unity-game-engineguitexture

Hide part of the GUITexture in Unity

I have a Health Bar in my Unity game and it's implemented as a GUITexture with gradient image from red to green.

enter image description here

Now I can reduce it's width from max width to 0, but is still scaled gradient.

public void UpdateHealthBar(int hitPoints) {
    healthBar.pixelInset = new Rect(
        healthBar.pixelInset.x, healthBar.pixelInset.y,
        3* hitPoints, healthBar.pixelInset.height);
}

enter image description here

But I want to hide (make transparent) the right part of this health bar in game progress.

enter image description here

How can I do this? Thanks!

Solution

  • Or you can use GUI.DrawTextureWithTexCoords()

    public Texture2D texture;
public float hp = 100f;
public const float hpMax = 100f;

void OnGUI()
{
    GUI.DrawTextureWithTexCoords (new Rect (0, 0, hp, 20), texture, new Rect (0f, 0f, hp/hpMax, 1f));
}