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206 lines
9.2 KiB
GLSL
206 lines
9.2 KiB
GLSL
#version 420 core
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#include <constants.glsl>
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#define LIGHTING_TYPE (LIGHTING_TYPE_TRANSMISSION | LIGHTING_TYPE_REFLECTION)
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#define LIGHTING_REFLECTION_KIND LIGHTING_REFLECTION_KIND_SPECULAR
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#if (FLUID_MODE == FLUID_MODE_CHEAP)
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#define LIGHTING_TRANSPORT_MODE LIGHTING_TRANSPORT_MODE_IMPORTANCE
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#elif (FLUID_MODE == FLUID_MODE_SHINY)
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#define LIGHTING_TRANSPORT_MODE LIGHTING_TRANSPORT_MODE_RADIANCE
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#endif
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#define LIGHTING_DISTRIBUTION_SCHEME LIGHTING_DISTRIBUTION_SCHEME_MICROFACET
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#define LIGHTING_DISTRIBUTION LIGHTING_DISTRIBUTION_BECKMANN
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#define HAS_SHADOW_MAPS
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#include <globals.glsl>
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#include <random.glsl>
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layout(location = 0) in vec3 f_pos;
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layout(location = 1) flat in uint f_pos_norm;
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// in vec3 f_col;
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// in float f_light;
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// in vec3 light_pos[2];
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// struct ShadowLocals {
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// mat4 shadowMatrices;
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// mat4 texture_mat;
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// };
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//
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// layout (std140)
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// uniform u_light_shadows {
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// ShadowLocals shadowMats[/*MAX_LAYER_FACES*/192];
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// };
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layout(std140, set = 2, binding = 0)
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uniform u_locals {
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vec3 model_offs;
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float load_time;
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ivec4 atlas_offs;
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};
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layout(location = 0) out vec4 tgt_color;
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#include <sky.glsl>
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#include <light.glsl>
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#include <lod.glsl>
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void main() {
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#ifdef EXPERIMENTAL_BAREMINIMUM
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tgt_color = vec4(simple_lighting(f_pos.xyz, MU_SCATTER, 1.0), 0.5);
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return;
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#endif
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// tgt_color = vec4(1.0 - MU_WATER, 1.0);
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// return;
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// First 3 normals are negative, next 3 are positive
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vec3 normals[6] = vec3[](vec3(-1,0,0), vec3(1,0,0), vec3(0,-1,0), vec3(0,1,0), vec3(0,0,-1), vec3(0,0,1));
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// TODO: last 3 bits in v_pos_norm should be a number between 0 and 5, rather than 0-2 and a direction.
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uint norm_axis = (f_pos_norm >> 30) & 0x3u;
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// Increase array access by 3 to access positive values
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uint norm_dir = ((f_pos_norm >> 29) & 0x1u) * 3u;
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// Use an array to avoid conditional branching
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vec3 f_norm = normals[norm_axis + norm_dir];
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// vec4 light_pos[2];
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// #if (SHADOW_MODE == SHADOW_MODE_MAP)
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// // for (uint i = 0u; i < light_shadow_count.z; ++i) {
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// // light_pos[i] = /*vec3(*/shadowMats[i].texture_mat * vec4(f_pos, 1.0)/*)*/;
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// // }
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// vec4 sun_pos = /*vec3(*/shadowMats[0].texture_mat * vec4(f_pos, 1.0)/*)*/;
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// #elif (SHADOW_MODE == SHADOW_MODE_CHEAP || SHADOW_MODE == SHADOW_MODE_NONE)
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// vec4 sun_pos = vec4(0.0);
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// #endif
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vec3 cam_to_frag = normalize(f_pos - cam_pos.xyz);
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// vec4 vert_pos4 = view_mat * vec4(f_pos, 1.0);
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// vec3 view_dir = normalize(-vec3(vert_pos4)/* / vert_pos4.w*/);
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vec3 view_dir = -cam_to_frag;
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// vec3 surf_color = /*srgb_to_linear*/(vec3(0.4, 0.7, 2.0));
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/*const */vec3 water_color = (1.0 - MU_WATER) * MU_SCATTER;//srgb_to_linear(vec3(0.2, 0.5, 1.0));
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// /*const */vec3 water_color = srgb_to_linear(vec3(0.0, 0.25, 0.5));
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/* vec3 sun_dir = get_sun_dir(time_of_day.x);
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vec3 moon_dir = get_moon_dir(time_of_day.x); */
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#if (SHADOW_MODE == SHADOW_MODE_CHEAP || SHADOW_MODE == SHADOW_MODE_MAP || FLUID_MODE == FLUID_MODE_SHINY)
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float f_alt = alt_at(f_pos.xy);
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#elif (SHADOW_MODE == SHADOW_MODE_NONE || FLUID_MODE == FLUID_MODE_CHEAP)
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float f_alt = f_pos.z;
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#endif
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#if (SHADOW_MODE == SHADOW_MODE_CHEAP || SHADOW_MODE == SHADOW_MODE_MAP)
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vec4 f_shadow = textureBicubic(t_horizon, s_horizon, pos_to_tex(f_pos.xy));
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float sun_shade_frac = horizon_at2(f_shadow, f_alt, f_pos, sun_dir);
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#elif (SHADOW_MODE == SHADOW_MODE_NONE)
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float sun_shade_frac = 1.0;//horizon_at2(f_shadow, f_alt, f_pos, sun_dir);
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#endif
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float moon_shade_frac = 1.0;//horizon_at2(f_shadow, f_alt, f_pos, moon_dir);
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// float sun_shade_frac = horizon_at(/*f_shadow, f_pos.z, */f_pos, sun_dir);
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// float moon_shade_frac = horizon_at(/*f_shadow, f_pos.z, */f_pos, moon_dir);
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// float shade_frac = /*1.0;*/sun_shade_frac + moon_shade_frac;
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// DirectionalLight sun_info = get_sun_info(sun_dir, sun_shade_frac, light_pos);
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float point_shadow = shadow_at(f_pos, f_norm);
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DirectionalLight sun_info = get_sun_info(sun_dir, point_shadow * sun_shade_frac, /*sun_pos*/f_pos);
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DirectionalLight moon_info = get_moon_info(moon_dir, point_shadow * moon_shade_frac/*, light_pos*/);
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float fluid_alt = f_pos.z;//max(ceil(f_pos.z), floor(f_alt));// f_alt;//max(f_alt - f_pos.z, 0.0);
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const float alpha = 0.255/* / 4.0 / sqrt(2.0)*/;
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const float n2 = 1.3325;
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const float R_s2s0 = pow((1.0 - n2) / (1.0 + n2), 2);
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const float R_s1s0 = pow((1.3325 - n2) / (1.3325 + n2), 2);
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const float R_s2s1 = pow((1.0 - 1.3325) / (1.0 + 1.3325), 2);
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const float R_s1s2 = pow((1.3325 - 1.0) / (1.3325 + 1.0), 2);
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float R_s = (f_pos.z < fluid_alt) ? mix(R_s2s1 * R_s1s0, R_s1s0, medium.x) : mix(R_s2s0, R_s1s2 * R_s2s0, medium.x);
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// Water is transparent so both normals are valid.
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vec3 cam_norm = faceforward(f_norm, f_norm, cam_to_frag);
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vec3 mu = MU_WATER;
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// NOTE: Default intersection point is camera position, meaning if we fail to intersect we assume the whole camera is in water.
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vec3 cam_attenuation = vec3(1.0);//compute_attenuation_point(f_pos, -view_dir, mu, fluid_alt, cam_pos.xyz);
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// NOTE: Assumes normal is vertical.
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vec3 sun_view_dir = cam_pos.z <= fluid_alt ? /*refract(view_dir, -f_norm, 1.0 / n2)*//*reflect(view_dir, -f_norm)*/-view_dir : view_dir;//vec3(view_dir.xy, -view_dir.z) : view_dir;
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vec3 k_a = vec3(1.0);
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vec3 k_d = vec3(1.0);
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vec3 k_s = vec3(R_s);
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vec3 emitted_light, reflected_light;
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// Prevent the sky affecting light when underground
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float not_underground = clamp((f_pos.z - f_alt) / 128.0 + 1.0, 0.0, 1.0);
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// float point_shadow = shadow_at(f_pos, f_norm);
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// vec3 cam_to_frag = normalize(f_pos - cam_pos.xyz);
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// vec3 emitted_light, reflected_light;
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// vec3 light, diffuse_light, ambient_light;
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// Squared to account for prior saturation.
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// float f_light = 1.0;// pow(f_light, 1.5);
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// float vert_light = f_light;
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// vec3 light_frac = /*vec3(1.0);*/light_reflection_factor(f_norm/*vec3(0, 0, 1.0)*/, view_dir, vec3(0, 0, -1.0), vec3(1.0), vec3(R_s), alpha);
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// vec3 surf_color = /*srgb_to_linear*/(vec3(0.4, 0.7, 2.0));
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float max_light = 0.0;
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max_light += get_sun_diffuse2(sun_info, moon_info, f_norm, /*time_of_day.x*//*-cam_to_frag*/sun_view_dir/*view_dir*/, f_pos, mu, cam_attenuation, fluid_alt, k_a/* * (shade_frac * 0.5 + light_frac * 0.5)*/, /*vec3(0.0)*/k_d, k_s, alpha, f_norm, 1.0, emitted_light, reflected_light);
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emitted_light *= not_underground;
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reflected_light *= not_underground;
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// Global illumination when underground (silly)
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emitted_light += (1.0 - not_underground) * 0.05;
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// reflected_light *= f_light * point_shadow * shade_frac;
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// emitted_light *= f_light * point_shadow * max(shade_frac, MIN_SHADOW);
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// max_light *= f_light * point_shadow * shade_frac;
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// reflected_light *= f_light * point_shadow;
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// emitted_light *= f_light * point_shadow;
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// max_light *= f_light * point_shadow;
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// get_sun_diffuse(f_norm, time_of_day.x, light, diffuse_light, ambient_light, 0.0);
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// diffuse_light *= f_light * point_shadow;
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// ambient_light *= f_light, point_shadow;
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// vec3 point_light = light_at(f_pos, f_norm);
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// light += point_light;
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// diffuse_light += point_light;
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// reflected_light += point_light;
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// vec3 surf_color = srgb_to_linear(vec3(0.4, 0.7, 2.0)) * light * diffuse_light * ambient_light;
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// lights_at(f_pos, f_norm, cam_to_frag, k_a * f_light * point_shadow, k_d * f_light * point_shadow, k_s * f_light * point_shadow, alpha, emitted_light, reflected_light);
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/*vec3 point_light = light_at(f_pos, f_norm);
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emitted_light += point_light;
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reflected_light += point_light; */
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max_light += lights_at(f_pos, /*f_norm*/cam_norm, view_dir, mu, cam_attenuation, fluid_alt, k_a, k_d, k_s, alpha, f_norm, 1.0, emitted_light, reflected_light);
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// vec3 diffuse_light_point = vec3(0.0);
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// max_light += lights_at(f_pos, f_norm, view_dir, k_a, vec3(1.0), k_s, alpha, emitted_light, diffuse_light_point);
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// float reflected_light_point = length(reflected_light);///*length*/(diffuse_light_point.r) + f_light * point_shadow;
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// float reflected_light_point = dot(reflected_light, reflected_light) * 0.5;///*length*/(diffuse_light_point.r) + f_light * point_shadow;
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// vec3 dump_light = vec3(0.0);
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// vec3 specular_light_point = vec3(0.0);
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// lights_at(f_pos, f_norm, view_dir, vec3(0.0), vec3(0.0), /*vec3(1.0)*/k_s, alpha, dump_light, specular_light_point);
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// diffuse_light_point -= specular_light_point;
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// float reflected_light_point = /*length*/(diffuse_light_point.r) + f_light * point_shadow;
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// reflected_light += k_d * (diffuse_light_point + f_light * point_shadow * shade_frac) + specular_light_point;
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float passthrough = max(dot(f_norm, -cam_to_frag), 0) * 0.75;
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float min_refl = 0.0;
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if (medium.x != MEDIUM_WATER) {
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min_refl = min(emitted_light.r, min(emitted_light.g, emitted_light.b));
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}
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vec3 surf_color = illuminate(max_light, view_dir, water_color * /* fog_color * */emitted_light, /*surf_color * */water_color * reflected_light);
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// vec4 color = vec4(surf_color, passthrough * 1.0 / (1.0 + min_refl));// * (1.0 - /*log(1.0 + cam_attenuation)*//*cam_attenuation*/1.0 / (2.0 - log_cam)));
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vec4 color = vec4(surf_color, (1.0 - passthrough) * 1.0 / (1.0 + min_refl));
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tgt_color = color;
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}
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