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Diffstat (limited to 'src/libnoiseforjava/util/NoiseMapBuilderSphere.java')
-rw-r--r-- | src/libnoiseforjava/util/NoiseMapBuilderSphere.java | 195 |
1 files changed, 195 insertions, 0 deletions
diff --git a/src/libnoiseforjava/util/NoiseMapBuilderSphere.java b/src/libnoiseforjava/util/NoiseMapBuilderSphere.java new file mode 100644 index 0000000..0aa560a --- /dev/null +++ b/src/libnoiseforjava/util/NoiseMapBuilderSphere.java @@ -0,0 +1,195 @@ +/*
+ * Copyright (C) 2003, 2004 Jason Bevins (original libnoise code)
+ * Copyright 2010 Thomas J. Hodge (java port of libnoise)
+ *
+ * This file is part of libnoiseforjava.
+ *
+ * libnoiseforjava is a Java port of the C++ library libnoise, which may be found at
+ * http://libnoise.sourceforge.net/. libnoise was developed by Jason Bevins, who may be
+ * contacted at [email protected] (for great email, take off every 'zig').
+ * Porting to Java was done by Thomas Hodge, who may be contacted at
+ * [email protected] (remove every 'zag').
+ *
+ * libnoiseforjava is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free Software
+ * Foundation, either version 3 of the License, or (at your option) any later version.
+ *
+ * libnoiseforjava 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 for more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * libnoiseforjava. If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+package libnoiseforjava.util;
+
+import libnoiseforjava.exception.ExceptionInvalidParam;
+import libnoiseforjava.model.Sphere;
+
+public class NoiseMapBuilderSphere extends NoiseMapBuilder
+{
+ /// Builds a spherical noise map.
+ ///
+ /// This class builds a noise map by filling it with coherent-noise values
+ /// generated from the surface of a sphere.
+ ///
+ /// This class describes these input values using a (latitude, longitude)
+ /// coordinate system. After generating the coherent-noise value from the
+ /// input value, it then "flattens" these coordinates onto a plane so that
+ /// it can write the values into a two-dimensional noise map.
+ ///
+ /// The sphere model has a radius of 1.0 unit. Its center is at the
+ /// origin.
+ ///
+ /// The x coordinate in the noise map represents the longitude. The y
+ /// coordinate in the noise map represents the latitude.
+ ///
+ /// The application must provide the southern, northern, western, and
+ /// eastern bounds of the noise map, in degrees.
+
+ /// Eastern boundary of the spherical noise map, in degrees.
+ double eastLonBound;
+
+ /// Northern boundary of the spherical noise map, in degrees.
+ double northLatBound;
+
+ /// Southern boundary of the spherical noise map, in degrees.
+ double southLatBound;
+
+ /// Western boundary of the spherical noise map, in degrees.
+ double westLonBound;
+
+ public NoiseMapBuilderSphere () throws ExceptionInvalidParam
+ {
+ super();
+ eastLonBound = 0.0;
+ northLatBound = 0.0;
+ southLatBound = 0.0;
+ westLonBound = 0.0;
+ }
+
+ public void build () throws ExceptionInvalidParam
+ {
+ if ( eastLonBound <= westLonBound
+ || northLatBound <= southLatBound
+ || destWidth <= 0
+ || destHeight <= 0
+ || sourceModule == null
+ || destNoiseMap == null)
+ throw new ExceptionInvalidParam ("Invalid Parameter in NoiseMapBuilderSphere");
+
+
+ // Resize the destination noise map so that it can store the new output
+ // values from the source model.
+ destNoiseMap.setSize (destWidth, destHeight);
+
+ // Create the plane model.
+ Sphere sphereModel = new Sphere();
+ sphereModel.setModule (sourceModule);
+
+ double lonExtent = eastLonBound - westLonBound ;
+ double latExtent = northLatBound - southLatBound;
+ double xDelta = lonExtent / (double)destWidth ;
+ double yDelta = latExtent / (double)destHeight;
+ double curLon = westLonBound ;
+ double curLat = southLatBound;
+
+ // Fill every point in the noise map with the output values from the model.
+ for (int y = 0; y < destHeight; y++)
+ {
+ curLon = westLonBound;
+ for (int x = 0; x < destWidth; x++)
+ {
+ float curValue = (float)sphereModel.getValue (curLat, curLon);
+ destNoiseMap.setValue(x, y, curValue);
+ curLon += xDelta;
+ }
+ curLat += yDelta;
+ setCallback(y);
+
+ }
+ }
+
+ /// Returns the eastern boundary of the spherical noise map.
+ ///
+ /// @returns The eastern boundary of the noise map, in degrees.
+ public double getEastLonBound ()
+ {
+ return eastLonBound;
+ }
+
+ /// Returns the northern boundary of the spherical noise map
+ ///
+ /// @returns The northern boundary of the noise map, in degrees.
+ public double getNorthLatBound ()
+ {
+ return northLatBound;
+ }
+
+ /// Returns the southern boundary of the spherical noise map
+ ///
+ /// @returns The southern boundary of the noise map, in degrees.
+ public double getSouthLatBound ()
+ {
+ return southLatBound;
+ }
+
+ /// Returns the western boundary of the spherical noise map
+ ///
+ /// @returns The western boundary of the noise map, in degrees.
+ public double getWestLonBound ()
+ {
+ return westLonBound;
+ }
+
+ /// Sets the coordinate boundaries of the noise map.
+ ///
+ /// @param southLatBound The southern boundary of the noise map, in
+ /// degrees.
+ /// @param northLatBound The northern boundary of the noise map, in
+ /// degrees.
+ /// @param westLonBound The western boundary of the noise map, in
+ /// degrees.
+ /// @param eastLonBound The eastern boundary of the noise map, in
+ /// degrees.
+ ///
+ /// @pre The southern boundary is less than the northern boundary.
+ /// @pre The western boundary is less than the eastern boundary.
+ ///
+ /// @throw noise::ExceptionInvalidParam See the preconditions.
+ public void setBounds (double southLatBound, double northLatBound,
+ double westLonBound, double eastLonBound) throws ExceptionInvalidParam
+ {
+ if (southLatBound >= northLatBound
+ || westLonBound >= eastLonBound)
+ throw new ExceptionInvalidParam ("Invalid Parameter in NoiseMapBuilderSphere");
+
+ this.southLatBound = southLatBound;
+ this.northLatBound = northLatBound;
+ this.westLonBound = westLonBound ;
+ this.eastLonBound = eastLonBound ;
+ }
+
+ public void setEastLonBound(double eastLonBound)
+ {
+ this.eastLonBound = eastLonBound;
+ }
+
+ public void setNorthLatBound(double northLatBound)
+ {
+ this.northLatBound = northLatBound;
+ }
+
+ public void setSouthLatBound(double southLatBound)
+ {
+ this.southLatBound = southLatBound;
+ }
+
+ public void setWestLonBound(double westLonBound)
+ {
+ this.westLonBound = westLonBound;
+ }
+
+}
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