Processing Forum

Problem with changing the color of a custom shape (line) in P3D

[2 Replies]
- 14-May-2013 06:52 PM
- Forum: Programming Questions
At the moment, I am attempting to change the color of a custom shape.

stroke(3);

fill(255, 0, 0);

beginShape();

vertex(x, y, z);

vertex(a, b, c);

endShape();

However, this doesn't change the line to red or change the stroke of the line at all. A black line is drawn instead. The code above is within a for loop within a pushMatrix() popMatrix() block, but the fill in that scope is not black and works as desired.

What would be causing the lack of color/stroke change and what is the solution?

Edit: Now that I look at it more, any stroke isn't changing the width in the program wider than what looks like 1 unit.

Odd Drawing Problem in P3D

[2 Replies]
- 14-May-2013 02:01 PM
- Forum: Programming Questions
I have created an object called a "Block."

It has a function called update that draws it.

public void update(float xTrans, float yTrans, float zTrans, float rotateX, float rotateY, int[] rgb) {

translate(xTrans, yTrans, zTrans);

scale(30);;

rotateX(rotateX);

rotateY(rotateY);

fill(rgb[0], rgb[1], rgb[2]);

stroke(2);

box(1);

}

This works great when I call it once.

When a call it again, with different parameters for a different cube (let's say, 50px to the right of the first block and 50px up of the first block), only the first cube is drawn.

When I draw the second cube alone, without drawing the first, it is drawn no problem.

What might be causing this issue and what would a solution be?

How to import a library when you have the jar? - Mongodb and Processing

[6 Replies]
- 10-May-2013 09:41 AM
- Forum: Contributed Library Questions
The only thread I've found on using Mongodb and Processing is here: https://forum.processing.org/topic/mongo-db-and-processing.

The OP asks if it's possible to use both together, and it is. However, the thread stops there.

Has anyone gotten this working? If so, how?

Mongodb is installed properly on my machine. I can get a local database up and running and connect to it through the command window. However, when I try to import the Mongodb Java driver into Processing, it tells me that the library does not exist. I have the jar in the same folder. I've also tried including the src in the same folder (the src is far too convoluted to be imported properly and used as adjacent Java classes along with the PDEs).

Do I have to recompile the src as a Processing library? How can I import the Mongodb Java library when I have the jar?

Thank you!

Eclipse Processing Library Error on Compilation

[3 Replies]
- 21-Apr-2013 12:19 PM
- Forum: Library and Tool Development
When compiling the Processing JSON library (found here: https://github.com/agoransson/JSON-processing), I receive the following error.

BUILD FAILED

/home/glchriste/workspace/JSON-Processing/JSON-processing-master/resources/build.xml:95: The following error occurred while executing this line:

/home/glchriste/workspace/JSON-Processing/JSON-processing-master/resources/build.xml:119: /home/glchriste/workspace/JSON-Processing/JSON-processing-master/${classpath.libraries.location} does not exist.

Total time: 2 seconds

I'm wondering what exactly is causing this? It's not clear to me what classpath.libraries.location is or why it's not being found.

OutOfMemoryError

[3 Replies]
- 15-Jan-2013 08:17 PM
- Forum: Contributed Library Questions
Quick question! I have tweaked Neil Wallis's Java water simulation to work with input from a WebCam. However, after a few seconds, an OutOfMemoryError occurs. I have tried calling the garbage collector with System.gc(), but it ultimately still crashes. Is there any other way to handle this error? I would love to get this code working.

Code is as follows. To get it to work yourself, you need the gsvideo processing library. You can find it here. http://gsvideo.sourceforge.net/
1. import java.io.*; // for the loadPatternFilenames() function
2. import codeanticode.gsvideo.*; // the GSVideo library
4. GSCapture cam;
6. PImage img;
8. int size;
9. int hwidth,hheight;
10. int riprad;
12. int ripplemap[];
13. int ripple[];
14. int texture[];
16. int oldind,newind, mapind;
18. int i,a,b;
20. int frameCount;
22. void setup(){
23. img = loadImage("background.jpg");
25. frameCount = 0;
26. //width = img.width;
27. //height = img.height;
28. //size(width, height);
29. size(1280, 720);
30. frameRate(40);
32. cam = new GSCapture(this, 1280, 720);
33. cam.start();
34. noStroke();
36. hwidth = width>>1;
37. hheight = height>>1;
38. riprad=5; //test with 3
40. size = width * (height+2) * 2;
42. ripplemap = new int[size];
43. ripple = new int[width*height];
44. texture = new int[width*height];
46. oldind = width;
47. newind = width * (height+3);
49. image(img, 0, 0);
50. loadPixels();
52. smooth();
53. }
55. void draw() {
56. //System.gc();
58. //Camera
60. //Get input from the camera.
61. if (cam.available())
62. cam.read();
64. img = cam.get();
65. //Water Ripples
66. image(img, 0, 0);
68. loadPixels();
69. texture = pixels;
71. newframe();
73. for (int i = 0; i < pixels.length; i++) {
74. pixels[i] = ripple[i];
75. }
77. updatePixels();
78. frameCount++;
80. if(frameCount%120==0) {
81. System.gc();
82. }
83. }
85. public void disturb(int dx, int dy) {
86. //System.gc();
87. for (int j=dy-riprad;j<dy+riprad;j++) {
88. for (int k=dx-riprad;k<dx+riprad;k++) {
89. if (j>=0 && j<height && k>=0 && k<width) {
90. ripplemap[oldind+(j*width)+k] += 128; //test with 512
91. }
92. }
93. }
94. }
96. void newframe() {
97. //Toggle maps each frame
98. i=oldind;
99. oldind=newind;
100. newind=i;
102. i=0;
103. mapind=oldind;
104. for (int y=0;y<height;y++) {
105. for (int x=0;x<width;x++) {
106. short data = (short)((ripplemap[mapind-width]+ripplemap[mapind+width]+ripplemap[mapind-1]+ripplemap[mapind+1])>>1);
107. data -= ripplemap[newind+i];
108. data -= data >> 5;
109. ripplemap[newind+i]=data;
111. //where data=0 then still, where data>0 then wave
112. data = (short)(1024-data);
114. //offsets
115. a=((x-hwidth)*data/1024)+hwidth;
116. b=((y-hheight)*data/1024)+hheight;
118. //bounds check
119. if (a>=width) a=width-1;
120. if (a<0) a=0;
121. if (b>=height) b=height-1;
122. if (b<0) b=0;
124. ripple[i]=texture[a+(b*width)];
125. mapind++;
126. i++;
127. }
128. }
129. }
131. //Mouse functions
132. void mouseDragged()
133. {
134. //disturb(mouseX, mouseY);
135. }
137. void mouseMoved()
138. {
139. disturb(mouseX, mouseY);
140. }
142. void mouseReleased()
143. {
144. }

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