diff options
Diffstat (limited to 'servers/rendering/renderer_rd/shaders/sky.glsl')
| -rw-r--r-- | servers/rendering/renderer_rd/shaders/sky.glsl | 250 |
1 files changed, 250 insertions, 0 deletions
diff --git a/servers/rendering/renderer_rd/shaders/sky.glsl b/servers/rendering/renderer_rd/shaders/sky.glsl new file mode 100644 index 0000000000..6c985e1f5c --- /dev/null +++ b/servers/rendering/renderer_rd/shaders/sky.glsl @@ -0,0 +1,250 @@ +#[vertex] + +#version 450 + +VERSION_DEFINES + +layout(location = 0) out vec2 uv_interp; + +layout(push_constant, binding = 1, std430) uniform Params { + mat3 orientation; + vec4 proj; + vec4 position_multiplier; + float time; +} +params; + +void main() { + vec2 base_arr[4] = vec2[](vec2(-1.0, -1.0), vec2(-1.0, 1.0), vec2(1.0, 1.0), vec2(1.0, -1.0)); + uv_interp = base_arr[gl_VertexIndex]; + gl_Position = vec4(uv_interp, 1.0, 1.0); +} + +#[fragment] + +#version 450 + +VERSION_DEFINES + +#define M_PI 3.14159265359 + +layout(location = 0) in vec2 uv_interp; + +layout(push_constant, binding = 1, std430) uniform Params { + mat3 orientation; + vec4 proj; + vec4 position_multiplier; + float time; //TODO consider adding vec2 screen res, and float radiance size +} +params; + +#define SAMPLER_NEAREST_CLAMP 0 +#define SAMPLER_LINEAR_CLAMP 1 +#define SAMPLER_NEAREST_WITH_MIPMAPS_CLAMP 2 +#define SAMPLER_LINEAR_WITH_MIPMAPS_CLAMP 3 +#define SAMPLER_NEAREST_WITH_MIPMAPS_ANISOTROPIC_CLAMP 4 +#define SAMPLER_LINEAR_WITH_MIPMAPS_ANISOTROPIC_CLAMP 5 +#define SAMPLER_NEAREST_REPEAT 6 +#define SAMPLER_LINEAR_REPEAT 7 +#define SAMPLER_NEAREST_WITH_MIPMAPS_REPEAT 8 +#define SAMPLER_LINEAR_WITH_MIPMAPS_REPEAT 9 +#define SAMPLER_NEAREST_WITH_MIPMAPS_ANISOTROPIC_REPEAT 10 +#define SAMPLER_LINEAR_WITH_MIPMAPS_ANISOTROPIC_REPEAT 11 + +layout(set = 0, binding = 0) uniform sampler material_samplers[12]; + +layout(set = 0, binding = 1, std430) restrict readonly buffer GlobalVariableData { + vec4 data[]; +} +global_variables; + +layout(set = 0, binding = 2, std140) uniform SceneData { + bool volumetric_fog_enabled; + float volumetric_fog_inv_length; + float volumetric_fog_detail_spread; + + float fog_aerial_perspective; + + vec3 fog_light_color; + float fog_sun_scatter; + + bool fog_enabled; + float fog_density; + + float z_far; + uint directional_light_count; +} +scene_data; + +struct DirectionalLightData { + vec4 direction_energy; + vec4 color_size; + bool enabled; +}; + +layout(set = 0, binding = 3, std140) uniform DirectionalLights { + DirectionalLightData data[MAX_DIRECTIONAL_LIGHT_DATA_STRUCTS]; +} + +directional_lights; + +#ifdef USE_MATERIAL_UNIFORMS +layout(set = 1, binding = 0, std140) uniform MaterialUniforms{ + /* clang-format off */ + +MATERIAL_UNIFORMS + + /* clang-format on */ +} material; +#endif + +layout(set = 2, binding = 0) uniform textureCube radiance; +#ifdef USE_CUBEMAP_PASS +layout(set = 2, binding = 1) uniform textureCube half_res; +layout(set = 2, binding = 2) uniform textureCube quarter_res; +#else +layout(set = 2, binding = 1) uniform texture2D half_res; +layout(set = 2, binding = 2) uniform texture2D quarter_res; +#endif + +layout(set = 3, binding = 0) uniform texture3D volumetric_fog_texture; + +#ifdef USE_CUBEMAP_PASS +#define AT_CUBEMAP_PASS true +#else +#define AT_CUBEMAP_PASS false +#endif + +#ifdef USE_HALF_RES_PASS +#define AT_HALF_RES_PASS true +#else +#define AT_HALF_RES_PASS false +#endif + +#ifdef USE_QUARTER_RES_PASS +#define AT_QUARTER_RES_PASS true +#else +#define AT_QUARTER_RES_PASS false +#endif + +/* clang-format off */ + +FRAGMENT_SHADER_GLOBALS + +/* clang-format on */ + +layout(location = 0) out vec4 frag_color; + +vec4 volumetric_fog_process(vec2 screen_uv) { + vec3 fog_pos = vec3(screen_uv, 1.0); + + return texture(sampler3D(volumetric_fog_texture, material_samplers[SAMPLER_LINEAR_CLAMP]), fog_pos); +} + +vec4 fog_process(vec3 view, vec3 sky_color) { + vec3 fog_color = mix(scene_data.fog_light_color, sky_color, scene_data.fog_aerial_perspective); + + if (scene_data.fog_sun_scatter > 0.001) { + vec4 sun_scatter = vec4(0.0); + float sun_total = 0.0; + for (uint i = 0; i < scene_data.directional_light_count; i++) { + vec3 light_color = directional_lights.data[i].color_size.xyz * directional_lights.data[i].direction_energy.w; + float light_amount = pow(max(dot(view, directional_lights.data[i].direction_energy.xyz), 0.0), 8.0); + fog_color += light_color * light_amount * scene_data.fog_sun_scatter; + } + } + + float fog_amount = clamp(1.0 - exp(-scene_data.z_far * scene_data.fog_density), 0.0, 1.0); + + return vec4(fog_color, fog_amount); +} + +void main() { + vec3 cube_normal; + cube_normal.z = -1.0; + cube_normal.x = (cube_normal.z * (-uv_interp.x - params.proj.x)) / params.proj.y; + cube_normal.y = -(cube_normal.z * (-uv_interp.y - params.proj.z)) / params.proj.w; + cube_normal = mat3(params.orientation) * cube_normal; + cube_normal.z = -cube_normal.z; + cube_normal = normalize(cube_normal); + + vec2 uv = uv_interp * 0.5 + 0.5; + + vec2 panorama_coords = vec2(atan(cube_normal.x, cube_normal.z), acos(cube_normal.y)); + + if (panorama_coords.x < 0.0) { + panorama_coords.x += M_PI * 2.0; + } + + panorama_coords /= vec2(M_PI * 2.0, M_PI); + + vec3 color = vec3(0.0, 0.0, 0.0); + float alpha = 1.0; // Only available to subpasses + vec4 half_res_color = vec4(1.0); + vec4 quarter_res_color = vec4(1.0); + vec4 custom_fog = vec4(0.0); + +#ifdef USE_CUBEMAP_PASS + vec3 inverted_cube_normal = cube_normal; + inverted_cube_normal.z *= -1.0; +#ifdef USES_HALF_RES_COLOR + half_res_color = texture(samplerCube(half_res, material_samplers[SAMPLER_LINEAR_WITH_MIPMAPS_CLAMP]), inverted_cube_normal); +#endif +#ifdef USES_QUARTER_RES_COLOR + quarter_res_color = texture(samplerCube(quarter_res, material_samplers[SAMPLER_LINEAR_WITH_MIPMAPS_CLAMP]), inverted_cube_normal); +#endif +#else +#ifdef USES_HALF_RES_COLOR + half_res_color = textureLod(sampler2D(half_res, material_samplers[SAMPLER_LINEAR_CLAMP]), uv, 0.0); +#endif +#ifdef USES_QUARTER_RES_COLOR + quarter_res_color = textureLod(sampler2D(quarter_res, material_samplers[SAMPLER_LINEAR_CLAMP]), uv, 0.0); +#endif +#endif + +// unused, just here to make our compiler happy, make sure we don't execute any light code the user adds in.. +#ifndef REALLYINCLUDETHIS + { + /* clang-format off */ + +LIGHT_SHADER_CODE + + /* clang-format on */ + } +#endif + { + /* clang-format off */ + +FRAGMENT_SHADER_CODE + + /* clang-format on */ + } + + frag_color.rgb = color * params.position_multiplier.w; + frag_color.a = alpha; + +#if !defined(DISABLE_FOG) && !defined(USE_CUBEMAP_PASS) + + // Draw "fixed" fog before volumetric fog to ensure volumetric fog can appear in front of the sky. + if (scene_data.fog_enabled) { + vec4 fog = fog_process(cube_normal, frag_color.rgb); + frag_color.rgb = mix(frag_color.rgb, fog.rgb, fog.a); + } + + if (scene_data.volumetric_fog_enabled) { + vec4 fog = volumetric_fog_process(uv); + frag_color.rgb = mix(frag_color.rgb, fog.rgb, fog.a); + } + + if (custom_fog.a > 0.0) { + frag_color.rgb = mix(frag_color.rgb, custom_fog.rgb, custom_fog.a); + } + +#endif // DISABLE_FOG + + // Blending is disabled for Sky, so alpha doesn't blend + // alpha is used for subsurface scattering so make sure it doesn't get applied to Sky + if (!AT_CUBEMAP_PASS && !AT_HALF_RES_PASS && !AT_QUARTER_RES_PASS) { + frag_color.a = 0.0; + } +} |