testImageRotate.pde

PImage myImage;

void setup()
{
  size(500,500);
  myImage = loadImage("test.png");
}

void draw()
{
  background(255);
  float speedOfRotation = .01; // higher values go faster, e.g. .02 is double speed
  float amtToRotate = millis()*speedOfRotation;
  
  int x = 100, y = 100;  // where to place the image
  
  pushMatrix();
  translate(x,y);
  rotate(amtToRotate);
  image(myImage, -myImage.width/2, -myImage.height/2);
  popMatrix();
}