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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.scene.plugins.blender.lights;
import com.jme3.asset.BlenderKey.FeaturesToLoad;
import com.jme3.light.DirectionalLight;
import com.jme3.light.Light;
import com.jme3.light.PointLight;
import com.jme3.light.SpotLight;
import com.jme3.math.ColorRGBA;
import com.jme3.math.FastMath;
import com.jme3.scene.plugins.blender.AbstractBlenderHelper;
import com.jme3.scene.plugins.blender.BlenderContext;
import com.jme3.scene.plugins.blender.BlenderContext.LoadedFeatureDataType;
import com.jme3.scene.plugins.blender.exceptions.BlenderFileException;
import com.jme3.scene.plugins.blender.file.Structure;
import java.util.logging.Level;
import java.util.logging.Logger;
/**
* A class that is used in light calculations.
* @author Marcin Roguski
*/
public class LightHelper extends AbstractBlenderHelper {
private static final Logger LOGGER = Logger.getLogger(LightHelper.class.getName());
/**
* This constructor parses the given blender version and stores the result. Some functionalities may differ in
* different blender versions.
* @param blenderVersion
* the version read from the blend file
* @param fixUpAxis
* a variable that indicates if the Y asxis is the UP axis or not
*/
public LightHelper(String blenderVersion, boolean fixUpAxis) {
super(blenderVersion, fixUpAxis);
}
public Light toLight(Structure structure, BlenderContext blenderContext) throws BlenderFileException {
Light result = (Light) blenderContext.getLoadedFeature(structure.getOldMemoryAddress(), LoadedFeatureDataType.LOADED_FEATURE);
if (result != null) {
return result;
}
int type = ((Number) structure.getFieldValue("type")).intValue();
switch (type) {
case 0://Lamp
result = new PointLight();
float distance = ((Number) structure.getFieldValue("dist")).floatValue();
((PointLight) result).setRadius(distance);
break;
case 1://Sun
LOGGER.log(Level.WARNING, "'Sun' lamp is not supported in jMonkeyEngine.");
break;
case 2://Spot
result = new SpotLight();
//range
((SpotLight)result).setSpotRange(((Number) structure.getFieldValue("dist")).floatValue());
//outer angle
float outerAngle = ((Number) structure.getFieldValue("spotsize")).floatValue()*FastMath.DEG_TO_RAD * 0.5f;
((SpotLight)result).setSpotOuterAngle(outerAngle);
//inner angle
float spotblend = ((Number) structure.getFieldValue("spotblend")).floatValue();
spotblend = FastMath.clamp(spotblend, 0, 1);
float innerAngle = outerAngle * (1 - spotblend);
((SpotLight)result).setSpotInnerAngle(innerAngle);
break;
case 3://Hemi
LOGGER.log(Level.WARNING, "'Hemi' lamp is not supported in jMonkeyEngine.");
break;
case 4://Area
result = new DirectionalLight();
break;
default:
throw new BlenderFileException("Unknown light source type: " + type);
}
if (result != null) {
float r = ((Number) structure.getFieldValue("r")).floatValue();
float g = ((Number) structure.getFieldValue("g")).floatValue();
float b = ((Number) structure.getFieldValue("b")).floatValue();
result.setColor(new ColorRGBA(r, g, b, 1.0f));
}
return result;
}
@Override
public boolean shouldBeLoaded(Structure structure, BlenderContext blenderContext) {
return (blenderContext.getBlenderKey().getFeaturesToLoad() & FeaturesToLoad.LIGHTS) != 0;
}
}
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