Processing 1.0 - Processing Discourse - ERROR: Type not found !

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ERROR: Type not found ! (Read 689 times)

gvilera

ERROR: Type not found !
Apr 12^th, 2007, 2:04am

Hi,

my name is Gustavo, I have been programming with Processing since 6 very exiting Month & I have, until now, always been able to correct any kind of semantic ERROR.

I´ve created as always one class, named Waltzen, and it doesn´t seems to be acknowledged within the temporary files... hier the code. (A part of it)

PImage b;
int num = 3;
Waltzen[] waltzen = new Waltzen[num];
float [] vel= new float [num];
float acc=0;

void setup(){
b = loadImage("w.jpg");
size(400,1000);
smooth();
}

//initializierung der Geschwindichkeiten auf vel=0, ypos auf 0
for(int i=0; i=num;i++ ){
waltzen[i].vel=0;
waltzen[i].ypos=0;
}

void draw(){
ypos();

for(int i=0; i=num;i++){
waltzen[i].vel -= acc;
}
}

//*** hier is the class***//

class Waltzen{
float vel;
float xpos, ypos;

Waltzen(PImage b){
image(b, this.xpos, this.ypos);
}
}

Thank you very much in forwards, I hope you may help me find the reason why it always apears this info at my editor:

tmp/build35349.tmp/Temporary_2334_7933.java:3:2:3:8: Semantic Error: Type "Waltzen" was not found.

Gustavo Vilera

eskimoblood

Re: ERROR: Type not found !
Reply #1 - Apr 12^th, 2007, 9:26am

Hi, there are some errors in your code. First the part:
Code:


 //initializierung der Geschwindichkeiten auf vel=0, ypos auf 0
for(int i=0; i=num;i++ ){
  waltzen[i].vel=0;
  waltzen[i].ypos=0;
}

stands outside any method, this part should be put in the setup statement.

Second one: you call a the ypos() method in the draw function, but this method doesn't exists.

Also the way you use the for loop is a little bit unusual. Your num variable is 3. I think you would have 3 waltzen objects. But you will get 4 (0,1,2,3). So this part: i=num should look like: i<num.

In your class an image should drawn at the screen at the initialization. But the two coordinates are not overload.
I think you look for something like this:
Code:


class Waltzen{
  float xpos, ypos, vel;
  PImage img;
//initialize the Object and overload an image a the position
//waltzen[i]=new Waltzen(x,y,image)
  Waltzen(float i_xpos, float i_ypos, PImage i_img){
   xpos=i_xpos;
   ypos=i_xpos;
   img=i_img;
  }

//call waltzen[i].draw() will draw the image to the screen
  void draw(){
    image(img, xpos, ypos);
  }

At last you not need call this in a class to use its variables.

Andreas Köberle {eskimoblood}

gvilera YaBB Newbies Offline Posts: 6 Germany	Re: ERROR: Type not found ! Reply #2 - Apr 12^th, 2007, 8:58pm Thanks a Lot !! I realized Yesterday about the Errors in the FOR block, but I never came to the idea of putting a draw funtion in the Class. I now understand what the mistake was. Only one more question, why it is that the same void draw in the class doesn´t repeats in a Loop?

fjen God Member Offline Posts: 965	Re: ERROR: Type not found ! Reply #3 - Apr 12^th, 2007, 9:16pm just because they are contained in a class. only functions on the local / global level of your sketch will be called by default.

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