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-rw-r--r--scene/resources/sky_material.cpp446
1 files changed, 268 insertions, 178 deletions
diff --git a/scene/resources/sky_material.cpp b/scene/resources/sky_material.cpp
index 9d79c22159..39082b6f7a 100644
--- a/scene/resources/sky_material.cpp
+++ b/scene/resources/sky_material.cpp
@@ -30,6 +30,11 @@
#include "sky_material.h"
+#include "core/version.h"
+
+Mutex ProceduralSkyMaterial::shader_mutex;
+RID ProceduralSkyMaterial::shader;
+
void ProceduralSkyMaterial::set_sky_top_color(const Color &p_sky_top) {
sky_top_color = p_sky_top;
RS::get_singleton()->material_set_param(_get_material(), "sky_top_color", sky_top_color.to_linear());
@@ -128,7 +133,17 @@ Shader::Mode ProceduralSkyMaterial::get_shader_mode() const {
return Shader::MODE_SKY;
}
+RID ProceduralSkyMaterial::get_rid() const {
+ _update_shader();
+ if (!shader_set) {
+ RS::get_singleton()->material_set_shader(_get_material(), shader);
+ shader_set = true;
+ }
+ return _get_material();
+}
+
RID ProceduralSkyMaterial::get_shader_rid() const {
+ _update_shader();
return shader;
}
@@ -180,72 +195,92 @@ void ProceduralSkyMaterial::_bind_methods() {
ADD_PROPERTY(PropertyInfo(Variant::FLOAT, "sun_curve", PROPERTY_HINT_EXP_EASING), "set_sun_curve", "get_sun_curve");
}
-ProceduralSkyMaterial::ProceduralSkyMaterial() {
- String code = "shader_type sky;\n\n";
-
- code += "uniform vec4 sky_top_color : hint_color = vec4(0.35, 0.46, 0.71, 1.0);\n";
- code += "uniform vec4 sky_horizon_color : hint_color = vec4(0.55, 0.69, 0.81, 1.0);\n";
- code += "uniform float sky_curve : hint_range(0, 1) = 0.09;\n";
- code += "uniform float sky_energy = 1.0;\n\n";
- code += "uniform vec4 ground_bottom_color : hint_color = vec4(0.12, 0.12, 0.13, 1.0);\n";
- code += "uniform vec4 ground_horizon_color : hint_color = vec4(0.37, 0.33, 0.31, 1.0);\n";
- code += "uniform float ground_curve : hint_range(0, 1) = 0.02;\n";
- code += "uniform float ground_energy = 1.0;\n\n";
- code += "uniform float sun_angle_max = 1.74;\n";
- code += "uniform float sun_curve : hint_range(0, 1) = 0.05;\n\n";
- code += "void sky() {\n";
- code += "\tfloat v_angle = acos(clamp(EYEDIR.y, -1.0, 1.0));\n";
- code += "\tfloat c = (1.0 - v_angle / (PI * 0.5));\n";
- code += "\tvec3 sky = mix(sky_horizon_color.rgb, sky_top_color.rgb, clamp(1.0 - pow(1.0 - c, 1.0 / sky_curve), 0.0, 1.0));\n";
- code += "\tsky *= sky_energy;\n";
- code += "\tif (LIGHT0_ENABLED) {\n";
- code += "\t\tfloat sun_angle = acos(dot(LIGHT0_DIRECTION, EYEDIR));\n";
- code += "\t\tif (sun_angle < LIGHT0_SIZE) {\n";
- code += "\t\t\tsky = LIGHT0_COLOR * LIGHT0_ENERGY;\n";
- code += "\t\t} else if (sun_angle < sun_angle_max) {\n";
- code += "\t\t\tfloat c2 = (sun_angle - LIGHT0_SIZE) / (sun_angle_max - LIGHT0_SIZE);\n";
- code += "\t\t\tsky = mix(LIGHT0_COLOR * LIGHT0_ENERGY, sky, clamp(1.0 - pow(1.0 - c2, 1.0 / sun_curve), 0.0, 1.0));\n";
- code += "\t\t}\n";
- code += "\t}\n";
- code += "\tif (LIGHT1_ENABLED) {\n";
- code += "\t\tfloat sun_angle = acos(dot(LIGHT1_DIRECTION, EYEDIR));\n";
- code += "\t\tif (sun_angle < LIGHT1_SIZE) {\n";
- code += "\t\t\tsky = LIGHT1_COLOR * LIGHT1_ENERGY;\n";
- code += "\t\t} else if (sun_angle < sun_angle_max) {\n";
- code += "\t\t\tfloat c2 = (sun_angle - LIGHT1_SIZE) / (sun_angle_max - LIGHT1_SIZE);\n";
- code += "\t\t\tsky = mix(LIGHT1_COLOR * LIGHT1_ENERGY, sky, clamp(1.0 - pow(1.0 - c2, 1.0 / sun_curve), 0.0, 1.0));\n";
- code += "\t\t}\n";
- code += "\t}\n";
- code += "\tif (LIGHT2_ENABLED) {\n";
- code += "\t\tfloat sun_angle = acos(dot(LIGHT2_DIRECTION, EYEDIR));\n";
- code += "\t\tif (sun_angle < LIGHT2_SIZE) {\n";
- code += "\t\t\tsky = LIGHT2_COLOR * LIGHT2_ENERGY;\n";
- code += "\t\t} else if (sun_angle < sun_angle_max) {\n";
- code += "\t\t\tfloat c2 = (sun_angle - LIGHT2_SIZE) / (sun_angle_max - LIGHT2_SIZE);\n";
- code += "\t\t\tsky = mix(LIGHT2_COLOR * LIGHT2_ENERGY, sky, clamp(1.0 - pow(1.0 - c2, 1.0 / sun_curve), 0.0, 1.0));\n";
- code += "\t\t}\n";
- code += "\t}\n";
- code += "\tif (LIGHT3_ENABLED) {\n";
- code += "\t\tfloat sun_angle = acos(dot(LIGHT3_DIRECTION, EYEDIR));\n";
- code += "\t\tif (sun_angle < LIGHT3_SIZE) {\n";
- code += "\t\t\tsky = LIGHT3_COLOR * LIGHT3_ENERGY;\n";
- code += "\t\t} else if (sun_angle < sun_angle_max) {\n";
- code += "\t\t\tfloat c2 = (sun_angle - LIGHT3_SIZE) / (sun_angle_max - LIGHT3_SIZE);\n";
- code += "\t\t\tsky = mix(LIGHT3_COLOR * LIGHT3_ENERGY, sky, clamp(1.0 - pow(1.0 - c2, 1.0 / sun_curve), 0.0, 1.0));\n";
- code += "\t\t}\n";
- code += "\t}\n";
- code += "\tc = (v_angle - (PI * 0.5)) / (PI * 0.5);\n";
- code += "\tvec3 ground = mix(ground_horizon_color.rgb, ground_bottom_color.rgb, clamp(1.0 - pow(1.0 - c, 1.0 / ground_curve), 0.0, 1.0));\n";
- code += "\tground *= ground_energy;\n";
- code += "\tCOLOR = mix(ground, sky, step(0.0, EYEDIR.y));\n";
- code += "}\n";
-
- shader = RS::get_singleton()->shader_create();
-
- RS::get_singleton()->shader_set_code(shader, code);
-
- RS::get_singleton()->material_set_shader(_get_material(), shader);
+void ProceduralSkyMaterial::cleanup_shader() {
+ if (shader.is_valid()) {
+ RS::get_singleton()->free(shader);
+ }
+}
+
+void ProceduralSkyMaterial::_update_shader() {
+ shader_mutex.lock();
+ if (shader.is_null()) {
+ shader = RS::get_singleton()->shader_create();
+
+ // Add a comment to describe the shader origin (useful when converting to ShaderMaterial).
+ RS::get_singleton()->shader_set_code(shader, R"(
+// NOTE: Shader automatically converted from )" VERSION_NAME " " VERSION_FULL_CONFIG R"('s ProceduralSkyMaterial.
+
+shader_type sky;
+
+uniform vec4 sky_top_color : hint_color = vec4(0.35, 0.46, 0.71, 1.0);
+uniform vec4 sky_horizon_color : hint_color = vec4(0.55, 0.69, 0.81, 1.0);
+uniform float sky_curve : hint_range(0, 1) = 0.09;
+uniform float sky_energy = 1.0;
+uniform vec4 ground_bottom_color : hint_color = vec4(0.12, 0.12, 0.13, 1.0);
+uniform vec4 ground_horizon_color : hint_color = vec4(0.37, 0.33, 0.31, 1.0);
+uniform float ground_curve : hint_range(0, 1) = 0.02;
+uniform float ground_energy = 1.0;
+uniform float sun_angle_max = 1.74;
+uniform float sun_curve : hint_range(0, 1) = 0.05;
+
+void sky() {
+ float v_angle = acos(clamp(EYEDIR.y, -1.0, 1.0));
+ float c = (1.0 - v_angle / (PI * 0.5));
+ vec3 sky = mix(sky_horizon_color.rgb, sky_top_color.rgb, clamp(1.0 - pow(1.0 - c, 1.0 / sky_curve), 0.0, 1.0));
+ sky *= sky_energy;
+
+ if (LIGHT0_ENABLED) {
+ float sun_angle = acos(dot(LIGHT0_DIRECTION, EYEDIR));
+ if (sun_angle < LIGHT0_SIZE) {
+ sky = LIGHT0_COLOR * LIGHT0_ENERGY;
+ } else if (sun_angle < sun_angle_max) {
+ float c2 = (sun_angle - LIGHT0_SIZE) / (sun_angle_max - LIGHT0_SIZE);
+ sky = mix(LIGHT0_COLOR * LIGHT0_ENERGY, sky, clamp(1.0 - pow(1.0 - c2, 1.0 / sun_curve), 0.0, 1.0));
+ }
+ }
+
+ if (LIGHT1_ENABLED) {
+ float sun_angle = acos(dot(LIGHT1_DIRECTION, EYEDIR));
+ if (sun_angle < LIGHT1_SIZE) {
+ sky = LIGHT1_COLOR * LIGHT1_ENERGY;
+ } else if (sun_angle < sun_angle_max) {
+ float c2 = (sun_angle - LIGHT1_SIZE) / (sun_angle_max - LIGHT1_SIZE);
+ sky = mix(LIGHT1_COLOR * LIGHT1_ENERGY, sky, clamp(1.0 - pow(1.0 - c2, 1.0 / sun_curve), 0.0, 1.0));
+ }
+ }
+
+ if (LIGHT2_ENABLED) {
+ float sun_angle = acos(dot(LIGHT2_DIRECTION, EYEDIR));
+ if (sun_angle < LIGHT2_SIZE) {
+ sky = LIGHT2_COLOR * LIGHT2_ENERGY;
+ } else if (sun_angle < sun_angle_max) {
+ float c2 = (sun_angle - LIGHT2_SIZE) / (sun_angle_max - LIGHT2_SIZE);
+ sky = mix(LIGHT2_COLOR * LIGHT2_ENERGY, sky, clamp(1.0 - pow(1.0 - c2, 1.0 / sun_curve), 0.0, 1.0));
+ }
+ }
+
+ if (LIGHT3_ENABLED) {
+ float sun_angle = acos(dot(LIGHT3_DIRECTION, EYEDIR));
+ if (sun_angle < LIGHT3_SIZE) {
+ sky = LIGHT3_COLOR * LIGHT3_ENERGY;
+ } else if (sun_angle < sun_angle_max) {
+ float c2 = (sun_angle - LIGHT3_SIZE) / (sun_angle_max - LIGHT3_SIZE);
+ sky = mix(LIGHT3_COLOR * LIGHT3_ENERGY, sky, clamp(1.0 - pow(1.0 - c2, 1.0 / sun_curve), 0.0, 1.0));
+ }
+ }
+
+ c = (v_angle - (PI * 0.5)) / (PI * 0.5);
+ vec3 ground = mix(ground_horizon_color.rgb, ground_bottom_color.rgb, clamp(1.0 - pow(1.0 - c, 1.0 / ground_curve), 0.0, 1.0));
+ ground *= ground_energy;
+
+ COLOR = mix(ground, sky, step(0.0, EYEDIR.y));
+}
+)");
+ }
+ shader_mutex.unlock();
+}
+ProceduralSkyMaterial::ProceduralSkyMaterial() {
set_sky_top_color(Color(0.35, 0.46, 0.71));
set_sky_horizon_color(Color(0.55, 0.69, 0.81));
set_sky_curve(0.09);
@@ -261,7 +296,6 @@ ProceduralSkyMaterial::ProceduralSkyMaterial() {
}
ProceduralSkyMaterial::~ProceduralSkyMaterial() {
- RS::get_singleton()->free(shader);
RS::get_singleton()->material_set_shader(_get_material(), RID());
}
@@ -270,7 +304,8 @@ ProceduralSkyMaterial::~ProceduralSkyMaterial() {
void PanoramaSkyMaterial::set_panorama(const Ref<Texture2D> &p_panorama) {
panorama = p_panorama;
- RS::get_singleton()->material_set_param(_get_material(), "source_panorama", panorama);
+ RID tex_rid = p_panorama.is_valid() ? p_panorama->get_rid() : RID();
+ RS::get_singleton()->material_set_param(_get_material(), "source_panorama", tex_rid);
}
Ref<Texture2D> PanoramaSkyMaterial::get_panorama() const {
@@ -285,7 +320,17 @@ Shader::Mode PanoramaSkyMaterial::get_shader_mode() const {
return Shader::MODE_SKY;
}
+RID PanoramaSkyMaterial::get_rid() const {
+ _update_shader();
+ if (!shader_set) {
+ RS::get_singleton()->material_set_shader(_get_material(), shader);
+ shader_set = true;
+ }
+ return _get_material();
+}
+
RID PanoramaSkyMaterial::get_shader_rid() const {
+ _update_shader();
return shader;
}
@@ -296,23 +341,41 @@ void PanoramaSkyMaterial::_bind_methods() {
ADD_PROPERTY(PropertyInfo(Variant::OBJECT, "panorama", PROPERTY_HINT_RESOURCE_TYPE, "Texture2D"), "set_panorama", "get_panorama");
}
-PanoramaSkyMaterial::PanoramaSkyMaterial() {
- String code = "shader_type sky;\n\n";
+Mutex PanoramaSkyMaterial::shader_mutex;
+RID PanoramaSkyMaterial::shader;
+
+void PanoramaSkyMaterial::cleanup_shader() {
+ if (shader.is_valid()) {
+ RS::get_singleton()->free(shader);
+ }
+}
+
+void PanoramaSkyMaterial::_update_shader() {
+ shader_mutex.lock();
+ if (shader.is_null()) {
+ shader = RS::get_singleton()->shader_create();
- code += "uniform sampler2D source_panorama : filter_linear;\n";
- code += "void sky() {\n";
- code += "\tCOLOR = texture(source_panorama, SKY_COORDS).rgb;\n";
- code += "}";
+ // Add a comment to describe the shader origin (useful when converting to ShaderMaterial).
+ RS::get_singleton()->shader_set_code(shader, R"(
+// NOTE: Shader automatically converted from )" VERSION_NAME " " VERSION_FULL_CONFIG R"('s PanoramaSkyMaterial.
- shader = RS::get_singleton()->shader_create();
+shader_type sky;
- RS::get_singleton()->shader_set_code(shader, code);
+uniform sampler2D source_panorama : filter_linear, hint_albedo;
- RS::get_singleton()->material_set_shader(_get_material(), shader);
+void sky() {
+ COLOR = texture(source_panorama, SKY_COORDS).rgb;
+}
+)");
+ }
+
+ shader_mutex.unlock();
+}
+
+PanoramaSkyMaterial::PanoramaSkyMaterial() {
}
PanoramaSkyMaterial::~PanoramaSkyMaterial() {
- RS::get_singleton()->free(shader);
RS::get_singleton()->material_set_shader(_get_material(), RID());
}
@@ -411,7 +474,8 @@ float PhysicalSkyMaterial::get_dither_strength() const {
void PhysicalSkyMaterial::set_night_sky(const Ref<Texture2D> &p_night_sky) {
night_sky = p_night_sky;
- RS::get_singleton()->material_set_param(_get_material(), "night_sky", night_sky);
+ RID tex_rid = p_night_sky.is_valid() ? p_night_sky->get_rid() : RID();
+ RS::get_singleton()->material_set_param(_get_material(), "night_sky", tex_rid);
}
Ref<Texture2D> PhysicalSkyMaterial::get_night_sky() const {
@@ -426,10 +490,23 @@ Shader::Mode PhysicalSkyMaterial::get_shader_mode() const {
return Shader::MODE_SKY;
}
+RID PhysicalSkyMaterial::get_rid() const {
+ _update_shader();
+ if (!shader_set) {
+ RS::get_singleton()->material_set_shader(_get_material(), shader);
+ shader_set = true;
+ }
+ return _get_material();
+}
+
RID PhysicalSkyMaterial::get_shader_rid() const {
+ _update_shader();
return shader;
}
+Mutex PhysicalSkyMaterial::shader_mutex;
+RID PhysicalSkyMaterial::shader;
+
void PhysicalSkyMaterial::_bind_methods() {
ClassDB::bind_method(D_METHOD("set_rayleigh_coefficient", "rayleigh"), &PhysicalSkyMaterial::set_rayleigh_coefficient);
ClassDB::bind_method(D_METHOD("get_rayleigh_coefficient"), &PhysicalSkyMaterial::get_rayleigh_coefficient);
@@ -481,106 +558,120 @@ void PhysicalSkyMaterial::_bind_methods() {
ADD_PROPERTY(PropertyInfo(Variant::OBJECT, "night_sky", PROPERTY_HINT_RESOURCE_TYPE, "Texture2D"), "set_night_sky", "get_night_sky");
}
-PhysicalSkyMaterial::PhysicalSkyMaterial() {
- String code = "shader_type sky;\n\n";
-
- code += "uniform float rayleigh : hint_range(0, 64) = 2.0;\n";
- code += "uniform vec4 rayleigh_color : hint_color = vec4(0.056, 0.14, 0.3, 1.0);\n";
- code += "uniform float mie : hint_range(0, 1) = 0.005;\n";
- code += "uniform float mie_eccentricity : hint_range(-1, 1) = 0.8;\n";
- code += "uniform vec4 mie_color : hint_color = vec4(0.36, 0.56, 0.82, 1.0);\n\n";
-
- code += "uniform float turbidity : hint_range(0, 1000) = 10.0;\n";
- code += "uniform float sun_disk_scale : hint_range(0, 360) = 1.0;\n";
- code += "uniform vec4 ground_color : hint_color = vec4(1.0);\n";
- code += "uniform float exposure : hint_range(0, 128) = 0.1;\n";
- code += "uniform float dither_strength : hint_range(0, 10) = 1.0;\n\n";
-
- code += "uniform sampler2D night_sky : hint_black;";
-
- code += "const vec3 UP = vec3( 0.0, 1.0, 0.0 );\n\n";
-
- code += "// Sun constants\n";
- code += "const float SUN_ENERGY = 1000.0;\n\n";
-
- code += "// optical length at zenith for molecules\n";
- code += "const float rayleigh_zenith_size = 8.4e3;\n";
- code += "const float mie_zenith_size = 1.25e3;\n\n";
-
- code += "float henyey_greenstein(float cos_theta, float g) {\n";
- code += "\tconst float k = 0.0795774715459;\n";
- code += "\treturn k * (1.0 - g * g) / (pow(1.0 + g * g - 2.0 * g * cos_theta, 1.5));\n";
- code += "}\n\n";
-
- code += "// From: https://www.shadertoy.com/view/4sfGzS credit to iq\n";
- code += "float hash(vec3 p) {\n";
- code += "\tp = fract( p * 0.3183099 + 0.1 );\n";
- code += "\tp *= 17.0;\n";
- code += "\treturn fract(p.x * p.y * p.z * (p.x + p.y + p.z));\n";
- code += "}\n\n";
-
- code += "void sky() {\n";
- code += "\tif (LIGHT0_ENABLED) {\n";
- code += "\t\tfloat zenith_angle = clamp( dot(UP, normalize(LIGHT0_DIRECTION)), -1.0, 1.0 );\n";
- code += "\t\tfloat sun_energy = max(0.0, 1.0 - exp(-((PI * 0.5) - acos(zenith_angle)))) * SUN_ENERGY * LIGHT0_ENERGY;\n";
- code += "\t\tfloat sun_fade = 1.0 - clamp(1.0 - exp(LIGHT0_DIRECTION.y), 0.0, 1.0);\n\n";
-
- code += "\t\t// rayleigh coefficients\n";
- code += "\t\tfloat rayleigh_coefficient = rayleigh - ( 1.0 * ( 1.0 - sun_fade ) );\n";
- code += "\t\tvec3 rayleigh_beta = rayleigh_coefficient * rayleigh_color.rgb * 0.0001;\n";
- code += "\t\t// mie coefficients from Preetham\n";
- code += "\t\tvec3 mie_beta = turbidity * mie * mie_color.rgb * 0.000434;\n\n";
-
- code += "\t\t// optical length\n";
- code += "\t\tfloat zenith = acos(max(0.0, dot(UP, EYEDIR)));\n";
- code += "\t\tfloat optical_mass = 1.0 / (cos(zenith) + 0.15 * pow(93.885 - degrees(zenith), -1.253));\n";
- code += "\t\tfloat rayleigh_scatter = rayleigh_zenith_size * optical_mass;\n";
- code += "\t\tfloat mie_scatter = mie_zenith_size * optical_mass;\n\n";
-
- code += "\t\t// light extinction based on thickness of atmosphere\n";
- code += "\t\tvec3 extinction = exp(-(rayleigh_beta * rayleigh_scatter + mie_beta * mie_scatter));\n\n";
-
- code += "\t\t// in scattering\n";
- code += "\t\tfloat cos_theta = dot(EYEDIR, normalize(LIGHT0_DIRECTION));\n\n";
-
- code += "\t\tfloat rayleigh_phase = (3.0 / (16.0 * PI)) * (1.0 + pow(cos_theta * 0.5 + 0.5, 2.0));\n";
- code += "\t\tvec3 betaRTheta = rayleigh_beta * rayleigh_phase;\n\n";
-
- code += "\t\tfloat mie_phase = henyey_greenstein(cos_theta, mie_eccentricity);\n";
- code += "\t\tvec3 betaMTheta = mie_beta * mie_phase;\n\n";
-
- code += "\t\tvec3 Lin = pow(sun_energy * ((betaRTheta + betaMTheta) / (rayleigh_beta + mie_beta)) * (1.0 - extinction), vec3(1.5));\n";
- code += "\t\t// Hack from https://github.com/mrdoob/three.js/blob/master/examples/jsm/objects/Sky.js\n";
- code += "\t\tLin *= mix(vec3(1.0), pow(sun_energy * ((betaRTheta + betaMTheta) / (rayleigh_beta + mie_beta)) * extinction, vec3(0.5)), clamp(pow(1.0 - zenith_angle, 5.0), 0.0, 1.0));\n\n";
-
- code += "\t\t// Hack in the ground color\n";
- code += "\t\tLin *= mix(ground_color.rgb, vec3(1.0), smoothstep(-0.1, 0.1, dot(UP, EYEDIR)));\n\n";
-
- code += "\t\t// Solar disk and out-scattering\n";
- code += "\t\tfloat sunAngularDiameterCos = cos(LIGHT0_SIZE * sun_disk_scale);\n";
- code += "\t\tfloat sunAngularDiameterCos2 = cos(LIGHT0_SIZE * sun_disk_scale*0.5);\n";
- code += "\t\tfloat sundisk = smoothstep(sunAngularDiameterCos, sunAngularDiameterCos2, cos_theta);\n";
- code += "\t\tvec3 L0 = (sun_energy * 1900.0 * extinction) * sundisk * LIGHT0_COLOR;\n";
- code += "\t\tL0 += texture(night_sky, SKY_COORDS).xyz * extinction;\n\n";
-
- code += "\t\tvec3 color = (Lin + L0) * 0.04;\n";
- code += "\t\tCOLOR = pow(color, vec3(1.0 / (1.2 + (1.2 * sun_fade))));\n";
- code += "\t\tCOLOR *= exposure;\n";
- code += "\t\t// Make optional, eliminates banding\n";
- code += "\t\tCOLOR += (hash(EYEDIR * 1741.9782) * 0.08 - 0.04) * 0.016 * dither_strength;\n";
- code += "\t} else {\n";
- code += "\t\t// There is no sun, so display night_sky and nothing else\n";
- code += "\t\tCOLOR = texture(night_sky, SKY_COORDS).xyz * 0.04;\n";
- code += "\t\tCOLOR *= exposure;\n";
- code += "\t}\n";
- code += "}\n";
-
- shader = RS::get_singleton()->shader_create();
-
- RS::get_singleton()->shader_set_code(shader, code);
-
- RS::get_singleton()->material_set_shader(_get_material(), shader);
+void PhysicalSkyMaterial::cleanup_shader() {
+ if (shader.is_valid()) {
+ RS::get_singleton()->free(shader);
+ }
+}
+
+void PhysicalSkyMaterial::_update_shader() {
+ shader_mutex.lock();
+ if (shader.is_null()) {
+ shader = RS::get_singleton()->shader_create();
+
+ // Add a comment to describe the shader origin (useful when converting to ShaderMaterial).
+ RS::get_singleton()->shader_set_code(shader, R"(
+// NOTE: Shader automatically converted from )" VERSION_NAME " " VERSION_FULL_CONFIG R"('s PhysicalSkyMaterial.
+
+shader_type sky;
+uniform float rayleigh : hint_range(0, 64) = 2.0;
+uniform vec4 rayleigh_color : hint_color = vec4(0.056, 0.14, 0.3, 1.0);
+uniform float mie : hint_range(0, 1) = 0.005;
+uniform float mie_eccentricity : hint_range(-1, 1) = 0.8;
+uniform vec4 mie_color : hint_color = vec4(0.36, 0.56, 0.82, 1.0);
+
+uniform float turbidity : hint_range(0, 1000) = 10.0;
+uniform float sun_disk_scale : hint_range(0, 360) = 1.0;
+uniform vec4 ground_color : hint_color = vec4(1.0);
+uniform float exposure : hint_range(0, 128) = 0.1;
+uniform float dither_strength : hint_range(0, 10) = 1.0;
+
+uniform sampler2D night_sky : hint_black_albedo;
+
+const vec3 UP = vec3( 0.0, 1.0, 0.0 );
+
+// Sun constants
+const float SUN_ENERGY = 1000.0;
+
+// Optical length at zenith for molecules.
+const float rayleigh_zenith_size = 8.4e3;
+const float mie_zenith_size = 1.25e3;
+
+float henyey_greenstein(float cos_theta, float g) {
+ const float k = 0.0795774715459;
+ return k * (1.0 - g * g) / (pow(1.0 + g * g - 2.0 * g * cos_theta, 1.5));
+}
+
+// From: https://www.shadertoy.com/view/4sfGzS credit to iq
+float hash(vec3 p) {
+ p = fract( p * 0.3183099 + 0.1 );
+ p *= 17.0;
+ return fract(p.x * p.y * p.z * (p.x + p.y + p.z));
+}
+
+void sky() {
+ if (LIGHT0_ENABLED) {
+ float zenith_angle = clamp( dot(UP, normalize(LIGHT0_DIRECTION)), -1.0, 1.0 );
+ float sun_energy = max(0.0, 1.0 - exp(-((PI * 0.5) - acos(zenith_angle)))) * SUN_ENERGY * LIGHT0_ENERGY;
+ float sun_fade = 1.0 - clamp(1.0 - exp(LIGHT0_DIRECTION.y), 0.0, 1.0);
+
+ // Rayleigh coefficients.
+ float rayleigh_coefficient = rayleigh - ( 1.0 * ( 1.0 - sun_fade ) );
+ vec3 rayleigh_beta = rayleigh_coefficient * rayleigh_color.rgb * 0.0001;
+ // mie coefficients from Preetham
+ vec3 mie_beta = turbidity * mie * mie_color.rgb * 0.000434;
+
+ // Optical length.
+ float zenith = acos(max(0.0, dot(UP, EYEDIR)));
+ float optical_mass = 1.0 / (cos(zenith) + 0.15 * pow(93.885 - degrees(zenith), -1.253));
+ float rayleigh_scatter = rayleigh_zenith_size * optical_mass;
+ float mie_scatter = mie_zenith_size * optical_mass;
+
+ // Light extinction based on thickness of atmosphere.
+ vec3 extinction = exp(-(rayleigh_beta * rayleigh_scatter + mie_beta * mie_scatter));
+
+ // In scattering.
+ float cos_theta = dot(EYEDIR, normalize(LIGHT0_DIRECTION));
+
+ float rayleigh_phase = (3.0 / (16.0 * PI)) * (1.0 + pow(cos_theta * 0.5 + 0.5, 2.0));
+ vec3 betaRTheta = rayleigh_beta * rayleigh_phase;
+
+ float mie_phase = henyey_greenstein(cos_theta, mie_eccentricity);
+ vec3 betaMTheta = mie_beta * mie_phase;
+
+ vec3 Lin = pow(sun_energy * ((betaRTheta + betaMTheta) / (rayleigh_beta + mie_beta)) * (1.0 - extinction), vec3(1.5));
+ // Hack from https://github.com/mrdoob/three.js/blob/master/examples/jsm/objects/Sky.js
+ Lin *= mix(vec3(1.0), pow(sun_energy * ((betaRTheta + betaMTheta) / (rayleigh_beta + mie_beta)) * extinction, vec3(0.5)), clamp(pow(1.0 - zenith_angle, 5.0), 0.0, 1.0));
+
+ // Hack in the ground color.
+ Lin *= mix(ground_color.rgb, vec3(1.0), smoothstep(-0.1, 0.1, dot(UP, EYEDIR)));
+
+ // Solar disk and out-scattering.
+ float sunAngularDiameterCos = cos(LIGHT0_SIZE * sun_disk_scale);
+ float sunAngularDiameterCos2 = cos(LIGHT0_SIZE * sun_disk_scale*0.5);
+ float sundisk = smoothstep(sunAngularDiameterCos, sunAngularDiameterCos2, cos_theta);
+ vec3 L0 = (sun_energy * 1900.0 * extinction) * sundisk * LIGHT0_COLOR;
+ L0 += texture(night_sky, SKY_COORDS).xyz * extinction;
+
+ vec3 color = (Lin + L0) * 0.04;
+ COLOR = pow(color, vec3(1.0 / (1.2 + (1.2 * sun_fade))));
+ COLOR *= exposure;
+ // Make optional, eliminates banding.
+ COLOR += (hash(EYEDIR * 1741.9782) * 0.08 - 0.04) * 0.016 * dither_strength;
+ } else {
+ // There is no sun, so display night_sky and nothing else.
+ COLOR = texture(night_sky, SKY_COORDS).xyz * 0.04;
+ COLOR *= exposure;
+ }
+}
+)");
+ }
+
+ shader_mutex.unlock();
+}
+
+PhysicalSkyMaterial::PhysicalSkyMaterial() {
set_rayleigh_coefficient(2.0);
set_rayleigh_color(Color(0.056, 0.14, 0.3));
set_mie_coefficient(0.005);
@@ -594,5 +685,4 @@ PhysicalSkyMaterial::PhysicalSkyMaterial() {
}
PhysicalSkyMaterial::~PhysicalSkyMaterial() {
- RS::get_singleton()->free(shader);
}
generated by cgit v1.2.3 (git 2.25.1) at 2025-01-03 14:09:21 +0000