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Add sky cover texture for ProceduralSkyMaterial

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This brings PhysicalSkyMaterial's Night Sky functionality to
ProceduralSkyMaterial, but in a more powerful and general fashion.

This can be used to display stars at night, or clouds at day and night.
For clouds, it won't be physically accurate, but it can look good still.

The Sky Cover Modulate property can be used to adjust the sky cover's
colors and opacity in real-time, which is useful for day/night or weather
transitions.
This commit is contained in:
Hugo Locurcio 2022-02-12 18:38:05 +01:00
parent d3a6b6daaa
commit 56b604bef7
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GPG key ID: 39E8F8BE30B0A49C
3 changed files with 47 additions and 0 deletions
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33
scene/resources/sky_material.cpp
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@ -71,6 +71,25 @@ float ProceduralSkyMaterial::get_sky_energy() const {
return sky_energy;
}
void ProceduralSkyMaterial::set_sky_cover(const Ref<Texture2D> &p_sky_cover) {
sky_cover = p_sky_cover;
RID tex_rid = p_sky_cover.is_valid() ? p_sky_cover->get_rid() : RID();
RS::get_singleton()->material_set_param(_get_material(), "sky_cover", tex_rid);
}
Ref<Texture2D> ProceduralSkyMaterial::get_sky_cover() const {
return sky_cover;
}
void ProceduralSkyMaterial::set_sky_cover_modulate(const Color &p_sky_cover_modulate) {
sky_cover_modulate = p_sky_cover_modulate;
RS::get_singleton()->material_set_param(_get_material(), "sky_cover_modulate", sky_cover_modulate);
}
Color ProceduralSkyMaterial::get_sky_cover_modulate() const {
return sky_cover_modulate;
}
void ProceduralSkyMaterial::set_ground_bottom_color(const Color &p_ground_bottom) {
ground_bottom_color = p_ground_bottom;
RS::get_singleton()->material_set_param(_get_material(), "ground_bottom_color", ground_bottom_color);
@ -156,6 +175,12 @@ void ProceduralSkyMaterial::_bind_methods() {
ClassDB::bind_method(D_METHOD("set_sky_energy", "energy"), &ProceduralSkyMaterial::set_sky_energy);
ClassDB::bind_method(D_METHOD("get_sky_energy"), &ProceduralSkyMaterial::get_sky_energy);
ClassDB::bind_method(D_METHOD("set_sky_cover", "sky_cover"), &ProceduralSkyMaterial::set_sky_cover);
ClassDB::bind_method(D_METHOD("get_sky_cover"), &ProceduralSkyMaterial::get_sky_cover);
ClassDB::bind_method(D_METHOD("set_sky_cover_modulate", "color"), &ProceduralSkyMaterial::set_sky_cover_modulate);
ClassDB::bind_method(D_METHOD("get_sky_cover_modulate"), &ProceduralSkyMaterial::get_sky_cover_modulate);
ClassDB::bind_method(D_METHOD("set_ground_bottom_color", "color"), &ProceduralSkyMaterial::set_ground_bottom_color);
ClassDB::bind_method(D_METHOD("get_ground_bottom_color"), &ProceduralSkyMaterial::get_ground_bottom_color);
@ -179,6 +204,8 @@ void ProceduralSkyMaterial::_bind_methods() {
ADD_PROPERTY(PropertyInfo(Variant::COLOR, "sky_horizon_color", PROPERTY_HINT_COLOR_NO_ALPHA), "set_sky_horizon_color", "get_sky_horizon_color");
ADD_PROPERTY(PropertyInfo(Variant::FLOAT, "sky_curve", PROPERTY_HINT_EXP_EASING), "set_sky_curve", "get_sky_curve");
ADD_PROPERTY(PropertyInfo(Variant::FLOAT, "sky_energy", PROPERTY_HINT_RANGE, "0,64,0.01"), "set_sky_energy", "get_sky_energy");
ADD_PROPERTY(PropertyInfo(Variant::OBJECT, "sky_cover", PROPERTY_HINT_RESOURCE_TYPE, "Texture2D"), "set_sky_cover", "get_sky_cover");
ADD_PROPERTY(PropertyInfo(Variant::COLOR, "sky_cover_modulate"), "set_sky_cover_modulate", "get_sky_cover_modulate");
ADD_GROUP("Ground", "ground_");
ADD_PROPERTY(PropertyInfo(Variant::COLOR, "ground_bottom_color", PROPERTY_HINT_COLOR_NO_ALPHA), "set_ground_bottom_color", "get_ground_bottom_color");
@ -212,6 +239,8 @@ uniform vec4 sky_top_color : hint_color = vec4(0.385, 0.454, 0.55, 1.0);
uniform vec4 sky_horizon_color : hint_color = vec4(0.646, 0.656, 0.67, 1.0);
uniform float sky_curve : hint_range(0, 1) = 0.15;
uniform float sky_energy = 1.0;
uniform sampler2D sky_cover : hint_black_albedo;
uniform vec4 sky_cover_modulate : hint_color = vec4(1.0, 1.0, 1.0, 1.0);
uniform vec4 ground_bottom_color : hint_color = vec4(0.2, 0.169, 0.133, 1.0);
uniform vec4 ground_horizon_color : hint_color = vec4(0.646, 0.656, 0.67, 1.0);
uniform float ground_curve : hint_range(0, 1) = 0.02;
@ -265,6 +294,9 @@ void sky() {
}
}
vec4 sky_cover_texture = texture(sky_cover, SKY_COORDS);
sky += (sky_cover_texture.rgb * sky_cover_modulate.rgb) * sky_cover_texture.a * sky_cover_modulate.a * sky_energy;
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;
@ -281,6 +313,7 @@ ProceduralSkyMaterial::ProceduralSkyMaterial() {
set_sky_horizon_color(Color(0.6463, 0.6558, 0.6708));
set_sky_curve(0.15);
set_sky_energy(1.0);
set_sky_cover_modulate(Color(1, 1, 1));
set_ground_bottom_color(Color(0.2, 0.169, 0.133));
set_ground_horizon_color(Color(0.6463, 0.6558, 0.6708));