Lines Matching +full:down +full:- +full:scaling

2 * is the definition of +/- values practical or counterintuitive?
13 that produce three-dimensional data in relation to the world where it is
37 reference. This means that the sensor may be flipped upside-down, left-right,
47 Device-to-world examples for some three-dimensional sensor types:
49 - Accelerometers have their world frame of reference toward the center of
53   this point. Up and down in the world relative to the device frame of
57   as the gravity vector is projected 1:1 onto the sensors (z)-axis.
67      +--------+             +--------+
69      +--------+             +--------+
80      (---------)
81      !         !           y: -g
85      !         !  x: +g <- z: +g  -> x: -g
90      (---------)
93 - Magnetometers (compasses) have their world frame of reference relative to the
94   geomagnetic field. The system orientation vis-a-vis the world is defined with
103      (---------)
113      (---------)
129 - Gyroscopes detects the movement relative the device itself. The angular
134   counter-clockwise according to the right-hand rule.
137      (---------)     y > 0
138      !         !     v---\
141      !         !      <--\
143      ! 1  2  3 !       --/
147      (---------)
154 To achieve this, use the device tree property "mount-matrix" for the sensor.
158 the resulting values from the sensor, after scaling to proper units, should be
159 multiplied by this matrix to give the proper vectors values in three-dimensional
185 mount-matrix = "1", "0", "0",
190 compensate by performing a -30 degrees rotation around the X axis:
192 mount-matrix = "1", "0", "0",
194                "0", "-0.5", "0.866";
197 upside-down:
199 mount-matrix = "0.998", "0.054", "0",
200                "-0.054", "0.998", "0",
203 ???: this does not match "180 degrees" - factors indicate ca. 3 degrees compensation