shader_type spatial;

const float belt_length = 2.85;
const float uv_scale = 3.7313;
uniform float speed = 1.0;
uniform sampler2D basecolor : source_color, repeat_enable, filter_linear;
uniform sampler2D arm : hint_default_white, repeat_enable, filter_linear;
uniform sampler2D normal : hint_normal, repeat_enable, filter_linear;

varying vec2 uv;

void vertex() {
	uv = vec2(UV.x, UV.y - TIME * (speed / belt_length) * uv_scale);
}

void fragment() {
	ALBEDO = texture(basecolor, uv).rgb;
	NORMAL_MAP = texture(normal, uv).rgb;
	vec3 ARM = texture(arm, uv).rgb;
	AO = ARM.r;
	ROUGHNESS = ARM.g;
	METALLIC = ARM.b;
}