New features



New Features (largely untested)

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version3g7 with autoderive user-defined methods

2006.12.04 (Draft)

1. At the time of Autoderive operation, the following user-defined function can be run with no argment.

nt_autoderive_init_method ; this runs only once when a user starts autoderive

nt_autoderive_reset_method ; this runs at the beginning of each autoderive cycle

nt_autoderive_cancel_method ; this runs right after the user cancels autoderive in interactive mode

For example,

(defun nt_autoderive_init_method ()

(print “init”)

(setq current-step step))

(defun nt_autoderive_reset_method ()

(print “reset”)

(setq step current-step))

(defun nt_autoderive_cancel_method ()

(print “cancel”)

(setq step current-step))

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version3g6 with collision detection tools

2006.05.04 (Draft)

1. assignment of test_function for nt_def_trans

2. nt_visible_literal_geometries returns a list of all the visible NITROS entities

Quick explanation follows.

(nt_def_trans

'("tn1_dome")

"tn1_lantern"

'(tn1_dome2lantern tn1_dome2lantern_test_func)

; if the above is a list, the first element is the usual transformation function

; and the second element is the name of the test function

; The second function needs to take the same set of parameters as the first function.

; It should return T or nil. If it returns nil, the

; test signals failure and the transformation will be excluded from the list

; when a user double-click on a shape. Also, it will be excluded when

; auto-derive processes the derivation. See the example below.

nil ; keep this nil as before, please!

'add

)

(defun tn1_dome2lantern_test_func (dome_list trans_plist / dome ent1 ent1_plist dome_plist)

(setq dome (car dome_list))

(setq dome_plist (nt_plist dome))

; Do some collision detection calucation here and return t-or-nil in the end.

;

; To access the parameter values of the dome, do something like

; (nt_val "xo" dome_plist)

; (nt_val "radius" dome_plist)

;

; If you need to access visible objects in the drawing, the following function returns the list of all visible objects.

; It includes the NITROS generated ones only.

; (nt_visible_literal_geometries)

;

; Further more, you can access the parameter values of these geometry. For instance, I get the first entity from the list.

; (setq ent1 (car (nt_visible_literal_geometries)))

; Then, extract its parameter list.

; (setq ent1_plist (nt_plist ent1))

; Then, extract its parameter values.

; (nt_val "xo" ent1_plist)

; (nt_val "radius" ent1_plist)

;

; If you want to know the type of the entity, this returns it.

; (nt_type ent1)

;

; At the end, make sure to return t-or-nil where nil signals the failure of the test and transformation is prevented.

)

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