Bruce Chang - Problem Set #1
 
Part 1
p1.dbn 
paper 0
pen 100

line 20 10 80 90

Create a program to draw a carefully chosen one line on a paper of your choice.
 
Part 2
p2.dbn 
paper 0
pen 100


//3 images generated by setting x=0,-3,7
set x 7

//mouth
line (30+x) 30 (70-x) 30

//right eye
line (40-x/2) (70-x/2) (40+x/2) (60+x/2)

//left eye
line (60+x/2) (70-x/2) (60-x/2) (60+x/2)


//Many facial expressions are generated 
//by controlling one variable.  Give me
//more lines and more variables :)

Create a program that uses one variable as a means to control a set of 3 lines. Capture 3 instances of the graphic (A,B,C).
 
Part 3
p3.dbn 
paper 0

repeat y 30 80

{
   pen (y*2-50)
   line (y-10) y y (y-10) 
}

//assumed "single filled triangle" to be
//"1 filled triangle" and not
//"solid-color triangle"

Create a program to draw a single filled rectangle. Again, choose carefully.
 
Part 4
p4.dbn 
paper 0

set x 10
set z 90

repeat y 30 70
{
   pen z
   line x y z y
   set x (x+1)
   set z (z-1)
}

//assumed "single filled triangle" to be
//"1 filled triangle" and not
//"solid-color triangle"

//shaded isosceles

Create a program to draw a single filled triangle. Use your good judgement.
 
Part 5
p5.dbn 
paper 0

repeat y 40 (-6)
{
   pen (y+30)
   line 5 40 (55+y) (y+40)
}

//assumed "single filled triangle" to be
//"1 filled triangle" and not
//"solid-color triangle"

//shaded scalene with no edge parallel to
//image boundary

Think of all the ways you can draw a filled triangle, and choose one. Utilize the properties of the drawing method you choose, to create a single filled triangle.
 
Part 6
p6.dbn 
Paper 100

set [50 53] 0
set [47 51] 0
set [53 51] 0
set [48 48] 0
set [52 48] 0

//possible emotions:
//focused
//reserved/shy
//"pent"-up anger

Set 5 dots on a paper of your choice. Evoke an emotion with your choice in placement of dots.
 
Part 7
p7.dbn 
Paper 100

repeat v 1 10
{
   set [(v*3+20) (v*10)] 20
}
repeat w 1 10
{
   set [(w*(-3)+80) (w*10)] 20
}
repeat x 1 10
{
   set [(x*(-13)+80) (x*11)] 20
}
repeat y 1 10
{
   set [(y*11-9) 66] 20
}
repeat z 1 10
{
   set [(z*13+20) (z*11)] 20
}

//Frustrated because I can't use floats.
//otherwise, I could get more dots per
//line segment.

Create a representational picture (i.e. something that looks like something) using just 8 (at maximum) dotted lines.
 
Part 8
p8.dbn 
repeat x 0 100
{
   repeat y 0 100
   {
      set [x y] ((x-50)*(x-50)/8+(y-50)*(y-50)/16)
   }
}

//nested loop that covers all 100^2 pixels
//and generates a shaded ellipse

Using a nested loop, fill the entire field with the value of some calculation that can be appreciated. Do not use the Line command.
 
Part 9
p9.dbn 
Paper 75
repeat x 0 50
{
   repeat y 0 50
   {
      set [(x*x/16) (y*y/8-x)] ((x*x/32)+(y*y/12))
   }
}

//bi-directional exponential growth and
//bi-directional gradient

Using a nested loop, create a stippled pattern of dots that can be enjoyed for its complexity. Do not use the Line command.
 
Part 10
p10.dbn 
paper 100
repeat x 0 10
{
   repeat y 0 50
   {
      pen (x+4*y/3)
      line (x*30) 0 (y+2*x) 100
   }
}

//pages of a book (w/o text) :)

Using the Line command, and a (few) nested loop, create an image that evokes a three-dimensional feeling through shading.