Geometric Algebra 幾何学的代数

これは幾何学的代数をテーマにした本

"Geometric Algebra for Computer Science", Leo Dorst, Daniel Fontijne, Stephen Mann (ISBN 9780123749420)

の紹介のために書きました …

Conformal model of 3D space

(Fig.1.1 of the book)

The conformal model is an ample model of the 3D space. Points, lines, planes, circles, spheres and many known geometrical constructions can be represented with algebraic ways in that model.

There are 2 additional bases of this representation space …

Geometric Algebra

This is an article for the book

"Geometric Algebra for Computer Science", Leo Dorst, Daniel Fontijne, Stephen Mann (ISBN 9780123749420)

which is one of the greatest book I've read. This is NOT a review or somesuch. I'm happy if I can report a tiny bit of flavor of …

VL53L1X is a ST's new TOF(time of flight) sensor. ST gives its driver and API library with the dual license. See ST's page for detail. Although that code is for the STM32 platforms primarily, they are written with the highly modular manner and possible to be used with other …

Screen shot of opemMV IDE

I've tried to make a simple and budget local positioning system with openMV cam for the indoor flight of tiny copter. Looks not so good precision but not so bad as a Poor Man's system. A LOITER and LAND flight test with my hachidori copter …

以前紹介した 室内測位システム ではフレームの姿勢をMAVLinkで貰ってるんですが室内なのとコアレスモーターがついてるせいでフレームに載せているコンパスがくるってしまい、それで得られるyawの値も酷いものなので代わりに天井のカムからみたマーカーで推定できるヘッドの方向を使っています.

一般には斜め上からみることになるの …

小さい機体でもSLAMこそが未来だと思うもののさすがに私では手がでないので貧者的局所測位系と名付けて天井に貼り付けたOpenMV cam+魚眼レンズとフレームからの情報を合わせてフレームにのせたマーカーの水平位置を推計す …

M5 propo is a tiny RC transmitter with M5Stack which has MPU-9250 9-axis sensor. It sends control PWM values with the format which Parrot Bebop uses.

There are 4 bars on the LCD. The cyan bar is the roll gage and the green one is the pitch gage. The bottom …

MAVLink をc/c++プログラムから使う簡単な例です. MAVLinkの基本的なインストールや使い方については mavlink github のREADME.mdにある通りですなのですがc/c++プログラムから使う場合にはheaderだけでできている c_library_v2 を使うのがお手軽で …

Hachidori which means 'humming bird' is a remote sensor/actuator board controlled by ArduPilot running on PC. It's intended to contribute to ArduPilot, though it's still in the experimental phase. It's a tiny open project of DCoJA started by DroneWorks Inc. I was a contractor with DroneWorks mainly for porting …