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Vector question?

[2 Replies]
- 12-Oct-2010 08:15 AM
- Forum: Programming Questions
Hello,
I am trying to build a wall(plane) from 2 vectors? I know how to do it on the paper but not in processing.

for example:

v1 = t(200,200,0);

v2 = r(200,0,);

you can do it with Determinant or just say t = 1 , r = 1 :

{200,200,0} , {200,0,0} place it : Ax^2 + Bx + c = 0;

A200^2 + 200b = 0 => 200A+b = 0;

200^2A = 0; => A = 0;

b = 0;

so the plane will be (0,0,0).

Now how I build visually this plane?

Thank you.

java help

[1 Reply]
- 08-Oct-2010 07:26 AM
- Forum: Programming Questions
Hi,
I have .NullPointerException error. I know whatss mean but I cant dinf any error on my code.

This is the code:
2. class Scroll
3. {
5. float x ;
6. float l ;
7. Scroll()
8. {
9. x = 0;
10. l = x+width;
11. fill(127);
12. stroke(255);
13. rect(0,10,width,20);
14. fill(255);
15. stroke(0);
16. rect(x,11,20,19);
17. }
19. void update()
20. {
21. if(mouseX < x)
22. {
23. l = width - x - mouseX;
24. }
25. else
26. {
27. l = width + x + mouseX;
28. }
29. x = mouseX;
30. print(l);
31. background(0);
33. fill(127);
34. stroke(255);
35. rect(0,10,width,20);
36. fill(255);
37. stroke(0);
38. rect(x,11,20,19);
39. }
40. }
Thank you.

336 error

[5 Replies]
- 03-Oct-2010 01:42 PM
- Forum: Android Processing
Hello,
I just cant find a answer to this error:
2. android-sdk-windows\tools\ant\ant_rules_r3.xml:336: Error running javac.exe compiler
Can any one give me an answer to this problem please?
Thank you.

Arduino problem

[1 Reply]
- 03-Oct-2010 01:36 PM
- Forum: Integration and Hardware
Hello,
I am trying to pass some data from the arduino to the processing.

I am passing 3 values like xxx,yyy and zzz as one long: xxxyyyzzz

This is part of my code:
2. void serialEvent (Serial myPort) {
3. // get the ASCII string:
4. String inString = myPort.readStringUntil('\n');
6. if (inString != null) {
7. grid();
8. stroke(0);
9. line(x,0,x,height);
10. // trim off any whitespace:
11. inString = trim(inString);
12. // convert to an int and map to the screen height:
13. inByte = int(inString);
14. y1 = (inByte/1000000);
15. y2 = inByte/1000-y1*1000;
16. y3 = inByte-y1*1000000-y2*1000;
18. y1 = round(map(y1, 0, 1023, 0, height));
19. y2 = round(map(y2, 0, 1023, 0, height));
20. y3 = round(map(y3, 0, 1023, 0, height));
22. print("x : ");
23. print(y1);
24. print(" |y: ");
25. print(y1);
26. print(" |z: ");
27. println(y3);
The values I am passing is not the values I get..
Whats my problem please?

Thank you.

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