// "Snake"
//
// This macro set demonstrates how to use numeric keypad keys
// as shortcuts, how to generate and use a custom color LUT,
// how to create an image centered on the screen and how to
// display HTML formatted messages in dialog boxes.
//
// Keypad keys:
// + - start
// 8 - move up
// 6 - move right
// 2 (or 5) - move down
// 4 - move left
//
// Hint: Green and cyan are good, red and black are bad.
var d,x,y,score,level;
var s=128;
macro "New Game [n+]" {
score=0; level=1;
while (level<=10) {
initPlayBoard();
exitLevel=false;
while(!exitLevel) {
checkCurrentDirection();
if (getPixel(x,y)==1)
youAteSomethingGood();
else if ((getPixel(x,y)==2)||((getPixel(x,y)==0)&&(d!="")))
youAteSomethingBad();
else if (getPixel(x,y)==4)
exitLevel=true;
else
setPixel(x,y,0);
wait(100-level*8);
updateDisplay();
}
beep;
level++;
}
level--;
showMessage(
"<html><font size=+3>Congratulations!</font><p>"+
"<font size=+2>Level: "+level+"</font><br>"+
"<font size=+2>Score: "+score+"</font>"
);
close;
}
macro"Up [n8]" {d="U";}
macro"Down [n2]" {d="D";}
macro"Down [n5]" {d="D";}
macro"Right [n6]" {d="R";}
macro"Left [n4]" {d="L";}
function initPlayBoard() {
reuse = nImages>0;
if (reuse) reuse = startsWith(getTitle, "Level ");
if (reuse)
rename("Level "+level+" Score "+score);
else {
if (getVersion>="1.37e")
call("ij.gui.ImageWindow.centerNextImage");
newImage("Level "+level,"8-bit",s,s,1);
run("View 100%"); run("In"); run("In");
}
x=s/2;y=x;d="";
r=newArray(0, 0, 255, 255, 0, 220);
g=newArray(0, 200, 0, 255, 255, 230);
b=newArray(0, 0, 0, 255, 255, 255);
setLut(r,g,b); // a custom LUT with just 5 colors.
setColor(3); fillRect(0,0,s,s); // the white image bckgd
setColor(0); drawRect(0,0,s,s); // the black image frame
setColor(5); // the backgroung text color
setFont("Monospaced",32,"bold"); setJustification("center");
drawString("ImageJ",s/2,s/3);
drawString("Snake",s/2,2*s/3);
drawString("Game",s/2,s);
addItem(20,1); // 20 green color food
addItem(20,2); // 20 red color poison
addItem( 1,4); // 1 cyan color door to next level
setPixel(x,y,0); // sets start position to center
}
function addItem(f,type) {
setColor(type);
for (i=0;i<f;i++) {
xf=s/10+random()*s*0.8;
yf=s/10+random()*s*0.8;
if (yf<s/2) {side=-1;}
if (type==4) {
side =1;
if (yf<s/2) side=-1;
drawRect(xf,(s/2+side*0.4*s),10,2);
} else
drawRect(xf,yf,2,2);
}
}
function checkCurrentDirection() {
if (d=="U") {y=y-1;}
else if(d=="D") {y=y+1;}
else if(d=="L") {x=x-1;}
else if(d=="R") {x=x+1;}
}
function youAteSomethingBad() {
run("Find Edges");
showMessage(
"<html><font size=+3>Game Over</font><p>"+
"<font size=+2>Level: "+level+"</font><br>"+
"<font size=+2>Score: "+score+"</font>"
);
close;
exit;
}
function youAteSomethingGood() {
for (i=x-1;i<=x+1;i++) {
for (j=y-1;j<=y+1;j++) {
if (getPixel(i,j)==1)
setPixel(i,j,3);
}
}
score++;
rename("Level "+level+" Score "+score);
beep();
}