koobas.hobune.stream
Spawning GameObject contained within another
Here is what I am trying to do. I have a gameobject. When a box collides with it, it should spawn another gameobject. I followed this link http://unity3d.com/support/documentation/Manual/Instantiating%20Prefabs.html . My code is pasted below:
var purpleTriangleBottomOuterCornerMelty : GameObject; function OnCollisionEnter(event : Collision) { Debug.Log("collision " + name); createMelty(name, transform.position); }
function createMelty(objectName: String, objectCoords: Vector3) { Debug.Log("instantiating " + meltyMappingList[objectName]["rotation"]); Instantiate(purpleTriangleBottomOuterCornerMelty, objectCoords, Quaternion.Euler(0, meltyMappingList[objectName].rotation, 0)); }
I have set the purpleTriangleBottomOuterCornerMelty variable to the prefab that I want to spawn, in the inspector of the object containing this script. But the Instantiate gives me a NullReferenceException. Apologies if I've missed something obvious, but I'm a total noob.
PS The above script is in my spawning object. I have a number of spawing objects, and want to spawn a different GameObject depending on the spawning object, so I made a mapping object (not included in the code) to map spawning object name to spawnee object.
To me, it looks like this:
meltyMappingList[objectName]["rotation"])
and this:
meltyMappingList[objectName].rotation
are what I would concentrate on. Something isn't quite right with those two. You didn't include what the meltyMappingList is, but how can meltyMappingList[string][string] and meltyMappingList[string].rotation both be correct? Are you sure you didn't want something like:
meltyMappingList[int]+ ".rotation")
and:
meltyMappingList[int].rotation
Yeah I agree, I'm not entirely sure what's going wrong there either. objectName and "rotation" are both string keys that give values. It has a general structure like: var melty$$anonymous$$appingList = { //Top half "ltPrplTriangle1" : {"melty": "purpleTriangleTop$$anonymous$$iddle$$anonymous$$elty", "rotation" : -45}};
where "ltPrplTriangle1" is one of the expected values of objectName
But the basic problem is that it's saying that purpleTriangleBottomOuterCorner$$anonymous$$elty is null, even though I've clearly assigned it in the Inspector
with this info I can only guess. can you instaniate this prefab in another script? can you instantiate a cube in this script! can you show the entire script and paste in the error message? It is probably something simple, but not obvious from the info in the question...
