topic Re: Projected Area and Legacy Settings in Archicad C++ API

Projected Area and Legacy Settings

stefan — Thu, 13 Jul 2023 13:00:08 GMT

When you collect the quantities of composite layers from Walls, using ACAPI_Element_GetSurfaceQuantities you can get the Projected Area/Exposed Surface from the API.

However, I noticed that if you have a project where the option "Use Legacy intersection and Surface methods for model elements" is enabled for your project, the exposed surface stays ZERO.

Is this a bug? Or a limitation? I did not read it in the documentation.

Re: Projected Area and Legacy Settings

Akos Somorjai — Wed, 20 Jan 2016 08:38:57 GMT

stefan wrote:
When you collect the quantities of composite layers from Walls, using ACAPI_Element_GetSurfaceQuantities you can get the Projected Area/Exposed Surface from the API.

However, I noticed that if you have a project where the option "Use Legacy intersection and Surface methods for model elements" is enabled for your project, the exposed surface stays ZERO.

Is this a bug? Or a limitation? I did not read it in the documentation.

Hi Stefan,

The special 3D model we use to calculate the exposed areas cannot be created in legacy mode, so you'll always get 0 area.

Best, Akos

Re: Projected Area and Legacy Settings

ReignBough — Thu, 30 Jun 2016 07:23:10 GMT

How to use this ACAPI_Element_GetSurfaceQuantities? Not in documentation but based on its definition, it accepts list/array of GUID of elements and cover elements, and returns list of element surface quantities.

I have the following code (snippet):

td_GuidArr elemList;
td_GuidArr coverList;

//... other element types to be considered as "cover"
ACAPI_Element_GetElemList(API_ColumnID, &elemList);
coverList.Push(elemList);
elemList.Clear();
ACAPI_Element_GetElemList(API_WallID, &elemList);
// no need to clear since we'll get wall "exposed" surface area

GS::Array<API_ElemPartSurfaceQuantity> qs;
ACAPI_Element_GetSurfaceQuantities(&elemList, &coverList, &qs);
// print each element's exposed area

What I get is simply the whole surface area, and the covered areas are not deducted.

EDIT:
td_GuidArr = GS::Array<API_Guid>

Re: Projected Area and Legacy Settings

ReignBough — Wed, 19 Oct 2016 06:10:25 GMT

Here is a sample of a column "touching" a wall and the results of Scheme Settings and ACAPI_Element_GetSurfaceQuantities().

EDIT

BTW, this function is working fine if the elements intersect each other.

Re: Projected Area and Legacy Settings

ReignBough — Fri, 21 Jul 2017 11:52:30 GMT

Here's another problem on "Exposed Area" using API.