From e6c65d33e68fdfe3b28bff284c62ead374566504 Mon Sep 17 00:00:00 2001
From: Brian Silverman <brians@playfulinvention.com>
Date: Wed, 30 May 2007 13:28:45 +0000
Subject: Initial import

---
(limited to 'turtle.py')

diff --git a/turtle.py b/turtle.py
new file mode 100755
index 0000000..dc1b0b6
--- /dev/null
+++ b/turtle.py
@@ -0,0 +1,195 @@
+import gtk
+from math import sin,cos,pi
+
+colors = {}
+buffer = None
+gc = None
+window = None
+width = 0
+height = 0
+sprite = None
+cm = None
+bgcolor = None
+fgcolor = None
+color = 0
+shade = 50
+pensize = 5
+pendown = True
+turtle = None
+
+DEGTOR = 2*pi/360
+
+xcor = 0
+ycor = 0
+heading = 0
+
+color_table = (
+    0xFF0000,0xFF0D00,0xFF1A00,0xFF2600,0xFF3300,0xFF4000,0xFF4D00,0xFF5900,0xFF6600,0xFF7300,
+    0xFF8000,0xFF8C00,0xFF9900,0xFFA600,0xFFB300,0xFFBF00,0xFFCC00,0xFFD900,0xFFE600,0xFFF200,
+    0xFFFF00,0xE6FF00,0xCCFF00,0xB3FF00,0x99FF00,0x80FF00,0x66FF00,0x4DFF00,0x33FF00,0x1AFF00,
+    0x00FF00,0x00FF0D,0x00FF1A,0x00FF26,0x00FF33,0x00FF40,0x00FF4D,0x00FF59,0x00FF66,0x00FF73,
+    0x00FF80,0x00FF8C,0x00FF99,0x00FFA6,0x00FFB3,0x00FFBF,0x00FFCC,0x00FFD9,0x00FFE6,0x00FFF2,
+    0x00FFFF,0x00F2FF,0x00E6FF,0x00D9FF,0x00CCFF,0x00BFFF,0x00B3FF,0x00A6FF,0x0099FF,0x008CFF,
+    0x0080FF,0x0073FF,0x0066FF,0x0059FF,0x004DFF,0x0040FF,0x0033FF,0x0026FF,0x001AFF,0x000DFF,
+    0x0000FF,0x0D00FF,0x1A00FF,0x2600FF,0x3300FF,0x4000FF,0x4D00FF,0x5900FF,0x6600FF,0x7300FF,
+    0x8000FF,0x8C00FF,0x9900FF,0xA600FF,0xB300FF,0xBF00FF,0xCC00FF,0xD900FF,0xE600FF,0xF200FF,
+    0xFF00FF,0xFF00E6,0xFF00CC,0xFF00B3,0xFF0099,0xFF0080,0xFF0066,0xFF004D,0xFF0033,0xFF001A)
+
+def init(win, spr, tspr, bg):
+    global buffer, gc, window, sprite, width, height, bgcolor, fgcolor, cm, turtle
+    window, sprite, buffer, turtle, bgcolor = win.window, spr, spr.image, tspr, bg
+    width, height = buffer.get_size()
+    gc = win.window.new_gc() 
+    cm = gc.get_colormap()
+    gc = buffer.new_gc()
+    clearscreen()
+    
+def clearscreen():
+    global xcor,ycor,heading, pendown
+    xcor, ycor, heading = 0,0,0
+    rect = gtk.gdk.Rectangle(0,0,width,height)
+    gc.set_foreground(bgcolor)
+    buffer.draw_rectangle(gc, True, *rect)
+    inval(0,0,width,height)
+    setpensize(5)
+    setcolor(0)
+    setshade(50)
+    pendown = True
+    move_turtle()
+    turn_turtle()
+    return None
+    
+def forward(n):
+    global xcor,ycor
+    gc.set_foreground(fgcolor)
+    oldx, oldy = xcor, ycor
+    xcor += n*sin(heading*DEGTOR)
+    ycor += n*cos(heading*DEGTOR)
+    if pendown: draw_line(oldx,oldy,xcor,ycor)
+    move_turtle()
+    return None
+
+def seth(n):
+    global heading
+    heading=n
+    heading%=360
+    turn_turtle()
+    return None
+
+def right(n):
+    global heading
+    heading+=n
+    heading%=360
+    turn_turtle()
+    return None
+
+def arc(a,r):
+    gc.set_foreground(fgcolor)
+    if a<0: larc(-a,r)
+    else: rarc(a,r)
+    move_turtle()
+    turn_turtle()
+    
+def rarc(a,r):
+    global xcor,ycor
+    if r<0: r=-r; a=-a
+    cx = xcor+r*cos(heading*DEGTOR)
+    cy = ycor-r*sin(heading*DEGTOR)
+    x,y,w,h=width/2+int(cx-r),height/2-int(cy+r),int(2*r),int(2*r)
+    buffer.draw_arc(gc,False,x,y,w,h,int(180-heading-a)*64,int(a)*64)
+    inval(x-pensize/2-3,y-pensize/2-3,w+pensize+6,h+pensize+6)
+    right(a)
+    xcor=cx-r*cos(heading*DEGTOR)
+    ycor=cy+r*sin(heading*DEGTOR)
+
+def larc(a,r):
+    global xcor,ycor
+    if r<0: r=-r; a=-a
+    cx = xcor-r*cos(heading*DEGTOR)
+    cy = ycor+r*sin(heading*DEGTOR)
+    x,y,w,h=width/2+int(cx-r),height/2-int(cy+r),int(2*r),int(2*r)
+    buffer.draw_arc(gc,False,x,y,w,h,int(360-heading)*64,int(a)*64)
+    inval(x-pensize/2-3,y-pensize/2-3,w+pensize+6,h+pensize+6)
+    right(-a)
+    xcor=cx+r*cos(heading*DEGTOR)
+    ycor=cy-r*sin(heading*DEGTOR)
+
+def setxy(x,y):
+    global xcor,ycor
+    xcor,ycor = x,y
+    move_turtle()
+
+def setpensize(ps):
+    global pensize
+    pensize = ps
+    gc.set_line_attributes(int(pensize),gtk.gdk.LINE_SOLID,gtk.gdk.CAP_ROUND,gtk.gdk.JOIN_MITER)
+    return None
+
+def setcolor(c):
+    global color
+    color = c
+    set_fgcolor()
+    return None
+
+def setshade(s):
+    global shade
+    shade = s
+    set_fgcolor()
+    return None
+
+def fillscreen(c,s):
+    oldc, olds = color,shade
+    setcolor(c); setshade(s)
+    rect = gtk.gdk.Rectangle(0,0,width,height)
+    gc.set_foreground(fgcolor)
+    buffer.draw_rectangle(gc, True, *rect)
+    inval(0,0,width,height)
+    setcolor(oldc); setshade(olds)
+    return None
+    
+def set_fgcolor():
+    global fgcolor
+    sh = (wrap100(shade)-50)/50.0
+    rgb = color_table[wrap100(color)]
+    r,g,b = (rgb>>8)&0xff00,rgb&0xff00,(rgb<<8)&0xff00
+    r,g,b = calc_shade(r,sh),calc_shade(g,sh),calc_shade(b,sh)
+    fgcolor = cm.alloc_color(r,g,b)
+
+def wrap100(n):
+    n = int(n)
+    n %= 200
+    if n>99: n=199-n
+    return n
+
+def calc_shade(c,s):
+    if s<0: return int(c*(1+s*.8))
+    return int(c+(65536-c)*s*.9)
+
+def setpen(bool):
+    global pendown
+    pendown = bool
+
+def draw_line(x1,y1,x2,y2):
+    x1,y1 = width/2+int(x1), height/2-int(y1)
+    x2,y2 = width/2+int(x2), height/2-int(y2)
+    if x1<x2: minx,maxx=x1,x2
+    else: minx,maxx=x2,x1
+    if y1<y2: miny,maxy=y1,y2
+    else: miny,maxy=y2,y1
+    w,h=maxx-minx,maxy-miny
+    buffer.draw_line(gc,x1,y1,x2,y2)
+    inval(minx-pensize/2-3,miny-pensize/2-3,w+pensize+6,h+pensize+6)
+
+def turn_turtle():
+    turtle.setshape(shapelist[(int(heading+5)%360)/10])
+
+def move_turtle():
+    x,y = width/2+int(xcor), height/2-int(ycor)
+    turtle.move((sprite.x+x-30,sprite.y+y-30))
+    inval(x-30,y-30,60,60)
+
+def inval(x,y,w,h):
+    rect = gtk.gdk.Rectangle(int(x+sprite.x),int(y+sprite.y),int(w),int(h))
+    window.invalidate_rect(rect, False)
+
+
--
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