Instantiating Objects on the Sides of Other Objects

Questions & Answers
1

I want to spawn cubes or other prefab models on the sides of a main objects. For instance you would have engines, shields or communication objects. Also being able to rotate objects in the desired orientation. What I know I need to do is to have a script that knows when the mouse is over an object. Then I need it to snap the object to the side of the main object. Then I think this part is much simpler is rotating the object if the right keys are pressed.

2

When instantiating a prefab, you can set the position right away in the second parameter:

Instantiate(prefab, position, Quaternion.identity);

Second parameter is used to set the position, for examle transform.position.

Third parameter Quaternion.identity is used to set the rotation. However, if you don´t know how Quaternions work, you can store the instatiated object into the variable:

//JavaScript
var clone : GameObject = Instantiate(prefab, position, Quaternion.identity);
clone.transform.eulerAngles = Vector3(x, y, z);

//C#
GameObject clone = (GameObject) Instantiate(prefab, position, Quaternion.identity);
clone.transform.eulerAngles = new Vector3(x, y, z);

You can manipulate with objects created with GameObject.CreatePrimitive the same way:

//JavaScript
var clone : GameObject = GameObject.CreatePrimitive(PrimitiveType.Cube);
clone.transform.position = Vector3(x, y, z);
clone.transform.eulerAngles = Vector3(x, y, z);

//C#
GameObject clone = GameObject.CreatePrimitive(PrimitiveType.Cube);
clone.transform.position = new Vector3(x, y, z);
clone.transform.eulerAngles = new Vector3(x, y, z);