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Index › Programming Questions & Help › Other Libraries › Candy SVG library and Array
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Candy SVG library and Array (Read 451 times)
bgustavo
Candy SVG library and Array
Mar 6th, 2008, 3:32pm  
greetings,

i am making a project and i need to use some SVG graphics (78 graphics * 3) the best way i can think of using these to fit my purpose is to create an array and load them all there. to do so, i've made the following array:

SVG[][] letras = new SVG[3][78];

then, in the void setup(){}, i wrote

for(int i = 0; i < 3; i++){
   for (int j = 0; j < 78; j++) {
     letras[i][j] = new SVG(this, "\""+"letra"+i+(j+33)+".svg"+"\"");

in order to load the SVG files called letra#*.svg where # is a number between 0 and 2 and * is a number between 33 and 90 (inclusive).

i get the following error:

"letra033.svg" does not exist or could not be read
java.lang.RuntimeException: java.lang.NullPointerException
at processing.opengl.PGraphicsOpenGL.requestDisplay(PGraphicsOpenGL.java:172)
at processing.core.PApplet.run(PApplet.java:1562)
at java.lang.Thread.run(Thread.java:552)
Caused by: java.lang.NullPointerException
at processing.xml.XMLElement.readChar(XMLElement.java:2517)
at processing.xml.XMLElement.scanWhitespace(XMLElement.java:2199)
at processing.xml.XMLElement.parseFromReader(XMLElement.java:1640)
at processing.xml.XMLElement.parseFromReader(XMLElement.java:1598)
at processing.xml.XMLElement.<init>(XMLElement.java:485)
at processing.candy.SVG.<init>(SVG.java:158)
at Temporary_6596_4593.setup(Temporary_6596_4593.java:63)
at processing.core.PApplet.handleDisplay(PApplet.java:1390)
at processing.opengl.PGraphicsOpenGL$1.display(PGraphicsOpenGL.java:227)
at com.sun.opengl.impl.GLDrawableHelper.display(GLDrawableHelper.java:78)
at javax.media.opengl.GLCanvas$DisplayAction.run(GLCanvas.java:281)
at com.sun.opengl.impl.GLDrawableHelper.invokeGL(GLDrawableHelper.java:194)
at javax.media.opengl.GLCanvas$DisplayOnEventDispatchThreadAction.run(GLCanvas.java
:298)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:179)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:478)
at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:2
34)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:184
)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:178)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:170)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:100)




yet, if i use this:

SVG a33;
a33 = new SVG(this, "letra033.svg");

i get no error.

how can i load the svg files to the array i described above?

or is it possible to load all the SVG files one by one like the second method i used and then link the position in the array to the file loaded?
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eskimoblood
Re: Candy SVG library and Array
Reply #1 - Mar 6th, 2008, 5:32pm  
"\""+"letra"+i+(j+33)+".svg"+"\"" will give you this String "letra033.svg" but you need  the String letra033.svg without the "". So your string construction should look like this: "letra"+i+(j+33)+".svg"
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Andreas Köberle {eskimoblood}
222550793  
bgustavo
Re: Candy SVG library and Array
Reply #2 - Mar 6th, 2008, 11:44pm  
thanks for the quick reply.
since in the example we put the filename in "" i thought we needed to pass the filename with "" also as in the normal method.
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jorgecardoso
Re: Candy SVG library and Array
Reply #3 - Mar 7th, 2008, 8:19pm  
The "" are just the way to tell Processing that the literal value we are writing is to be interpreted as a String, rather than some other type.

The real contents of a String don't include (generally) the "".

You would only use \" if you really want the String contents to have the " symbol. In your case the filename must not have a " symbol so you can't put one in it.

jorge
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jc&&&&--&&http://jorgecardoso.eu&&http://livromidp.jorgecardoso.eu
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bgustavo
Re: Candy SVG library and Array
Reply #4 - Mar 8th, 2008, 12:43am  
Wink
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