PhysicsIntersection with terrain

[dongju.jeong]

PhysicsIntersectionPtr intersection = PhysicsIntersection::create();
	// get an intersection
	Vec3 p1 = node->getWorldPosition();
	
	ter->setForceIntersection(1);
	ObjectPtr object = Physics::get()->getIntersection(lastPos,
		p1, 0x00000001,intersection);
	ter->setForceIntersection(0);

	NodePtr contactNode;
 
	if (object)
	{
      ...
    }
	lastPos = p1;

Sometimes contact with the terrain fails.

Is it because I didn't use worldIntersecion instead? Or is it due to the terrain material optimization option (Back Face Culling, Subpixel Polygons Reduce)?

Edited June 1, 2020 by dongju.jeong

[morbid]

Hello,

Hard to tell why. Do you see any patterns when intersection fails?

You also can try the following:

1. Disable setForceIntersection and check how it influences the result
2. Call this code from updatePhysics
3. Use PhysicsIntersectionNormalPtr intersection = PhysicsIntersectionNormal::create(); instead PhysicsIntersectionPtr intersection = PhysicsIntersection::create();

Thanks.

[dongju.jeong]

well.. 

I experimented by implementing the code in the fired bullet.

It's different every time I run it, but if I find a failing location and fire a bullet at the same location, it always fails.

 

after try the method you gave me, I tell you again.

Thank you.

Edited June 2, 2020 by dongju.jeong