com.sun.scenario.effect.light.DistantLight Maven / Gradle / Ivy
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
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* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
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* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
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*/
package com.sun.scenario.effect.light;
import com.sun.scenario.effect.Color4f;
/**
* Represents a distant light source.
*/
public class DistantLight extends Light {
private float azimuth;
private float elevation;
/**
* Constructs a new {@code DistantLight} with default azimuth (0.0),
* elevation (0.0), and color ({@code Color4f.WHITE}).
*/
public DistantLight() {
this(0f, 0f, Color4f.WHITE);
}
/**
* Constructs a new {@code DistantLight} with the given azimuth,
* elevation, and color.
*
* @param azimuth the azimuth of the light, in degrees
* @param elevation the elevation of the light, in degrees
* @param color the color of the light
* @throws IllegalArgumentException if {@code color} is null
*/
public DistantLight(float azimuth, float elevation, Color4f color) {
super(Type.DISTANT, color);
this.azimuth = azimuth;
this.elevation = elevation;
}
/**
* Returns the azimuth of the light. The azimuth is the direction angle
* for the light source on the XY plane, in degrees.
*
* @return the azimuth of the light, in degrees
*/
public float getAzimuth() {
return azimuth;
}
/**
* Sets the azimuth of the light. The azimuth is the direction angle
* for the light source on the XY plane, in degrees.
*
* Min: n/a
* Max: n/a
* Default: 0.0
* Identity: n/a
*
*
* @param azimuth the azimuth of the light, in degrees
*/
public void setAzimuth(float azimuth) {
this.azimuth = azimuth;
}
/**
* Returns the elevation of the light. The elevation is the
* direction angle for the light source on the YZ plane, in degrees.
*
* @return the elevation of the light, in degrees
*/
public float getElevation() {
return elevation;
}
/**
* Sets the elevation of the light. The elevation is the
* direction angle for the light source on the YZ plane, in degrees.
*
* Min: n/a
* Max: n/a
* Default: 0.0
* Identity: n/a
*
*
* @param elevation the elevation of the light, in degrees
*/
public void setElevation(float elevation) {
this.elevation = elevation;
}
@Override
public float[] getNormalizedLightPosition() {
double a = Math.toRadians(azimuth);
double e = Math.toRadians(elevation);
float x = (float)(Math.cos(a) * Math.cos(e));
float y = (float)(Math.sin(a) * Math.cos(e));
float z = (float)(Math.sin(e));
// normalize
float len = (float)Math.sqrt(x*x + y*y + z*z);
if (len == 0f) len = 1f;
float[] pos = new float[] {x/len, y/len, z/len};
return pos;
}
}