57 lines
1.3 KiB
Plaintext
57 lines
1.3 KiB
Plaintext
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/**
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* Simple Real-Time Slit-Scan Program.
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* By Golan Levin.
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*
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* This demonstration depends on the canvas height being equal
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* to the video capture height. If you would prefer otherwise,
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* consider using the image copy() function rather than the
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* direct pixel-accessing approach I have used here.
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*/
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import processing.video.*;
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Capture video;
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int videoSliceX;
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int drawPositionX;
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void setup() {
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size(600, 240);
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// This the default video input, see the GettingStartedCapture
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// example if it creates an error
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video = new Capture(this,320, 240);
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// Start capturing the images from the camera
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video.start();
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videoSliceX = video.width / 2;
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drawPositionX = width - 1;
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background(0);
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}
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void draw() {
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if (video.available()) {
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video.read();
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video.loadPixels();
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// Copy a column of pixels from the middle of the video
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// To a location moving slowly across the canvas.
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loadPixels();
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for (int y = 0; y < video.height; y++){
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int setPixelIndex = y*width + drawPositionX;
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int getPixelIndex = y*video.width + videoSliceX;
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pixels[setPixelIndex] = video.pixels[getPixelIndex];
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}
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updatePixels();
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drawPositionX--;
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// Wrap the position back to the beginning if necessary.
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if (drawPositionX < 0) {
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drawPositionX = width - 1;
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}
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}
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}
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