Hi i have just started Processing at university. i am trying to create color track maze game using web cam. I cant seem to get my cursor to collide with my maze_1.png i have spent hours trying to fix it but i have no idea how. I would be forever grateful is someone could help. Thanks in advance.
Tab 1
// Kieron Scott
PImage maze1;
PImage littlemochi;
class Snake {
// x and y positions
int[] xpos;
int[] ypos;
// The constructor determines the length of the snake
Snake(int n) {
xpos = new int[n];
ypos = new int[n];
}
void update(int newX, int newY) {
// Shift all elements down one spot.
// xpos[0] = xpos[1], xpos[1] = xpos = [2], and so on. Stop at the second to last element.
for (int i = 0; i < xpos.length-1; i ++ ) {
xpos[i] = xpos[i+1];
ypos[i] = ypos[i+1];
}
// Update the last spot in the array with the mouse location.
xpos[xpos.length-1] = newX;
ypos[ypos.length-1] = newY;
}
void display() {
// Draw everything
littlemochi = loadImage("littlemochi.png");
for (int i = 0; i < xpos.length; i ++ ) {
// Draw an ellipse for each element in the arrays.
// Color and size are tied to the loop's counter: i.
stroke(0);
fill(5-i*5);
image(littlemochi,xpos[i],ypos[i],i,i);
}
}
}
Tab 2
// Kieron Scott
import processing.video.*;
// Variable for capture device
Capture video;
// A variable for the color we are searching for.
color trackColor;
// A Snake variable
Snake snake;
void setup() {
size(640,480);
video = new Capture(this,width,height,15);
// Start off tracking for red
trackColor = color(255,0,0);
smooth();
maze1 = loadImage("maze_1.png");
// Initialize the snake
snake = new Snake(20);
}
void draw() {
// Capture and display the video
if (video.available()) {
video.read();
}
video.loadPixels();
image(video,0,0);
image(maze1, 0, 0);
// Before we begin searching, the "world record" for closest color is set to a high number that is easy for the first pixel to beat.
float worldRecord = 500;
// XY coordinate of closest color
int closestX = 0;
int closestY = 0;
// Begin loop to walk through every pixel
for (int x = 0; x < video.width; x ++ ) {
for (int y = 0; y < video.height; y ++ ) {
int loc = x + y*video.width;
//int loc = (video.width - x - 1) + y*video.width;
// What is current color
color currentColor = video.pixels[loc];
float r1 = red(currentColor);
float g1 = green(currentColor);
float b1 = blue(currentColor);
float r2 = red(trackColor);
float g2 = green(trackColor);
float b2 = blue(trackColor);
// Using euclidean distance to compare colors
float d = dist(r1,g1,b1,r2,g2,b2); // We are using the dist( ) function to compare the current color with the color we are tracking.
// If current color is more similar to tracked color than
// closest color, save current location and current difference
if (d < worldRecord) {
worldRecord = d;
closestX = x;
closestY = y;
}
}
}
// We only consider the color found if its color distance is less than 10.
// This threshold of 10 is arbitrary and you can adjust this number depending on how accurate you require the tracking to be.
if (worldRecord < 10) {
// Update the snake's location
snake.update(closestX,closestY);
}
snake.display();
}
void mousePressed() {
// Save color where the mouse is clicked in trackColor variable
