C++/BMX question

BlitzMax Forums/BlitzMax Programming/C++/BMX question

JoshK

(Posted 2012) [#1]

This is my C++ function. I call this from BlitzMax and my C++ library fills in the pick values, if something is picked:

		int EntityRaycast(Leadwerks3D::Entity* entity, float x0, float y0, float z0, float x1, float y1, float z1, float* pick, float radius, int closest, int recursive)
		{
			Leadwerks3D::Pick p;
			bool result;
			
			result = entity->Raycast(Leadwerks3D::Vec3(x0,y0,z0),Leadwerks3D::Vec3(x1,y1,z1),p,radius,closest,recursive);
			if (result)
			{
				pick[0] = p.position.x;
				pick[1] = p.position.y;
				pick[2] = p.position.z;
				pick[3] = p.normal.x;
				pick[4] = p.normal.y;
				pick[5] = p.normal.z;
				memcpy(&pick[6],&p.entity,4);
				memcpy(&pick[7],&p.surface,4);
				memcpy(&pick[8],&p.face,4);
				memcpy(&pick[9],&p.triangle,4);
			}
			return result;
		}

This is the raycast/pick structure in C++:

	class Pick
	{
	public:
		Vec3 position;
		Vec3 normal;
		Entity* entity;
		Surface* surface;
		Face* face;
		int triangle;
	};

This is the structure in BlitzMax:

Type TRaycast
	Field x:Float,y:Float,z:Float
	Field nx:Float,ny:Float,nz:Float
	Field entity:LEEntity
	Field surface:LESurface
	Field face:LEFace
	Field triangle:Int
EndType

Am I doing this right? I suspect I am causing memory overwrite errors.

Last edited 2012

JoshK

(Posted 2012) [#2]

Bah, I was passing a NULL BMX object to the function. X\

It works fine now.