// NOTE: Shader automatically converted from Godot Engine 4.3.stable's StandardMaterial3D.

shader_type spatial;
render_mode blend_mix, depth_draw_opaque, cull_disabled, diffuse_burley, specular_schlick_ggx;

uniform vec4 albedo : source_color;
uniform sampler2D texture_albedo : source_color, filter_linear_mipmap, repeat_enable;
uniform float point_size : hint_range(0.1, 128.0, 0.1);

uniform float roughness : hint_range(0.0, 1.0);
uniform sampler2D texture_metallic : hint_default_white, filter_linear_mipmap, repeat_enable;
uniform vec4 metallic_texture_channel;
uniform sampler2D texture_roughness : hint_roughness_r, filter_linear_mipmap, repeat_enable;

uniform float specular : hint_range(0.0, 1.0, 0.01);
uniform float metallic : hint_range(0.0, 1.0, 0.01);

uniform vec3 uv1_scale;
uniform vec3 uv1_offset;
uniform vec3 uv2_scale;
uniform vec3 uv2_offset;

uniform float debanding_dither;

const vec3 noise_magic = vec3(0.06711056, 0.00583715, 52.9829189);

void vertex() {
	UV = UV * uv1_scale.xy + uv1_offset.xy;
}

void fragment() {
	vec2 base_uv = UV;

	vec4 albedo_tex = texture(texture_albedo, base_uv);
	
	// Add noise to albedo to hide banding
    float offset = fract(noise_magic.z * fract(dot(FRAGCOORD.xy, noise_magic.xy)));
    albedo_tex.rgb += vec3(offset, 1.0 - offset, offset) * debanding_dither;
	
	ALBEDO = albedo.rgb * albedo_tex.rgb;

	float metallic_tex = dot(texture(texture_metallic, base_uv), metallic_texture_channel);
	METALLIC = metallic_tex * metallic;
	SPECULAR = specular;

	vec4 roughness_texture_channel = vec4(1.0, 0.0, 0.0, 0.0);
	float roughness_tex = dot(texture(texture_roughness, base_uv), roughness_texture_channel);
	ROUGHNESS = roughness_tex * roughness;
}