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Diffstat (limited to 'externals/grill/flext/tutorial/attr2/main.cpp')
| -rw-r--r-- | externals/grill/flext/tutorial/attr2/main.cpp | 195 |
1 files changed, 0 insertions, 195 deletions
diff --git a/externals/grill/flext/tutorial/attr2/main.cpp b/externals/grill/flext/tutorial/attr2/main.cpp deleted file mode 100644 index fe61f6da..00000000 --- a/externals/grill/flext/tutorial/attr2/main.cpp +++ /dev/null @@ -1,195 +0,0 @@ -/* -flext tutorial - attributes 2 - -Copyright (c) 2002,2003 Thomas Grill (xovo@gmx.net) -For information on usage and redistribution, and for a DISCLAIMER OF ALL -WARRANTIES, see the file, "license.txt," in this distribution. - -------------------------------------------------------------------------- - -This is an example of an object doing various float operations. - -Methods and attributes are registered at class level (opposed to object level in example "attr1"). -For details, see also example "adv2" - -*/ - - -// IMPORTANT: enable attribute processing (specify before inclusion of flext headers!) -// For clarity, this is done here, but you'd better specify it as a compiler definition -// FLEXT_ATTRIBUTES must be 0 or 1, -#define FLEXT_ATTRIBUTES 1 - - -// include flext header -#include <flext.h> - -// check for appropriate flext version -#if !defined(FLEXT_VERSION) || (FLEXT_VERSION < 401) -#error You need at least flext version 0.4.1 -#endif - -#include <math.h> - - -class attr2: - public flext_base -{ - // compulsory flext header with a class setup function - FLEXT_HEADER_S(attr2,flext_base,setup) - -public: - // constructor - attr2(); - -protected: - void m_trigger(float f); - - // stored argument of operation - float arg; - - // stored result - float res; - - enum operation { - op_set,op_add,op_sub,op_mul,op_div,op_pow - } op; - - static const t_symbol *sym_set,*sym_add,*sym_sub,*sym_div,*sym_mul,*sym_pow; - -private: - - static void setup(t_classid); - - // callback for method "m_trigger" (with one float argument) - FLEXT_CALLBACK_F(m_trigger) - - // define attribute callbacks for variable "arg" ("ATTRVAR" means GET and SET) - FLEXT_ATTRVAR_F(arg) - - // define attribute callbacks for variable "res" (GET only) - FLEXT_ATTRGET_F(res) - - // methods for getting/setting the operation mode - void opget(const t_symbol *&s) const; - void opset(const t_symbol *&s); - - // define attribute callbacks for variable "res" (GET only) - FLEXT_CALLGET_S(opget) - FLEXT_CALLSET_S(opset) -}; - -// instantiate the class -FLEXT_NEW("attr2",attr2) - - -// instantiate static variables -const t_symbol - *attr2::sym_set, - *attr2::sym_add,*attr2::sym_sub, - *attr2::sym_div,*attr2::sym_mul, - *attr2::sym_pow; - -void attr2::setup(t_classid c) -{ - // Upon class creation setup some symbols - // This is done only upon creation of of the first "attr2" object - sym_set = MakeSymbol("="); - sym_add = MakeSymbol("+"); - sym_sub = MakeSymbol("-"); - sym_mul = MakeSymbol("*"); - sym_div = MakeSymbol("/"); - sym_pow = MakeSymbol("**"); - - - // setup methods and attributes at class scope - - // register method (for floats) "m_trigger" for inlet 0 - FLEXT_CADDMETHOD(c,0,m_trigger); - - // register attribute "arg" with the variable "arg" - FLEXT_CADDATTR_VAR1(c,"arg",arg); - - // register attribute "result" with variable "res" - FLEXT_CADDATTR_GET(c,"result",res); - - // register attribute "op" with methods "opget" and "opset" - FLEXT_CADDATTR_VAR(c,"op",opget,opset); -} - - -attr2::attr2(): - arg(0),res(0), // initialize argument and result - op(op_set) // initialize operation -{ - // define inlets - AddInAnything(); // first inlet of type anything (index 0) - - // define outlets - AddOutFloat(); // one float outlet (has index 0) -} - -// receive an operand, do the math operation and trigger the output -void attr2::m_trigger(float f) -{ - switch(op) { - case op_set: res = f; break; - case op_add: res = f+arg; break; - case op_sub: res = f-arg; break; - case op_mul: res = f*arg; break; - case op_div: - if(arg) res = f/arg; - else { - post("%s - argument to division is 0: result set to 0",thisName()); - res = 0; - } - break; - case op_pow: res = (float)pow(f,arg); break; -#ifdef FLEXT_DEBUG - default: ERRINTERNAL(); // operation not defined -#endif - } - - // output value to outlet - ToOutFloat(0,res); // (0 stands for the outlet index 0) -} - - -// report the operation mode -void attr2::opget(const t_symbol *&s) const -{ - - switch(op) { - case op_set: s = sym_set; break; - case op_add: s = sym_add; break; - case op_sub: s = sym_sub; break; - case op_mul: s = sym_mul; break; - case op_div: s = sym_div; break; - case op_pow: s = sym_pow; break; -#ifdef FLEXT_DEBUG - default: ERRINTERNAL(); // operation not defined -#endif - } -} - -// set the operation mode -void attr2::opset(const t_symbol *&s) -{ - if(s == sym_set) - op = op_set; - else if(s == sym_add) - op = op_add; - else if(s == sym_sub) - op = op_sub; - else if(s == sym_mul) - op = op_mul; - else if(s == sym_div) - op = op_div; - else if(s == sym_pow) - op = op_pow; - else { - post("%s - operation is not defined, set to =",thisName()); - op = op_set; - } -} - |