined(VERTEX_WORLD_COORDS_USED) + + vertex = (modelview * vec4(vertex, 1.0)).xyz; + normal = modelview_normal * normal; +#endif + +#if defined(TANGENT_USED) || defined(NORMALMAP_USED) || defined(LIGHT_ANISOTROPY_USED) + + binormal = modelview_normal * binormal; + tangent = modelview_normal * tangent; +#endif + +//using world coordinates +#if !defined(SKIP_TRANSFORM_USED) && defined(VERTEX_WORLD_COORDS_USED) + + vertex = (scene_data.inv_camera_matrix * vec4(vertex, 1.0)).xyz; + normal = mat3(scene_data.inverse_normal_matrix) * normal; + +#if defined(TANGENT_USED) || defined(NORMALMAP_USED) || defined(LIGHT_ANISOTROPY_USED) + + binormal = mat3(scene_data.camera_inverse_binormal_matrix) * binormal; + tangent = mat3(scene_data.camera_inverse_tangent_matrix) * tangent; +#endif +#endif + + vertex_interp = vertex; + normal_interp = normal; + +#if defined(TANGENT_USED) || defined(NORMALMAP_USED) || defined(LIGHT_ANISOTROPY_USED) + tangent_interp = tangent; + binormal_interp = binormal; +#endif + +#ifdef MODE_RENDER_DEPTH + +#ifdef MODE_DUAL_PARABOLOID + + vertex_interp.z *= scene_data.dual_paraboloid_side; + normal_interp.z *= scene_data.dual_paraboloid_side; + + dp_clip = vertex_interp.z; //this attempts to avoid noise caused by objects sent to the other parabolloid side due to bias + + //for dual paraboloid shadow mapping, this is the fastest but least correct way, as it curves straight edges + + vec3 vtx = vertex_interp + normalize(vertex_interp) * scene_data.z_offset; + float distance = length(vtx); + vtx = normalize(vtx); + vtx.xy /= 1.0 - vtx.z; + vtx.z = (distance / scene_data.z_far); + vtx.z = vtx.z * 2.0 - 1.0; + + vertex_interp = vtx; +#else + + float z_ofs = scene_data.z_offset; + z_ofs += max(0.0, 1.0 - abs(normalize(normal_interp).z)) * scene_data.z_slope_scale; + vertex_interp.z -= z_ofs; + +#endif + +#endif //MODE_RENDER_DEPTH + +#ifdef USE_OVERRIDE_POSITION + gl_Position = position; +#else + gl_Position = projection_matrix * vec4(vertex_interp, 1.0); +#endif +} + +/* clang-format off */ +[fragment] + +#version 450 + +VERSION_DEFINES + +#include "scene_high_end_inc.glsl" + +/* Varyings */ + +layout(location = 0) in vec3 vertex_interp; +/* clang-format on */ +layout(location = 1) in vec3 normal_interp; + +#if defined(COLOR_USED) +layout(location = 2) in vec4 color_interp; +#endif + +#if defined(UV_USED) +layout(location = 3) in vec2 uv_interp; +#endif + +#if defined(UV2_USED) || defined(USE_LIGHTMAP) +layout(location = 4) in vec2 uv2_interp; +#endif + +#if defined(TANGENT_USED) || defined(NORMALMAP_USED) || defined(LIGHT_ANISOTROPY_USED) +layout(location = 5) in vec3 tangent_interp; +layout(location = 6) in vec3 binormal_interp; +#endif + +layout(location = 7) flat in uint instance_index; + +#ifdef MODE_DUAL_PARABOLOID + +layout(location = 8) in float dp_clip; + +#endif + +//defines to keep compatibility with vertex + +#define world_matrix instances.data[instance_index].transform +#define world_normal_matrix instances.data[instance_index].normal_transform +#define projection_matrix scene_data.projection_matrix + +#ifdef USE_MATERIAL_UNIFORMS +layout(set = 5, binding = 0, std140) uniform MaterialUniforms{ + /* clang-format off */ +MATERIAL_UNIFORMS + /* clang-format on */ +} material; +#endif + +/* clang-format off */ + +FRAGMENT_SHADER_GLOBALS + +/* clang-format on */ + +#ifdef MODE_RENDER_DEPTH + +#ifdef MODE_RENDER_MATERIAL + +layout(location = 0) out vec4 albedo_output_buffer; +layout(location = 1) out vec4 normal_output_buffer; +layout(location = 2) out vec4 orm_output_buffer; +layout(location = 3) out vec4 emission_output_buffer; +layout(location = 4) out float depth_output_buffer; + +#endif + +#ifdef MODE_RENDER_NORMAL +layout(location = 0) out vec4 normal_output_buffer; +#ifdef MODE_RENDER_ROUGHNESS +layout(location = 1) out float roughness_output_buffer; +#endif //MODE_RENDER_ROUGHNESS +#endif //MODE_RENDER_NORMAL +#else // RENDER DEPTH + +#ifdef MODE_MULTIPLE_RENDER_TARGETS + +layout(location = 0) out vec4 diffuse_buffer; //diffuse (rgb) and roughness +layout(location = 1) out vec4 specular_buffer; //specular and SSS (subsurface scatter) +#else + +layout(location = 0) out vec4 frag_color; +#endif + +#endif // RENDER DEPTH + +// This returns the G_GGX function divided by 2 cos_theta_m, where in practice cos_theta_m is either N.L or N.V. +// We're dividing this factor off because the overall term we'll end up looks like +// (see, for example, the first unnumbered equation in B. Burley, "Physically Based Shading at Disney", SIGGRAPH 2012): +// +// F(L.V) D(N.H) G(N.L) G(N.V) / (4 N.L N.V) +// +// We're basically regouping this as +// +// F(L.V) D(N.H) [G(N.L)/(2 N.L)] [G(N.V) / (2 N.V)] +// +// and thus, this function implements the [G(N.m)/(2 N.m)] part with m = L or V. +// +// The contents of the D and G (G1) functions (GGX) are taken from +// E. Heitz, "Understanding the Masking-Shadowing Function in Microfacet-Based BRDFs", J. Comp. Graph. Tech. 3 (2) (2014). +// Eqns 71-72 and 85-86 (see also Eqns 43 and 80). + +#if !defined(MODE_RENDER_DEPTH) && !defined(MODE_UNSHADED) + +float G_GGX_2cos(float cos_theta_m, float alpha) { + // Schlick's approximation + // C. Schlick, "An Inexpensive BRDF Model for Physically-based Rendering", Computer Graphics Forum. 13 (3): 233 (1994) + // Eq. (19), although see Heitz (2014) the about the problems with his derivation. + // It nevertheless approximates GGX well with k = alpha/2. + float k = 0.5 * alpha; + return 0.5 / (cos_theta_m * (1.0 - k) + k); + + // float cos2 = cos_theta_m * cos_theta_m; + // float sin2 = (1.0 - cos2); + // return 1.0 / (cos_theta_m + sqrt(cos2 + alpha * alpha * sin2)); +} + +float D_GGX(float cos_theta_m, float alpha) { + float alpha2 = alpha * alpha; + float d = 1.0 + (alpha2 - 1.0) * cos_theta_m * cos_theta_m; + return alpha2 / (M_PI * d * d); +} + +float G_GGX_anisotropic_2cos(float cos_theta_m, float alpha_x, float alpha_y, float cos_phi, float sin_phi) { + float cos2 = cos_theta_m * cos_theta_m; + float sin2 = (1.0 - cos2); + float s_x = alpha_x * cos_phi; + float s_y = alpha_y * sin_phi; + return 1.0 / max(cos_theta_m + sqrt(cos2 + (s_x * s_x + s_y * s_y) * sin2), 0.001); +} + +float D_GGX_anisotropic(float cos_theta_m, float alpha_x, float alpha_y, float cos_phi, float sin_phi) { + float cos2 = cos_theta_m * cos_theta_m; + float sin2 = (1.0 - cos2); + float r_x = cos_phi / alpha_x; + float r_y = sin_phi / alpha_y; + float d = cos2 + sin2 * (r_x * r_x + r_y * r_y); + return 1.0 / max(M_PI * alpha_x * alpha_y * d * d, 0.001); +} + +float SchlickFresnel(float u) { + float m = 1.0 - u; + float m2 = m * m; + return m2 * m2 * m; // pow(m,5) +} + +float GTR1(float NdotH, float a) { + if (a >= 1.0) return 1.0 / M_PI; + float a2 = a * a; + float t = 1.0 + (a2 - 1.0) * NdotH * NdotH; + return (a2 - 1.0) / (M_PI * log(a2) * t); +} + +vec3 F0(float metallic, float specular, vec3 albedo) { + float dielectric = 0.16 * specular * specular; + // use albedo * metallic as colored specular reflectance at 0 angle for metallic materials; + // see https://google.github.io/filament/Filament.md.html + return mix(vec3(dielectric), albedo, vec3(metallic)); +} + +void light_compute(vec3 N, vec3 L, vec3 V, vec3 light_color, vec3 attenuation, vec3 diffuse_color, float roughness, float metallic, float specular, float specular_blob_intensity, +#ifdef LIGHT_TRANSMISSION_USED + vec3 transmission, +#endif +#ifdef LIGHT_RIM_USED + float rim, float rim_tint, +#endif +#ifdef LIGHT_CLEARCOAT_USED + float clearcoat, float clearcoat_gloss, +#endif +#ifdef LIGHT_ANISOTROPY_USED + vec3 B, vec3 T, float anisotropy, +#endif +#ifdef USE_SHADOW_TO_OPACITY + inout float alpha, +#endif + inout vec3 diffuse_light, inout vec3 specular_light) { + +#if defined(USE_LIGHT_SHADER_CODE) + // light is written by the light shader + + vec3 normal = N; + vec3 albedo = diffuse_color; + vec3 light = L; + vec3 view = V; + + /* clang-format off */ + +LIGHT_SHADER_CODE + + /* clang-format on */ + +#else + float NdotL = dot(N, L); + float cNdotL = max(NdotL, 0.0); // clamped NdotL + float NdotV = dot(N, V); + float cNdotV = max(NdotV, 0.0); + +#if defined(DIFFUSE_BURLEY) || defined(SPECULAR_BLINN) || defined(SPECULAR_SCHLICK_GGX) || defined(LIGHT_CLEARCOAT_USED) + vec3 H = normalize(V + L); +#endif + +#if defined(SPECULAR_BLINN) || defined(SPECULAR_SCHLICK_GGX) || defined(LIGHT_CLEARCOAT_USED) + float cNdotH = max(dot(N, H), 0.0); +#endif + +#if defined(DIFFUSE_BURLEY) || defined(SPECULAR_SCHLICK_GGX) || defined(LIGHT_CLEARCOAT_USED) + float cLdotH = max(dot(L, H), 0.0); +#endif + + if (metallic < 1.0) { +#if defined(DIFFUSE_OREN_NAYAR) + vec3 diffuse_brdf_NL; +#else + float diffuse_brdf_NL; // BRDF times N.L for calculating diffuse radiance +#endif + +#if defined(DIFFUSE_LAMBERT_WRAP) + // energy conserving lambert wrap shader + diffuse_brdf_NL = max(0.0, (NdotL + roughness) / ((1.0 + roughness) * (1.0 + roughness))); + +#elif defined(DIFFUSE_OREN_NAYAR) + + { + // see http://mimosa-pudica.net/improved-oren-nayar.html + float LdotV = dot(L, V); + + float s = LdotV - NdotL * NdotV; + float t = mix(1.0, max(NdotL, NdotV), step(0.0, s)); + + float sigma2 = roughness * roughness; // TODO: this needs checking + vec3 A = 1.0 + sigma2 * (-0.5 / (sigma2 + 0.33) + 0.17 * diffuse_color / (sigma2 + 0.13)); + float B = 0.45 * sigma2 / (sigma2 + 0.09); + + diffuse_brdf_NL = cNdotL * (A + vec3(B) * s / t) * (1.0 / M_PI); + } + +#elif defined(DIFFUSE_TOON) + + diffuse_brdf_NL = smoothstep(-roughness, max(roughness, 0.01), NdotL); + +#elif defined(DIFFUSE_BURLEY) + + { + float FD90_minus_1 = 2.0 * cLdotH * cLdotH * roughness - 0.5; + float FdV = 1.0 + FD90_minus_1 * SchlickFresnel(cNdotV); + float FdL = 1.0 + FD90_minus_1 * SchlickFresnel(cNdotL); + diffuse_brdf_NL = (1.0 / M_PI) * FdV * FdL * cNdotL; + /* + float energyBias = mix(roughness, 0.0, 0.5); + float energyFactor = mix(roughness, 1.0, 1.0 / 1.51); + float fd90 = energyBias + 2.0 * VoH * VoH * roughness; + float f0 = 1.0; + float lightScatter = f0 + (fd90 - f0) * pow(1.0 - cNdotL, 5.0); + float viewScatter = f0 + (fd90 - f0) * pow(1.0 - cNdotV, 5.0); + + diffuse_brdf_NL = lightScatter * viewScatter * energyFactor; + */ + } +#else + // lambert + diffuse_brdf_NL = cNdotL * (1.0 / M_PI); +#endif + + diffuse_light += light_color * diffuse_color * diffuse_brdf_NL * attenuation; + +#if defined(LIGHT_TRANSMISSION_USED) + diffuse_light += light_color * diffuse_color * (vec3(1.0 / M_PI) - diffuse_brdf_NL) * transmission * attenuation; +#endif + +#if defined(LIGHT_RIM_USED) + float rim_light = pow(max(0.0, 1.0 - cNdotV), max(0.0, (1.0 - roughness) * 16.0)); + diffuse_light += rim_light * rim * mix(vec3(1.0), diffuse_color, rim_tint) * light_color; +#endif + } + + if (roughness > 0.0) { // FIXME: roughness == 0 should not disable specular light entirely + + // D + +#if defined(SPECULAR_BLINN) + + //normalized blinn + float shininess = exp2(15.0 * (1.0 - roughness) + 1.0) * 0.25; + float blinn = pow(cNdotH, shininess) * cNdotL; + blinn *= (shininess + 8.0) * (1.0 / (8.0 * M_PI)); + float intensity = blinn; + + specular_light += light_color * intensity * specular_blob_intensity * attenuation; + +#elif defined(SPECULAR_PHONG) + + vec3 R = normalize(-reflect(L, N)); + float cRdotV = max(0.0, dot(R, V)); + float shininess = exp2(15.0 * (1.0 - roughness) + 1.0) * 0.25; + float phong = pow(cRdotV, shininess); + phong *= (shininess + 8.0) * (1.0 / (8.0 * M_PI)); + float intensity = (phong) / max(4.0 * cNdotV * cNdotL, 0.75); + + specular_light += light_color * intensity * specular_blob_intensity * attenuation; + +#elif defined(SPECULAR_TOON) + + vec3 R = normalize(-reflect(L, N)); + float RdotV = dot(R, V); + float mid = 1.0 - roughness; + mid *= mid; + float intensity = smoothstep(mid - roughness * 0.5, mid + roughness * 0.5, RdotV) * mid; + diffuse_light += light_color * intensity * specular_blob_intensity * attenuation; // write to diffuse_light, as in toon shading you generally want no reflection + +#elif defined(SPECULAR_DISABLED) + // none.. + +#elif defined(SPECULAR_SCHLICK_GGX) + // shlick+ggx as default + +#if defined(LIGHT_ANISOTROPY_USED) + + float alpha_ggx = roughness * roughness; + float aspect = sqrt(1.0 - anisotropy * 0.9); + float ax = alpha_ggx / aspect; + float ay = alpha_ggx * aspect; + float XdotH = dot(T, H); + float YdotH = dot(B, H); + float D = D_GGX_anisotropic(cNdotH, ax, ay, XdotH, YdotH); + float G = G_GGX_anisotropic_2cos(cNdotL, ax, ay, XdotH, YdotH) * G_GGX_anisotropic_2cos(cNdotV, ax, ay, XdotH, YdotH); + +#else + float alpha_ggx = roughness * roughness; + float D = D_GGX(cNdotH, alpha_ggx); + float G = G_GGX_2cos(cNdotL, alpha_ggx) * G_GGX_2cos(cNdotV, alpha_ggx); +#endif + // F + vec3 f0 = F0(metallic, specular, diffuse_color); + float cLdotH5 = SchlickFresnel(cLdotH); + vec3 F = mix(vec3(cLdotH5), vec3(1.0), f0); + + vec3 specular_brdf_NL = cNdotL * D * F * G; + + specular_light += specular_brdf_NL * light_color * specular_blob_intensity * attenuation; +#endif + +#if defined(LIGHT_CLEARCOAT_USED) + +#if !defined(SPECULAR_SCHLICK_GGX) + float cLdotH5 = SchlickFresnel(cLdotH); +#endif + float Dr = GTR1(cNdotH, mix(.1, .001, clearcoat_gloss)); + float Fr = mix(.04, 1.0, cLdotH5); + float Gr = G_GGX_2cos(cNdotL, .25) * G_GGX_2cos(cNdotV, .25); + + float clearcoat_specular_brdf_NL = 0.25 * clearcoat * Gr * Fr * Dr * cNdotL; + + specular_light += clearcoat_specular_brdf_NL * light_color * specular_blob_intensity * attenuation; +#endif + } + +#ifdef USE_SHADOW_TO_OPACITY + alpha = min(alpha, clamp(1.0 - length(attenuation), 0.0, 1.0)); +#endif + +#endif //defined(USE_LIGHT_SHADER_CODE) +} + +#ifndef USE_NO_SHADOWS + +float sample_shadow(texture2D shadow, vec2 shadow_pixel_size, vec4 coord) { + + //todo optimize + vec2 pos = coord.xy; + float depth = coord.z; + +#ifdef SHADOW_MODE_PCF_13 + + float avg = textureProj(shadow, vec4(pos, depth, 1.0)); + avg += textureProj(sampler2DShadow(shadow, shadow_sampler), vec4(pos + vec2(shadow_pixel_size.x, 0.0), depth, 1.0)); + avg += textureProj(sampler2DShadow(shadow, shadow_sampler), vec4(pos + vec2(-shadow_pixel_size.x, 0.0), depth, 1.0)); + avg += textureProj(sampler2DShadow(shadow, shadow_sampler), vec4(pos + vec2(0.0, shadow_pixel_size.y), depth, 1.0)); + avg += textureProj(sampler2DShadow(shadow, shadow_sampler), vec4(pos + vec2(0.0, -shadow_pixel_size.y), depth, 1.0)); + avg += textureProj(sampler2DShadow(shadow, shadow_sampler), vec4(pos + vec2(shadow_pixel_size.x, shadow_pixel_size.y), depth, 1.0)); + avg += textureProj(sampler2DShadow(shadow, shadow_sampler), vec4(pos + vec2(-shadow_pixel_size.x, shadow_pixel_size.y), depth, 1.0)); + avg += textureProj(sampler2DShadow(shadow, shadow_sampler), vec4(pos + vec2(shadow_pixel_size.x, -shadow_pixel_size.y), depth, 1.0)); + avg += textureProj(sampler2DShadow(shadow, shadow_sampler), vec4(pos + vec2(-shadow_pixel_size.x, -shadow_pixel_size.y), depth, 1.0)); + avg += textureProj(sampler2DShadow(shadow, shadow_sampler), vec4(pos + vec2(shadow_pixel_size.x * 2.0, 0.0), depth, 1.0)); + avg += textureProj(sampler2DShadow(shadow, shadow_sampler), vec4(pos + vec2(-shadow_pixel_size.x * 2.0, 0.0), depth, 1.0)); + avg += textureProj(sampler2DShadow(shadow, shadow_sampler), vec4(pos + vec2(0.0, shadow_pixel_size.y * 2.0), depth, 1.0)); + avg += textureProj(sampler2DShadow(shadow, shadow_sampler), vec4(pos + vec2(0.0, -shadow_pixel_size.y * 2.0), depth, 1.0)); + return avg * (1.0 / 13.0); +#endif + +#ifdef SHADOW_MODE_PCF_5 + + float avg = textureProj(sampler2DShadow(shadow, shadow_sampler), vec4(pos, depth, 1.0)); + avg += textureProj(sampler2DShadow(shadow, shadow_sampler), vec4(pos + vec2(shadow_pixel_size.x, 0.0), depth, 1.0)); + avg += textureProj(sampler2DShadow(shadow, shadow_sampler), vec4(pos + vec2(-shadow_pixel_size.x, 0.0), depth, 1.0)); + avg += textureProj(sampler2DShadow(shadow, shadow_sampler), vec4(pos + vec2(0.0, shadow_pixel_size.y), depth, 1.0)); + avg += textureProj(sampler2DShadow(shadow, shadow_sampler), vec4(pos + vec2(0.0, -shadow_pixel_size.y), depth, 1.0)); + return avg * (1.0 / 5.0); + +#endif + +#if !defined(SHADOW_MODE_PCF_5) || !defined(SHADOW_MODE_PCF_13) + + return textureProj(sampler2DShadow(shadow, shadow_sampler), vec4(pos, depth, 1.0)); + +#endif +} + +#endif //USE_NO_SHADOWS + +void light_process_omni(uint idx, vec3 vertex, vec3 eye_vec, vec3 normal, vec3 albedo, float roughness, float metallic, float specular, float p_blob_intensity, +#ifdef LIGHT_TRANSMISSION_USED + vec3 transmission, +#endif +#ifdef LIGHT_RIM_USED + float rim, float rim_tint, +#endif +#ifdef LIGHT_CLEARCOAT_USED + float clearcoat, float clearcoat_gloss, +#endif +#ifdef LIGHT_ANISOTROPY_USED + vec3 binormal, vec3 tangent, float anisotropy, +#endif +#ifdef USE_SHADOW_TO_OPACITY + inout float alpha, +#endif + inout vec3 diffuse_light, inout vec3 specular_light) { + + vec3 light_rel_vec = lights.data[idx].position - vertex; + float light_length = length(light_rel_vec); + float normalized_distance = light_length * lights.data[idx].inv_radius; + vec2 attenuation_energy = unpackHalf2x16(lights.data[idx].attenuation_energy); + float omni_attenuation = pow(max(1.0 - normalized_distance, 0.0), attenuation_energy.x); + vec3 light_attenuation = vec3(omni_attenuation); + vec4 color_specular = unpackUnorm4x8(lights.data[idx].color_specular); + color_specular.rgb *= attenuation_energy.y; + +#ifndef USE_NO_SHADOWS + vec4 shadow_color_enabled = unpackUnorm4x8(lights.data[idx].shadow_color_enabled); + if (shadow_color_enabled.w > 0.5) { + // there is a shadowmap + + vec4 splane = (lights.data[idx].shadow_matrix * vec4(vertex, 1.0)); + float shadow_len = length(splane); + splane = normalize(splane); + vec4 clamp_rect = lights.data[idx].atlas_rect; + + if (splane.z >= 0.0) { + + splane.z += 1.0; + + clamp_rect.y += clamp_rect.w; + + } else { + + splane.z = 1.0 - splane.z; + } + + splane.xy /= splane.z; + splane.xy = splane.xy * 0.5 + 0.5; + splane.z = shadow_len * lights.data[idx].inv_radius; + splane.xy = clamp_rect.xy + splane.xy * clamp_rect.zw; + splane.w = 1.0; //needed? i think it should be 1 already + float shadow = sample_shadow(shadow_atlas, scene_data.shadow_atlas_pixel_size, splane); + + light_attenuation *= mix(shadow_color_enabled.rgb, vec3(1.0), shadow); + } +#endif //USE_NO_SHADOWS + + light_compute(normal, normalize(light_rel_vec), eye_vec, color_specular.rgb, light_attenuation, albedo, roughness, metallic, specular, color_specular.a * p_blob_intensity, +#ifdef LIGHT_TRANSMISSION_USED + transmission, +#endif +#ifdef LIGHT_RIM_USED + rim * omni_attenuation, rim_tint, +#endif +#ifdef LIGHT_CLEARCOAT_USED + clearcoat, clearcoat_gloss, +#endif +#ifdef LIGHT_ANISOTROPY_USED + binormal, tangent, anisotropy, +#endif +#ifdef USE_SHADOW_TO_OPACITY + alpha, +#endif + diffuse_light, + specular_light); +} + +void light_process_spot(uint idx, vec3 vertex, vec3 eye_vec, vec3 normal, vec3 albedo, float roughness, float metallic, float specular, float p_blob_intensity, +#ifdef LIGHT_TRANSMISSION_USED + vec3 transmission, +#endif +#ifdef LIGHT_RIM_USED + float rim, float rim_tint, +#endif +#ifdef LIGHT_CLEARCOAT_USED + float clearcoat, float clearcoat_gloss, +#endif +#ifdef LIGHT_ANISOTROPY_USED + vec3 binormal, vec3 tangent, float anisotropy, +#endif +#ifdef USE_SHADOW_TO_OPACITY + inout float alpha, +#endif + inout vec3 diffuse_light, + inout vec3 specular_light) { + + vec3 light_rel_vec = lights.data[idx].position - vertex; + float light_length = length(light_rel_vec); + float normalized_distance = light_length * lights.data[idx].inv_radius; + vec2 attenuation_energy = unpackHalf2x16(lights.data[idx].attenuation_energy); + float spot_attenuation = pow(max(1.0 - normalized_distance, 0.001), attenuation_energy.x); + vec3 spot_dir = lights.data[idx].direction; + vec2 spot_att_angle = unpackHalf2x16(lights.data[idx].cone_attenuation_angle); + float scos = max(dot(-normalize(light_rel_vec), spot_dir), spot_att_angle.y); + float spot_rim = max(0.0001, (1.0 - scos) / (1.0 - spot_att_angle.y)); + spot_attenuation *= 1.0 - pow(spot_rim, spot_att_angle.x); + vec3 light_attenuation = vec3(spot_attenuation); + vec4 color_specular = unpackUnorm4x8(lights.data[idx].color_specular); + color_specular.rgb *= attenuation_energy.y; + +/* + if (lights.data[idx].atlas_rect!=vec4(0.0)) { + //use projector texture + } + */ +#ifndef USE_NO_SHADOWS + vec4 shadow_color_enabled = unpackUnorm4x8(lights.data[idx].shadow_color_enabled); + if (shadow_color_enabled.w > 0.5) { + //there is a shadowmap + vec4 splane = (lights.data[idx].shadow_matrix * vec4(vertex, 1.0)); + splane /= splane.w; + float shadow = sample_shadow(shadow_atlas, scene_data.shadow_atlas_pixel_size, splane); + + light_attenuation *= mix(shadow_color_enabled.rgb, vec3(1.0), shadow); + } + +#endif //USE_NO_SHADOWS + + light_compute(normal, normalize(light_rel_vec), eye_vec, color_specular.rgb, light_attenuation, albedo, roughness, metallic, specular, color_specular.a * p_blob_intensity, +#ifdef LIGHT_TRANSMISSION_USED + transmission, +#endif +#ifdef LIGHT_RIM_USED + rim * spot_attenuation, rim_tint, +#endif +#ifdef LIGHT_CLEARCOAT_USED + clearcoat, clearcoat_gloss, +#endif +#ifdef LIGHT_ANISOTROPY_USED + binormal, tangent, anisotropy, +#endif +#ifdef USE_SHADOW_TO_OPACITY + alpha, +#endif + diffuse_light, specular_light); +} + +void reflection_process(uint ref_index, vec3 vertex, vec3 normal, float roughness, vec3 ambient_light, vec3 specular_light, inout vec4 ambient_accum, inout vec4 reflection_accum) { + + vec3 box_extents = reflections.data[ref_index].box_extents; + vec3 local_pos = (reflections.data[ref_index].local_matrix * vec4(vertex, 1.0)).xyz; + + if (any(greaterThan(abs(local_pos), box_extents))) { //out of the reflection box + return; + } + + vec3 ref_vec = normalize(reflect(vertex, normal)); + + vec3 inner_pos = abs(local_pos / box_extents); + float blend = max(inner_pos.x, max(inner_pos.y, inner_pos.z)); + //make blend more rounded + blend = mix(length(inner_pos), blend, blend); + blend *= blend; + blend = max(0.0, 1.0 - blend); + + if (reflections.data[ref_index].params.x > 0.0) { // compute reflection + + vec3 local_ref_vec = (reflections.data[ref_index].local_matrix * vec4(ref_vec, 0.0)).xyz; + + if (reflections.data[ref_index].params.w > 0.5) { //box project + + vec3 nrdir = normalize(local_ref_vec); + vec3 rbmax = (box_extents - local_pos) / nrdir; + vec3 rbmin = (-box_extents - local_pos) / nrdir; + + vec3 rbminmax = mix(rbmin, rbmax, greaterThan(nrdir, vec3(0.0, 0.0, 0.0))); + + float fa = min(min(rbminmax.x, rbminmax.y), rbminmax.z); + vec3 posonbox = local_pos + nrdir * fa; + local_ref_vec = posonbox - reflections.data[ref_index].box_offset; + } + + vec4 reflection; + + reflection.rgb = textureLod(samplerCubeArray(reflection_atlas, material_samplers[SAMPLER_LINEAR_WITH_MIPMAPS_CLAMP]), vec4(local_ref_vec, reflections.data[ref_index].index), roughness * MAX_ROUGHNESS_LOD).rgb; + + if (reflections.data[ref_index].params.z < 0.5) { + reflection.rgb = mix(specular_light, reflection.rgb, blend); + } + + reflection.rgb *= reflections.data[ref_index].params.x; + reflection.a = blend; + reflection.rgb *= reflection.a; + + reflection_accum += reflection; + } + +#if !defined(USE_LIGHTMAP) && !defined(USE_VOXEL_CONE_TRACING) + if (reflections.data[ref_index].ambient.a > 0.0) { //compute ambient using skybox + + vec3 local_amb_vec = (reflections.data[ref_index].local_matrix * vec4(normal, 0.0)).xyz; + + vec4 ambient_out; + + ambient_out.rgb = textureLod(samplerCubeArray(reflection_atlas, material_samplers[SAMPLER_LINEAR_WITH_MIPMAPS_CLAMP]), vec4(local_amb_vec, reflections.data[ref_index].index), MAX_ROUGHNESS_LOD).rgb; + + ambient_out.a = blend; + ambient_out.rgb = mix(reflections.data[ref_index].ambient.rgb, ambient_out.rgb, reflections.data[ref_index].ambient.a); + if (reflections.data[ref_index].params.z < 0.5) { + ambient_out.rgb = mix(ambient_light, ambient_out.rgb, blend); + } + + ambient_out.rgb *= ambient_out.a; + ambient_accum += ambient_out; + } else { + + vec4 ambient_out; + ambient_out.a = blend; + ambient_out.rgb = reflections.data[ref_index].ambient.rgb; + if (reflections.data[ref_index].params.z < 0.5) { + ambient_out.rgb = mix(ambient_light, ambient_out.rgb, blend); + } + ambient_out.rgb *= ambient_out.a; + ambient_accum += ambient_out; + } +#endif //USE_LIGHTMAP or VCT +} + +#ifdef USE_VOXEL_CONE_TRACING + +//standard voxel cone trace +vec4 voxel_cone_trace(texture3D probe, vec3 cell_size, vec3 pos, vec3 direction, float tan_half_angle, float max_distance, float p_bias) { + + float dist = p_bias; + vec4 color = vec4(0.0); + + while (dist < max_distance && color.a < 0.95) { + float diameter = max(1.0, 2.0 * tan_half_angle * dist); + vec3 uvw_pos = (pos + dist * direction) * cell_size; + float half_diameter = diameter * 0.5; + //check if outside, then break + if (any(greaterThan(abs(uvw_pos - 0.5), vec3(0.5f + half_diameter * cell_size)))) { + break; + } + vec4 scolor = textureLod(sampler3D(probe, material_samplers[SAMPLER_LINEAR_WITH_MIPMAPS_CLAMP]), uvw_pos, log2(diameter)); + float a = (1.0 - color.a); + color += a * scolor; + dist += half_diameter; + } + + return color; +} + +#ifndef GI_PROBE_HIGH_QUALITY +//faster version for 45 degrees + +#ifdef GI_PROBE_USE_ANISOTROPY + +vec4 voxel_cone_trace_anisotropic_45_degrees(texture3D probe, texture3D aniso_pos, texture3D aniso_neg, vec3 normal, vec3 cell_size, vec3 pos, vec3 direction, float tan_half_angle, float max_distance, float p_bias) { + + float dist = p_bias; + vec4 color = vec4(0.0); + float radius = max(0.5, tan_half_angle * dist); + float lod_level = log2(radius * 2.0); + + while (dist < max_distance && color.a < 0.95) { + vec3 uvw_pos = (pos + dist * direction) * cell_size; + //check if outside, then break + if (any(greaterThan(abs(uvw_pos - 0.5), vec3(0.5f + radius * cell_size)))) { + break; + } + + vec4 scolor = textureLod(sampler3D(probe, material_samplers[SAMPLER_LINEAR_WITH_MIPMAPS_CLAMP]), uvw_pos, lod_level); + vec3 aniso_neg = textureLod(sampler3D(aniso_neg, material_samplers[SAMPLER_LINEAR_WITH_MIPMAPS_CLAMP]), uvw_pos, lod_level).rgb; + vec3 aniso_pos = textureLod(sampler3D(aniso_pos, material_samplers[SAMPLER_LINEAR_WITH_MIPMAPS_CLAMP]), uvw_pos, lod_level).rgb; + + scolor.rgb *= dot(max(vec3(0.0), (normal * aniso_pos)), vec3(1.0)) + dot(max(vec3(0.0), (-normal * aniso_neg)), vec3(1.0)); + lod_level += 1.0; + + float a = (1.0 - color.a); + scolor *= a; + color += scolor; + dist += radius; + radius = max(0.5, tan_half_angle * dist); + } + + return color; +} +#else + +vec4 voxel_cone_trace_45_degrees(texture3D probe, vec3 cell_size, vec3 pos, vec3 direction, float tan_half_angle, float max_distance, float p_bias) { + + float dist = p_bias; + vec4 color = vec4(0.0); + float radius = max(0.5, tan_half_angle * dist); + float lod_level = log2(radius * 2.0); + + while (dist < max_distance && color.a < 0.95) { + vec3 uvw_pos = (pos + dist * direction) * cell_size; + + //check if outside, then break + if (any(greaterThan(abs(uvw_pos - 0.5), vec3(0.5f + radius * cell_size)))) { + break; + } + vec4 scolor = textureLod(sampler3D(probe, material_samplers[SAMPLER_LINEAR_WITH_MIPMAPS_CLAMP]), uvw_pos, lod_level); + lod_level += 1.0; + + float a = (1.0 - color.a); + scolor *= a; + color += scolor; + dist += radius; + radius = max(0.5, tan_half_angle * dist); + } + + return color; +} + +#endif + +#elif defined(GI_PROBE_USE_ANISOTROPY) + +//standard voxel cone trace +vec4 voxel_cone_trace_anisotropic(texture3D probe, texture3D aniso_pos, texture3D aniso_neg, vec3 normal, vec3 cell_size, vec3 pos, vec3 direction, float tan_half_angle, float max_distance, float p_bias) { + + float dist = p_bias; + vec4 color = vec4(0.0); + + while (dist < max_distance && color.a < 0.95) { + float diameter = max(1.0, 2.0 * tan_half_angle * dist); + vec3 uvw_pos = (pos + dist * direction) * cell_size; + float half_diameter = diameter * 0.5; + //check if outside, then break + if (any(greaterThan(abs(uvw_pos - 0.5), vec3(0.5f + half_diameter * cell_size)))) { + break; + } + float log2_diameter = log2(diameter); + vec4 scolor = textureLod(sampler3D(probe, material_samplers[SAMPLER_LINEAR_WITH_MIPMAPS_CLAMP]), uvw_pos, log2_diameter); + vec3 aniso_neg = textureLod(sampler3D(aniso_neg, material_samplers[SAMPLER_LINEAR_WITH_MIPMAPS_CLAMP]), uvw_pos, log2_diameter).rgb; + vec3 aniso_pos = textureLod(sampler3D(aniso_pos, material_samplers[SAMPLER_LINEAR_WITH_MIPMAPS_CLAMP]), uvw_pos, log2_diameter).rgb; + + scolor.rgb *= dot(max(vec3(0.0), (normal * aniso_pos)), vec3(1.0)) + dot(max(vec3(0.0), (-normal * aniso_neg)), vec3(1.0)); + + float a = (1.0 - color.a); + scolor *= a; + color += scolor; + dist += half_diameter; + } + + return color; +} + +#endif + +void gi_probe_compute(uint index, vec3 position, vec3 normal, vec3 ref_vec, mat3 normal_xform, float roughness, vec3 ambient, vec3 environment, inout vec4 out_spec, inout vec4 out_diff) { + + position = (gi_probes.data[index].xform * vec4(position, 1.0)).xyz; + ref_vec = normalize((gi_probes.data[index].xform * vec4(ref_vec, 0.0)).xyz); + normal = normalize((gi_probes.data[index].xform * vec4(normal, 0.0)).xyz); + + position += normal * gi_probes.data[index].normal_bias; + + //this causes corrupted pixels, i have no idea why.. + if (any(bvec2(any(lessThan(position, vec3(0.0))), any(greaterThan(position, gi_probes.data[index].bounds))))) { + return; + } + + vec3 blendv = abs(position / gi_probes.data[index].bounds * 2.0 - 1.0); + float blend = clamp(1.0 - max(blendv.x, max(blendv.y, blendv.z)), 0.0, 1.0); + //float blend=1.0; + + float max_distance = length(gi_probes.data[index].bounds); + vec3 cell_size = 1.0 / gi_probes.data[index].bounds; + + //radiance + +#ifdef GI_PROBE_HIGH_QUALITY + +#define MAX_CONE_DIRS 6 + vec3 cone_dirs[MAX_CONE_DIRS] = vec3[]( + vec3(0.0, 0.0, 1.0), + vec3(0.866025, 0.0, 0.5), + vec3(0.267617, 0.823639, 0.5), + vec3(-0.700629, 0.509037, 0.5), + vec3(-0.700629, -0.509037, 0.5), + vec3(0.267617, -0.823639, 0.5)); + + float cone_weights[MAX_CONE_DIRS] = float[](0.25, 0.15, 0.15, 0.15, 0.15, 0.15); + float cone_angle_tan = 0.577; + +#elif defined(GI_PROBE_LOW_QUALITY) + +#define MAX_CONE_DIRS 1 + + vec3 cone_dirs[MAX_CONE_DIRS] = vec3[]( + vec3(0.0, 0.0, 1.0)); + + float cone_weights[MAX_CONE_DIRS] = float[](1.0); + float cone_angle_tan = 4; //~76 degrees +#else // MEDIUM QUALITY + +#define MAX_CONE_DIRS 4 + + vec3 cone_dirs[MAX_CONE_DIRS] = vec3[]( + vec3(0.707107, 0.0, 0.707107), + vec3(0.0, 0.707107, 0.707107), + vec3(-0.707107, 0.0, 0.707107), + vec3(0.0, -0.707107, 0.707107)); + + float cone_weights[MAX_CONE_DIRS] = float[](0.25, 0.25, 0.25, 0.25); + float cone_angle_tan = 0.98269; + +#endif + vec3 light = vec3(0.0); + + for (int i = 0; i < MAX_CONE_DIRS; i++) { + + vec3 dir = normalize((gi_probes.data[index].xform * vec4(normal_xform * cone_dirs[i], 0.0)).xyz); + +#if defined(GI_PROBE_HIGH_QUALITY) || defined(GI_PROBE_LOW_QUALITY) + +#ifdef GI_PROBE_USE_ANISOTROPY + vec4 cone_light = voxel_cone_trace_anisotropic(gi_probe_textures[gi_probes.data[index].texture_slot], gi_probe_textures[gi_probes.data[index].texture_slot + 1], gi_probe_textures[gi_probes.data[index].texture_slot + 2], normalize(mix(dir, normal, gi_probes.data[index].anisotropy_strength)), cell_size, position, dir, cone_angle_tan, max_distance, gi_probes.data[index].bias); +#else + + vec4 cone_light = voxel_cone_trace(gi_probe_textures[gi_probes.data[index].texture_slot], cell_size, position, dir, cone_angle_tan, max_distance, gi_probes.data[index].bias); + +#endif // GI_PROBE_USE_ANISOTROPY + +#else + +#ifdef GI_PROBE_USE_ANISOTROPY + vec4 cone_light = voxel_cone_trace_anisotropic_45_degrees(gi_probe_textures[gi_probes.data[index].texture_slot], gi_probe_textures[gi_probes.data[index].texture_slot + 1], gi_probe_textures[gi_probes.data[index].texture_slot + 2], normalize(mix(dir, normal, gi_probes.data[index].anisotropy_strength)), cell_size, position, dir, cone_angle_tan, max_distance, gi_probes.data[index].bias); +#else + vec4 cone_light = voxel_cone_trace_45_degrees(gi_probe_textures[gi_probes.data[index].texture_slot], cell_size, position, dir, cone_angle_tan, max_distance, gi_probes.data[index].bias); +#endif // GI_PROBE_USE_ANISOTROPY + +#endif + if (gi_probes.data[index].blend_ambient) { + cone_light.rgb = mix(ambient, cone_light.rgb, min(1.0, cone_light.a / 0.95)); + } + + light += cone_weights[i] * cone_light.rgb; + } + + light *= gi_probes.data[index].dynamic_range; + + if (gi_probes.data[index].ambient_occlusion > 0.001) { + + float size = 1.0 + gi_probes.data[index].ambient_occlusion_size * 7.0; + + float taps, blend; + blend = modf(size, taps); + float ao = 0.0; + for (float i = 1.0; i <= taps; i++) { + vec3 ofs = (position + normal * (i * 0.5 + 1.0)) * cell_size; + ao += textureLod(sampler3D(gi_probe_textures[gi_probes.data[index].texture_slot], material_samplers[SAMPLER_LINEAR_WITH_MIPMAPS_CLAMP]), ofs, i - 1.0).a * i; + } + + if (blend > 0.001) { + vec3 ofs = (position + normal * ((taps + 1.0) * 0.5 + 1.0)) * cell_size; + ao += textureLod(sampler3D(gi_probe_textures[gi_probes.data[index].texture_slot], material_samplers[SAMPLER_LINEAR_WITH_MIPMAPS_CLAMP]), ofs, taps).a * (taps + 1.0) * blend; + } + + ao = 1.0 - min(1.0, ao); + + light = mix(scene_data.ao_color.rgb, light, mix(1.0, ao, gi_probes.data[index].ambient_occlusion)); + } + + out_diff += vec4(light * blend, blend); + + //irradiance +#ifndef GI_PROBE_LOW_QUALITY + vec4 irr_light = voxel_cone_trace(gi_probe_textures[gi_probes.data[index].texture_slot], cell_size, position, ref_vec, tan(roughness * 0.5 * M_PI * 0.99), max_distance, gi_probes.data[index].bias); + if (gi_probes.data[index].blend_ambient) { + irr_light.rgb = mix(environment, irr_light.rgb, min(1.0, irr_light.a / 0.95)); + } + irr_light.rgb *= gi_probes.data[index].dynamic_range; + //irr_light=vec3(0.0); + + out_spec += vec4(irr_light.rgb * blend, blend); +#endif +} + +#endif //USE_VOXEL_CONE_TRACING + +#endif //!defined(MODE_RENDER_DEPTH) && !defined(MODE_UNSHADED) + +void main() { + +#ifdef MODE_DUAL_PARABOLOID + + if (dp_clip > 0.0) + discard; +#endif + + //lay out everything, whathever is unused is optimized away anyway + vec3 vertex = vertex_interp; + vec3 view = -normalize(vertex_interp); + vec3 albedo = vec3(1.0); + vec3 transmission = vec3(0.0); + float metallic = 0.0; + float specular = 0.5; + vec3 emission = vec3(0.0); + float roughness = 1.0; + float rim = 0.0; + float rim_tint = 0.0; + float clearcoat = 0.0; + float clearcoat_gloss = 0.0; + float anisotropy = 0.0; + vec2 anisotropy_flow = vec2(1.0, 0.0); + +#if defined(AO_USED) + float ao = 1.0; + float ao_light_affect = 0.0; +#endif + + float alpha = 1.0; + +#if defined(ALPHA_SCISSOR_USED) + float alpha_scissor = 0.5; +#endif + +#if defined(TANGENT_USED) || defined(NORMALMAP_USED) || defined(LIGHT_ANISOTROPY_USED) + vec3 binormal = normalize(binormal_interp); + vec3 tangent = normalize(tangent_interp); +#else + vec3 binormal = vec3(0.0); + vec3 tangent = vec3(0.0); +#endif + vec3 normal = normalize(normal_interp); + +#if defined(DO_SIDE_CHECK) + if (!gl_FrontFacing) { + normal = -normal; + } +#endif + +#if defined(UV_USED) + vec2 uv = uv_interp; +#endif + +#if defined(UV2_USED) || defined(USE_LIGHTMAP) + vec2 uv2 = uv2_interp; +#endif + +#if defined(COLOR_USED) + vec4 color = color_interp; +#endif + +#if defined(NORMALMAP_USED) + + vec3 normalmap = vec3(0.5); +#endif + + float normaldepth = 1.0; + + vec2 screen_uv = gl_FragCoord.xy * scene_data.screen_pixel_size + scene_data.screen_pixel_size * 0.5; //account for center + + float sss_strength = 0.0; + + { + /* clang-format off */ + +FRAGMENT_SHADER_CODE + + /* clang-format on */ + } + +#if !defined(USE_SHADOW_TO_OPACITY) + +#if defined(ALPHA_SCISSOR_USED) + if (alpha < alpha_scissor) { + discard; + } +#endif // ALPHA_SCISSOR_USED + +#ifdef USE_OPAQUE_PREPASS + + if (alpha < opaque_prepass_threshold) { + discard; + } + +#endif // USE_OPAQUE_PREPASS + +#endif // !USE_SHADOW_TO_OPACITY + +#if defined(NORMALMAP_USED) + + normalmap.xy = normalmap.xy * 2.0 - 1.0; + normalmap.z = sqrt(max(0.0, 1.0 - dot(normalmap.xy, normalmap.xy))); //always ignore Z, as it can be RG packed, Z may be pos/neg, etc. + + normal = normalize(mix(normal, tangent * normalmap.x + binormal * normalmap.y + normal * normalmap.z, normaldepth)); + +#endif + +#if defined(LIGHT_ANISOTROPY_USED) + + if (anisotropy > 0.01) { + //rotation matrix + mat3 rot = mat3(tangent, binormal, normal); + //make local to space + tangent = normalize(rot * vec3(anisotropy_flow.x, anisotropy_flow.y, 0.0)); + binormal = normalize(rot * vec3(-anisotropy_flow.y, anisotropy_flow.x, 0.0)); + } + +#endif + +#ifdef ENABLE_CLIP_ALPHA + if (albedo.a < 0.99) { + //used for doublepass and shadowmapping + discard; + } +#endif + + /////////////////////// LIGHTING ////////////////////////////// + + //apply energy conservation + + vec3 specular_light = vec3(0.0, 0.0, 0.0); + vec3 diffuse_light = vec3(0.0, 0.0, 0.0); + vec3 ambient_light = vec3(0.0, 0.0, 0.0); + +#if !defined(MODE_RENDER_DEPTH) && !defined(MODE_UNSHADED) + + if (scene_data.roughness_limiter_enabled) { + float limit = texelFetch(sampler2D(roughness_buffer, material_samplers[SAMPLER_NEAREST_CLAMP]), ivec2(gl_FragCoord.xy), 0).r; + roughness = max(roughness, limit); + } + + if (scene_data.use_reflection_cubemap) { + + vec3 ref_vec = reflect(-view, normal); + ref_vec = scene_data.radiance_inverse_xform * ref_vec; +#ifdef USE_RADIANCE_CUBEMAP_ARRAY + + float lod, blend; + blend = modf(roughness * MAX_ROUGHNESS_LOD, lod); + specular_light = texture(samplerCubeArray(radiance_cubemap, material_samplers[SAMPLER_LINEAR_WITH_MIPMAPS_CLAMP]), vec4(ref_vec, lod)).rgb; + specular_light = mix(specular_light, texture(samplerCubeArray(radiance_cubemap, material_samplers[SAMPLER_LINEAR_WITH_MIPMAPS_CLAMP]), vec4(ref_vec, lod + 1)).rgb, blend); + +#else + specular_light = textureLod(samplerCube(radiance_cubemap, material_samplers[SAMPLER_LINEAR_WITH_MIPMAPS_CLAMP]), ref_vec, roughness * MAX_ROUGHNESS_LOD).rgb; + +#endif //USE_RADIANCE_CUBEMAP_ARRAY + specular_light *= scene_data.ambient_light_color_energy.a; + } + +#ifndef USE_LIGHTMAP + //lightmap overrides everything + if (scene_data.use_ambient_light) { + + ambient_light = scene_data.ambient_light_color_energy.rgb; + + if (scene_data.use_ambient_cubemap) { + vec3 ambient_dir = scene_data.radiance_inverse_xform * normal; +#ifdef USE_RADIANCE_CUBEMAP_ARRAY + vec3 cubemap_ambient = texture(samplerCubeArray(radiance_cubemap, material_samplers[SAMPLER_LINEAR_WITH_MIPMAPS_CLAMP]), vec4(ambient_dir, MAX_ROUGHNESS_LOD)).rgb; +#else + vec3 cubemap_ambient = textureLod(samplerCube(radiance_cubemap, material_samplers[SAMPLER_LINEAR_WITH_MIPMAPS_CLAMP]), ambient_dir, MAX_ROUGHNESS_LOD).rgb; +#endif //USE_RADIANCE_CUBEMAP_ARRAY + + ambient_light = mix(ambient_light, cubemap_ambient * scene_data.ambient_light_color_energy.a, scene_data.ambient_color_sky_mix); + } + } +#endif // USE_LIGHTMAP + +#endif //!defined(MODE_RENDER_DEPTH) && !defined(MODE_UNSHADED) + + //radiance + + float specular_blob_intensity = 1.0; + +#if defined(SPECULAR_TOON) + specular_blob_intensity *= specular * 2.0; +#endif + +#if !defined(MODE_RENDER_DEPTH) && !defined(MODE_UNSHADED) + //gi probes + + //lightmap + + //lightmap capture + +#ifdef USE_VOXEL_CONE_TRACING + { // process giprobes + uint index1 = instances.data[instance_index].gi_offset & 0xFFFF; + if (index1 != 0xFFFF) { + vec3 ref_vec = normalize(reflect(normalize(vertex), normal)); + //find arbitrary tangent and bitangent, then build a matrix + vec3 v0 = abs(normal.z) < 0.999 ? vec3(0.0, 0.0, 1.0) : vec3(0.0, 1.0, 0.0); + vec3 tangent = normalize(cross(v0, normal)); + vec3 bitangent = normalize(cross(tangent, normal)); + mat3 normal_mat = mat3(tangent, bitangent, normal); + + vec4 amb_accum = vec4(0.0); + vec4 spec_accum = vec4(0.0); + gi_probe_compute(index1, vertex, normal, ref_vec, normal_mat, roughness * roughness, ambient_light, specular_light, spec_accum, amb_accum); + + uint index2 = instances.data[instance_index].gi_offset >> 16; + + if (index2 != 0xFFFF) { + gi_probe_compute(index2, vertex, normal, ref_vec, normal_mat, roughness * roughness, ambient_light, specular_light, spec_accum, amb_accum); + } + + if (amb_accum.a > 0.0) { + amb_accum.rgb /= amb_accum.a; + } + + if (spec_accum.a > 0.0) { + spec_accum.rgb /= spec_accum.a; + } + + specular_light = spec_accum.rgb; + ambient_light = amb_accum.rgb; + } + } +#endif + + uvec4 cluster_cell = texture(usampler3D(cluster_texture, material_samplers[SAMPLER_NEAREST_CLAMP]), vec3(screen_uv, (abs(vertex.z) - scene_data.z_near) / (scene_data.z_far - scene_data.z_near))); + + { // process reflections + + vec4 reflection_accum = vec4(0.0, 0.0, 0.0, 0.0); + vec4 ambient_accum = vec4(0.0, 0.0, 0.0, 0.0); + + uint reflection_probe_count = cluster_cell.z >> CLUSTER_COUNTER_SHIFT; + uint reflection_probe_pointer = cluster_cell.z & CLUSTER_POINTER_MASK; + + for (uint i = 0; i < reflection_probe_count; i++) { + + uint ref_index = cluster_data.indices[reflection_probe_pointer + i]; + reflection_process(ref_index, vertex, normal, roughness, ambient_light, specular_light, ambient_accum, reflection_accum); + } + + if (reflection_accum.a > 0.0) { + specular_light = reflection_accum.rgb / reflection_accum.a; + } + +#if !defined(USE_LIGHTMAP) + if (ambient_accum.a > 0.0) { + ambient_light = ambient_accum.rgb / ambient_accum.a; + } +#endif + } + + { + +#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, GI, and reflection probes are added + // Environment brdf approximation (Lazarov 2013) + // see https://www.unrealengine.com/en-US/blog/physically-based-shading-on-mobile + 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, view), 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 + } + + { //directional light + + for (uint i = 0; i < scene_data.directional_light_count; i++) { + + if (!bool(directional_lights.data[i].mask & instances.data[instance_index].layer_mask)) { + continue; //not masked + } + + vec3 light_attenuation = vec3(1.0); + + if (directional_lights.data[i].shadow_enabled) { + float depth_z = -vertex.z; + + vec4 pssm_coord; + + if (depth_z < directional_lights.data[i].shadow_split_offsets.x) { + pssm_coord = (directional_lights.data[i].shadow_matrix1 * vec4(vertex, 1.0)); + } else if (depth_z < directional_lights.data[i].shadow_split_offsets.y) { + pssm_coord = (directional_lights.data[i].shadow_matrix2 * vec4(vertex, 1.0)); + } else if (depth_z < directional_lights.data[i].shadow_split_offsets.z) { + pssm_coord = (directional_lights.data[i].shadow_matrix3 * vec4(vertex, 1.0)); + } else { + pssm_coord = (directional_lights.data[i].shadow_matrix4 * vec4(vertex, 1.0)); + } + + pssm_coord /= pssm_coord.w; + + float shadow = sample_shadow(directional_shadow_atlas, scene_data.directional_shadow_pixel_size, pssm_coord); + + if (directional_lights.data[i].blend_splits) { + + float pssm_blend; + + if (depth_z < directional_lights.data[i].shadow_split_offsets.x) { + pssm_coord = (directional_lights.data[i].shadow_matrix2 * vec4(vertex, 1.0)); + pssm_blend = smoothstep(0.0, directional_lights.data[i].shadow_split_offsets.x, depth_z); + } else if (depth_z < directional_lights.data[i].shadow_split_offsets.y) { + pssm_coord = (directional_lights.data[i].shadow_matrix3 * vec4(vertex, 1.0)); + pssm_blend = smoothstep(directional_lights.data[i].shadow_split_offsets.x, directional_lights.data[i].shadow_split_offsets.y, depth_z); + } else if (depth_z < directional_lights.data[i].shadow_split_offsets.z) { + pssm_coord = (directional_lights.data[i].shadow_matrix4 * vec4(vertex, 1.0)); + pssm_blend = smoothstep(directional_lights.data[i].shadow_split_offsets.y, directional_lights.data[i].shadow_split_offsets.z, depth_z); + } else { + pssm_blend = 0.0; //if no blend, same coord will be used (divide by z will result in same value, and already cached) + } + + pssm_coord /= pssm_coord.w; + + float shadow2 = sample_shadow(directional_shadow_atlas, scene_data.directional_shadow_pixel_size, pssm_coord); + shadow = mix(shadow, shadow2, pssm_blend); + } + + shadow = mix(shadow, 1.0, smoothstep(directional_lights.data[i].fade_from, directional_lights.data[i].fade_to, vertex.z)); //done with negative values for performance + + light_attenuation = mix(directional_lights.data[i].shadow_color, vec3(1.0), shadow); + } + + light_compute(normal, directional_lights.data[i].direction, normalize(view), directional_lights.data[i].color * directional_lights.data[i].energy, light_attenuation, albedo, roughness, metallic, specular, directional_lights.data[i].specular * specular_blob_intensity, +#ifdef LIGHT_TRANSMISSION_USED + transmission, +#endif +#ifdef LIGHT_RIM_USED + rim, rim_tint, +#endif +#ifdef LIGHT_CLEARCOAT_USED + clearcoat, clearcoat_gloss, +#endif +#ifdef LIGHT_ANISOTROPY_USED + binormal, tangent, anisotropy, +#endif +#ifdef USE_SHADOW_TO_OPACITY + alpha, +#endif + diffuse_light, + specular_light); + } + } + + { //omni lights + + uint omni_light_count = cluster_cell.x >> CLUSTER_COUNTER_SHIFT; + uint omni_light_pointer = cluster_cell.x & CLUSTER_POINTER_MASK; + + for (uint i = 0; i < omni_light_count; i++) { + + uint light_index = cluster_data.indices[omni_light_pointer + i]; + + if (!bool(lights.data[light_index].mask & instances.data[instance_index].layer_mask)) { + continue; //not masked + } + + light_process_omni(light_index, vertex, view, normal, albedo, roughness, metallic, specular, specular_blob_intensity, +#ifdef LIGHT_TRANSMISSION_USED + transmission, +#endif +#ifdef LIGHT_RIM_USED + rim, + rim_tint, +#endif +#ifdef LIGHT_CLEARCOAT_USED + clearcoat, clearcoat_gloss, +#endif +#ifdef LIGHT_ANISOTROPY_USED + tangent, binormal, anisotropy, +#endif +#ifdef USE_SHADOW_TO_OPACITY + alpha, +#endif + diffuse_light, specular_light); + } + } + + { //spot lights + uint spot_light_count = cluster_cell.y >> CLUSTER_COUNTER_SHIFT; + uint spot_light_pointer = cluster_cell.y & CLUSTER_POINTER_MASK; + + for (uint i = 0; i < spot_light_count; i++) { + + uint light_index = cluster_data.indices[spot_light_pointer + i]; + + if (!bool(lights.data[light_index].mask & instances.data[instance_index].layer_mask)) { + continue; //not masked + } + + light_process_spot(light_index, vertex, view, normal, albedo, roughness, metallic, specular, specular_blob_intensity, +#ifdef LIGHT_TRANSMISSION_USED + transmission, +#endif +#ifdef LIGHT_RIM_USED + rim, + rim_tint, +#endif +#ifdef LIGHT_CLEARCOAT_USED + clearcoat, clearcoat_gloss, +#endif +#ifdef LIGHT_ANISOTROPY_USED + tangent, binormal, anisotropy, +#endif +#ifdef USE_SHADOW_TO_OPACITY + alpha, +#endif + diffuse_light, specular_light); + } + } + +#ifdef USE_SHADOW_TO_OPACITY + alpha = min(alpha, clamp(length(ambient_light), 0.0, 1.0)); + +#if defined(ALPHA_SCISSOR_USED) + if (alpha < alpha_scissor) { + discard; + } +#endif // ALPHA_SCISSOR_USED + +#ifdef USE_OPAQUE_PREPASS + + if (alpha < opaque_prepass_threshold) { + discard; + } + +#endif // USE_OPAQUE_PREPASS + +#endif // USE_SHADOW_TO_OPACITY + +#endif //!defined(MODE_RENDER_DEPTH) && !defined(MODE_UNSHADED) + +#ifdef MODE_RENDER_DEPTH + +#ifdef MODE_RENDER_MATERIAL + + albedo_output_buffer.rgb = albedo; + albedo_output_buffer.a = alpha; + + normal_output_buffer.rgb = normal * 0.5 + 0.5; + normal_output_buffer.a = 0.0; + depth_output_buffer.r = -vertex.z; + +#if defined(AO_USED) + orm_output_buffer.r = ao; +#else + orm_output_buffer.r = 0.0; +#endif + orm_output_buffer.g = roughness; + orm_output_buffer.b = metallic; + orm_output_buffer.a = sss_strength; + + emission_output_buffer.rgb = emission; + emission_output_buffer.a = 0.0; +#endif + +#ifdef MODE_RENDER_NORMAL + normal_output_buffer = vec4(normal * 0.5 + 0.5, 0.0); +#ifdef MODE_RENDER_ROUGHNESS + roughness_output_buffer = roughness; +#endif //MODE_RENDER_ROUGHNESS +#endif //MODE_RENDER_NORMAL + +//nothing happens, so a tree-ssa optimizer will result in no fragment shader :) +#else + + specular_light *= scene_data.reflection_multiplier; + ambient_light *= albedo; //ambient must be multiplied by albedo at the end + +//ambient occlusion +#if defined(AO_USED) + + if (scene_data.ssao_enabled && scene_data.ssao_ao_affect > 0.0) { + float ssao = texture(sampler2D(ao_buffer, material_samplers[SAMPLER_LINEAR_CLAMP]), screen_uv).r; + ao = mix(ao, min(ao, ssao), scene_data.ssao_ao_affect); + ao_light_affect = mix(ao_light_affect, max(ao_light_affect, scene_data.ssao_light_affect), scene_data.ssao_ao_affect); + } + + ambient_light = mix(scene_data.ao_color.rgb, ambient_light, ao); + ao_light_affect = mix(1.0, ao, ao_light_affect); + specular_light = mix(scene_data.ao_color.rgb, specular_light, ao_light_affect); + diffuse_light = mix(scene_data.ao_color.rgb, diffuse_light, ao_light_affect); + +#else + + if (scene_data.ssao_enabled) { + float ao = texture(sampler2D(ao_buffer, material_samplers[SAMPLER_LINEAR_CLAMP]), screen_uv).r; + ambient_light = mix(scene_data.ao_color.rgb, ambient_light, ao); + float ao_light_affect = mix(1.0, ao, scene_data.ssao_light_affect); + specular_light = mix(scene_data.ao_color.rgb, specular_light, ao_light_affect); + diffuse_light = mix(scene_data.ao_color.rgb, diffuse_light, ao_light_affect); + } + +#endif // AO_USED + + // base color remapping + diffuse_light *= 1.0 - metallic; // TODO: avoid all diffuse and ambient light calculations when metallic == 1 up to this point + ambient_light *= 1.0 - metallic; + + //fog + +#ifdef MODE_MULTIPLE_RENDER_TARGETS + +#ifdef MODE_UNSHADED + diffuse_buffer = vec4(albedo.rgb, 0.0); + specular_buffer = vec4(0.0); + +#else + + diffuse_buffer = vec4(emission + diffuse_light + ambient_light, sss_strength); + specular_buffer = vec4(specular_light, metallic); + +#endif + +#else //MODE_MULTIPLE_RENDER_TARGETS + +#ifdef MODE_UNSHADED + frag_color = vec4(albedo, alpha); +#else + frag_color = vec4(emission + ambient_light + diffuse_light + specular_light, alpha); + //frag_color = vec4(1.0); + +#endif //USE_NO_SHADING + +#endif //MODE_MULTIPLE_RENDER_TARGETS + +#endif //MODE_RENDER_DEPTH +} |