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Object Collision Question

[3 Replies]
- 12-Jun-2013 08:00 PM
- Forum: Programming Questions
Hello, first question here!

I need to have the slime spots dropped by pressing 'F' to cause the ants to die. I'm new to coding and am struggling with this final aspect of my program. I cannot get my collision code to work. Any help or advice would help. I tried to include only the relevant code

------------------------------------------------------------------------

int gameState = 0;

float angle = radians(15); // rotate snail

float x = 200;

float y = 200;

boolean Slimespot = false;

float slimeangle = radians(15);

float slimeX = 200;

float slimeY = 200;

float rotateSpeed = 0.015;

float speed = 1.2;

float up = 0;

float down = 0;

float left = 0;

float right = 0;

int score = 0;

float counter = 21;

float antx = 300.0;

float anty = 100.0;

float antradius = 15.0;

float antspeedX = 2.5;

float antspeedY = 2;

float antdirectionX = 1;

float antdirectionY = -1;

boolean squareCollided = false;

class Slime {

    PImage slime;

    PVector position;

    float x = 0;

    float y = 0;

    float angle = 0;

    boolean Slimespot = false;

   }

Slime[] slimetrail = new Slime[5];

int currentSlime = 0;

   void setup() {

    size(400,400);

    smooth();

    textFont(createFont("Impact", 24));

    ellipseMode(RADIUS);

for (int i = 0; i < 5; i++) {

    slimetrail[i] = new Slime () ;

    }

slime.filter(POSTERIZE,10);

}

void draw() { // this is run repeatedly.

String C = "Hypnosnail and the Ants";

String W = "You Win.";

String L = "You Lose!";

String T = "Time: " + (int)counter;

String S = "Dead Ants: " + score;

counter = counter - 0.0167;

image(grass,200,200,height,width);

fill (255,200,200);

frameRate(1);

text(C, 155 , 30);

pushMatrix();

translate(antx,anty);

if(squareCollided == true) {

    scale (.5, .5);

    rotate(-5);

    antspeedX = 0;

    antspeedY = 0;

    image(slime, slime.position.x, slime.position.y, 50,50);

    score = score + 1;

}

else {

     scale (antdirectionX, 1);

    }

image( ant, 20, 20, 30, 35);

popMatrix();

imageMode(CENTER);

antx += sin(anty * .08 ) + (antspeedX * antdirectionX);

if ((antx >= width- antradius) || (antx <= antradius)) {

    antdirectionX = -antdirectionX;

    }

ant y += sin(antx * .1) + (antspeedY * antdirectionY);

    if ((anty >= height- ant radius) || (anty <= ant radius)) {

        antdirectionY = -antdirectionY;

    }

frameRate(60);

text(T, 10, 380);

text(S, 10, 360);

frameRate(15);

slime.filter(INVERT);

frameRate(60);

pushMatrix();

translate(x, y);

rotate(angle);

imageMode(CENTER);

image(snail, 0, 0, 130, 150);

popMatrix();

angle += rotateSpeed * (right - left);

x += cos(angle) * speed * (up - down);

y += sin(angle) * speed * (up - down);

for (int i = 0; i < 5; i++) {

        if (slimetrail[i]. Slimespot == true) {

            image(slime, slimetrail[i].x, slimetrail[i].y, 50,50);

        }

    }

}

void keyReleased() {

if (key == 'f'){

        boolean Slimespot = true;

        slimetrail[currentSlime]. Slimespot = true;

        slimetrail[currentSlime].x = x;

        slimetrail[currentSlime].y = y;

        slimetrail[currentSlime].angle = - angle;

        currentSlime = currentSlime + 1 ;

        if (currentSlime >= 5) {

            currentSlime = 0;

            }

    }

if (rectCollide(antx, anty, antx + antradius * 2, anty + antradius * 2, slimetrail[i].x slimetrail[i].y)) {

        squareCollided = true;

    }

boolean rectCollide(float left, float top, float right, float bottom,

                          float otherLeft, float otherTop, float otherRight, float otherBottom) {

return !(left > otherRight || right < otherLeft || top > otherBottom || bottom < otherTop);

}

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