Access Current viewport information from C Api?

Developers SketchUp SDK
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1

Hi!

I’m working on a exporter using the C API and I wonder if it’s possible to get the camera information of the “viewport” (that’s it the camera being used by the user while moving around and editing the model).

I only found structs and functions for scene cameras, but that’s not really what I wanted.

Is this possible or not currently supported?

Cheers

2

Didn’t check but did you tried SUModelGetCamera

1 Like
3

Hi, yes, but it comes up null, it seems it’s only used for Scene cameras, not the viewport one

4

An exporter from the SketchUp process? …
Or an exporter from another application to write out a SKP file?

Perhaps this is only valid from within the SketchUp application using the C API in “live” mode when you get the model from SUApplicationGetActiveModel() ?

Or maybe, it is NULL when the model has scene pages. I.e., when a model has no scene pages, then perhaps the model itself stores a camera object.

But, there is no need for the model to store a camera, if the model has scenes, because SUModelGetActiveScene will have the edit camera.

So, first check SUModelGetNumScenes() and if 0 then get the model’s camera, if > 0, then get the active scene’s camera.

EDIT: After a night’s rest and a cup of coffee, I remembered that the scene pages can be set to not save camera position, so my musing (above) is not likely true.

5

Hi, did some basic tests, works as expected for both (LiveCAPI and standalone importer):
SU2025

	SUCameraRef camera_ref = SU_INVALID;
	if (SUModelGetCamera(model_ref, &camera_ref) == SU_ERROR_NONE && SUIsValid(camera_ref))
	{
		bool is_perspective = true;
		SUVector3D direction;
		double fov;

		SUCameraGetPerspective(camera_ref, &is_perspective);
		SUCameraGetDirection(camera_ref, &direction);
		SUCameraGetPerspectiveFrustumFOV(camera_ref, &fov);


		LogPrint(L"Camera is valid, persperspective(%d) fov(%0.00f) dir(%0.00f x %0.00f x %0.00f)", 
			is_perspective, fov, direction.x, direction.y, direction.z
		);
	}
	else
	{
		LogPrint(L"no camera");
	}
1 Like
6

thanks this worked as expected

7

So, what was it that prevented you from getting a valid camera?