Adding alpha to moon display

This commit is contained in:
yannk 2022-04-13 11:20:25 +02:00
parent c46f5c0c7e
commit cfe12a3066
4 changed files with 153 additions and 120 deletions

View file

@ -1,6 +1,7 @@
[gd_scene load_steps=22 format=3 uid="uid://b8p2h0rmwy7qn"] [gd_scene load_steps=22 format=3 uid="uid://b8p2h0rmwy7qn"]
[ext_resource type="Material" uid="uid://dpegsmygxcfmv" path="res://maps/materials/basic_ground.material" id="1_lodye"] [ext_resource type="Material" uid="uid://dpegsmygxcfmv" path="res://maps/materials/basic_ground.material" id="1_lodye"]
[ext_resource type="Shader" path="res://maps/shaders/khanat_sky.gdshader" id="1_mheqi"]
[ext_resource type="Texture2D" uid="uid://b5jer2nm17ld" path="res://maps/textures/samayun_tex_001.png" id="1_thm7k"] [ext_resource type="Texture2D" uid="uid://b5jer2nm17ld" path="res://maps/textures/samayun_tex_001.png" id="1_thm7k"]
[ext_resource type="PackedScene" uid="uid://cveshwnu272vf" path="res://maps/objects/ramp-complex.tscn" id="2_4eueh"] [ext_resource type="PackedScene" uid="uid://cveshwnu272vf" path="res://maps/objects/ramp-complex.tscn" id="2_4eueh"]
[ext_resource type="PackedScene" uid="uid://omess6wwwwcq" path="res://maps/objects/ramp-moving.tscn" id="3_bvbgo"] [ext_resource type="PackedScene" uid="uid://omess6wwwwcq" path="res://maps/objects/ramp-moving.tscn" id="3_bvbgo"]
@ -16,126 +17,8 @@
[ext_resource type="PackedScene" uid="uid://bfo13c5k8xu0x" path="res://maps/natural_ground.tscn" id="12_r7x73"] [ext_resource type="PackedScene" uid="uid://bfo13c5k8xu0x" path="res://maps/natural_ground.tscn" id="12_r7x73"]
[ext_resource type="PackedScene" uid="uid://mdsxnqsijdqv" path="res://maps/dispensaire_01.tscn" id="13_ald41"] [ext_resource type="PackedScene" uid="uid://mdsxnqsijdqv" path="res://maps/dispensaire_01.tscn" id="13_ald41"]
[sub_resource type="Shader" id="Shader_av6ac"]
code = "
// NOTE: Shader automatically converted from Godot Engine 4.0.alpha5's PhysicalSkyMaterial.
shader_type sky;
uniform float rayleigh : hint_range(0, 64) = 2.0;
uniform vec4 rayleigh_color : hint_color = vec4(0.3, 0.405, 0.6, 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(0.69, 0.729, 0.812, 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(0.1, 0.07, 0.034, 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;
uniform sampler2D samayun : hint_albedo;
uniform float samayun_scale : hint_range(0, 1.0) = 0.25;
uniform vec3 samayun_position = vec3( 0.0, 0.5, 0.0 );
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;
}
// vec2 samayun_uv = uv_moon(samayun_position, samayun_scale, SKY_COORDS);
// COLOR += texture(samayun, samayun_uv).rgb;
if (length(EYEDIR - normalize(samayun_position)) < 0.5 ) { // we are in the area of the sky where samayun is placed
//We define a local plane tangent to the skydome at samayun_position
//We work with everything normalized
vec3 n1 = normalize(cross(samayun_position,vec3(0,1,0)));
vec3 n2 = normalize(cross(samayun_position,n1));
//We project EYEDIR on this plane
float x = dot(EYEDIR,n1) ;
float y = dot(EYEDIR,n2) ;
COLOR += texture(samayun, vec2(x,y)+vec2(0.5)).rgb;
//COLOR = mix(COLOR, texture(samayun, vec2(x,y)+vec2(0.5)).rgb, clamp (samayun_position.y, 0.0, 1.0)) ;
}
}
"
[sub_resource type="ShaderMaterial" id="ShaderMaterial_s2q0l"] [sub_resource type="ShaderMaterial" id="ShaderMaterial_s2q0l"]
shader = SubResource( "Shader_av6ac" ) shader = ExtResource( "1_mheqi" )
shader_param/rayleigh = 2.0 shader_param/rayleigh = 2.0
shader_param/rayleigh_color = Color(0.3, 0.405, 0.6, 1) shader_param/rayleigh_color = Color(0.3, 0.405, 0.6, 1)
shader_param/mie = 0.005 shader_param/mie = 0.005
@ -147,7 +30,7 @@ shader_param/ground_color = Color(0.1, 0.07, 0.034, 1)
shader_param/exposure = 0.1 shader_param/exposure = 0.1
shader_param/dither_strength = 1.0 shader_param/dither_strength = 1.0
shader_param/samayun_scale = 0.201 shader_param/samayun_scale = 0.201
shader_param/samayun_position = Vector3(0.226, 0.161, 0.065) shader_param/samayun_position = Vector3(1.269, 0.931, -0.345)
shader_param/samayun = ExtResource( "1_thm7k" ) shader_param/samayun = ExtResource( "1_thm7k" )
[sub_resource type="Sky" id="Sky_fa16p"] [sub_resource type="Sky" id="Sky_fa16p"]

View file

@ -0,0 +1,115 @@
// NOTE: Shader automatically converted from Godot Engine 4.0.alpha5's PhysicalSkyMaterial.
shader_type sky;
uniform float rayleigh : hint_range(0, 64) = 2.0;
uniform vec4 rayleigh_color : hint_color = vec4(0.3, 0.405, 0.6, 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(0.69, 0.729, 0.812, 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(0.1, 0.07, 0.034, 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;
uniform sampler2D samayun : hint_albedo;
uniform float samayun_scale : hint_range(0, 1.0) = 0.25;
uniform vec3 samayun_position = vec3( 0.0, 0.5, 0.0 );
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;
}
// vec2 samayun_uv = uv_moon(samayun_position, samayun_scale, SKY_COORDS);
// COLOR += texture(samayun, samayun_uv).rgb;
if (length(EYEDIR - normalize(samayun_position)) < 0.5 ) { // we are in the area of the sky where samayun is placed
//We define a local plane tangent to the skydome at samayun_position
//We work with everything normalized
vec3 n1 = normalize(cross(samayun_position,vec3(0,1,0)));
vec3 n2 = normalize(cross(samayun_position,n1));
//We project EYEDIR on this plane
float x = dot(EYEDIR,n1) ;
float y = dot(EYEDIR,n2) ;
COLOR += texture(samayun, vec2(x,y)+vec2(0.5)).rgb * texture(samayun, vec2(x,y)+vec2(0.5)).a;
//COLOR = mix(COLOR, texture(samayun, vec2(x,y)+vec2(0.5)).rgb, clamp (samayun_position.y, 0.0, 1.0)) ;
}
}

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