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 ivec2 albedo_texture_size;
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;

// Controls the frequency of the waves
uniform float amount : hint_range(0.0, 100.0, 0.01) = 20.0;

// Controls the overall distortion intensity
uniform float move = 1.0;

// Base height of the sinusoidal bands
uniform float bandsize = 0.1;

// Speed of wave movement
uniform float speed = 1.0;

void vertex() {
    // Center UV to create symmetrical effect
    vec2 uv = UV - 0.5;

    // Adds movement with time
    uv.y += TIME * speed;

    // Calculates animated sinusoidal value
    float wave = sin(uv.y * amount) + bandsize;

    // Applies distortion along the sphere normal
    VERTEX += NORMAL * wave * move;
}

void fragment() {
    // Center UV to keep the same pattern as vertex shader
    vec2 uv = UV - 0.5;

    // Animates the waves on the Y axis
    uv.y += TIME * speed;

    // Creates the same sinusoidal function to draw the pattern
    float wave = sin(uv.y * amount) + bandsize;

    // Sets the band color based on the sinusoidal value
    ALBEDO = vec3(wave);

	vec2 base_uv = UV;

	vec4 albedo_tex = texture(texture_albedo, base_uv);
	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;
	}