Vector4.Vector3

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Description

Converts a Vector4 to a Vector3.

Vector4s can be implicitly converted to Vector3 (w is discarded).

using UnityEngine;
using System.Collections;

public class ExampleClass : MonoBehaviour
{
    void Start()
    {
        // Shader vectors are always Vector4s.
        // But the value here is converted to a Vector3.
        Vector3 value = Vector3.one;
        Renderer renderer = GetComponent<Renderer>();
        renderer.material.SetVector("_SomeVariable", value);
    }
}