[SOLVED] Clicking Events on Terrain (and other nodes)

[Paul.Brodin]

Hi Forum

Not sure where to start on this one.

 

I am building a new toolbar to aid productivity in building worlds, one of the processes is a quick 'Add Node' that will repeatedly add a particular node, with particular scale and rotation parameters,  at the location on the terrain that the user clicks on.

 

I cant seem to find where to begin on this?

 

I was expecting to be able to add a click event to the terrain node, but that may not be how it works

 

Any pointers, once again, appreciated.

 

Paul

[unclebob]

Hey Paul,

 

Basically, there're no callbacks for mouse in Terrain, so you need to to do some simple steps:

 

1) Convert mouse coordinates to world mouse direction, we have a Unigine::getPlayerMouseDirection function in UnigineScript located in core/scripts/utils.h file which will do the job for you;

2) Do a raycast by caling engine.word.getIntersection (https://developer.unigine.com/en/docs/1.0/scripting/library/engine/engine.world#engine.world.getIntersection_vec3_vec3_int_variable, UnigineScript) or World::getIntersection (https://developer.unigine.com/en/docs/1.0/cpp_api/reference/api_world_class#c_getIntersection_constUNIGINE_VEC3n_constUNIGINE_VEC3n_int_UNIGINE_VEC3m_vec3m_vec4m_intm_intm, C++) and feeding it with the direction calculated on first step and current camera position;

3) If the hit was successful then you can get the intersection point and spawn your node.