cube.tscn

[gd_scene load_steps=5 format=2]

[ext_resource path="res://worlnoise.bmp" type="Texture3D" id=1]

[sub_resource type="CubeMesh" id=1]

custom_aabb = AABB( 0, 0, 0, 0, 0, 0 )
flip_faces = false
size = Vector3( 2, 2, 2 )
subdivide_width = 0
subdivide_height = 0
subdivide_depth = 0

[sub_resource type="Shader" id=2]

code = "shader_type spatial;
render_mode skip_vertex_transform, cull_back;

uniform sampler3D volume;


varying vec3 world;
varying vec3 cam_pos;
void vertex() {
	world = (WORLD_MATRIX*vec4(VERTEX, 1.0)).xyz;
	VERTEX = (MODELVIEW_MATRIX * vec4(VERTEX, 1.0)).xyz;
	cam_pos = CAMERA_MATRIX[3].xyz;
}

void fragment() {
	vec3 eye_vec = normalize(world-cam_pos);
	vec3 col = vec3(0.0);
	vec3 p = world;
	float d = 0.0;
	for(int i=0;i<100;i++) {
		float h = smoothstep(0.7, 1.0, texture(volume, p*0.1+0.1).x)*0.5;
		p += eye_vec*0.1;
		d = (1.0-d)*h+d;
		if(d>1.0) {
			break;
		}

	}
	ALBEDO = vec3(1.0);
	ALPHA = d;
}"

[sub_resource type="ShaderMaterial" id=3]

render_priority = 0
shader = SubResource( 2 )
shader_param/volume = ExtResource( 1 )

[node name="Spatial" type="Spatial"]

[node name="MeshInstance" type="MeshInstance" parent="."]
transform = Transform( 5, 0, 0, 0, 5, 0, 0, 0, 5, 0, 0, 0 )
layers = 262145
material_override = null
cast_shadow = 1
extra_cull_margin = 0.0
use_in_baked_light = false
lod_min_distance = 0.0
lod_min_hysteresis = 0.0
lod_max_distance = 0.0
lod_max_hysteresis = 0.0
mesh = SubResource( 1 )
skeleton = NodePath("..")
material/0 = SubResource( 3 )