Jocelyn Lin - Problem Set #2
 
Part 1
p1.dbn 
paper 73

Choose a single shade of a paper and render that shade.
 
Part 2
p2.dbn 
//a hop, skip, & a jump
set h 5
set s (h+5)
set j (h*3)
paper 100

//hop
repeat a h 1
{
   paper ((a*10)+(100-(h*10)))
}
repeat b 1 h
{
   paper ((b*10)+(100-(h*10)))
}

//skip
repeat a s 1
{
   paper ((a*10)+(100-(s*10)))
}
repeat b 1 s
{
   paper ((b*10)+(100-(s*10)))
}

//jump
repeat a j 1
{
   paper ((a*10)+(100-(j*10)))
}
repeat b 1 j
{
   paper ((b*10)+(100-(j*10)))
}

Create a sequence of shaded papers using the Repeat command as a short animation of brightness. For example
Repeat a 0 100
{
Paper a
}
 
Part 3
p3.dbn 
//waltz
set oom 70
set pa 50
set tempo 4
set air (20/tempo)

forever
{
   paper air
   //oom
   repeat w ((oom/tempo) - ((pa/tempo)-air)) (oom/tempo)
   {
      paper (w * tempo)
   }
   //pa
   repeat w air (pa/tempo)
   {
      paper (w * tempo)
   }
   //pa
   repeat w air (pa/tempo)
   {
      paper (w * tempo)
   }
}

Create an animation of a sequence of shaded papers that evokes a sense of rhythm.
 
Part 4
p4.dbn 
//nodding off
set sa 20
set sb 40
set sc 65
set sd 100
set nod 5

//start getting sleepy
repeat s 0 (sa*3)
{
   paper (s/3)
}
paper (sa-nod)

//sleepier
repeat s ((sa-nod)*2) (sb*2)
{
   paper (s/2)
}
paper (sb-nod)

//fell asleep
repeat s (sb-nod) sc
{
   paper s
}
paper (sc-nod)

//stay asleep
repeat s (sc-nod) sd
{
   paper s
}

Create an animation of a sequence of shaded papers that evokes a tranquil, sleepy image.
 
Part 5
p5.dbn 
//warmup scale
set step 8
set interval (100/8)
repeat note step 2
{
   //three consec "notes" (papers)
   paper (note*interval)
   repeat gliss (note*interval) ((note-2)*interval)
   {
      paper ((gliss/interval)*interval)
   }
}
paper interval

Create an animation of a sequence of shaded papers that evokes a gradually increasing/heightening feeling.
 
Part 6
p6.dbn 
set l 50
pen 0
repeat a 0 100
{
   paper 20
   line 20 a a 80
}

Add a single line to the sequence, and let it fly in time. For instance
Repeat a 0 100
{
Paper 0
Line a 0 a 100
}
 
Part 7
p7.dbn 
repeat a 0 100
{
   paper 20
   pen 0
   line 20 a a 80
   pen 43
   line (a*4) 25 ((a*4)+20) 25
}

Add another line and let two lines fly in contrasting styles.
 
Part 8
p8.dbn 
repeat a 0 100
{
   paper 20
   pen 43
   line 20 a a (a+20)
   pen 0
   line 20 a a 80  
}

Let two lines fly in cooperative styles.
 
Part 9
p9.dbn 
//chris:  your line is pretty symmetrical,
//even though it's tilted off of its axis...
//maybe you could try keeping the same
//angle while offsetting it a bit
//
//orig:
//paper 80
//pen 18
//line 85 25 15 55
paper 80
pen 18

line 36 40 15 46

Using Part 1 of Problem Set 1, you are asked to comment and improve on a colleague's work. The person you will choose is determined by your order in the pulldown menu of the main page. For example, Ben should comment on Bruce, Bruce on Nick, and all the way down to Hoeteck commenting on Ben (wrapped around). We don't have a form mechanism setup, so for now just put it inside your DBN buffer as a comment, and include a modified version of your colleague's program that reflects your suggestions.
 
Part 10
p10.dbn 
//chris:
//the flat bottom on the object suggests
//2 dimensions even though the shading
//says otherwise.  not quite sure whether
//it's supposed to be rectangular...maybe 
//you could render the right side with 2 
//triangles instead of one so that the 
//perspective looks more realistic.
//orig:
//paper 90
//repeat x 20 50
//{
//   pen x
//   line x 5 x 50
//}
//repeat x 50 80
//{
//   pen x
//   line x 5 50 x
//}
//repeat a 20 50
//{
//  pen a
//   line 50 80 a 50
//}
//jocelyn's mod code:
//rectangle
repeat x 20 50
{
   pen x
   line x 5 x 50
}
//top triangle
repeat a 20 50
{
   pen a
   line 50 80 a 50
}
//side triangle
repeat x 50 79
{
   pen (x+5)
   line x (x-45) x (130-x)
}

Do the same as above for Part 10 of Problem Set 1.