altering image effects based on game state?

Unity Engine
1

i want to be able to change the level of motion blur based on a variable within the character’s movement script. however, the motion blur script does not inherit from monobehaviour, and i can’t get it to do so, so i can’t access the variable i need. here’s the code i’m trying to use right now, which gives me error CS1721: MotionBlur': Classes cannot have multiple base classes (ImageEffectBase’ and `UnityEngine.MonoBehaviour’)

using UnityEngine;

// This class implements simple ghosting type Motion Blur.
// If Extra Blur is selected, the scene will allways be a little blurred,
// as it is scaled to a smaller resolution.
// The effect works by accumulating the previous frames in an accumulation
// texture.
[AddComponentMenu("Image Effects/Motion Blur")]
public class MotionBlur : ImageEffectBase, MonoBehaviour
{
	public float groundedAmount = 0.01f;
	public float firstJumpAmount = 0.2f;
	public float secondJumpAmount = 0.4f;
	public float thirdJumpAmount = 0.8f;
	public bool extraBlur = false;
	
	private NormalCharacterMotor character;
	
	private RenderTexture accumTexture;
	
	void Start() {
		character = GameObject.FindWithTag("Player").GetComponent(typeof(NormalCharacterMotor)) as NormalCharacterMotor;
	}
	
	protected new void OnDisable()
	{
		base.OnDisable();
		DestroyImmediate(accumTexture);
	}

	// Called by camera to apply image effect
	void OnRenderImage (RenderTexture source, RenderTexture destination)
	{	
		// Create the accumulation texture
		if (accumTexture == null || accumTexture.width != source.width || accumTexture.height != source.height)
		{
			DestroyImmediate(accumTexture);
			accumTexture = new RenderTexture(source.width, source.height, 0);
			accumTexture.hideFlags = HideFlags.HideAndDontSave;
			ImageEffects.Blit( source, accumTexture );
		}
		
		// If Extra Blur is selected, downscale the texture to 4x4 smaller resolution.
		if (extraBlur)
		{
			RenderTexture blurbuffer = RenderTexture.GetTemporary(source.width/4, source.height/4, 0);
			ImageEffects.Blit(accumTexture, blurbuffer);
			ImageEffects.Blit(blurbuffer,accumTexture);
			RenderTexture.ReleaseTemporary(blurbuffer);
		}
		
		//determine the amount of blur based on which jump the character is doing
		if (character.grounded) {
			blurAmount = groundedAmount;
		}
			else if (character.jumpCount == 1) {
				blurAmount = firstJumpAmount;
			}
				else if (character.jumpCount == 2) {
					blurAmount = secondJumpAmount;
				}
					else if (character.jumpCount == 3) {
						blurAmount = thirdJumpAmount;
					}
		
		// Clamp the motion blur variable, so it can never leave permanent trails in the image
		blurAmount = Mathf.Clamp( blurAmount, 0.0f, 0.92f );
		
		// Setup the texture and floating point values in the shader
		material.SetTexture("_MainTex", accumTexture);
		material.SetFloat("_AccumOrig", 1.0F-blurAmount);
		
		// Render the image using the motion blur shader
		ImageEffects.BlitWithMaterial (material, source, accumTexture);
		ImageEffects.Blit(accumTexture, destination);
	}
}

what other way should i try to do this?

2

You don’t need to touch the motion blur script. Just access public variables from it the usual way. ( http://unity3d.com/support/documentation/ScriptReference/index.Accessing_Other_Game_Objects.html )

–Eric

3

oh right, thanks. how embarrassing! i guess i got too used to one way of doing things.