Unity UGUI Shadow Shadow Component Introduction Example

Introduction and use of Shadow (shadow) components of Unity UGUI

1. What is the Shadow component?

The Shadow component is a special effect component in Unity UGUI for adding shadow effects on UI elements. By adjusting the properties of the shadow color, offset, blur, etc., the UI elements can look more three-dimensional and layered.

2. How the Shadow component works

The Shadow component achieves the shadow effect by drawing a shadow image below the UI element that is the same shape but slightly enlarged as the UI element. The color, offset, and blur of the shadow image can be adjusted by properties.

3. Common properties of Shadow (shadow) component

Effect Color: The color of the shadow.
Effect Distance: The offset distance of the shadow.
Use Graphic Alpha: Whether to use the transparency of UI elements as the transparency of the shadow.
Blur: The degree of blur of the shadow.
Blur Distance: Blur distance of shadows.

4. Common functions of Shadow (shadow) component

ModifyMesh: Modify the grid of UI elements to draw shadow images.

5. Complete example code

Example 1: Adding a shadow effect

using UnityEngine;
using ;
public class AddShadowExample : MonoBehaviour
{
    public Text text;
    public Shadow shadow;
    void Start()
    {
        shadow = <Shadow>();
         = true;
    }
}

Operation steps：

Create a Text object and mount the script to the object.
Drag the Text object to the scripttextin variable.
In the Start function, get the Shadow component on the Text object and place itenabledThe property is set to true.

Things to note：

Before using Shadow components, you need to make sure that there is already a Graphic component (such as Text, Image, etc.) on the UI element.

Example 2: Adjust the shade color

using UnityEngine;
using ;
public class ChangeShadowColorExample : MonoBehaviour
{
    public Text text;
    public Shadow shadow;
    void Start()
    {
        shadow = <Shadow>();
         = true;
         = ;
    }
}

Operation steps：

Create a Text object and mount the script to the object.
Drag the Text object to the scripttextin variable.
In the Start function, get the Shadow component on the Text object and place itenabledThe property is set to true.
Put Shadow component'seffectColorThe property is set to red.

Things to note：

effectColorThe property accepts a value of Color type, and the color of the shadow can be adjusted by setting different RGB values.

Example 3: Adjust shadow offset

using UnityEngine;
using ;
public class ChangeShadowOffsetExample : MonoBehaviour
{
    public Text text;
    public Shadow shadow;
    void Start()
    {
        shadow = <Shadow>();
         = true;
         = new Vector2(5, -5);
    }
}

Operation steps：

Create a Text object and mount the script to the object.
Drag the Text object to the scripttextin variable.
In the Start function, get the Shadow component on the Text object and place itenabledThe property is set to true.
Put Shadow component'seffectDistanceThe property is set to Vector2(5, -5).

Things to note：

effectDistanceThe property accepts values of type Vector2, and the shadow offset can be adjusted by setting different x and y values.

Example 4: Adjust the degree of shadow blur

using UnityEngine;
using ;
public class ChangeShadowBlurExample : MonoBehaviour
{
    public Text text;
    public Shadow shadow;
    void Start()
    {
        shadow = <Shadow>();
         = true;
         = 2;
    }
}

Operation steps：

Create a Text object and mount the script to the object.
Drag the Text object to the scripttextin variable.
In the Start function, get the Shadow component on the Text object and place itenabledThe property is set to true.
Put Shadow component'sblurThe property is set to 2.

Things to note：

blurThe property accepts values of float type, and the degree of blurring of the shadow can be adjusted by setting different values.

Example 5: Use Graphic Alpha as shadow transparency

using UnityEngine;
using ;
public class UseGraphicAlphaExample : MonoBehaviour
{
    public Text text;
    public Shadow shadow;
    void Start()
    {
        shadow = <Shadow>();
         = true;
         = true;
    }
}

Operation steps：

Create a Text object and mount the script to the object.
Drag the Text object to the scripttextin variable.
In the Start function, get the Shadow component on the Text object and place itenabledThe property is set to true.
Put Shadow component'suseGraphicAlphaThe property is set to true.

Things to note：

whenuseGraphicAlphaWhen the property is set to true, the transparency of the shadow will be consistent with the transparency of the UI element.

References

Unity official documentation:Shadow

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