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Diffstat (limited to 'src/gleem/NormalCalc.java')
-rw-r--r-- | src/gleem/NormalCalc.java | 118 |
1 files changed, 0 insertions, 118 deletions
diff --git a/src/gleem/NormalCalc.java b/src/gleem/NormalCalc.java deleted file mode 100644 index 635bd78..0000000 --- a/src/gleem/NormalCalc.java +++ /dev/null @@ -1,118 +0,0 @@ -/* - * gleem -- OpenGL Extremely Easy-To-Use Manipulators. - * Copyright (C) 1998-2003 Kenneth B. Russell ([email protected]) - * - * Copying, distribution and use of this software in source and binary - * forms, with or without modification, is permitted provided that the - * following conditions are met: - * - * Distributions of source code must reproduce the copyright notice, - * this list of conditions and the following disclaimer in the source - * code header files; and Distributions of binary code must reproduce - * the copyright notice, this list of conditions and the following - * disclaimer in the documentation, Read me file, license file and/or - * other materials provided with the software distribution. - * - * The names of Sun Microsystems, Inc. ("Sun") and/or the copyright - * holder may not be used to endorse or promote products derived from - * this software without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED "AS IS," WITHOUT A WARRANTY OF ANY - * KIND. ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND - * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE, NON-INTERFERENCE, ACCURACY OF - * INFORMATIONAL CONTENT OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. THE - * COPYRIGHT HOLDER, SUN AND SUN'S LICENSORS SHALL NOT BE LIABLE FOR - * ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR - * DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL THE - * COPYRIGHT HOLDER, SUN OR SUN'S LICENSORS BE LIABLE FOR ANY LOST - * REVENUE, PROFIT OR DATA, OR FOR DIRECT, INDIRECT, SPECIAL, - * CONSEQUENTIAL, INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER CAUSED AND - * REGARDLESS OF THE THEORY OF LIABILITY, ARISING OUT OF THE USE OF OR - * INABILITY TO USE THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY - * OF SUCH DAMAGES. YOU ACKNOWLEDGE THAT THIS SOFTWARE IS NOT - * DESIGNED, LICENSED OR INTENDED FOR USE IN THE DESIGN, CONSTRUCTION, - * OPERATION OR MAINTENANCE OF ANY NUCLEAR FACILITY. THE COPYRIGHT - * HOLDER, SUN AND SUN'S LICENSORS DISCLAIM ANY EXPRESS OR IMPLIED - * WARRANTY OF FITNESS FOR SUCH USES. - */ - -package gleem; - -import java.util.*; - -import gleem.linalg.*; - -/** Calculates normals for a set of polygons. */ - -public class NormalCalc { - - /** Set of normals computed using {@link gleem.NormalCalc}. */ - public static class NormalInfo { - public Vec3f[] normals; - public int[] normalIndices; - - NormalInfo(Vec3f[] normals, int[] normalIndices) { - this.normals = normals; - this.normalIndices = normalIndices; - } - } - - /** Returns null upon failure, or a set of Vec3fs and integers - which represent faceted (non-averaged) normals, but per-vertex. - Performs bounds checking on indices with respect to vertex list. - Index list must represent independent triangles; indices are - taken in groups of three. If index list doesn't represent - triangles or other error occurred then returns null. ccw flag - indicates whether triangles are specified counterclockwise when - viewed from top or not. */ - - public static NormalInfo computeFacetedNormals(Vec3f[] vertices, - int[] indices, - boolean ccw) { - if ((indices.length % 3) != 0) { - System.err.println("NormalCalc.computeFacetedNormals: numIndices wasn't " + - "divisible by 3, so it can't possibly " + - "represent a set of triangles"); - return null; - } - - Vec3f[] outputNormals = new Vec3f[indices.length / 3]; - int[] outputNormalIndices = new int[indices.length]; - - Vec3f d1 = new Vec3f(); - Vec3f d2 = new Vec3f(); - int curNormalIndex = 0; - for (int i = 0; i < indices.length; i += 3) { - int i0 = indices[i]; - int i1 = indices[i+1]; - int i2 = indices[i+2]; - if ((i0 < 0) || (i0 >= indices.length) || - (i1 < 0) || (i1 >= indices.length) || - (i2 < 0) || (i2 >= indices.length)) { - System.err.println("NormalCalc.computeFacetedNormals: ERROR: " + - "vertex index out of bounds or no end of triangle " + - "index found"); - return null; - } - Vec3f v0 = vertices[i0]; - Vec3f v1 = vertices[i1]; - Vec3f v2 = vertices[i2]; - d1.sub(v1, v0); - d2.sub(v2, v0); - Vec3f n = new Vec3f(); - if (ccw) { - n.cross(d1, d2); - } else { - n.cross(d2, d1); - } - n.normalize(); - outputNormals[curNormalIndex] = n; - outputNormalIndices[i] = curNormalIndex; - outputNormalIndices[i+1] = curNormalIndex; - outputNormalIndices[i+2] = curNormalIndex; - curNormalIndex++; - } - return new NormalInfo(outputNormals, outputNormalIndices); - } -} |