Project 06 – Abstract Clock – srauch

//Sam Rauch, section B, srauch@andrew.cmu.edu, project 06: abstract clock
//this code creates a beach with a tide. High tide is at noon, and low tide is at midnight.
//the grass rustles in the sea breeze. it gets darker from 7pm 8 pm and lighter from 6 to 7am. 

var grasslength = []; //length of blades of grass
var sandspotX = []; //x position of specks in sand
var sandspotY = []; //y position of specks in sand
var waveY; //height of the tide
var waveShift; //amount the water's edge fluctuates by 
var daytime; //the time of day in minutes
var darkness; //amount of darkness it is

function setup() {
    createCanvas(400, 400);
    background(220);
    text("p5.js vers 0.9.0 test.", 10, 15);

    //initializing x position of specks in sand
    for (var i = 0; i < 50; i++){
        sandspotX[i] = random(0, width);
    }

    //initializing y position of specks in sand
    for (var i = 0; i < 50; i++){
        sandspotY[i] = random(200, 400);
    }

    frameRate(5);

    //creating y position of tide. High tide is at noon, low tide is at midnight
    daytime = hour()*60 + minute(); //time of day, in minutes
    if (daytime < 690) { //if before noon
        waveY = map(daytime, 0, 690, 400, 200); //before noon, wave gets higher with time
    } else { //if after noon
        waveY = map(daytime, 690, 1380, 200, 400); //after noon, wave gets lower with time
    }

    //making it get lighter and darker at sunrise and sunset
    if (daytime >= 300 & daytime < 360) { //if from 5 to 6 am, it gets lighter
        darkness = map(daytime, 300, 360, 120, 0);
    } else if (daytime >= 1140 & daytime < 1200) { //from 7 to 8 pm, it gets darker
        darkness = map(daytime, 1140, 1200, 0, 120);
    } else if (daytime >= 360 & daytime < 1140) { //in the middle of the day, it's not dark
        darkness = 0;
    } else { //in the middle of the night, it's dark
        darkness = 120;
    }
}

function draw() {
    noStroke();
    background(155, 207, 207);

    //row of grass bunches
    for (var i = 0; i <2; i++){
        for(var j = 0; j<=width; j += 20) {
        grass(j, 220);
        }
    }
    
    //sand
    fill(196, 178, 122);
    rect(0, 200, width, 200);

    //little specks in sand
    strokeWeight(3);
    stroke(146, 128, 72)
    for (var i = 0; i<50; i++){
        point(sandspotX[i], sandspotY[i]);
    }
    noStroke();

    //assorted shells and starfish
    starfish(250, 250, color(120, 130, 120), 10);
    starfish(50, 340, color(50, 74, 64), 50);
    starfish(180, 370, color(120, 79, 97), 5);
    shell(140, 260, color(60, 50, 70), color(100, 80, 107), 60);
    shell(300, 300, color(80, 50, 50), color(120, 80, 97), -5);

    //waves
    waveShift = randomGaussian(1, 2);
    fill(30, 100, 155, 240);
    rect(0, waveY+waveShift, width, 300);
    fill(30, 100, 155, 100);
    rect(0, waveY-(random(1,3))+waveShift, width, 300);

    //rectangle that makes darkness and lightness of environment using alpha channel
    blendMode(MULTIPLY);
    fill(35, 50, 70, darkness);
    rect(0,0,width,height);
    blendMode(BLEND);
}

//makes starfish
function starfish(x,y, color, spin){
    push();
    translate(x,y);
    rotate(radians(spin));
    strokeWeight(4);
    stroke(color);
    for (var i = 0; i<5; i++){ //draw five arms from 0,0, rotating after each one
        line(0,0,0,-10);
        rotate(radians(72));
    }
    noStroke();
    pop();
}

//makes seashells
function shell(x,y, color1, color2, spin) {
    push();
    translate(x,y);
    rotate(radians(spin));
    strokeWeight(1);
    stroke(color1);
    fill(color2);

    var radius = 7; //radius of seashell, ie distance from circles to center
    var size = 12; //size of circles themselves
    var angle = radians(0); //theta of circle location
    for (var i = 0; i<20; i++) { //draw circles that get smaller as they get closer to the center
        ellipse ( cos(angle)*radius, sin(angle)*radius, size);
        angle-=radians(24);
        size -= i/20; //decrease size of circles
        radius -= i/30; //decrease radius of seashell       
    }
    noStroke();
    pop();
}

//makes a bunch of grass
function grass(x,y){
    push();
    translate(x,y);
    stroke(65, 100, 52);
    strokeWeight(2);
    rotate(radians(-40));
    for (var i = 0; i < 20; i++){ //creating each blade of grass in a bunch
        for (var j = 0; j < 20; j++){ //creating random lengths for each blade of grass
            grasslength[j] = random(35, 40);
        }
        line(0,0,0, -1*grasslength[i]);
        rotate(radians(4));
    }

    pop();
}