initial commit

README.md

@@ -0,0 +1,37 @@
+# PLOGO
+
+Purchase LOGO
+
+A toy language.
+
+A kind of LOGO-like DSL built in the p5.js library.
+
+This is a rudimentary proof of concept right now with globals and without implementing classes or ability to loop.
+
+## Commands
+
+```
+//movement
+
+forward(n); //moves n pixels ahead
+
+back(n); //moves n pixels back
+
+left(Δ);  //turns Δ degrees to the left
+
+right(Δ); //turns Δ degrees to the right
+
+//drawing
+
+penup(); //will draw a line with movement commands
+
+pendown(); //will move to x,y coordinates without drawing line
+           //By default, pendown is on / true
+
+//randomness
+
+randint(n); //returns a random int between 0 and n (exclusive)
+	    //if no input, default is between 0 and 100
+            //example: forward(randint(30)); 
+```
+

sketch.js

@@ -1,4 +1,4 @@
-let angle,x,y;
+let angle,x,y,drawing=true;
 function setup(){
   createCanvas(windowWidth,windowHeight); //canvas is size of window
   resetDefaults();
@@ -18,7 +18,11 @@ function forward(d,startx=x, starty = y, _angle = angle){
 
   let newX = startx+d*sin(_angle);
   let newY = starty+d*cos(_angle);
-  line(startx,starty,newX,newY);
+
+  if (drawing){
+    line(startx,starty,newX,newY);
+  }
+
   x=newX
   y=newY
 }
@@ -26,10 +30,13 @@ function back(d,startx=x, starty = y, _angle =360- angle){
 
   let newX = startx+d*sin(_angle);
   let newY = starty+d*cos(_angle);
-  line(startx,starty,newX,newY);
+
+  if (drawing){
+    line(startx,starty,newX,newY);
+  }
+
   x=newX
   y=newY
-
 }
 function left(_angle){
  angle=180+_angle;
@@ -37,6 +44,14 @@ function left(_angle){
 function right(_angle){
   angle=_angle;
 }
+
+function pendown(){
+  drawing=true;
+}
+function penup(){
+  drawing=false;
+}
+
 function randint(max=100){ 
   //default returns int between 0 and 100
   return int(random(max))

turtle.js

@@ -1,3 +1,11 @@
 function turtle(){
-  forward(randint(100));
+
+  right(randint(100));
+  forward(randint(200));
+
+  right(randint());
+  forward(randint());
+
+  right(randint(45));
+  forward(randint(300));
 }