# Creation of 2d drawing

#Category: Modeling
#Title: Snowflake - creation of 2d drawing

pload MODELING AISV

puts "Generating sample drawing of snowflake..."

# make circular elements
circle c11 5 5 0 5
circle c12 5 5 0 3
circle c21 18 7 0 7
circle c22 18 7 0 5
circle c31 28.5 5 0 5
circle c32 28.5 5 0 3
trim c21 c21 pi/4 -pi/4
trim c22 c22 pi/4 -pi/4
trim c31 c31 pi/4 -pi/4
trim c32 c32 pi/4 -pi/4
line l21 18 7 0 1 1 0
line l22 18 7 0 1 -1 0
line l31 28.5 5 0 1 1 0
line l32 28.5 5 0 1 -1 0
trim l21 l21 5 7
trim l22 l22 5 7
trim l31 l31 3 5
trim l32 l32 3 5
line l1 -6 0 0 0.86602540378443864 0.5 0
line l2 -6 1 0 1 0 0
trim l1 l1 0 30
trim l2 l2 0 45
mkedge c11 c11
mkedge c12 c12
mkedge c21 c21
mkedge c22 c22
mkedge c31 c31
mkedge c32 c32
mkedge l21 l21
mkedge l22 l22
mkedge l31 l31
mkedge l32 l32
mkedge l1 l1
mkedge l2 l2
wire b11 c11
wire b12 c12
orientation b12 R

# build one ray
plane p -6 0 0 0 0 1
mkface f1 p b11
add b12 f1
wire b2 c21 l21 c22 l22
mkface f2 p b2
wire b3 c31 l31 c32 l32
mkface f3 p b3
prism f5 l1 -5 8.6602540378443864 0
prism f4 l2 0 -1 0
compound f1 f2 f3 bc
bfuse r bc f4
explode r Sh
renamevar r_1 r
bcut r r f5
explode r Sh
renamevar r_1 r
explode r e
wire w r_4 r_1 r_7 r_8 r_9 r_10 r_11 r_12 r_13 r_14 r_22 r_23 r_24 r_25 r_19 r_20 r_21 r_26 r_35 r_31 r_32 r_33 r_34 r_36 r_37
tcopy w w1
tmirror w1 -6 0 0 0 1 0
wire w w w1
mkface w p w
donly w

# construct complete snowflake
tcopy w w1
tcopy w w2
tcopy w w3
tcopy w w4
tcopy w w5
trotate w1 -6 0 0 0 0 1 60
trotate w2 -6 0 0 0 0 1 120
trotate w3 -6 0 0 0 0 1 180
trotate w4 -6 0 0 0 0 1 240
trotate w5 -6 0 0 0 0 1 300
bfuse w w w1
bfuse w w w2
bfuse w w w3
bfuse w w w4
bfuse w w w5
unifysamedom r w

# keep only wires in compound
eval compound [explode r w] snowflake
tscale snowflake -6 0 0 1.5

# draw frame loosely following GOST 2.104-68
polyline frame -100 -100 0 172 -100 0 172 100 0 -100 100 0 -100 -100 0
polyline t1 52 -100 0 52 -45 0 172 -45 0
polyline t2 52 -60 0 172 -60 0
polyline t3 52 -85  0 172 -85 0
polyline t4 122 -100 0 122 -60 0
polyline t5 122 -80 0 172 -80 0
polyline t6 122 -65 0 172 -65 0
polyline t7 142 -80 0 142 -85 0
polyline t8 137 -80 0 137 -60 0
polyline t9 154 -80 0 154 -60 0
compound frame t1 t2 t3 t4 t5 t6 t7 t8 t9 lines

# add text
text2brep sample "SAMPLE" Arial 10 x=90 y=-55 bolditalic
text2brep occ "Open CASCADE" Times 6 x=125 y=-95 
text2brep name "Snowflake" Courier 7 x=65 y=-75 italic
text2brep material "Ice" Courier 7 x=75 y=-95 italic
text2brep sheets "Sheets 1" Courier 3.5 x=145 y=-83 italic
text2brep scale "Scale\n\n1:100" Courier 3.5 x=157 y=-63 italic
text2brep mass "Mass\n\n1 mg" Courier 3.5 x=140 y=-63 italic
eval compound [explode sample w] sample
eval compound [explode occ w] occ
eval compound [explode name w] name
eval compound [explode material w] material
eval compound [explode sheets w] sheets
eval compound [explode scale w] scale
eval compound [explode mass w] mass
compound sample occ name material sheets scale mass text

compound snowflake lines text drawing

# display in 3d view
vinit Driver1/Viewer1/View1 w=1024 h=768
vdisplay snowflake lines text
vsetcolor snowflake 0 0 0 
vsetcolor lines 0 0 0 
vsetcolor text 0 0 0 
vsetcolorbg 255 255 255
vtop
vfit

# add dimension
explode snowflake v
vdimension length -length -shapes snowflake_93 snowflake_15 -plane xoy -value 0.001 -dispunits mm -showunits -flyout 70 -label above -color black -text 5 3d sh

if { [regexp HAVE_GL2PS [dversion]] } {
    puts "You can use command vexport to generate PDF: vexport your_file_path.pdf"
}