Processing Forum

A keyboard data entry routine

[2 Replies]
- 21-Nov-2011 09:30 PM
- Forum: Programming Questions
Hi guys;

I am trying to do a routine to use a keyboard as a data entry like : enter a file name or enter a string. So for, my code work until I don't know how to use the data inside my array to make a string. A string is a array of char, and I use the CR - Enter key - ASCII code 10 or 0x0A to control my program.

I want this : char mydataset[i] ----> String myword so I can use the string variable later to use as a file name by example or use print(myword) or text(myword,30,30) in my program.

Any help would be nice.

My code work except I use a for() loop to print(mydataset[i]) and I don't know to make my array of char into a string. And I use a state variable to control my program. I don't want something like : ttttttttttttttttttttttt

The code do is : show the key and ASCII code, the number of key typed, display in the console the key typed ( an echo ) and print the array. But no string yet.

Here my code :
1. char data;
2. char[] mydataset = new char[255];
3. int ascii;
4. int count;
5. int total;
6. int state;
7. String myword;
8. void setup()
9. {
11. size(100,100);
12. data=0;
13. count=0;
14. ascii=0;
15. total=0;
16. state=0;
17. }
18. void draw()
19. {
20. background(255);
21. fill(0);
22. ascii=int(data);
23. text(data+" : "+ascii,20,20);
24. if (data==10 && state==1)
25. {
26. for (int i=0;i<total+1;i++)
27. {
28. print(mydataset[i]);
29. }
30. total=0;
31. state=0;
32. }
33. text("count : "+count,30,90);
34. }
35. void keyTyped()
36. {
37. data=key;
38. mydataset[count]=data;
39. print(data);
40. if (data==10)
41. {
42. total=count;
43. count=0;
44. state=1;
45. }
46. else
47. {
48. count++;
49. }
50. }

I have a mystery in my code here

[6 Replies]
- 16-Nov-2011 09:29 PM
- Forum: Programming Questions
Hi guys;

I was just doing fiction solar system, the code did OK until the last new object in my code. For example : body_b.cx=body_a.x but when I did a println() the variable, the data is simply NOT equal... What the ???

Can somebody explain why the data ( romulus.x and moon_b.cx ) don't match ?

Go ahead, try it... the last object draw is going across the sceen instead of orbiting.

PS: I am sorry that sound like a re-post.

Here the results:

output.println(imaginary_point.x+" "+romulus.x+" "+moon_b.cx+" "+moon_a.x+" "+moon_b.x);

799.95435 769.9726 506.2827 794.93835 481.31696
799.81726 769.8903 512.5625 794.75336 487.69946
799.58887 769.75323 518.8367 794.44543 494.14447
799.2692 769.56116 525.1021 794.01483 500.64844
798.8584 769.31415 531.3562 793.4623 507.20807
798.35657 769.01215 537.5959 792.7886 513.81946
797.76385 768.65497 543.8184 791.9945 520.4789
797.08044 768.2426 550.02106 791.08124 527.18243
796.3065 767.77484 556.20087 790.05 533.9257
795.4423 767.2515 562.3551 788.90216 540.70447
794.48816 766.67267 568.4809 787.6394 547.51416
793.4443 766.0379 574.5756 786.2633 554.3502
792.31104 765.3472 580.6365 784.7759 561.2078
791.08875 764.60034 586.66077 783.17896 568.08215
789.7777 763.79694 592.64575 781.4746 574.9681
788.37854 762.9371 598.5888 779.66534 581.86053
786.8914 762.02026 604.48737 777.7533 588.75433
785.31696 761.04645 610.3386 775.7411 595.644
783.6556 760.01526 616.14026 773.6312 602.5243
781.9078 758.92645 621.88965 771.42645 609.38965
780.0741 757.7797 627.5843 769.1295 616.2345
778.15515 756.57495 633.2217 766.74335 623.0533
776.1515 755.31177 638.79956 764.271 629.84033
774.06366 753.98975 644.3153 761.71515 636.5899
771.89233 752.6087 649.7668 759.07916 643.2963
769.6382 751.16833 655.1517 756.36615 649.95386
767.302 749.66846 660.46765 753.57935 656.55676
764.8843 748.10846 665.7125 750.7217 663.0993
762.3859 746.48834 670.88434 747.79675 669.5759

Here my code:
1. PrintWriter output;
2. Body sun_a;
3. Body sun_b;
4. Body planet_a;
5. Body imaginary_point;
6. Body remus;
7. Body romulus;
8. Body moon_a;
9. Body moon_b;
11. void setup()
12. {
13. size(1000,1000);
14. frameRate(30);
15. ellipseMode(CENTER);
16. output = createWriter("result.txt");
17. sun_a=new Body(width/2,height/2,50,50,1,1);
18. sun_b=new Body(width/2,height/2,50,50,1,1);
19. planet_a=new Body(width/2,height/2,150,10,2,-1);
20. imaginary_point=new Body(width/2,height/2,300,1,1,1);
21. remus=new Body(width/2,height/2,30,20,2,-1);
22. romulus=new Body(width/2,height/2,30,20,2,-1);
23. moon_a=new Body(width/2,height/2,25,8,3,1);
24. moon_b=new Body(width/2,height/2,25,8,3,1);
25. }
26. void draw()
27. {
28. background(255);
29. sun_a.domove();
30. sun_a.render();
31. sun_b.domove();
32. sun_b.x=sun_b.cx+(sun_b.cx-sun_b.x);
33. sun_b.y=sun_b.cy+(sun_b.cy-sun_b.y);
34. sun_b.render();
35. planet_a.domove();
36. planet_a.render();
37. imaginary_point.domove();
38. remus.cx=imaginary_point.x;
39. remus.cy=imaginary_point.y;
40. remus.domove();
41. remus.render();
42. romulus.cx=imaginary_point.x;
43. romulus.cy=imaginary_point.y;
44. romulus.domove();
45. romulus.x=romulus.cx+(romulus.cx-romulus.x);
46. romulus.y=romulus.cy+(romulus.cy-romulus.y);
47. romulus.render();
48. moon_a.cx=romulus.x;
49. moon_a.cy=romulus.y;
50. moon_a.domove();
51. moon_a.render();
52. // That next parts is not working
53. moon_b.cx=romulus.x;
54. moon_b.cx=romulus.y;
55. moon_b.domove();
56. moon_b.x=moon_b.cx+(moon_b.cx-moon_b.x);
57. moon_b.y=moon_b.cy+(moon_b.cy-moon_b.y);
58. moon_b.render();
59. // notice moon_b.cx and romulus.x have to be equal but THEY ARE NOT - see results
60. output.println(imaginary_point.x+" "+romulus.x+" "+moon_b.cx+" "+moon_a.x+" "+moon_b.x);
61. }
62. void keyPressed()
63. {
64. output.flush(); // Writes the remaining data to the file
65. output.close(); // Finishes the file
66. exit(); // Stops the program
67. }
68. // The class came from jbum, I modify to add a direction
69. class Body
  {
70. float cx,cy,diam;
71. float orad;
72. float orbitSpeed;
73. float ang;
74. float x,y;
76. int direction;
78. Body(float _cx, float _cy, float _orad, float _diam, float _orbitSpeed, int _direction)
79. {
80. cx = _cx; cy = _cy;
81. diam = _diam;
82. orad = _orad;
83. x = 0; y = 0;
84. ang = 0;
85. orbitSpeed = _orbitSpeed;
86. direction = _direction;
87. }
89. void render()
90. {
91. ellipse(x,y,diam,diam);
92. }
94. void domove()
95. {
96. if (direction==1)
97. {
98. ang += radians(orbitSpeed);
99. }
100. if (direction==-1)
101. {
102. ang-= radians(orbitSpeed);
103. }
104. x = cx + cos(ang)*orad;
105.     y = cy + sin(ang)*orad;
106. }
107. }

Orbit fast and orbit slow...

[11 Replies]
- 13-Nov-2011 09:12 PM
- Forum: Programming Questions
Hi guys;

I am trying to do a program to simulate an ordit of a planet around a sun. My code work, but why it going slow and sudden speed-up ( reach near the top of the orbit ) and slow and speed-up ( reach near the bottom of the orbit ) and slow.....and repeat. The debug show me no problem in the calculation and the co-ordinates values to draw the orbit. Slow and Fast ... ? <-- I wonder why ? My computer is a 3 GHz Pentium Dual-Core... 1 GB Ram... humm ?

Anybody have any idea ?

The formula I use is from a math book and it is the circle formula. I use a 4 quadrant system ( use a switch() - case ) to figure out which quadrant my orbit is, so I simply count 0 to 50 and 50 to 0 and the quadrant is the state.

Here my code :
1. int x;
  int y;
  int r; // the radius of the orbit
  int xtemp; // the x and y to draw the planet on the screen
  int ytemp;
  float corx; // a float x
2. int state; // 4 state = 4 quadrant - think the x axis ( +/- ) and y axis ( +/- )
3. void setup()
  {
  size(400,400);
4. // init value
  r=50;
  y=0;
  xtemp=250;
  ytemp=200;
  state=1;
  }
5. void draw()
  {
  // The println is for debug
  println(xtemp+" "+ytemp+" "+x+" "+y);
  background(255);
  // draw a sun
  ellipse(200,200,50,50);
  // draw and calculate the planet position
  incircle();
  ellipse(xtemp,ytemp,5,5);
  
  }
6. // calculate the orbit position
  void incircle()
  {
  corx=sqrt(sq(r)-sq(y));
  x=(int)corx;
7.     // in which quadrant is the planet is
      switch(state)
      {
      case 1 :
8.         // x+ y+
           plusplus();
           break;
      case 2 :
9.          // x- y+
           negplus();
           break;
      case 3 :
10.          // x- y-
           negneg();
           break;
      case 4 :
11.         // x+ y-
           plusneg();
           break;
      }
  }
12. void plusplus()
  {
        ytemp=200+y;
        xtemp=200+x;
        y++;
        if (y==51)
        {
          state=2;
          y=49;
        }
  }
  void negplus()
  {
        ytemp=200+y;
        xtemp=200-x;
        y--;
        if (y==-1)
        {
          state=3;
          y=1;
        }
  }
  void negneg()
  {
       ytemp=200-y;
       xtemp=200-x;
       y++;
       if (y==51)
       {
         state=4;
         y=49;
       }
  }
  void plusneg()
  {
     ytemp=200-y;
     xtemp=200+x;
     y--;
     if (y==-1)
     {
       state=1;
       y=1;
     }
  }

A Clock program in Processing ( Analog & Digital )

[2 Replies]
- 10-Nov-2011 08:41 PM
- Forum: Share your Work
Hi guys;

I just finish a clock program. It show a digital and a analog clock. It use the time from your system and show the time in digital format ( 24 Hr ) and an analog format. I am new at Processing ( since mid-October 2011 ) I was trying to learn Processing and try something cool. I realize learning Processing required a lot of math, geometry, and programing. I am not a student, I am just an hobbyist ( electronics & computer ), I did programing before ( BASIC, Pascal, C, C++ , some assembly ), recently, Java and Java ME <-- for my cell phone ... I did 2 pratical program so far. And Processing. <-- I was "forced" to learn it because I was trying to send a file from my PC to my Arduino, and Procesing was the most easiest to use for that purpose. ( I still need a keyboard routine in Processing like a cin function or scanf() function )

Here my code and tell me of what you guys thinks...
1. /* A analog and digital clock display
2. by Serge J Desjardins aka techone / tech37
3. Toronto, Ontario Canada
4. */
5. PFont roman; // Analog Clock Font
6. PFont hightech; // Digital Clock Font
7. // list of variables
8. int lex=600; // the display size x,y
9. int ley=600;
10. // Needles Co-ordinates
11. int xsec;
12. int ysec;
13. int xmin;
14. int ymin;
15. int xhr;
16. int yhr;
17. int xst;
18. int yst;
19. // Time variable
20. int sec;
21. int mini;
22. int hr;
23. int twentyfour;
24. // Needle size
25. int distancesec=150;
26. int distancemin=100;
27. int distancehr=50;
29. void setup()
30. {
31. // init the program
32. size(lex,ley);
33. smooth();
34. // select the font file.
35. // It came from Tools --> Create Fonts
36. roman = loadFont("ImprintMT-Shadow-48.vlw");
37. hightech = loadFont("LCD5x8H-48.vlw");
38. // Calculate the centre point of the analog clock
39. xst=lex/2;
40. yst=(ley/2)+50;
41. // time extract from your computer
42. sec=second();
43. mini=minute();
44. hr=hour();
45. twentyfour=hr;
46. if (hr>11)
47. {
48. hr=hr-12;
49. }
50. // the co-ordinate calculation routine
51. thehand();
52. }
53. void draw()
54. {
55. background(255);
56. //draw the big circles
57. fill(255);
58. strokeWeight(2);
59. stroke(18,90,12);
60. ellipse(xst,yst,(distancesec+50)*2,(distancesec+50)*2);
61. fill(255);
62. strokeWeight(2);
63. stroke(18,90,12);
64. ellipse(xst,yst,(distancesec+10)*2,(distancesec+10)*2);
65. // display the Romans numbers
66. textFont(roman,25);
67. fill(0);
68. textAlign(CENTER);
69. text("XII",xst,(yst-(distancesec+20)));
70. fill(0);
71. textAlign(CENTER);
72. text("VI",xst,(yst+(distancesec+37)));
73. fill(0);
74. textAlign(CENTER);
75. text("III",(xst+(distancesec+32)),yst);
76. fill(0);
77. textAlign(CENTER);
78. text("IX",(xst-(distancesec+28)),yst);
79. //draw the needles ( Hour, Minute, Second )
80. strokeWeight(4);
81. stroke(0,0,255);
82. line(xst,yst,xmin,ymin);
83. strokeWeight(6);
84. stroke(0,255,0);
85. line(xst,yst,xhr,yhr);
86. strokeWeight(2);
87. stroke(0,0,0);
88. line(xst,yst,xsec,ysec);
89. // a centre dot
90. fill(255,0,0);
91. noStroke();
92. ellipse(xst,yst,10,10);
93. // digital box
94. fill(255);
95. strokeWeight(4);
96. stroke(0,69,162);
97. quad(100,20,500,20,500,120,100,120);
98. // the four dot inside the digital box
99. // That code portion came from Strawberry15
100. // is multi dot/circles program. A modify version
101. for (int x1 = 233; x1 < 400; x1 = x1+133)
102. {
103. for (int y1 = 55; y1 < 100; y1 = y1+30)
104. {
105. fill(255,145,0);
106. noStroke();
107. ellipse(x1,y1,20,20);
108. }
109. }
110. // the high tech digital display
111. textFont(hightech,75);
112. fill(0);
113. textAlign(CENTER);
114. text(sec,440,98);
115. fill(0);
116. textAlign(CENTER);
117. text(mini,305,98);
118. fill(0);
119. textAlign(CENTER);
120. text(twentyfour,168,98);
121. // the counter ( second, minute, hour )
122. // to be use for the co-ordinate calculation
123. sec++;
124. if (sec==60)
125. {
126. sec=0;
127. mini++;
128. if (mini==60)
129. {
130. mini=0;
131. hr++;
132. twentyfour++;
133. if (twentyfour==24)
134. {
135. twentyfour=0;
136. }
137. if (hr==12)
138. {
139. hr=0;
140. }
141. }
143. }
144. // the co-ordinate calculation
145. thehand();
146. // the 1 second delay
147. delay(1000);
149. }
150. // the co-ordinate calculation routine
151. void thehand()
152. {
153. // the routine variable
154. float xtemp;
155. float ytemp;
156. int anglesec;
157. int anglemin;
158. int anglehr;
159. // find the angle in degree
160. anglesec=(sec*6)+270;
161. anglemin=(mini*6)+270;
162. anglehr=(hr*30)+270;
163. // calculate the x - y co-ordinate
164. // to display the needles
165. xtemp=distancesec*cos(radians(anglesec));
166. ytemp=distancesec*sin(radians(anglesec));
167. xsec=(int)(xst+xtemp);
168. ysec=(int)(yst+ytemp);
169. xtemp=distancemin*cos(radians(anglemin));
170. ytemp=distancemin*sin(radians(anglemin));
171. xmin=(int)(xst+xtemp);
172. ymin=(int)(yst+ytemp);
173. xtemp=distancehr*cos(radians(anglehr));
174. ytemp=distancehr*sin(radians(anglehr));
175. xhr=(int)(xst+xtemp);
176. yhr=(int)(yst+ytemp);
177. }

Error message about serial library version

[5 Replies]
- 02-Nov-2011 07:35 AM
- Forum: Core Library Questions
I am trying to send a file through a serial port. ( to an Arduino ) It work ( sort of ) <-- RX light up..

But I received this message. Even there is nothing connecting to the serial port. COM1

Here the "error" message.

WARNING : RXTX Version mismatch

                   Jar version = RXTX-2.2pre1

                   native lib Version = RXTX-2.2pre2

What is it ? And what I can do to correct it ? Program work fine. Except that error message.

Here my code :   I modify the example code of loadBytes()
1. import processing.serial.*;
2. Serial myport;
3. void setup()
4. {
5. println(Serial.list());
  myport = new Serial(this,Serial.list()[3], 9600); // My Arduino is COM7
6. // change the line --> myport = new Serial(this,Serial.list()[0],9600); // for COM1
7. // open a file and read its binary data
  byte b[] = loadBytes("curconv.rms");
  
  int sz=b.length;
  println("The size of the file is : "+sz+"\n");
  // print each value, from 0 to 255
  for (int i = 0; i < b.length; i++)
  {
  // every tenth number, start a new line
  if ((i % 16) == 0) {
      println();
  }
  
  // bytes are from -128 to 127, this converts to 0 to 255
     int a = b[i] & 0xff;
     print(hex(a,2) + " ");
     myport.write(a);
  
  }
  // print a blank line at the end
  println();
8. }

Activity Trend