Question

我正在尝试使用此代码将对象dut的红色值更改为它与相机之间的距离：

using UnityEngine;
using UnityEngine.UI;     

public class DistanceToCheckpoint : MonoBehaviour {

    // Reference to checkpoint position
    [SerializeField]
    private Transform checkpoint;

    // Reference to UI text that shows the distance value
    [SerializeField]
    private Text distanceText;

    // Calculated distance value
    private float distance;

    // Update is called once per frame
    private void Update()
    {
        // Calculate distance value between character and checkpoint
        distance = (checkpoint.transform.position - transform.position).magnitude;

        // Display distance value via UI text
        // distance.ToString("F1") shows value with 1 digit after period
        // so 12.234 will be shown as 12.2 for example
        // distance.ToString("F2") will show 12.23 in this case
        distanceText.text = "Distance: " + distance.ToString("F1") + " meters";
    }

}

然后我把它放在Update（）中：

checkpoint.GetComponent<Renderer>().material.color = new Color(1, (255 - distance.ToString("F1")), 0, 0);

Answer 1

您需要确定物体完全红色的距离。然后，您可以根据该距离的因子修改该值。

例如，如果你希望它在距离50及以后是红色的，你就可以......

checkpoint.GetComponent<Renderer>().material.color = new Color(distance/50f, 0, 0);

Answer 2

Color的第四个参数是Alpha值（透明度）

0表示隐身
1完全可见

您输入的值必须是浮点值，范围从0到1.

float startDistance = 100f;
float blackAtDistance = 5f;

distance -= blackAtDistance;
percentage = distance / maxDistance;
percentage = Mathf.Clamp(percentage, 0, 1);
checkpoint.GetComponent<Renderer>().material.color = new Color(percentage, 0, 0, 1);

我没有测试它，但它应该可以工作。

Answer 3

我还没有包括你所做的一切，只包括与答案有关的部分。我已经评论过它，希望能让你遵循这个推理。

public class DistanceToCheckpoint : MonoBehaviour
{
    // Reference to UI text that shows the distance value
    [SerializeField]
    private Text distanceText;

    // Reference to checkpoint position
    [SerializeField]
    private Transform checkpoint;
    private Material checkpointMaterial;

    [Tooltip ( "This is the color your object starts with." )]
    public Color StartColor;
    [Tooltip ( "This is the distance your object is the Start Color." )]
    public float ColorDistanceFar;
    [Tooltip ( "This is the distance your object becomes full black." )]
    public float ColorDistanceNear;
    private float colourDistanceRange;

    // Calculated distance value
    private float distance;

    private void Start ( )
    {
        colourDistanceRange = ColorDistanceFar - ColorDistanceNear;
        checkpointMaterial = checkpoint.GetComponent<Renderer> ( ).material;
    }

    private void Update ( )
    {
        // Calculate distance value between character and checkpoint
        distance = ( checkpoint.transform.position - transform.position ).magnitude;
        distanceText.text = $"Distance: {distance.ToString ( "F1" )} meters";

        // Start with full color amount.
        float colourAmount = 1;
        // Check to see if the distance is closer than the ColorDistanceNear distance. In which case the colour should be black.
        if ( distance <= ColorDistanceNear ) colourAmount = 0;
        // Else, check to see if the distance is closer than the ColorDistanceFar distance. We need to "normalize" this value.
        else if ( distance < ColorDistanceFar ) colourAmount = ( distance - ColorDistanceNear ) / colourDistanceRange;

        // Now we "multiply" the colour with the colourAmount to get something between the full colour and black.
        checkpointMaterial.color = StartColor * colourAmount;
    }
}

Answer 4

我只是成功了：

using UnityEngine;
using UnityEngine.UI;     

public class DistanceToCheckpoint : MonoBehaviour {

    // Reference to checkpoint position
    [SerializeField]
    private Transform checkpoint;

    // Calculated distance value
    private float distance;

    // Update is called once per frame
    private void Update()
    {
        // Calculate distance value between character and checkpoint
        distance = (checkpoint.transform.position - transform.position).magnitude;

        checkpoint.GetComponent<Renderer>().material.color = new Color(-(100 - distance), 0, 0);
    }

}

现在我想将它应用于不同的元素，你认为有办法做一个foreach吗？

由于距离而改变GameObject颜色

4 个答案: