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/*
* Copyright (c) 2009-2010 jMonkeyEngine
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* * Neither the name of 'jMonkeyEngine' nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package com.jme3.post.filters;
import com.jme3.asset.AssetManager;
import com.jme3.material.Material;
import com.jme3.post.Filter;
import com.jme3.renderer.RenderManager;
import com.jme3.renderer.ViewPort;
/**
* A post-processing filter that performs a depth range
* blur using a scaled convolution filter.
*
* @version $Revision: 779 $
* @author Paul Speed
*/
public class DepthOfFieldFilter extends Filter {
private float focusDistance = 50f;
private float focusRange = 10f;
private float blurScale = 1f;
// These values are set internally based on the
// viewport size.
private float xScale;
private float yScale;
/**
* Creates a DepthOfField filter
*/
public DepthOfFieldFilter() {
super("Depth Of Field");
}
@Override
protected boolean isRequiresDepthTexture() {
return true;
}
@Override
protected Material getMaterial() {
return material;
}
@Override
protected void initFilter(AssetManager assets, RenderManager renderManager,
ViewPort vp, int w, int h) {
material = new Material(assets, "Common/MatDefs/Post/DepthOfField.j3md");
material.setFloat("FocusDistance", focusDistance);
material.setFloat("FocusRange", focusRange);
xScale = 1.0f / w;
yScale = 1.0f / h;
material.setFloat("XScale", blurScale * xScale);
material.setFloat("YScale", blurScale * yScale);
}
/**
* Sets the distance at which objects are purely in focus.
*/
public void setFocusDistance(float f) {
this.focusDistance = f;
if (material != null) {
material.setFloat("FocusDistance", focusDistance);
}
}
/**
* returns the focus distance
* @return
*/
public float getFocusDistance() {
return focusDistance;
}
/**
* Sets the range to either side of focusDistance where the
* objects go gradually out of focus. Less than focusDistance - focusRange
* and greater than focusDistance + focusRange, objects are maximally "blurred".
*/
public void setFocusRange(float f) {
this.focusRange = f;
if (material != null) {
material.setFloat("FocusRange", focusRange);
}
}
/**
* returns the focus range
* @return
*/
public float getFocusRange() {
return focusRange;
}
/**
* Sets the blur amount by scaling the convolution filter up or
* down. A value of 1 (the default) performs a sparse 5x5 evenly
* distribubted convolution at pixel level accuracy. Higher values skip
* more pixels, and so on until you are no longer blurring the image
* but simply hashing it.
*
* The sparse convolution is as follows:
*%MINIFYHTMLc3d0cd9fab65de6875a381fd3f83e1b338%*
* Where 'x' is the texel being modified. Setting blur scale higher
* than 1 spaces the samples out.
*/
public void setBlurScale(float f) {
this.blurScale = f;
if (material != null) {
material.setFloat("XScale", blurScale * xScale);
material.setFloat("YScale", blurScale * yScale);
}
}
/**
* returns the blur scale
* @return
*/
public float getBlurScale() {
return blurScale;
}
}
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