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307 lines
15 KiB
GLSL
307 lines
15 KiB
GLSL
#version 330 core
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// #extension GL_ARB_texture_storage : require
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#include <constants.glsl>
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#define LIGHTING_TYPE LIGHTING_TYPE_REFLECTION
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#define LIGHTING_REFLECTION_KIND LIGHTING_REFLECTION_KIND_GLOSSY
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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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in vec3 f_pos;
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// in float f_ao;
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// in vec3 f_chunk_pos;
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// #ifdef FLUID_MODE_SHINY
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flat in uint f_pos_norm;
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// #else
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// const uint f_pos_norm = 0u;
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// #endif
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// in float f_alt;
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// in vec4 f_shadow;
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// in vec3 f_col;
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// in float f_light;
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/*centroid */in vec2 f_uv_pos;
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// in vec3 light_pos[2];
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// const vec3 light_pos[6] = vec3[](vec3(0), vec3(0), vec3(00), vec3(0), vec3(0), vec3(0));
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/* #if (SHADOW_MODE == SHADOW_MODE_MAP)
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in vec4 sun_pos;
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#elif (SHADOW_MODE == SHADOW_MODE_CHEAP || SHADOW_MODE == SHADOW_MODE_NONE)
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const vec4 sun_pos = vec4(0.0);
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#endif */
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uniform sampler2D t_col_light;
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layout (std140)
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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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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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// discard;
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// vec4 f_col_light = textureGrad(t_col_light, f_uv_pos / texSize, 0.25, 0.25);
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// vec4 f_col_light = texture(t_col_light, (f_uv_pos) / texSize);
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// First 3 normals are negative, next 3 are positive
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const vec3 normals[8] = 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), vec3(0,0,0), vec3(0,0,0));
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// uint norm_index = (f_pos_norm >> 29) & 0x7u;
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// vec2 uv_delta = (norm_index & 0u) == 0u ? vec2(-1.0) : vec2(0);
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vec2 f_uv_pos = f_uv_pos + atlas_offs.xy;
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// vec4 f_col_light = textureProj(t_col_light, vec3(f_uv_pos + 0.5, textureSize(t_col_light, 0)));//(f_uv_pos/* + 0.5*/) / texSize);
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// float f_light = textureProj(t_col_light, vec3(f_uv_pos + 0.5, textureSize(t_col_light, 0))).a;//1.0;//f_col_light.a * 4.0;// f_light = float(v_col_light & 0x3Fu) / 64.0;
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vec4 f_col_light = texelFetch(t_col_light, ivec2(f_uv_pos)/* + uv_delta*//* - f_norm * 0.00001*/, 0);
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// float f_light = f_col_light.a;
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// vec4 f_col_light = texelFetch(t_col_light, ivec2(int(f_uv_pos.x), int(f_uv_pos.y)/* + uv_delta*//* - f_norm * 0.00001*/), 0);
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vec3 f_col = /*linear_to_srgb*//*srgb_to_linear*/(f_col_light.rgb);
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// vec3 f_col = vec3(1.0);
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float f_light = texture(t_col_light, (f_uv_pos + 0.5) / textureSize(t_col_light, 0)).a;//1.0;//f_col_light.a * 4.0;// f_light = float(v_col_light & 0x3Fu) / 64.0;
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// vec2 texSize = textureSize(t_col_light, 0);
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// float f_light = texture(t_col_light, f_uv_pos/* + vec2(atlas_offs.xy)*/).a;//1.0;//f_col_light.a * 4.0;// f_light = float(v_col_light & 0x3Fu) / 64.0;
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// float f_light = textureProj(t_col_light, vec3(f_uv_pos/* + vec2(atlas_offs.xy)*/, texSize.x)).a;//1.0;//f_col_light.a * 4.0;// f_light = float(v_col_light & 0x3Fu) / 64.0;
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// float f_light = textureProjLod(t_col_light, vec3(f_uv_pos/* + vec2(atlas_offs.xy)*/, texSize.x), 0).a;//1.0;//f_col_light.a * 4.0;// f_light = float(v_col_light & 0x3Fu) / 64.0;
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// float f_light = textureGrad(t_col_light, (f_uv_pos + 0.5) / texSize, vec2(0.1, 0.0), vec2(0.0, 0.1)).a;//1.0;//f_col_light.a * 4.0;// f_light = float(v_col_light & 0x3Fu) / 64.0;
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// f_light = sqrt(f_light);
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// f_light = sqrt(f_light);
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// f_col = vec3((uvec3(v_col_light) >> uvec3(8, 16, 24)) & uvec3(0xFFu)) / 255.0;
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// vec3 f_col = light_col.rgb;//vec4(1.0, 0.0, 0.0, 1.0);
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// float f_ao = 1.0;
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// vec3 my_chunk_pos = vec3(ivec3((uvec3(f_pos_norm) >> uvec3(0, 6, 12)) & uvec3(0x3Fu, 0x3Fu, 0xFFFFu)));
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// tgt_color = vec4(hash(floor(vec4(my_chunk_pos.x, 0, 0, 0))), hash(floor(vec4(0, my_chunk_pos.y, 0, 1))), hash(floor(vec4(0, 0, my_chunk_pos.z, 2))), 1.0);
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// tgt_color.rgb *= f_light;
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// tgt_color = vec4(vec3(f_light), 1.0);
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// tgt_color = vec4(f_col, 1.0);
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// return;
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// vec4 light_pos[2];
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// vec4 light_col = vec4(
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// hash(floor(vec4(f_pos.x, 0, 0, 0))),
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// hash(floor(vec4(0, f_pos.y, 0, 1))),
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// hash(floor(vec4(0, 0, f_pos.z, 2))),
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// 1.0
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// );
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// vec3 f_col = light_col.rgb;//vec4(1.0, 0.0, 0.0, 1.0);
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// tgt_color = vec4(f_col, 1.0);
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// tgt_color = vec4(light_shadow_count.x <= 31u ? f_col : vec3(0.0), 1.0);
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// tgt_color = vec4(0.0, 0.0, 0.0, 1.0);
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// float sum = 0.0;
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// for (uint i = 0u; i < /* 6 * */light_shadow_count.x; i ++) {
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// // uint i = 1u;
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// Light L = lights[i/* / 6*/];
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// /* vec4 light_col = vec4(
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// hash(vec4(1.0, 0.0, 0.0, i)),
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// hash(vec4(1.0, 1.0, 0.0, i)),
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// hash(vec4(1.0, 0.0, 1.0, i)),
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// 1.0
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// ); */
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// vec3 light_col = vec3(1.0);//L.light_col.rgb;
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// float light_strength = L.light_col.a / 255.0;
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// // float light_strength = 1.0 / light_shadow_count.x;
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// vec3 light_pos = L.light_pos.xyz;
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// // Pre-calculate difference between light and fragment
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// vec3 fragToLight = f_pos - light_pos;
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// // vec3 f_norm = normals[(f_pos_norm >> 29) & 0x7u];
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// // use the light to fragment vector to sample from the depth map
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// float bias = 0.0;//0.05;//0.05;
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// // float closestDepth = texture(t_shadow_maps, vec4(fragToLight, i)/*, 0.0*//*, bias*/).r;
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// // float closestDepth = texture(t_shadow_maps, vec4(fragToLight, lightIndex), bias);
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// // float closestDepth = texture(t_shadow_maps, vec4(fragToLight, i + 1)/*, bias*/).r;
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// float currentDepth = VectorToDepth(fragToLight) + bias;
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// float closestDepth = texture(t_shadow_maps, vec3(fragToLight)/*, -2.5*/).r;
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//
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// // float visibility = texture(t_shadow_maps, vec4(fragToLight, i + 1), -(length(fragToLight) - bias)/* / screen_res.w*/);
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// // it is currently in linear range between [0,1]. Re-transform back to original value
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// // closestDepth *= screen_res.w; // far plane
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// // now test for shadows
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// // float shadow = /*currentDepth*/(screen_res.w - bias) > closestDepth ? 1.0 : 0.0;
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// // float shadow = currentDepth - bias > closestDepth ? 1.0 : 0.0;
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// // tgt_color += light_col * vec4(vec3(/*closestDepth*/visibility/* + bias*//* / screen_res.w */) * 1.0 / light_shadow_count.x, 0.0);
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// // tgt_color.rgb += light_col * vec3(closestDepth + 0.05 / screen_res.w) * 1.0 /*/ light_shadow_count.x*/ * light_strength;
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// tgt_color.rgb += light_col * vec3(closestDepth) * 1.0 / screen_res.w /*/ light_shadow_count.x*/ * light_strength;
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// sum += light_strength;
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// }
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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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// uint norm_index = (f_pos_norm >> 29) & 0x7u;
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// vec3 f_norm = normals[norm_index];
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vec3 f_norm = normals[(f_pos_norm >> 29) & 0x7u];
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// vec3 du = dFdx(f_pos);
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// vec3 dv = dFdy(f_pos);
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// vec3 f_norm = normalize(cross(du, dv));
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// /* if (light_shadow_count.x == 1) {
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// tgt_color.rgb = vec3(0.0);
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// } */
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// if (sum > 0.0) {
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// tgt_color.rgb /= sum;
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// }
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// return;
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// Whether this face is facing fluid or not.
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bool faces_fluid = bool((f_pos_norm >> 28) & 0x1u);
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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 view_dir = normalize(f_pos - cam_pos.xyz);
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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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float alpha = 1.0;//0.0001;//1.0;
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// TODO: Possibly angle with water surface into account? Since we can basically assume it's horizontal.
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const float n2 = 1.5;//1.01;
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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 faces_fluid = faces_fluid && f_pos.z <= floor(f_alt);
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float fluid_alt = max(f_pos.z + 1, floor(f_alt));
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float R_s = /*(f_pos.z < f_alt)*/faces_fluid /*&& 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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// vec3 surf_color = /*srgb_to_linear*/(f_col);
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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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// float sun_light = get_sun_brightness(sun_dir);
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// float moon_light = get_moon_brightness(moon_dir);
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/* float sun_shade_frac = horizon_at(f_pos, sun_dir);
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float moon_shade_frac = horizon_at(f_pos, moon_dir); */
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// float f_alt = alt_at(f_pos.xy);
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// vec4 f_shadow = textureBicubic(t_horizon, pos_to_tex(f_pos.xy));
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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, 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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// Globbal illumination "estimate" used to light the faces of voxels which are parallel to the sun or moon (which is a very common occurrence).
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// Will be attenuated by k_d, which is assumed to carry any additional ambient occlusion information (e.g. about shadowing).
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// float ambient_sides = clamp(mix(0.5, 0.0, abs(dot(-f_norm, sun_dir)) * 10000.0), 0.0, 0.5);
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// NOTE: current assumption is that moon and sun shouldn't be out at the sae time.
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// This assumption is (or can at least easily be) wrong, but if we pretend it's true we avoids having to explicitly pass in a separate shadow
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// for the sun and moon (since they have different brightnesses / colors so the shadows shouldn't attenuate equally).
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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 max_light = 0.0;
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// After shadows are computed, we use a refracted sun and moon direction.
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// sun_dir = faces_fluid && sun_shade_frac > 0.0 ? refract(sun_dir/*-view_dir*/, vec3(0.0, 0.0, 1.0), 1.0 / 1.3325) : sun_dir;
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// moon_dir = faces_fluid && moon_shade_frac > 0.0 ? refract(moon_dir/*-view_dir*/, vec3(0.0, 0.0, 1.0), 1.0 / 1.3325) : moon_dir;
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// Compute attenuation due to water from the camera.
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vec3 mu = faces_fluid/* && f_pos.z <= fluid_alt*/ ? MU_WATER : vec3(0.0);
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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 =
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medium.x == 1u ? compute_attenuation_point(cam_pos.xyz, view_dir, MU_WATER, fluid_alt, /*cam_pos.z <= fluid_alt ? cam_pos.xyz : f_pos*/f_pos)
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: compute_attenuation_point(f_pos, -view_dir, mu, fluid_alt, /*cam_pos.z <= fluid_alt ? cam_pos.xyz : f_pos*/cam_pos.xyz);
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// Computing light attenuation from water.
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vec3 emitted_light, reflected_light;
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// To account for prior saturation
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/*float */f_light = faces_fluid ? 1.0 : pow(f_light, 1.5);
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emitted_light = vec3(1.0);
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reflected_light = vec3(1.0);
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max_light += get_sun_diffuse2(/*time_of_day.x, */sun_info, moon_info, f_norm, view_dir, f_pos, mu, cam_attenuation, fluid_alt, k_a/* * (shade_frac * 0.5 + light_frac * 0.5)*/, k_d, k_s, alpha, f_norm, 1.0, emitted_light, reflected_light);
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// emitted_light *= f_light * point_shadow * max(shade_frac, MIN_SHADOW);
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// reflected_light *= f_light * point_shadow * shade_frac;
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// max_light *= f_light * point_shadow * shade_frac;
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emitted_light *= f_light;
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reflected_light *= f_light;
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max_light *= f_light;
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max_light += lights_at(f_pos, f_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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// float f_ao = 1.0;
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// float ao = /*pow(f_ao, 0.5)*/f_ao * 0.9 + 0.1;
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// emitted_light *= ao;
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// reflected_light *= ao;
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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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// float point_shadow = shadow_at(f_pos, f_norm);
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// vec3 point_light = light_at(f_pos, f_norm);
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// vec3 light, diffuse_light, ambient_light;
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// get_sun_diffuse(f_norm, time_of_day.x, cam_to_frag, k_a * f_light, k_d * f_light, k_s * f_light, alpha, emitted_light, reflected_light);
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// get_sun_diffuse(f_norm, time_of_day.x, light, diffuse_light, ambient_light, 1.0);
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// float point_shadow = shadow_at(f_pos, f_norm);
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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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// reflected_light += light_reflection_factor(norm, cam_to_frag, , vec3 k_d, vec3 k_s, float alpha) {
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// light_reflection_factorplight_reflection_factor
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// vec3 surf_color = illuminate(srgb_to_linear(f_col), light, diffuse_light, ambient_light);
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vec3 f_chunk_pos = f_pos - (model_offs - focus_off.xyz);
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vec3 col = /*srgb_to_linear*/(f_col + hash(vec4(floor(f_chunk_pos * 3.0 - f_norm * 0.5), 0)) * 0.01/* - 0.01*/); // Small-scale noise
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// vec3 col = /*srgb_to_linear*/(f_col + hash(vec4(floor(f_pos * 3.0 - f_norm * 0.5), 0)) * 0.01); // Small-scale noise
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vec3 surf_color = illuminate(max_light, view_dir, col * emitted_light, col * reflected_light);
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#if (CLOUD_MODE == CLOUD_MODE_REGULAR)
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float fog_level = fog(f_pos.xyz, focus_pos.xyz, medium.x);
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vec4 clouds;
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vec3 fog_color = get_sky_color(cam_to_frag/*view_dir*/, time_of_day.x, cam_pos.xyz, f_pos, 1.0, false, clouds);
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vec3 color = mix(mix(surf_color, fog_color, fog_level), clouds.rgb, clouds.a);
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#elif (CLOUD_MODE == CLOUD_MODE_NONE)
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vec3 color = surf_color;
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#endif
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tgt_color = vec4(color, 1.0);
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}
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