Color.Lerp over HP

Questions & Answers
1

Hello. I’m trying to create a floor that heats up by being in contact with certain objects. and it cools when coming in contact with others.

The thing is that I want to show visually by the color of the floor if it is cold or hot. Because when it reaches its maximum temperature the floor falls.

CODE:
using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class EstadosPlataforma : MonoBehaviour {
	//Controller controller;

	public float grados;
	Rigidbody rgb;
	public bool Helada, Ardiendo;

	public Color StartColor;
	public Color EndColorBlue;
	public Color EndColorRed;

	public GameObject Heat;
	public GameObject Frio;

	// Use this for initialization
	void Start () {
		
		grados = 0; //---DEGREES--//
		rgb = GetComponent<Rigidbody> ();
		Helada = false; //--FROZEN FLOOR--//
		Ardiendo = false; //--BURNING FLOOR--//
	}
	
	// Update is called once per frame
	void Update () {

		if (grados >= 100f) {
			Ardiendo = true;

		} else {
			Ardiendo = false;
		}

		if (grados <= -100f) {
			Helada = true;
			transform.gameObject.tag = "PlataformaHelada";

			Frio.GetComponent<AudioSource>().enabled = true;

		} else {
			Helada = false;
			transform.gameObject.tag = "Plataforma";
		}

		if (Ardiendo) {
			rgb.constraints = RigidbodyConstraints.None;
			Heat.GetComponent<AudioSource>().enabled = true;
			Destroy (gameObject, 2);

		}
	}
	void OnCollisionStay (Collision c) {
		if (c.transform.tag == "Hielo" && grados > -100f) {
			grados -= 3.5f * Time.deltaTime;
		}

		if (c.transform.tag == "Fuego" && grados < 100f) {
			grados += 3.5f * Time.deltaTime;
		}

		if (c.transform.tag == "Golem" && grados <= 100f) {
			grados += 1.5f * Time.deltaTime;
		} else {
			grados += 0f * Time.deltaTime;
		}
	}
}
2

To solve this, you should set the color of the material you are using:

private Renderer ownRenderer; // private member variable to store the renderer

// add to Start(), or even better, to Awake()
ownRenderer = GetComponent<Renderer>();

// in Update(), when Ardiendo = true
ownRenderer.material.color = EndColorRed;

// in Update(), when Helado = true
ownRenderer.material.color = EndColorBlue;

// in Update(), when neither Helado nor Ardiendo is true
ownRenderer.material.color = StartColor;

Note that this will only change the main color of one renderer. If your platform model consists of multiple Renderers or has a complex material, then you will need a more complex setup (for example with Renderer[] ownRenderers = GetComponentsInChildren<Renderer>(); and/or cycle through ownRenderer.materials).

Additionally, you may want to use Color.Lerp(startColor, endColor, Mathf.Abs(grados / 100));to transition the color over time (post a comment if you need a help with this :wink: ).