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Draw and not draw

[4 Replies]
- 07-Mar-2013 05:33 PM
- Forum: Programming Questions
Hello!

In my code, when you click, a line is drawn with the first point being the center point.

There's an ellipse that is draggable. I want that processing doesn't draw the track of the ellipse, only the lines from the center.

Here's the code.

Thank you!
2. //code with help of Casey Reas and Ben Fry
4. //declare variables for draggables
5. int er = 10;
6. boolean hover = false;
7. boolean locked = false;
8. float newy, newx, ex, ey;
11. void setup() {
12. size (500, 500);
13. smooth();
14. rectMode(CENTER);
15. ex = 50;
16. ey = 420;
17. background(255);
18. }
23. void draw () {
24. //draw ellipse
25. ellipse (ex, ey, er, er);
27. //check if mouse is on the ellipse
28. if (mouseX > ex-er && mouseX < ex+er && mouseY > ey-er && mouseY < ey+er) {
29. hover = true;
30. }
31. else {
32. hover=false;
33. }
35. //draw center line
36. if (mousePressed==true) {
37. line(250,250, mouseX, mouseY);
38. }
40. }
42. //if mouse is clicked inside the ellipse
43. void mousePressed() {
44. if (hover) {
45. locked = true;
46. fill (255);
47. }
48. else {
49. locked = false;
50. }
51. newx = mouseX-ex;
52. newy = mouseY-ey;
53. }
56. //if mouse is dragged while clicking on the object, make it move
57. void mouseDragged () {
58. if (locked) {
59. ex = mouseX - newx;
60. ey = mouseY - newy;
61. }
62. }
65. //if mouse released, return to no motion state
66. void mouseReleased () {
67. locked = false;
68. }

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