Comments for Doswa http://doswa.com/blog Programming, physics, mathematics Sat, 13 Mar 2010 08:50:43 +0000 http://wordpress.org/?v=2.7 hourly 1 Comment on Line Segment to Circle Collision/Intersection Detection by David http://doswa.com/blog/2009/07/13/circle-segment-intersectioncollision/comment-page-1/#comment-1090 David Thu, 11 Mar 2010 20:28:33 +0000 http://doswa.com/?p=158#comment-1090 @Ben@CHINA I don't think I understand. The algorithm works fine if A and B are both inside the circle. The font you're seeing is probably Georgia, but it could also be Times New Roman, Times, or a generic serif font, depending on which fonts you have installed. @Ben@CHINA

I don’t think I understand. The algorithm works fine if A and B are both inside the circle.

The font you’re seeing is probably Georgia, but it could also be Times New Roman, Times, or a generic serif font, depending on which fonts you have installed.

]]> Comment on AVRDUDE 5.8 with FTDI bitbang patch on Linux by Peeter http://doswa.com/blog/2009/12/20/avrdude-58-with-ftdi-bitbang-patch-on-linux/comment-page-1/#comment-1087 Peeter Thu, 11 Mar 2010 08:56:43 +0000 http://doswa.com/blog/?p=292#comment-1087 Hi, I've struggled with the FedoraCore10 and libusb and libftdi to get things working without sudoing the application that uses libftdi. My problem is that kernel does load ftdi_sio module and set up permissions for /dev/ttyUSB0 and /dev/bus/usb/*/* outside the /etc/udev descriptions. So the access rights description coming with libftdi do not work. I made special file "/etc/udev/rules.d/local.rules" and wrote there KERNEL=="*", MODE="0660", BUS=="usb", SYSFS{idVendor}=="0403", GROUP="ftdi" The users that need to use the usb device are in group "ftdi" in this case. Now the /dev/ttyUSB0 and /dev/bus/usb/004/003 are with correct permissions. Hi,

I’ve struggled with the FedoraCore10 and libusb and libftdi to get things working without sudoing the application that uses libftdi. My problem is that kernel does load ftdi_sio module and set up permissions for /dev/ttyUSB0 and /dev/bus/usb/*/* outside the /etc/udev descriptions. So the access rights description coming with libftdi do not work.

I made special file “/etc/udev/rules.d/local.rules” and wrote there

KERNEL==”*”, MODE=”0660″, BUS==”usb”, SYSFS{idVendor}==”0403″, GROUP=”ftdi”

The users that need to use the usb device are in group “ftdi” in this case. Now the /dev/ttyUSB0 and /dev/bus/usb/004/003 are with correct permissions.

]]> Comment on Line Segment to Circle Collision/Intersection Detection by Ben@CHINA http://doswa.com/blog/2009/07/13/circle-segment-intersectioncollision/comment-page-1/#comment-1086 Ben@CHINA Thu, 11 Mar 2010 05:05:28 +0000 http://doswa.com/?p=158#comment-1086 Your procedure is not complete for checking the interaction. For example, both A and B are inside the circle. So, you should add a farthest point in your algorithm. Only when the farthest point of this segment is outside the circle, the intersection does exit. Another algorithm: http://local.wasp.uwa.edu.au/~pbourke/geometry/sphereline/ P.S. The font of your site is beautiful, could you tell me what's the font type? Thanks. Your procedure is not complete for checking the interaction. For example, both A and B are inside the circle. So, you should add a farthest point in your algorithm. Only when the farthest point of this segment is outside the circle, the intersection does exit.
Another algorithm:
http://local.wasp.uwa.edu.au/~pbourke/geometry/sphereline/

P.S.
The font of your site is beautiful, could you tell me what’s the font type?

Thanks.

]]> Comment on Line Segment to Circle Collision/Intersection Detection by David http://doswa.com/blog/2009/07/13/circle-segment-intersectioncollision/comment-page-1/#comment-1069 David Sun, 07 Mar 2010 00:54:01 +0000 http://doswa.com/?p=158#comment-1069 @Joseph Winston S What sort of robot are you building? @Joseph Winston S
What sort of robot are you building?

]]> Comment on Line Segment to Circle Collision/Intersection Detection by Joseph Winston S http://doswa.com/blog/2009/07/13/circle-segment-intersectioncollision/comment-page-1/#comment-1065 Joseph Winston S Sat, 06 Mar 2010 14:31:02 +0000 http://doswa.com/?p=158#comment-1065 Hi! Well explained and i am looking for an implementation for the spatial hyper redundant robot link interference with staggered pipes . I am also implementing through python. Thanks for the post. It really helped me to visualize and implement obstacle avoidance. S. Joseph Winston Hi! Well explained and i am looking for an implementation for the spatial hyper redundant robot link interference with staggered pipes . I am also implementing through python.
Thanks for the post. It really helped me to visualize and implement obstacle avoidance.
S. Joseph Winston

]]> Comment on AVRDUDE 5.8 with FTDI bitbang patch on Linux by Mic http://doswa.com/blog/2009/12/20/avrdude-58-with-ftdi-bitbang-patch-on-linux/comment-page-1/#comment-1029 Mic Fri, 26 Feb 2010 19:47:27 +0000 http://doswa.com/blog/?p=292#comment-1029 Great stuff, patched into avrdude 5.10 - works fine! I burned arduino 2009 with ATmega168. Great stuff, patched into avrdude 5.10 - works fine!
I burned arduino 2009 with ATmega168.

]]> Comment on Wacom Jitter Fix (for Linux) by David http://doswa.com/blog/2010/01/01/wacom-jitter-fix-for-linux/comment-page-1/#comment-960 David Wed, 17 Feb 2010 08:34:16 +0000 http://doswa.com/blog/?p=351#comment-960 @M_Woody: No, the commands will not be the same. You might want to try looking around the preferences/control panel for your tablet driver. If you're lucky, you'll find something like "smoothing" or "noise suppression". If not, there's not much I can do to help—I've never used a Wacom tablet on any operating system other than Linux. Good luck! @M_Woody:

No, the commands will not be the same.

You might want to try looking around the preferences/control panel for your tablet driver. If you’re lucky, you’ll find something like “smoothing” or “noise suppression”. If not, there’s not much I can do to help—I’ve never used a Wacom tablet on any operating system other than Linux.

Good luck!

]]> Comment on SparkFun’s FTDI Basic Breakout as an AVR programmer by problems uploading to mignon gamekit arduino // kaotec http://doswa.com/blog/2009/12/20/sparkfuns-ftdi-basic-breakout-as-an-avr-programmer/comment-page-1/#comment-956 problems uploading to mignon gamekit arduino // kaotec Tue, 16 Feb 2010 21:38:13 +0000 http://doswa.com/blog/?p=308#comment-956 [...] I have to try this, but for now that doesn’t really solve my what the hell is the CTS pin [...] [...] I have to try this, but for now that doesn’t really solve my what the hell is the CTS pin [...]

]]> Comment on Wacom Jitter Fix (for Linux) by M_Woody http://doswa.com/blog/2010/01/01/wacom-jitter-fix-for-linux/comment-page-1/#comment-954 M_Woody Tue, 16 Feb 2010 09:20:14 +0000 http://doswa.com/blog/?p=351#comment-954 Great, too bad I don't have Linux :-/ I'll do some looking around on my hard-drive, the commands should be the same... Shouldn't they? Great, too bad I don’t have Linux :-/ I’ll do some looking around on my hard-drive, the commands should be the same… Shouldn’t they?

]]> Comment on Fourth order Runge-Kutta numerical integration by Improved RK4 Implementation | Doswa http://doswa.com/blog/2009/01/02/fourth-order-runge-kutta-numerical-integration/comment-page-1/#comment-874 Improved RK4 Implementation | Doswa Sat, 23 Jan 2010 14:54:33 +0000 http://doswa.com/?p=16#comment-874 [...] you’re new to numerical integration or even RK4 integration, please read my other post first. It’s easier to understand because it’s a less generalized function. def [...] [...] you’re new to numerical integration or even RK4 integration, please read my other post first. It’s easier to understand because it’s a less generalized function. def [...]

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