/*Triangle practice PCS 6th grade - Z. J. Wood 10/2015 */
/* click each of the specified missing vertices */
/* Winslow mod  - click wherever you want to draw final vertex
  include 4 triangles*/

void setup() {

  size(800, 800);
  v1x = 400;
  v1y = 300;
  v2x = 600;
  v2y = 100;
  v3x = 550;
  v3y = 550;
  C1x = 400;
  C1y = 300;
  C2x = 500;
  C2y = 400;
  C3x = 300;
  C3y = 500;
  mouseX = mouseY = 100;
  anim1 = true;
  anim2 = anim3 = anim4 =false;
}

void mousePressed() {
  if (anim1) {
    anim1 = false;
    C1x = t2x = mouseX;
    C1y = t2y = mouseY;
    anim2 = true;
  } else if (anim2) {
    anim2 = false;
    C2x = mouseX;
    C2y = mouseY;
    anim3 = true;
  } else if (anim3) {
    anim3 = false;
    C3x = mouseX;
    C3y = mouseY;
    anim4 = true;
  }else if (anim4) {
    anim4 = false;
    C4x = mouseX;
    C4y = mouseY;
  }
}

void draw() {

  background(12, 34, 56);

  drawGrid();
  fill(250, 200, 200);

  text("Draw whatever you want, by clicking the mouse", 20, 20);
  if (anim1) {
    fill(250, 250, 24);
    triangle(mouseX, mouseY, 200, 200, 200, 400);
  } else {
    fill(250, 250, 240);
    triangle(C1x, C1y, 200, 200, 200, 400);
  }

  if (anim2) {
    fill(250, 250, 24);
    triangle(mouseX, mouseY, 200, 200, t2x, t2y);
  } else if (!anim1 && !anim2) {
    fill(250, 250, 240);
    triangle(C2x, C2y, 200, 200, t2x, t2y);
  }

  if (anim3) {
    fill(250, 250, 24);
    triangle(mouseX, mouseY, 200, 400, t2x, t2y);
  } else if (!anim1 && !anim2 && !anim3) {
    fill(250, 250, 240);
    triangle(C3x, C3y, 200, 400, t2x, t2y);
  }

  if (anim4) {
    fill(250, 250, 24);
    triangle(mouseX, mouseY, C3x, C3y, 200, 400);
  } else if (!anim1 && !anim2 && !anim3) {
    fill(250, 250, 240);
    triangle(C4x, C4y, C3x, C3y, 200, 400);
  }
  fill(255);
  text("Current {x, y}: {" + mouseX + ", " +mouseY + "}", 20, 40);
}

int C1x, C1y, C2x, C2y, C3x, C3y, C4x, C4y;
int v1x, v1y, v2x, v2y, v3x, v3y;
int t2x, t2y, t3x, t3y;
boolean v1, v2, v3;
boolean anim1, anim2, anim3, anim4; 

/*Method to draw a grid every 50th pixel */
void drawGrid() {
  //the horizontal lines - every 50th pixel draw a line

  for (int i=0; i < height/50; i++) {
    if (i%2 == 0) {
      strokeWeight(1);
      stroke(0, 0, 128);
    } else {
      strokeWeight(2);
      stroke(128, 128, 128);
    }
    line(0, (i+1)*50, width, (i+1)*50);
  }

  //the vertical lines - every 50th pixel draw a line

  for (int i=0; i < width/50; i++) {
    if (i%2 == 0) {
      stroke(128, 0, 128);
      strokeWeight(1);
    } else {

      strokeWeight(2);
      stroke(128, 128, 128);
    }
    line((i+1)*50, 0, (i+1)*50, height);
  }
}