1 files changed, 108 insertions, 0 deletions
diff --git a/my_turtle.py b/my_turtle.py
new file mode 100755
index 0000000..421459c
--- /dev/null
+++ b/my_turtle.py
@@ -0,0 +1,108 @@
+# my_turtle.py
+import g,pygame,utils
+
+class TurtleClass: # used only for keeping track of the right hand turtle
+        
+    def setup(self):
+        steps=0
+        for n in self.current: steps=steps+4*n
+        self.steps=steps
+        self.x1=g.x1+4.0*g.dd; self.y1=g.y0+6.0*g.dd; self.dx=0; self.dy=-g.dd
+        self.step_count=0
+        self.ms=pygame.time.get_ticks()
+        self.running=False; self.crashed=False; self.changed=False
+        self.win=False
+        
+    def move(self):
+        if self.step_count<self.steps:
+            d=pygame.time.get_ticks()-self.ms
+            if d<0 or d>g.delay: #time to move
+                g.redraw=True
+                x2=self.x1+self.dx; y2=self.y1+self.dy    
+                self.x1=x2; self.y1=y2
+                self.step_count+=1
+                self.ms=pygame.time.get_ticks()
+        else:
+            self.running=False
+            
+    def help1(self):
+        x1=g.x1+4*g.dd; y1=g.y0+6*g.dd; dx=0; dy=-g.dd; steps=0; angle=0; n=0
+        for j in self.current:
+            for k in range(j):
+                steps+=1
+                x2=x1+dx; y2=y1+dy
+                pygame.draw.line(g.screen,utils.CYAN,(x1,y1),(x2,y2),4)
+                x1=x2; y1=y2
+            if dy==-g.dd: dx=g.dd;dy=0;angle=90
+            elif dx==g.dd: dx=0;dy=g.dd;angle=180
+            elif dy==g.dd: dx=-g.dd;dy=0;angle=270
+            else: dx=0;dy=-g.dd;angle=0
+            n+=1
+            if n==g.help1: break
+        utils.centre_blit(g.screen,g.turtle,(x2,y2),angle)
+        self.step_count=steps
+                
+    def draw(self):
+        x1=g.x1+4*g.dd; y1=g.y0+6*g.dd; dx=0; dy=-g.dd; steps=0; angle=0
+        x2=x1; y2=y1 # in case we haven't moved yet - for turtle image
+        done=True; n=0
+        for i in range(4):
+            for j in self.current:
+                for k in range(j):
+                    steps+=1
+                    if not g.show_help:
+                        if steps>self.step_count: done=False; break
+                    x2=x1+dx; y2=y1+dy
+                    pygame.draw.line(g.screen,utils.CYAN,(x1,y1),(x2,y2),4)
+                    x1=x2; y1=y2
+                if not g.show_help:
+                    if steps>self.step_count: break
+                if dy==-g.dd: dx=g.dd;dy=0;angle=90
+                elif dx==g.dd: dx=0;dy=g.dd;angle=180
+                elif dy==g.dd: dx=-g.dd;dy=0;angle=270
+                else: dx=0;dy=-g.dd;angle=0
+                if g.show_help:
+                    n+=1
+                    if n==g.help1: self.step_count=steps; break
+            if g.show_help:
+                if n==g.help1: break
+            elif steps>self.step_count: break
+        img=g.turtle
+        if self.crashed: img=g.crash
+        utils.centre_blit(g.screen,img,(x2,y2),angle)
+        d8=8*g.dd
+        if not g.show_help:
+            if abs(x2-g.x1)<.1 or abs(x2-(g.x1+d8))<.1 or abs(y2-g.y0)<.1 or abs(y2-(g.y0+d8))<.1:
+                if not self.crashed==True: g.crash_drawn=False
+                self.running=False; self.crashed=True
+            elif done:
+                self.win=correct(self.current)
+                if self.win:
+                    if g.finale==False:
+                        if g.help2>5: g.help2=5
+                        g.score=g.score+6-g.help2
+                    g.finale=True
+               
+def correct(current):
+    return trace(g.goal)==trace(current)
+
+def trace(l): # returns a list based on the line segments drawn
+    hl=[0,0,0,0,0,0,0]; vl=[0,0,0,0,0,0,0]
+    x1=3;y1=1;dx=0;dy=1
+    for i in range(4):
+        for j in l:
+            for k in range(j):
+                x2=x1+dx; y2=y1+dy;mark(hl,vl,x1,y1,x2,y2); x1=x2; y1=y2
+            if dy==-1: dx=-1;dy=0
+            elif dx==1: dx=0;dy=-1
+            elif dy==1: dx=1;dy=0
+            else: dx=0;dy=1
+    return hl+vl
+
+def mark(hl,vl,x1,y1,x2,y2):
+    twos=[1,2,4,8,16,32]
+    if x1==x2: #vertical
+        y=min(y1,y2);vl[x1]=vl[x1]|twos[y]
+    else:
+        x=min(x1,x2);hl[y1]=hl[y1]|twos[x]
+