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fixup! Add debug tool to follow_wall_angle.
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import cv2 | ||
import numpy as np | ||
import math | ||
import osgar.explore | ||
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NO_MEASUREMENT = 0 | ||
MAX_OBSTACLE_DISTANCE = 20 | ||
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def draw_scan(scan, max_obstacle_distance=None, scan_left=135, scan_right=-135): | ||
if max_obstacle_distance is None: | ||
max_obstacle_distance = MAX_OBSTACLE_DISTANCE | ||
n = len(scan) | ||
scan = np.asarray(scan) / 1000 | ||
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angles = np.linspace(math.radians(scan_right), math.radians(scan_left), n).reshape((1, -1)) | ||
angles_cos = np.cos(angles) | ||
angles_sin = np.sin(angles) | ||
is_valid = scan != NO_MEASUREMENT | ||
valid_scan = scan[is_valid] | ||
is_valid = is_valid.reshape((1, -1)) | ||
acoss = angles_cos[is_valid] | ||
asins = angles_sin[is_valid] | ||
x = acoss * valid_scan | ||
y = asins * valid_scan | ||
far_map = valid_scan > max_obstacle_distance | ||
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height_px = 768 | ||
width_px = 1024 | ||
img = np.zeros((height_px, width_px, 3), dtype=np.uint8) | ||
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scale = 50 | ||
for ix, iy, is_far in zip(x, y, far_map): | ||
point = (width_px//2 - int(iy*scale), height_px//2 - int(ix*scale)) | ||
color = (0, 255, 0) if not is_far else (120, 120, 120) | ||
cv2.circle(img, point, radius=3, color=color, thickness=-1) | ||
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point = (width_px//2, height_px//2) | ||
point2 = (width_px//2, height_px//2-20) | ||
cv2.drawMarker(img, point, color=(0, 0, 255), markerType=cv2.MARKER_DIAMOND, thickness=3, markerSize=10) | ||
cv2.line(img, point, point2, thickness=3, color=(0, 0, 255)) | ||
return img |