​

function preload() {

  theShader = loadShader('shaderTest.vert', 'shaderTest.frag');

}

​

function setup() {

  pixelDensity(1);

  createCanvas(400, 400, WEBGL);

  noStroke();

}

​

function draw() {

​

  shader(theShader);

  theShader.setUniform("u_resolution", [width, height]);

  theShader.setUniform("u_time", millis() / 1000.0);

  theShader.setUniform("u_mouse", [mouseX, map(mouseY, 0, height, height, 0)]);

  fill(100);

  rect(0, 0, width, height);

}

​

function windowResized(){

  resizeCanvas(windowWidth, windowHeight);

}

​