//Tristan Szakacs
//Project one

float creatureX;
float creatureY;
float stalkerX, stalkerY;
float horizon;
float sunX, sunY;
color night = color( 255);
color day = color( 200, 200, 0);
float birbX, birbY;
float x = 100;
float y = 0;
float speed = 0;
float gravity = 0.1;
void setup()
{
  size(500, 500);
  horizon = height/4;
}

void draw() 
{
    sky();
    sun();
    grass();
    house();
    tree();
    creature1();
    stalker();
    birb();
    if( keyPressed ){
      if( key == 'b' || key == 'B') {
        missile();
      }
    }
}  


//Method to create the sky.
void sky()
{
  if( sunX < (width * 0.65)) background( 50, 100, 200);
  if( sunX > (width * 0.65)) background(50, 100,  125);
}

//Method to create the Sun.
void sun()
{
  ellipseMode(CENTER);
  fill( day);
  ellipse( (float) sunX, sunY, 90, 90);
  sunX= (sunX + 1) % (width+100)-0.5;
  sunY= horizon-20 - 0.75 * horizon * sin( PI * sunX/width );
  stroke(1);
  
  if( sunX > (width * 0.65)) day = night;
  if( sunX < (width * 0.65)) day = color(200, 200, 0);
}

void house()
{ 
  rectMode(CENTER);
  fill(175, 100, 0);
  rect(250, 225, 100, 100);
  fill(0);
  triangle(175, 200, 250, 100, 325, 200);  
  
  //Pathway to house.
  rectMode(CENTER);
  fill(30);
  rect( 250, 400, 40, 250);
}

 void tree()
{
   //Creates tree, and sets color.
  rectMode(CENTER);
  ellipseMode(CENTER);
  fill(125, 20, 0);
  rect(125, 225, 40, 90);
  fill( 0, 127, 0);
  ellipse( 125, 180, 90, 90);
}    

void grass()
{
    rectMode(CENTER);
    fill(0, 127, 0);
    rect(250, 500, 500, 500);
}
  //Method to create creature 1.
void creature1()
{
    creatureX = creatureX + (mouseX-creatureX) / 10;
    creatureY = creatureY + (mouseY-creatureY) / 20;
    fill(250);
    ellipse( creatureX, creatureY-30, 50, 50);
    line( creatureX, creatureY-10, creatureX, creatureY+75);
    
    line( creatureX, creatureY+75, creatureX+10, creatureY+90);
    line( creatureX, creatureY+75, creatureX-10, creatureY+90);
}  
  //Creature 2.
void stalker()
 {
    stalkerX = stalkerX + (creatureX-stalkerX) / 40;
    stalkerY = stalkerY + (creatureY-stalkerY) / 60;
    fill(75);
    ellipseMode(CENTER);
    rect( stalkerX, stalkerY, 25, 90);
    ellipse( stalkerX, stalkerY-30, 50, 50);
    line( stalkerX, stalkerY+40, stalkerX+10, stalkerY+60);
    line( stalkerX, stalkerY+40, stalkerX-10, stalkerY+60);
 }  
 
 void birb()
 {
    triangle( (float) birbX, birbY + 5, birbX, birbY + 20, birbX - 20, birbY + 5);
    birbX = (birbX - 2) % width;
    if ( birbX < 0) {
      birbX = 500;
    }
 }
 
void missile()
{
    rect(birbX,y,10, 10);
    
    y = y + speed;
    speed = speed + gravity;
    if ( y > height) {
      speed = speed * -0.75;
    }
}