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; IOs 
const $pivot_io = 9 
const $scanner_io = 8 
const $scanner_pivot_phase = 0 
; Can be set to 0, -pi/2, +pi/2 or +pi for orientation correction 
var $screen = screen(0, 0) ; dashboard on IO 2, screen on channel 0
var $color = color( 0, 0, 0, 0)
var $blue = 0
var $green = 0
var $red = 0
; Scan Settings 
const $max_distance = 10000 ; meters 
const $ore = "Ti"

init 
	$screen.blank()

update ; Rotate the pivot 
	output_number($pivot_io, 0, -0.1)

; Gradually clear the screen to black
	$screen.draw(0, 0, color(0, 0, 0, 1), $screen.width, $screen.height)

; Useful values
	var $half_width = $screen.width / 2
	var $half_height = $screen.height / 2
	var $steps = $half_height

; Compute a normalized position given the current angle of the pivot
	var $angle = input_number($pivot_io, 0) * 2pi + $scanner_pivot_phase
	var $x = sin($angle)
	var $y = cos($angle)

; Loop through steps
	repeat $steps ($i)
		var $step = ($i + 1) / $steps
		var $distance = $step * $max_distance
	; Send the scan distance to the pivot on the appropriate channel
		output_number($scanner_io, $i, $distance)
	; Get the scanned composition from the scanner
		var $composition = input_text($scanner_io, $i)
	; If we detected the ore, draw a pixel based on its density
		if $composition.$ore
			
			$blue = 0
			$green = 0
			$red = 0
			var $density_color = color(0, 0, 0, 255) ; black
			;y = ((205 * x) / 255) + 50
			if  $composition.$ore <= 0.02
				$blue = ((225 * 12700 * $composition.$ore) / 255) + 30
			if 	$composition.$ore >= 0.001 and $composition.$ore <= 0.15
				$green = ((225 * 1700 * $composition.$ore) / 255) + 30
			if 	$composition.$ore >= 0.05 and $composition.$ore <= 1
				$red = ((205 * 255 * $composition.$ore) / 255) + 50
			
			print ($composition.$ore)
			print ($red, $green, $blue)
			$density_color = color($red, $green, $blue) ; gradient map from black to red/green
		
			var $xx = (1 - $x * $step) * $half_width
			var $yy = (1 - $y * $step) * $half_height
			$screen.draw_point($xx, $yy, $density_color)

; Draw a red dot at our current location (center of the screen)
	$screen.draw_point($half_width, $half_height, red)
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