[SOLVED] Unigine Sim C++ API coordinates

[sergey.pozhidaev]

Добрый день!

 

Такая проблема: работаем с Sim версией движка, нужно в плагине получать BoundBox и BoundFrustum, но все их функции принимают vec3, а не dvec3. Какие могут быть варианты решения?

 

Спасибо.

 

Hello.

 

I have a problem: I use Sim version of engine and I need to get BoundBox and BoundFrustum in plugin, but all functions of those classes accepts vec3 parameters instead of dvec3. How I can solve this problem?

 

Thanks.

[unclebob]

Hello, Sergey!

 

Sorry for late reply.

 

There is a couple of ways you can get bounds in double precision:

 

1) Get local bounds in float via getBoundBox/Sphere/Frustum call, get node world matrix in double precition and transform local bounds properly;

2) Get world bounds in double via getWorldBoundBox/Sphere/Frustum call.

[sergey.pozhidaev]

Thank You!

And I have another problem: I need to add vertex to ObjectMeshDynamic in plugin, I get dvec3 vertex from my function, but addVertex accepts only vec3.

[ulf.schroeter]

Mesh vertices cannot be specified in double precision as the underlying API's only support float. Therfore you have to cast double to float,

[unclebob]

Mesh vertices are stored in local coordinates and float only as they transfered to the GPU. If you want to add a world vertex to ObjectMeshDynamic then you need to transform world vertex coorditantes to local and then convert double to float (might be huge troubles with precision during this step).