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Cannot find a class or type named "File"

[1 Reply]
- 14-Jan-2013 11:19 AM
- Forum: Programming Questions
Hi,

I am a pretty new with processing and I am trying to run this code below...

It is code from a book which certainly a lot of you know (Generative Design).
...and is supposed to load images from a folder and visualise these images...

Obviously there is a problem with selecting the folder..but I have no clue how to change that...

Happy for any advice. I tried already to change the link in the folder, but I couldn`t access it...

I always get the same error message:

Cannot find a class or type named "File"

I highlighted the line in the code in red below.

Thank you very much

// P_4_3_1_02.pde

//

// Generative Gestaltung, ISBN: 978-3-87439-759-9

// First Edition, Hermann Schmidt, Mainz, 2009

// Hartmut Bohnacker, Benedikt Gross, Julia Laub, Claudius Lazzeroni

// Copyright 2009 Hartmut Bohnacker, Benedikt Gross, Julia Laub, Claudius Lazzeroni

//

// http://www.generative-gestaltung.de

//

// Licensed under the Apache License, Version 2.0 (the "License");

// you may not use this file except in compliance with the License.

// You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0

// Unless required by applicable law or agreed to in writing, software

// distributed under the License is distributed on an "AS IS" BASIS,

// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

// See the License for the specific language governing permissions and

// limitations under the License.

/**

* pixel mapping. each pixel is translated into a new element (svg file).

* take care to sort the svg file according to their greyscale value.

* see also "_4_3_1_02_analyse_svg_grayscale.pde"

*

* KEYS

* s : save png

* p : save pdf

*/

import processing.pdf.*;

boolean savePDF = false;

PShape[] shapes;

int shapeCount = 0;

PImage img;

void setup() {

size(600, 900);

smooth();

img = loadImage("pic.png");

println(img.width+" x "+img.height);

// ------ load shapes ------

// replace this location with a folder on your machine or use selectFolder()

//File dir = new File(selectFolder("choose a folder with svg files ..."));

File dir = new File(sketchPath,"data");

if (dir.isDirectory()) {

String[] contents = dir.list();

shapes = new PShape[contents.length];

for (int i = 0 ; i < contents.length; i++) {

// skip hidden files and folders starting with a dot, load .svg files only

if (contents[i].charAt(0) == '.') continue;

else if (contents[i].toLowerCase().endsWith(".svg")) {

File childFile = new File(dir, contents[i]);

println(childFile.getPath());

shapes[shapeCount] = loadShape(childFile.getPath());

shapeCount++;

}

}

}

println(shapeCount);

}

void draw() {

if (savePDF) beginRecord(PDF, timestamp()+".pdf");

background(255);

float mouseXFactor = map(mouseX, 0,width, 0.05,1);

float mouseYFactor = map(mouseY, 0,height, 0.05,1);

for (int gridX = 0; gridX < img.width; gridX++) {

for (int gridY = 0; gridY < img.height; gridY++) {

// grid position + tile size

float tileWidth = width / (float)img.width;

float tileHeight = height / (float)img.height;

float posX = tileWidth*gridX;

float posY = tileHeight*gridY;

// get current color

color c = img.pixels[gridY*img.width+gridX];

// greyscale conversion

int greyscale = round(red(c)*0.222+green(c)*0.707+blue(c)*0.071);

int gradientToIndex = round(map(greyscale, 0,255, 0,shapeCount-1));

shape(shapes[gradientToIndex], posX,posY, tileWidth,tileHeight);

}

}

if (savePDF) {

savePDF = false;

endRecord();

}

}

void keyReleased() {

if (key == 's' || key == 'S') saveFrame(timestamp()+"_##.png");

if (key == 'p' || key == 'P') savePDF = true;

}

// timestamp

String timestamp() {

Calendar now = Calendar.getInstance();

return String.format("%1$ty%1$tm%1$td_%1$tH%1$tM%1$tS", now);

}

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