java - Graphics and negative ordinate -


i want display points can have negative coordinates (x , y). now, points have negative x seem correctly displayed (ie. : @ left of points have positive x).

however, points have negative y displayed @ top of graph : exemple, point y = -5 displayed in top of point y = -3...

how can reverse graphics' displaying ?

my (simple) code :

package general_classes;  import javax.swing.*; import java.awt.*; import java.util.list;  public class graph extends jframe {      private list<storabledata> list_detected_points;     private list<storabledata> list_all_points;     private cupple barycenter;      public graph(string title, list<storabledata> list_all_points, list<storabledata> list_detected_points) {          double scaling_coef = 200;         double move_x = 500, move_y = 500;           this.add(new jpanel() {             private graphics graphics;              int x, y;             private void drawpoint(cupple storable_data) {                 x = (int) (storable_data.getnumber(0) * scaling_coef + move_x);                 y = (int) (storable_data.getnumber(1) * scaling_coef + move_y);                 graphics.fillrect(x, y, 10, 10);                 graphics.drawstring(storable_data.tostring(), x - 5, y - 5);             }              @override             public void paint(graphics graphics) {                 this.graphics = graphics;                  for(storabledata storable_data : list_all_points) {                     graphics.setcolor(color.white);                     this.drawpoint((cupple) storable_data);                 }                  if(list_detected_points != null) {                     (storabledata storable_data : list_detected_points) {                         graphics.setcolor(color.red);                         this.drawpoint((cupple) storable_data);                      }                 }              }         });          this.setvisible(true);     }  }

assuming receive points need draw, first find minimum , maximum coordinates on each dimension. this, can obtain scaling factor (using distance between min , max, , size of drawing box have) , offset (so min correspond 0 of draw box).

then create affinetransform data above correctly convert each point when drawing it.


Comments

Post a Comment

Popular posts from this blog

commonjs - How to write a typescript definition file for a node module that exports a function? -

consider, toml node module can use: // toml.d.ts declare module toml { export function parse(value:string):any; } declare module "toml" { export = toml; } then: /// <reference path="../../../../../defs/toml/toml.d.ts"/> import toml = require('toml'); toml.parse(...); however, node module export single function, such 'glob' ( https://github.com/isaacs/node-glob ). the node usage of module be: var glob = require("glob") glob("*.js", {}, callback(err, files) { ... }); you'd naively expect this: // glob.d.ts declare function globs(paths:string, options:any, callback:{(err:any, files:string[]):void; ...but because typescripts 'import' semantics bit strange, seems can use 'import .. = require()' statement alias modules . trying call: /// <reference path="../../../../../defs/glob/glob.d.ts"/> import blog = require('glob'); results in: error ts2072: mod...
Read more

openid - Okta: Failed to get authorization code through API call -

i'm integrating okta own idp server using okta's api. i'm implementing authorization code flow following steps below: in own server, use /api/v1/authn endpoint sessiontoken. use sessiontoken obtain authorization calling endpoint: /oauth2/v1/authorize?client_id=" + clientid + "&sessiontoken=" + sessiontoken + "&response_type=code&response_mode=query&scope=openid&redirect_uri=" + redirecturl + "&state=evanyang&nonce=" it's supposed return response status code 302 , location header containing redirect url code value. however, keep getting response status code 200 , without location header, html body saying "you using unsupported browser." , "javascript disabled on browser." according api documentation: http://developer.okta.com/docs/api/resources/oidc.html#authentication-request , sessiontoken parameter sufficient this: an okta one-time sessiontoken. allows api-based ...
Read more

ios - Change Storyboard View using Seague -

i have following code checks connection server, , depending on want change views if no connection found. nsstring *connect = [nsstring stringwithcontentsofurl:[nsurl urlwithstring:@"http://myserver.com"] encoding:nsutf8stringencoding error:nil]; if (connect == null) { [self performseguewithidentifier:@"network_failure" sender:self]; } else { // other code here } my problem not change views. have added storyboard segue between 2 views identifier of network_failure . not have navigation controller or that, problem? thanks help! no not problem. first of all, in objectivec exists nil object oriented null . must use that. so: if(connect == nil) or better: if(!connect) so due fact nil not same of null , probably code does't enter in if scope . you have been able discover breakpoint. anyway: be sure set trigger segue (line) 2 view controller , , name network_failure (that not best name. should instead view1toview2 ) as, m...
Read more