shader_type spatial;
uniform vec3 target_position = vec3(0, 1.28, 1);
varying vec3 world_position;

uniform vec2 pixel_size = vec2(0.02, 0.02);

void vertex()
{
	world_position = (MODEL_MATRIX * vec4(VERTEX, 1.0)).xyz;
}

void fragment() {
	vec3 c = COLOR.rgb;
	float offset_x = floor((world_position.x-target_position.x) / 0.64) * 0.64;
	float offset_y = floor((world_position.y-target_position.y) / 0.64) * 0.64;
	float offset_z = floor((world_position.z-target_position.z) / 0.64) * 0.64;
	float brightness = clamp(1.0 + (offset_y)* 0.4,0.0,1.0);
	float contrast = 1.0 - (abs(offset_y)) * 0.05;
	float saturation = 1.0 - (abs(offset_y)) * 0.05;
    c.rgb = mix(vec3(0.0), c.rgb, brightness);
    c.rgb = mix(vec3(0.5), c.rgb, contrast);
    c.rgb = mix(vec3(dot(vec3(1.0), c.rgb) * 0.33333), c.rgb, saturation);
	ALBEDO = c.rgb;
}