Sprite.vertices

Description

Returns a copy of the array containing sprite mesh vertex positions.

// Obtain the vertices from the script and modify the position of one of them. Use OverrideGeometry() for this.
//Attach this script to a Sprite GameObject
//To see the vertices changing, make sure you have your Scene tab visible while in Play mode.
//Press the "Draw Debug" Button in the Game tab during Play Mode to draw the shape. Switch back to the Scene tab to see the shape.

using UnityEngine;

public class Example : MonoBehaviour
{
    private SpriteRenderer m_SpriteRenderer;
    private Rect buttonPos1;
    private Rect buttonPos2;

    void Start()
    {
        m_SpriteRenderer = gameObject.GetComponent<SpriteRenderer>();
        buttonPos1 = new Rect(10.0f, 10.0f, 200.0f, 30.0f);
        buttonPos2 = new Rect(10.0f, 50.0f, 200.0f, 30.0f);
    }

    void OnGUI()
    {
        //Press this Button to show the sprite triangles (in the Scene tab)
        if (GUI.Button(buttonPos1, "Draw Debug"))
            DrawDebug();
        //Press this Button to edit the vertices obtained from the Sprite
        if (GUI.Button(buttonPos2, "Perform OverrideGeometry"))
            ChangeSprite();
    }

    // Show the sprite triangles
    void DrawDebug()
    {
        Sprite sprite = m_SpriteRenderer.sprite;

        ushort[] triangles = sprite.triangles;
        Vector2[] vertices = sprite.vertices;
        int a, b, c;

        // draw the triangles using grabbed vertices
        for (int i = 0; i < triangles.Length; i = i + 3)
        {
            a = triangles[i];
            b = triangles[i + 1];
            c = triangles[i + 2];

            //To see these you must view the game in the Scene tab while in Play mode
            Debug.DrawLine(vertices[a], vertices[b], Color.red, 100.0f);
            Debug.DrawLine(vertices[b], vertices[c], Color.red, 100.0f);
            Debug.DrawLine(vertices[c], vertices[a], Color.red, 100.0f);
        }
    }

    // Edit the vertices obtained from the sprite.  Use OverrideGeometry to
    // submit the changes.
    void ChangeSprite()
    {
        //Fetch the Sprite and vertices from the SpriteRenderer
        Sprite sprite = m_SpriteRenderer.sprite;
        Vector2[] spriteVertices = sprite.vertices;

        for (int i = 0; i < spriteVertices.Length; i++)
        {
            spriteVertices[i].x = Mathf.Clamp(
                (sprite.vertices[i].x - sprite.bounds.center.x -
                    (sprite.textureRectOffset.x / sprite.texture.width) + sprite.bounds.extents.x) /
                (2.0f * sprite.bounds.extents.x) * sprite.rect.width,
                0.0f, sprite.rect.width);

            spriteVertices[i].y = Mathf.Clamp(
                (sprite.vertices[i].y - sprite.bounds.center.y -
                    (sprite.textureRectOffset.y / sprite.texture.height) + sprite.bounds.extents.y) /
                (2.0f * sprite.bounds.extents.y) * sprite.rect.height,
                0.0f, sprite.rect.height);

            // Make a small change to the second vertex
            if (i == 2)
            {
                //Make sure the vertices stay inside the Sprite rectangle
                if (spriteVertices[i].x < sprite.rect.size.x - 5)
                {
                    spriteVertices[i].x = spriteVertices[i].x + 5;
                }
                else spriteVertices[i].x = 0;
            }
        }
        //Override the geometry with the new vertices
        sprite.OverrideGeometry(spriteVertices, sprite.triangles);
    }
}