- Processing
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- Processing.py
- Processing for Android
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- Processing Foundation

This reference is for Processing 3.0+. If you have a previous version, use the reference included with your software in the Help menu. If you see any errors or have suggestions, please let us know. If you prefer a more technical reference, visit the Processing Core Javadoc and Libraries Javadoc.

Name | ### redraw()
Examples |
    float x = 0;

    void setup() {
      size(200, 200);
      noLoop();
    }

    void draw() {
      background(204);
      line(x, 0, x, height);
    }

    void mousePressed() {
      x += 1;
      redraw();
    }
Description | Executes the code within draw() one time. This functions allows the program to update the display window only when necessary, for example when an event registered by mousePressed() or keyPressed() occurs. In structuring a program, it only makes sense to call redraw() within events such as mousePressed(). This is because redraw() does not run draw() immediately (it only sets a flag that indicates an update is needed). The redraw() function does not work properly when called inside draw(). To enable/disable animations, use loop() and noLoop().
Syntax |
    redraw()
Returns | void
Related | draw() loop() noLoop() frameRate()

Updated on July 4, 2018 11:56:41am EDT