how to make object follow mouse cursor while detecting collision

Questions & Answers
1

Hello Guys,
i was trying to make an gameobject follow the mouse cursor while in same time detect collision as i am making some sort of shop in my game i want player to buy things and then place them but the problem is the player can overlap 2 things in each other here is the code i use:
void FixedUpdate () {
Ray CamRay = Camera.main.ScreenPointToRay (Input.mousePosition);

		RaycastHit floorHit;

		if (Physics.Raycast (CamRay, out floorHit, camRayLength, floorMask) && boolc1 == true) {
			BluePrint = Instantiate (Computer1, floorHit.point, rot);
			boolc1 = false;
		}
		if (BluePrint != null) {
			BluePrint.GetComponent<Rigidbody> ().MovePosition (new Vector3 (floorHit.point.x,0.7f,floorHit.point.z));
			if (Input.GetKeyDown (KeyCode.R)) {
				BluePrint.transform.Rotate (BluePrint.transform.rotation.x, BluePrint.transform.rotation.y + 90, BluePrint.transform.rotation.z);
			}
			BluePrint.transform.position = new Vector3 (BluePrint.transform.position.x, 0.7f, BluePrint.transform.position.z);
			if (Input.GetMouseButtonDown (0)) {
				Instantiate (BluePrint, BluePrint.transform.position, BluePrint.transform.rotation);
				Destroy (BluePrint);
				Money -= BpPrice;
				BuySound.clip = BuyClib;
				BuySound.Play ();
			}
			PD = BluePrint.GetComponent<PlaceDetect> ();
			PD.IsBluePrint = true;
		}
		MoneyText.text = Money.ToString () + "$";
		Sal.myData._iUser.Money = Money;
	}

and this code attached to the gameobject:
using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class PlaceDetect : MonoBehaviour {
	public bool IsBluePrint = false;

	void OnCollisionEnter(Collision collision) {
		if (collision.gameObject.tag != "Floor" && IsBluePrint == true) {
			GetComponent<Renderer> ().material.color = Color.red;
			Debug.Log ("Collided with othe object");
		}
	}
}

note: isBluePrint is getting Triggered from other Script.

2

Fixed it My Self :smiley:

Here is the New Code:

void FixedUpdate () {
		Ray CamRay = Camera.main.ScreenPointToRay (Input.mousePosition);

		RaycastHit floorHit;

		if (Physics.Raycast (CamRay, out floorHit, camRayLength, floorMask) && boolc1 == true) {
			BluePrint = Instantiate (Computer1, floorHit.point, rot);
			boolc1 = false;
		}
		if (BluePrint != null) {
			BluePrint.GetComponent<Rigidbody> ().position = new Vector3 (floorHit.point.x,0.7f,floorHit.point.z);
			if (Input.GetKeyDown (KeyCode.R)) {
				BluePrint.transform.Rotate (BluePrint.transform.rotation.x, BluePrint.transform.rotation.y + 90, BluePrint.transform.rotation.z);
			}
			BluePrint.transform.position = new Vector3 (BluePrint.transform.position.x, 0.7f, BluePrint.transform.position.z);
			PD = BluePrint.GetComponent<PlaceDetect> ();
			PD.IsBluePrint = true;
			if (BluePrint.GetComponentInChildren<MeshCollider> ().isTrigger == false) {
				BluePrint.GetComponentInChildren<MeshCollider> ().isTrigger = true;
			}
			if (Input.GetMouseButtonDown (0) && PD.CanNotbePlaced == false) {
				BluePrint.GetComponentInChildren<MeshCollider> ().isTrigger = false;
				PD.IsBluePrint = false;
				Instantiate (BluePrint, BluePrint.transform.position, BluePrint.transform.rotation);
				Destroy (BluePrint);
				Money -= BpPrice;
				BuySound.clip = BuyClib;
				BuySound.Play ();
			}if (PD.CanNotbePlaced == true && Input.GetMouseButtonDown (0) && Timer > 3) {
				WarningText.text = "The Object Can Not Be Placed Here!";
				StartCoroutine (WarnWait ());
				Timer = 0;
			}
		}
		MoneyText.text = Money.ToString () + "$";
		Sal.myData._iUser.Money = Money;
		Timer += Time.deltaTime;
	}

and the other Script:

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class PlaceDetect : MonoBehaviour {
	public bool IsBluePrint = false;
	public Material[] OColors;
	public Material[] OtherColor;
	public bool CanNotbePlaced = false;
	GameObject GMObject;
	GameManger Gm;

	void Start () {
		GMObject = GameObject.FindGameObjectWithTag ("GameController");
		Gm = GMObject.GetComponent<GameManger> ();
	}

	void OnTriggerEnter(Collider other) {
		if (other.gameObject.tag != "Floor" && IsBluePrint == true) {
			GetComponentInChildren<Renderer> ().materials = OtherColor;
			CanNotbePlaced = true;
		}
	}
	void OnTriggerExit(Collider other) {
		if (other.gameObject.tag != "Floor" && IsBluePrint == true) {
			GetComponentInChildren<Renderer> ().materials = OColors;
			CanNotbePlaced = false;
		}
	}
}