Week - 5 - Checking and correcting the Normals

AIM:

• Write a code to display normal as explained in Lecture 5
• Create a widget containing two buttons for “reverse normals” and “normal off”
• Also assign these procedures to keyboard buttons of your choice.
• check the null case also

OBJECTIVE:

To write a code to display normals of the elements and two buttons to reverse the normals as well as turn off normals display.

CODE:

*setnormalsdisplaytype 1
*createmark elements 1 "displayed"
*normalsdisplay elements 1
*clearmark elems 1
proc x {} {
*createmarkpanel elems 1
set ::b [hm_getmark elems 1]
}
proc y {} {
if {$::b == {} } {
set popup [tk_messageBox -message "No elements were selected"]
} else {
eval *createmark elems 1 $::b
*normalsreverse elems 1
*createmark elements 1 "displayed"
*normalsdisplay elements 1
}
}
hm_framework removetab "Normals"
set a .normal
hm_framework addtab "NORMALS" [frame $a]
button $a.01 -text "ELEMENTS" -command x
place $a.01 -x 10 -y 10 -width 120 -height 20
button $a.02 -text "NORMAL OFF" -command {*normalsoff}
place $a.02 -x 130 -y 10 -width 120 -height 20
button $a.03 -text "REVERSE NORMAL" -command y
place $a.03 -x 260 -y 10 -width 120 -height 20

PROCEDURE:

• *setnormalsdisplaytpeis used to display the type of visualization whether with direction of normal (0) or color(1)
• Then the elements displayed in were selected using *createmarkcommand.
• Normals were displayed for the selected element with color representation using*normalsdisplay elems.
• Functions were created for the reversing the normals and select the elements using proc and these functions are called by assigning the respective buttons.
• To reverse the normals of the selected elements *normalsreverse command is used.
• hm_framework is used to create a separate tab.

OUTPUT:

RESULTS:

• A code is written to display Widget has created which contains two buttons for "reverse normal & off".