Again need short example of array byref.

[DJLinux]

I know how i can return from Basic4GL plugin an array as result

dim Array(1024)
Array=DoAnythingWithArray()

but how looks the Basic4GL plugin code for ?
DoAnythingWithArray(TheArray)

Thanx Joshy

[Tom Mulgrew]

I wrote these quickly, before work. Haven't tested them yet.
This is an example of how it's done.

void DLLFUNC Func_AddUpArray(IDLL_Basic4GL_Runtime &basic4gl) {	
	
	// Get array size
	int count = basic4gl.GetArrayParamDimension(1, 0);

	// Allocate array
	int *array = new int[count];

	// Read array from parameter
	basic4gl.SetType(DLL_BASIC4GL_EXT_INT);
	basic4gl.ModTypeArray(1, count);
	//basic4gl.ModTypeReference();		// Not required, because ModTypeArray does this automatically
	basic4gl.GetParam(1, array);
	
	// Sum up array
	int sum = 0;
	for (int i = 0; i < count; i++) 
		sum += array;
		
	// Return sum as integer
	basic4gl.SetType(DLL_BASIC4GL_EXT_INT);
	basic4gl.SetReturnValue(& sum);

	// Free array space
	delete[] array;
}

void DLLFUNC Func_ReverseArray(IDLL_Basic4GL_Runtime &basic4gl) {	

	// Get array size
	int count = basic4gl.GetArrayParamDimension(1, 0);

	// Allocate array
	int *array = new int[count];
	int *dest = new int[count];
	
	// Read array from parameter
	basic4gl.SetType(DLL_BASIC4GL_EXT_INT);
	basic4gl.ModTypeArray(1, count);
	//basic4gl.ModTypeReference();		// Not required, because ModTypeArray does this automatically
	basic4gl.GetParam(1, array);

	// Reverse array into dest
	for (int i = 0; i < count; i++)
		dest = array[count - i - 1];
		
	// Copy array back to parameter
	basic4gl.SetParam(1, dest);
	
	// Free array space
	delete[] array;
	delete[] dest;
}

(I had to put a space between & and "sum", otherwise it displays as &sum on this board)

[DJLinux]

thanx Joshy

[Empyrion Martyr]

i found out that b4gel crashes if you declare an array inside on your plugin functions and do not delete[] inside the same function. I needed to allocate a matrix for the whole life of an instance of a program but apparently returning from a function will give an exception if memory is not cleaned. One solution I can come up with is declaring the matrix inside b4gel and using the plugin to access the stack and the individual elements of the matrix/array, and work directly with them instead of creating a copy. (oops, gotta rewrite my plugin funcs then )