Users can write any valid Python expression (that evals to an int or float) inside Blender's gui number buttons (preceded by #) and have them evaluated to their actual int or float value.
Button Evaluation has access to the same modules as PyDrivers.
For example:
#1.0*9-2.3
#ob("Camera").LocZ
#1.0/ob("Cube").LocX
#math.sin(math.pi) -- or simply #m.sin(m.pi)
etc
		
	
		
			
				
	
	
		
			109 lines
		
	
	
		
			3.9 KiB
		
	
	
	
		
			C++
		
	
	
	
	
	
			
		
		
	
	
			109 lines
		
	
	
		
			3.9 KiB
		
	
	
	
		
			C++
		
	
	
	
	
	
| /*
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|  * $Id$
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|  *
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|  * ***** BEGIN GPL/BL DUAL LICENSE BLOCK *****
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|  *
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|  * This program is free software; you can redistribute it and/or
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|  * modify it under the terms of the GNU General Public License
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|  * as published by the Free Software Foundation; either version 2
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|  * of the License, or (at your option) any later version. The Blender
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|  * Foundation also sells licenses for use in proprietary software under
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|  * the Blender License.  See http://www.blender.org/BL/ for information
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|  * about this.
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|  *
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|  * This program is distributed in the hope that it will be useful,
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|  * but WITHOUT ANY WARRANTY; without even the implied warranty of
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|  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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|  * GNU General Public License for more details.
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|  *
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|  * You should have received a copy of the GNU General Public License
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|  * along with this program; if not, write to the Free Software Foundation,
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|  * Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
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|  *
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|  * The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
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|  * All rights reserved.
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|  *
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|  * The Original Code was in: source/blender/bpython/include/BPY_extern.h
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|  *
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|  * Contributor(s): Michel Selten, Willian P. Germano, Chris Keith
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|  *
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|  * ***** END GPL/BL DUAL LICENSE BLOCK *****
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|  */
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| 
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| #ifndef BPY_EXTERN_H
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| #define BPY_EXTERN_H
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| 
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| extern char bprogname[];	/* holds a copy of argv[0], from creator.c */
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| 
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| struct Text; /* defined in DNA_text_types.h */
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| struct ID; /* DNA_ID.h */
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| struct Object; /* DNA_object_types.h */
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| struct IpoDriver; /* DNA_curve_types.h */
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| struct ScriptLink; /* DNA_scriptlink_types.h */
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| struct ListBase; /* DNA_listBase.h */
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| struct SpaceText; /* DNA_space_types.h */
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| struct SpaceScript; /* DNA_space_types.h */
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| struct Script; /* BPI_script.h */
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| struct ScrArea; /* DNA_screen_types.h */
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| struct bScreen; /* DNA_screen_types.h */
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| 
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| #ifdef __cplusplus
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| extern "C" {
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| #endif
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| 
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| 	void BPY_start_python( int argc, char **argv );
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| 	void BPY_end_python( void );
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| 	void BPY_post_start_python( void );
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| 	void init_syspath( int first_time );
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| 	void syspath_append( char *dir );
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| 
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| 	int BPY_Err_getLinenumber( void );
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| 	const char *BPY_Err_getFilename( void );
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| 
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| 	int BPY_txt_do_python_Text( struct Text *text );
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| 	int BPY_menu_do_python( short menutype, int event );
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| 	void BPY_run_python_script( char *filename );
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| 	void BPY_free_compiled_text( struct Text *text );
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| 
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| 	void BPY_clear_bad_scriptlinks( struct Text *byebye );
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| 	int BPY_has_onload_script( void );
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| 	void BPY_do_all_scripts( short event );
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| 	int BPY_check_all_scriptlinks( struct Text *text );
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| 	void BPY_do_pyscript( struct ID *id, short event );
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| 	void BPY_free_scriptlink( struct ScriptLink *slink );
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| 	void BPY_copy_scriptlink( struct ScriptLink *scriptlink );
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| 
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| 	int BPY_is_spacehandler(struct Text *text, char spacetype);
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| 	int BPY_del_spacehandler(struct Text *text, struct ScrArea *sa);
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| 	int BPY_add_spacehandler(struct Text *txt, struct ScrArea *sa,char spacetype);
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| 	int BPY_has_spacehandler(struct Text *text, struct ScrArea *sa);
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| 	void BPY_screen_free_spacehandlers(struct bScreen *sc);
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| 	int BPY_do_spacehandlers(struct ScrArea *sa, unsigned short event,
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| 		unsigned short space_event);
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| 
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| 	void BPY_pydriver_update(void);
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| 	float BPY_pydriver_eval(struct IpoDriver *driver);
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| 	struct Object **BPY_pydriver_get_objects(struct IpoDriver *driver);
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| 
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| 	int BPY_button_eval(char *expr, double *value);
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| 
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| /* format importer hook */
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| 	int BPY_call_importloader( char *name );
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| 
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| 	void BPY_spacescript_do_pywin_draw( struct SpaceScript *sc );
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| 	void BPY_spacescript_do_pywin_event( struct SpaceScript *sc,
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| 					     unsigned short event, short val, char ascii );
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| 	void BPY_clear_script( struct Script *script );
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| 	void BPY_free_finished_script( struct Script *script );
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| 
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| /* void BPY_Err_Handle(struct Text *text); */
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| /* void BPY_clear_bad_scriptlink(struct ID *id, struct Text *byebye); */
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| /* void BPY_clear_bad_scriptlist(struct ListBase *, struct Text *byebye); */
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| /* int BPY_spacetext_is_pywin(struct SpaceText *st); */
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| 
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| #ifdef __cplusplus
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| }				/* extern "C" */
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| #endif
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| 
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| #endif  /* BPY_EXTERN_H */
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