Zombies and Binary

You may not use the PHP bitwise operators but every conditional you do is binary logic. These boolean comparisons underpin every-day programming and they can also be modelled in Minecraft. In fact, Minecraft is also a great place to model the internals of many common electronic components!

Transcript

1. Binary
2. $ php -a Interactive shell
3. php > if (true) php > print "success"; success
4. php > if (true and false) php > print "success";
5. The sound of a thousand crickets...
6. php > if (true and false) php > print "success"; and wants both to be true
7. php > if (true or false) php > print "success"; success
8. php > if (false or true) php > print "success"; success
9. With added variables!
10. php > $one = true; php > $two = false; php > $three = true;
11. php > if (($one and $two) and $three) php > print "success";
12. ...chirp
13. php > if (($one and $two) and $three) php > print "success"; this is false...
14. php > if (($one and !$two) and $three) php > print "success"; success So we invert it!
15. Success!
16. Zombies
17. * * with a custom theme
18. Includes mining...
19. ...and crafting!
20. With added skellingtons!
21. ...zombies
25. ...and creepers
26. The bits that are important to us
27. switch
28. redstone (unpowered)
29. redstone (powered)
30. redstone lamp (unpowered)
31. redstone lamp (powered)
32. repeater
33. signal attenuation
34. problem?
35. redstone torch (powered)
36. redstone torch (unpowered)
37. and gate
38. input #1 input #2
39. If both inputs are on the output is on
40. or gate
41. input #1 input #2
42. If either input is on the output is on
43. Repeaters are diodes!
44. inverter (!)
45. Input off Output on
46. Input on Output off
48. all switches are off...
49. $one = false; $two = false; $three = false;
50. $one = !$one; $two = !$two; $three = !$three;
51. $con1 = $one and $two;
52. $con2 = $three and $con1;
53. if ($con2) light();
54. W AT!
55. Minecraft does: allow us to model logic (by comparison) help us to think visually about control flow
56. Minecraft does not: implement voltage, current, resistance etc. make variable storage easy
57. 4051 (multiplexer)
59. accepts 1 input accepts 3 selection pins (high/low) passes the 1 input through to one of 8 outputs, depending on on the selection pins
60. Sound familiar?
62. Minecraft simulation of the internals of the multiplexer!
63. Commandore 32
67. Commandore 32 32x32 pixel screen 16 colour (wool) 6kb vram 32 bit bit.ly/commandore32
68. Thanks! twitter.com/assertchris joind.in/12313 bit.ly/arduino-minecraft