koobas.hobune.stream
How to instantiate a gameobject by aligning it to another one
Hello. I'm new in Unity3D. I'm developing a top-down game (2D Game). I have a floor prefab and I want to instantiate it, but its spawn position in YAxis has to be upper edge of previous floor prefab.
What I want to achieve is: For example, I want to construct a 5 floors building.
Here's my GameSrarter script.
using UnityEngine; using System.Collections;
public class GameStarter : MonoBehaviour {
void Awake(){
// First prefab is instantiated Vector2.zero position.
GameObject floor1 = Instantiate(Resources.Load("Prefabs/floor"), Vector2.zero, Quaternion.identity) as GameObject;
// But I cannot find upper edge of floor1 prefab as Vector.
GameObject floor2 = Instantiate(Resources.Load("Prefabs/floor"), IDontKnowHowToSpecifyThisOne, Quaternion.identity) as GameObject;
}
}
Thanks for your helps.
Could you use floor1.transform.position.y + 2 (or some # that works for what you are trying to do)
I tried it. But floor heights might change. I have to find the exact vector position for the next floor that will be placed at top of the previous floor.
Floor prefab consists of 2 prefabs: "top" and "bottom".
What I wanted to achieve was: 
void Awake(){
float nextPosition = Vector2.zero.y;
for (int i = 0; i < 5; i++) {
GameObject floor = Instantiate(Resources.Load("Prefabs/Environment/floor"), new Vector2(Vector2.zero.x, nextPosition), Quaternion.identity) as GameObject;
Transform floorTop = floor.transform.FindChild("top");
Transform floorBottom = floor.transform.FindChild("bottom");
float halfBottom = (floorBottom.renderer.bounds.size.y / 2);
float halfTop = (floorTop.renderer.bounds.size.y / 2);
nextPosition += ((floorTop.position - floorBottom.position).y) + halfTop + halfBottom;
}
}
This code works for me but If anyone knows such efficient way that make this code simple, Please answer.
Thank you.
Presumably your floor prefabs are all different heights? (If not- duh!) So, maybe you want a
howHigh : Dictionary.< GameObject, float >
That keeps track of the height of all floors prefabs. And a
heightSoFar : float
that is set to zero with each new building, and increased by the appropriate floor height ( howHigh[floor1] ) etc. each time you add a floor to the building.
How can I find height of the floor and use it to deter$$anonymous$$e start positiom of next floor prefab?
