API > Renderer.material ~ Error Cannot implicitly convert type `float' to `int'

Unity Engine
1

~ Error Cannot implicitly convert type float' to int’

using UnityEngine;
using System.Collections;

public class ExampleClass : MonoBehaviour {
    public Material[] materials;
    public float changeInterval = 0.33F;
    public Renderer rend;
    void Start() {
        rend = GetComponent<Renderer>();
        rend.enabled = true;
    }
    void Update() {
        if (materials.Length == 0)
            return;
     
        int index = Time.time / changeInterval;
        index = index % materials.Length;
        rend.sharedMaterial = materials[index];
    }
}

using UnityEngine;
using System.Collections;

public class ExampleClass : MonoBehaviour
{
    public Renderer rend;
    void Start ()
    {
        rend = GetComponent<Renderer> ();
        rend.enabled = true;
    }
    void Update ()
    {
        int seconds = Time.time;
        bool oddeven = seconds % 2 == 0;
        rend.enabled = oddeven;
    }
}

Playing around with the tutorials and API’s.
Both API examples give same error in 5.01

2

Time.time is a float, you’ve declared ‘seconds’ as an int, which do not have an implicit conversion, as the error states.

You, my friend, need to learn about data types and casting :slight_smile:

3

I didn’t declare anything; these are both copy paste direct from UNITY’s API pages.

4

The variable index was declared as int and “time.time / changeInterval” returns a float value.
Convert the value to integer using:
Mathf.FloorToInt
or
Mathf.RoundToInt

Try this:

using UnityEngine;
using System.Collections;

public class ExampleClass : MonoBehaviour {
    public Material[] materials;
    public float changeInterval = 0.33F;
    public Renderer rend;
    void Start() {
        rend = GetComponent<Renderer>();
        rend.enabled = true;
    }
    void Update() {
        if (materials.Length == 0)
            return;
     
        int index = Mathf.RoundToInt(Time.time / changeInterval);
        index = index % materials.Length;
        rend.sharedMaterial = materials[index];
    }
}

using UnityEngine;
using System.Collections;

public class ExampleClass : MonoBehaviour
{
    public Renderer rend;
    void Start ()
    {
        rend = GetComponent<Renderer> ();
        rend.enabled = true;
    }
    void Update ()
    {
        int seconds = Mathf.RoundToInt(Time.time);
        bool oddeven = seconds % 2 == 0;
        rend.enabled = oddeven;
    }
}

[Edited]

Or

using UnityEngine;
using System.Collections;

public class ExampleClass : MonoBehaviour {
    public Material[] materials;
    public float changeInterval = 0.33F;
    public Renderer rend;
    void Start() {
        rend = GetComponent<Renderer>();
        rend.enabled = true;
    }
    void Update() {
        if (materials.Length == 0)
            return;
       
        float index = Time.time / changeInterval;
        index = index % materials.Length;
        rend.sharedMaterial = materials[Mathf.FloorToInt(index)];
    }
}

using UnityEngine;
using System.Collections;

public class ExampleClass : MonoBehaviour
{
    public Renderer rend;
    void Start ()
    {
        rend = GetComponent<Renderer> ();
        rend.enabled = true;
    }
    void Update ()
    {
        float seconds = Time.time;
        bool oddeven = seconds % 2 == 0;
        rend.enabled = oddeven;
    }
}

Denis Lemos

5

I think people are missing the OP’s point, which is that the Unity scripting reference examples contain the errors.

1 Like