c# - Difference in two angles in radians? -


i have simple chart whereby user can determine start & end direction in radians. control draws chart using override of onrender. drawing arcs streamgeometrycontext.arcto. method has islargearc property determines how arc drawn (true > 180 degrees (pi), false < 180 degrees). determining value condition works fine:

 //rule not exceed 180 degrees in direction (radian), islargearc= false else true  if (start < math.pi && (end - start) < math.pi || //currently unknow condition in here deal < pi when start angle > end angle?)   {      //islargearc = false;   }   else   {      //islargearc= true;   }

enter image description here

the issue comes when start < end. e.g. 270 degrees 120 degrees. need condition satisfy angle on 180 degrees (pi) in situation. maths not strong point. think need add pi*2 end , somehow compare 2 values not sure on how achieve this?

well, add full circle end, (or start; according direction) angle e.g.:

if (start < end)     start += 2 * math.pi; //full circle in radians.

this way you'll add full circle end angle, doesn't change position drawing , results in valid , correct angle if subtract them (start - end).

although must say, expect start > endcondition.

if start > end or visa versa, tells direction.


Comments

Post a Comment

Popular posts from this blog

php - Wordpress website dashboard page or post editor content is not showing but front end data is showing properly -

Image
recently have uploaded wordpress site onto server. have uploaded wordpress site in sub-folder under root folder ../root(domain root folder)/wordpress (where host wordpress folder). now problem content data in page or post in dashboard of wordpress admin panel not showing - see image. but data showing in front view - see image. if not browser cache issue , not issue happened tinymce editor during upgrade; try add config file: define('concatenate_scripts', false);
Read more

How to get the ip address of VM and use it to configure SSH connection dynamically in Ansible -

i trying ip address of vm , trying use establish ssh vm. following script: --- - hosts: localhost become: yes connection: local gather_facts: false serial: 1 vars_files: - createvmvars.yml tasks: - name: gathering vm info. vsphere_guest: vcenter_hostname: "{{vcenter_hostname}}" username: "{{vcenter_username}}" password: "{{vcenter_password}}" guest: "{{guest_name}}" vmware_guest_facts: yes register: var - debug: msg="{{var.ansible_facts.hw_eth0.ipaddresses[0]}}" - name: establishing ssh connection. script: /home/shasha/devops/scripts/ssh_configure.sh "{{var.ansible_facts.hw_eth0.ipaddresses[0]}}" following content of ssh_configure.sh : #!/bin/sh ssh-keygen -t rsa ssh-copy-id $1 but when running playbook, getting following error while executing third task: error! 'var' undefined but debug module(second task) printin
Read more

javascript - Get parameter of GET request -

i make request: createxhrrequest( "get", fileurl, function( err, response ) { if( err ) { alert( "error get!" ); } alert(response); }); and full response: { "status" : "ok", "message" : "jvberi0xljqkjdduxdgkmy how can jvberi0xlj ? i try response.message , response["message"]. nothing works. just simple access this: var json = json.parse(response); json.message
Read more