BlendShapeController.cs

using UnityEngine;
using System.Collections;

public class BlendShapeController : MonoBehaviour
{
    public int blendShape;
    public float weight;
    public int blendShape2;
    public float weight2;
    int blendShapeCount;
    int currBlendShape = 0;
    SkinnedMeshRenderer skinnedMeshRenderer;
    Mesh skinnedMesh;
    float blendVal = 0f;
    bool first_update = true;

    void Awake ()
    {
        skinnedMeshRenderer = GetComponent<SkinnedMeshRenderer> ();
        skinnedMesh = GetComponent<SkinnedMeshRenderer> ().sharedMesh;
    }

    void Start ()
    {
        blendShapeCount = skinnedMesh.blendShapeCount;

        //initialize any blendshapes for this model here
        skinnedMeshRenderer.SetBlendShapeWeight (blendShape, weight);
        skinnedMeshRenderer.SetBlendShapeWeight (blendShape2, weight2);

        currBlendShape = 0;
        blendVal = skinnedMeshRenderer.GetBlendShapeWeight(currBlendShape);
    }

    void Update ()
    {
        if(first_update)
        {
            Start ();
            first_update = false;
        }

        //reset all blend shapes if select is pressed
        if (Input.GetKeyDown (KeyCode.Joystick1Button6) || (Input.GetKeyDown(KeyCode.P)))
        {
            currBlendShape = blendShapeCount - 1;
            blendVal = 0f;

            do
            {
                skinnedMeshRenderer.SetBlendShapeWeight (currBlendShape, blendVal);
                currBlendShape--;
            }
            while( currBlendShape > 0 );

            Start ();
        }

        //change the current shape
        if (Input.GetKeyDown(KeyCode.Joystick1Button2) || Input.GetKeyDown(KeyCode.Comma))
        {
            if(currBlendShape <= 0)
                currBlendShape = blendShapeCount - 1;
            else
                currBlendShape--;

            blendVal = skinnedMeshRenderer.GetBlendShapeWeight(currBlendShape);
        }
        else if (Input.GetKeyDown(KeyCode.Joystick1Button1) || Input.GetKeyDown(KeyCode.Period))
        {
            if(currBlendShape + 1 >= blendShapeCount)
                currBlendShape = 0;
            else
                currBlendShape++;

            blendVal = skinnedMeshRenderer.GetBlendShapeWeight(currBlendShape);
        }

        //modify current shape by trigger values
        float value = Input.GetAxis("Triggers") * -1;

        if( Input.GetKey(KeyCode.Semicolon) )
        {
            value = 1f;
        }
        else if( Input.GetKey(KeyCode.Quote) )
        {
            value = -1f;
        }

        if (blendVal > 0f && value < 0f)
        {
            //restore dick head if size increases from 0
            if(currBlendShape == blendShape)
            {
                if( blendVal >= 100f )
                {
                    skinnedMeshRenderer.SetBlendShapeWeight (blendShape2, weight2);
                }
            }

            blendVal += value;
        }
        else if (blendVal < 100f && value > 0f)
        {
            blendVal += value;
        }

        skinnedMeshRenderer.SetBlendShapeWeight (currBlendShape, blendVal);

        //hide dick head if size reduced to 0
        if(currBlendShape == blendShape)
        {
            if( blendVal >= 100f && skinnedMeshRenderer.GetBlendShapeWeight(blendShape2) > 0f )
            {
                skinnedMeshRenderer.SetBlendShapeWeight (blendShape2, 0f);
            }
        }
    }
}