how to access a struct?

[haggi]

I have defined a struct in my shader declaration:

declare shader
	color	"colTest" (
		array struct "colStruct" {
			color	"color"
		}
	)
	version 1
	apply material
end declare

In my shder I try to access it with the usual array approach:


str

uct colStruct{
	miColor color;
};

struct colTest_p{

	int		i_color;
	int		n_color;	
	miTag	col[1];	

};


miBoolean colTest(
	miColor                *result,
	miState                 *state,
	colTest_p   *paras)
{
	int n_color   = *mi_eval_integer(&paras->n_color);
	int i_color   = *mi_eval_integer(&paras->i_color);
	miTag *colTag  =  mi_eval_tag(paras->col) + i_color;

	int n;
	for &#40;n=0; n < n_color; n++, colTag++&#41; 
	&#123;
		mi_info&#40;"ColTagP %d colTag %d", colTag, *colTag&#41;;
		if&#40;*colTag&#41;
		&#123;
			colStruct *colS = &#40;colStruct *&#41; mi_db_access&#40; *colTag &#41;;
			mi_db_unpin&#40;*colTag&#41;;
			
			mi_info&#40;" colS %f ", colS->color&#46;r &#41;;
		&#125;
	&#125;
	return miTRUE;
&#125;

----------------

Unfortunalty it doesnt work.
It seems that the pointer *colTag contains a null tag.

Any tips?

[jayb]

struct colStruct{
miColor color;
};

struct colTest_p{

int i_color;
int n_color;
struct colStruct col[1];
};