Predator and Prey!!
in
Programming Questions
•
11 months ago
Hey guys! So I'm creating a "predator/prey" simulation! I got most of this code down! I'm sure just struggling with a couple things. I want to make it so
1. the amount of images on screen is random every time
2. im3 is scared of img2, and img 2 is scared of img1
(img3 is a block of cheese, img2 is a mouse, and img1 is a cat)
3. I dont want them to leave my screen! For some reason they keep going off screen at the bottom. Also, these images used to be ellipses but I changed them to actual pictures so just ignore all the ellipse stuff
HERES MY CODE! thank you so much for your time
1. the amount of images on screen is random every time
2. im3 is scared of img2, and img 2 is scared of img1
(img3 is a block of cheese, img2 is a mouse, and img1 is a cat)
3. I dont want them to leave my screen! For some reason they keep going off screen at the bottom. Also, these images used to be ellipses but I changed them to actual pictures so just ignore all the ellipse stuff
HERES MY CODE! thank you so much for your time
- PImage img;
- PImage img1;
- PImage img2;
- PImage img3;
- float pY = 0; // variable that controls y coordinate of prey ellipse
- float pX = 0; // variable that controls x coordinate of prey ellipse
- float gY = 0; // variable that controls y coordinate of green predator ellipse
- float gX = 0; // variable that controls x coordinate of green predator ellipse
- float rY = 0; // variable that controls y coordinate of red predator ellipse
- float rX = 0; // variable that controls x coordinate of red predator ellipse
- float pMoveY; // variable that changes in the y to move the prey ellipse
- float pMoveX; // variable that changes in the x to move the prey ellipse
- float gMoveY; // variable that changes in the y to move the green predator ellipse
- float gMoveX; // variable that changes in the x to move the green predator ellipse
- float rMoveY; // variable that changes in the y to move the red predator ellipse
- float rMoveX; // variable that changes in the x to move the red predator ellipse
- float maxSpeed = 4.0; // variable that sets the maximum speed at which creatures can move
- float radius = 80.0; // variable that sets the size of the ellipses
- boolean pScared = false; // boolean variable that lets the white ellipse to remain scared
- void setup() {
- img = loadImage("rave.jpg");
- img1 = loadImage("nyan.png");
- img2 = loadImage("mouse.png");
- img3 = loadImage ("cheese.png");
- size(800, 600); // sets the size of the sketch
- pMoveX=random(-maxSpeed, maxSpeed); // sets the white ellipse speed in the x
- pMoveY=random(-maxSpeed, maxSpeed); // sets the white ellipse speed in the y
- gMoveX=random(-maxSpeed, maxSpeed); // sets the green ellipse speed in the x
- gMoveY=random(-maxSpeed, maxSpeed); // sets the green ellipse speed in the y
- rMoveX=random(-maxSpeed, maxSpeed); // sets the red ellipse speed in the x
- rMoveY=random(-maxSpeed, maxSpeed); // sets the red ellipse speed in the y
- rX=random(width-radius); // sets the starting position of the red ellipse in the x
- rY=random(height-radius); // sets the starting position of the red ellipse in the y
- gX=random(width-radius); // sets the starting position of the green ellipse in the x
- gY=random(height-radius); // sets the starting position of the green ellipse in the y
- pX=random(radius*2, width-radius*2); // sets the starting position of the white ellipse in the x
- pY=random(radius*2, height-radius*2); // sets the starting position of the white ellipse in the y
- ellipseMode(RADIUS); // sets ellipses to draw using the last two numbers as radius width and radius height
- }
- void draw() {
- background(img);
- //////////RED "PREDATOR" ELLIPSE LOGIC
- rX+=rMoveX; // these 2 lines move the red ellipse
- rY+=rMoveY;
- if (rX>width-radius || rX<radius) { // these two if statements check to see if the red ellipse is still on screen and if not, then reverses the direction in which it is moving
- rMoveX=-rMoveX;
- }
- if (rY>width-radius || rY<radius) {
- rMoveY=-rMoveY;
- }
- fill(255, 0, 0); //sets the fill to red so the red ellipse is drawn as red
- image(img1, rX, rY, radius, radius); // draws red ellipse
- //////////GREEN "PREDATOR" ELLIPSE LOGIC
- gX+=gMoveX; // these 2 lines move the green ellipse
- gY+=gMoveY;
- if (gX>width-radius || gX<radius) { // these two if statements check to see if the green ellipse is still on screen and if not, then reverses the direction in which it is moving
- gMoveX=-gMoveX;
- }
- if (gY>width-radius || gY<radius) {
- gMoveY=-gMoveY;
- }
- fill(0, 255, 0);
- image(img3, gX, gY, radius, radius);
- //////////WHITE "PREY" ELLIPSE LOGIC
- pX+=pMoveX; // these 2 lines move the white "prey" ellipse
- pY+=pMoveY;
- if (pX>width-radius*2 || pX<radius*2) { // these two if statements check to see if the white ellipse is still on screen and if not, then reverses the direction in which it is moving
- pMoveX=-pMoveX;
- }
- if (pY>width-radius*2 || pY<radius*2) {
- pMoveY=-pMoveY;
- }
- if (dist(rX, rY, pX, pY)<radius*2 || dist(gX, gY, pX, pY)<radius*2) { // this if statement checks to see if the white ellipse is near either of the predator ellipses
- if (pScared==false) {
- pMoveY=-pMoveY; // if the white ellipse is close to a predator, then it reverses direction in the y
- pMoveX=-pMoveX; // if the white ellipse is close to a predator, then it reverses direction in the x
- pScared=true;
- }
- }
- else {
- pScared=false; // if the white ellipse will remain "scared" until it is not near either predator
- }
- if (pScared==true) { // if the white ellipse is "scared" then it remains yellow
- fill(255, 255, 0);
- }
- else { // // if the white ellipse is not "scared" then it is white
- fill(255);
- }
- image(img2, pX, pY, radius*2, radius*2); // draw the white ellipse
- }
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