107 lines
3.1 KiB
Python
Executable file
107 lines
3.1 KiB
Python
Executable file
#! /usr/bin/env python
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# -*- coding: utf-8 -*-
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import math
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import time
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import numpy as np
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import roslib
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import rospy
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from std_msgs.msg import Float64
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import tf
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import dynamic_reconfigure.server
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from detect_targets.cfg import TriangleConfig
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from detect_targets.msg import control
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from detect_targets.msg import component_centers
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class Triangle:
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def on_reconf(self, config, level):
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self.camera_angle = config['camera_angle']*math.pi/360.0 # theta/2
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self.tan_cam = math.tan(self.camera_angle)
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self.target_width = config['target_width']
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self.target_depth = config['target_depth']
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return config
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def on_comp(self, msg):
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if len(msg.data) > 2:
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msg.data.sort(key=lambda component: -component.nb_vertex)
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pts = msg.data[0:3]
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pts.sort(key=lambda component: -component.y)
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H = pts[0]
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L = pts[2]
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R = pts[1]
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if pts[1].x < pts[2].x:
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L = pts[1]
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R = pts[2]
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self.triangle(L, H, R)
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def triangle(self, L, H, R):
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now = rospy.Time.now()
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self.Gx = (L.x + H.x + R.x)*.333333
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Gy = (L.y + H.y + R.y)*.333333
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w = R.x - L.x
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h = H.x - .5 * (R.x + L.x)
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self.alpha = math.atan(h*self.target_width/(1e-5+w*self.target_depth))
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ca = math.cos(self.alpha)
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sa = math.sin(self.alpha)
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# why *.5.... I don't know.
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self.d = self.target_width*ca/(w*self.tan_cam) * .5
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self.z = -Gy*self.d*self.tan_cam
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self.br.sendTransform((self.d * ca, self.d * sa, self.z),
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tf.transformations.quaternion_from_euler(
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0, 0, self.alpha + math.pi),
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now,
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'drone', 'target')
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self.angular_z_pub.publish(data=-self.Gx * self.camera_angle)
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self.linear_z_pub.publish(data=self.z)
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self.linear_y_pub.publish(data=-self.alpha)
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self.linear_x_pub.publish(data=self.d)
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def __init__(self):
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self.Gx = 0
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self.alpha = 0
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self.d = 0
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self.z = 0
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self.camera_angle = 80*math.pi/180./2.0
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self.tan_cam = math.tan(self.camera_angle)
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self.target_width = 1
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self.target_depth = .2
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self.angular_z_pub = rospy.Publisher(
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'angular_z', Float64, queue_size=1)
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self.linear_z_pub = rospy.Publisher(
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'linear_z', Float64, queue_size=1)
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self.linear_y_pub = rospy.Publisher(
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'linear_y', Float64, queue_size=1)
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self.linear_x_pub = rospy.Publisher(
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'linear_x', Float64, queue_size=1)
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self.comp_sub = rospy.Subscriber(
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"component_centers", component_centers, self.on_comp, queue_size=1)
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self.config_srv = dynamic_reconfigure.server.Server(
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TriangleConfig, self.on_reconf)
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self.br = tf.TransformBroadcaster()
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if __name__ == '__main__':
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rospy.init_node('triangle_control', anonymous=True)
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triangle = Triangle()
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rospy.spin()
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