mirror of
https://github.com/processing/processing4.git
synced 2026-01-30 03:41:15 +01:00
71 lines
1.4 KiB
Plaintext
71 lines
1.4 KiB
Plaintext
/**
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* Zoom.
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*
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* Move the cursor over the image to alter its position. Click and press
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* the mouse to zoom. This program displays a series of lines with their
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* heights corresponding to a color value read from an image.
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*/
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// The next line is needed if running in JavaScript Mode with Processing.js
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/* @pjs preload="ystone08.jpg"; */
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PImage img;
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int[][] imgPixels;
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float sval = 1.0;
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float nmx, nmy;
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int res = 5;
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void setup() {
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size(640, 360, P3D);
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noFill();
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stroke(255);
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img = loadImage("ystone08.jpg");
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imgPixels = new int[img.width][img.height];
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for (int i = 0; i < img.height; i++) {
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for (int j = 0; j < img.width; j++) {
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imgPixels[j][i] = img.get(j, i);
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}
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}
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}
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void draw() {
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background(0);
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nmx += (mouseX-nmx)/20;
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nmy += (mouseY-nmy)/20;
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if(mousePressed) {
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sval += 0.005;
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}
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else {
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sval -= 0.01;
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}
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sval = constrain(sval, 1.0, 2.0);
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translate(width/2 + nmx * sval-100, height/2 + nmy*sval - 100, -50);
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scale(sval);
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rotateZ(PI/9 - sval + 1.0);
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rotateX(PI/sval/8 - 0.125);
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rotateY(sval/8 - 0.125);
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translate(-width/2, -height/2, 0);
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for (int i = 0; i < img.height; i += res) {
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for (int j = 0; j < img.width; j += res) {
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float rr = red(imgPixels[j][i]);
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float gg = green(imgPixels[j][i]);
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float bb = blue(imgPixels[j][i]);
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float tt = rr+gg+bb;
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stroke(rr, gg, gg);
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line(i, j, tt/10-20, i, j, tt/10 );
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}
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}
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}
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