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Diffstat (limited to 'mesalib/src/glu/sgi/libnurbs/nurbtess/partitionX.cc')
| -rw-r--r-- | mesalib/src/glu/sgi/libnurbs/nurbtess/partitionX.cc | 162 |
1 files changed, 0 insertions, 162 deletions
diff --git a/mesalib/src/glu/sgi/libnurbs/nurbtess/partitionX.cc b/mesalib/src/glu/sgi/libnurbs/nurbtess/partitionX.cc deleted file mode 100644 index e25e30b0f..000000000 --- a/mesalib/src/glu/sgi/libnurbs/nurbtess/partitionX.cc +++ /dev/null @@ -1,162 +0,0 @@ -/* -** License Applicability. Except to the extent portions of this file are -** made subject to an alternative license as permitted in the SGI Free -** Software License B, Version 1.1 (the "License"), the contents of this -** file are subject only to the provisions of the License. You may not use -** this file except in compliance with the License. You may obtain a copy -** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600 -** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at: -** -** http://oss.sgi.com/projects/FreeB -** -** Note that, as provided in the License, the Software is distributed on an -** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS -** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND -** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A -** PARTICULAR PURPOSE, AND NON-INFRINGEMENT. -** -** Original Code. The Original Code is: OpenGL Sample Implementation, -** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics, -** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc. -** Copyright in any portions created by third parties is as indicated -** elsewhere herein. All Rights Reserved. -** -** Additional Notice Provisions: The application programming interfaces -** established by SGI in conjunction with the Original Code are The -** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released -** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version -** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X -** Window System(R) (Version 1.3), released October 19, 1998. This software -** was created using the OpenGL(R) version 1.2.1 Sample Implementation -** published by SGI, but has not been independently verified as being -** compliant with the OpenGL(R) version 1.2.1 Specification. -** -*/ -/* -*/ - -#include <stdlib.h> -#include <stdio.h> - -#include "partitionX.h" - -#define CONCAVITY_ZERO 1.0e-6 //this number is used to test whether a vertex is concave (refelx) - //or not. The test needs to compute the area of the three adjacent - //vertices to see if the are is positive or negative. - -Int isCuspX(directedLine *v) -{ - //if v->prev <= v && v->next <= v - //|| v->prev >= v && v->next >= v - Real* T = v->head(); - Real* P = v->getPrev()->head(); - Real* N = v->getNext()->head(); - if( - (compV2InX(T,P) != -1 && - compV2InX(T,N) != -1 - ) || - (compV2InX(T,P) != 1 && - compV2InX(T,N) != 1 - ) - ) - return 1; - else - return 0; -} - -Int isReflexX(directedLine* v) -{ - Real* A = v->getPrev()->head(); - Real* B = v->head(); - Real* C = v->tail(); - Real Bx,By, Cx, Cy; - //scale them in case they are too small - Bx = 10*(B[0] - A[0]); - By = 10*(B[1] - A[1]); - Cx = 10*(C[0] - A[0]); - Cy = 10*(C[1] - A[1]); - - if(Bx*Cy - Cx*By < -CONCAVITY_ZERO) return 1; - else return 0; -} - - -/*return - *0: not-cusp - *1: interior cusp - *2: exterior cusp - */ -Int cuspTypeX(directedLine *v) -{ - if(! isCuspX(v)) return 0; - else - { -//printf("isCusp,%f,%f\n", v->head()[0], v->head()[1]); - if(isReflexX(v)) - { -// printf("isReflex\n"); - return 1; - } - else - { -// printf("not isReflex\n"); - return 2; - } - } -} - -Int numInteriorCuspsX(directedLine *polygon) -{ - directedLine *temp; - int ret = 0; - if(cuspTypeX(polygon) == 1) - ret++; - for(temp = polygon->getNext(); temp != polygon; temp = temp->getNext()) - if(cuspTypeX(temp) == 1) - ret++; - return ret; -} - - -void findInteriorCuspsX(directedLine *polygon, Int& ret_n_interior_cusps, - directedLine** ret_interior_cusps) -{ - directedLine *temp; - ret_n_interior_cusps = 0; - if(cuspTypeX(polygon) == 1) - { - ret_interior_cusps[ret_n_interior_cusps++] = polygon; - } - for(temp = polygon->getNext(); temp != polygon; temp = temp->getNext()) - if(cuspTypeX(temp) == 1) - { - ret_interior_cusps[ret_n_interior_cusps++] = temp; - } -} - -directedLine* findDiagonal_singleCuspX(directedLine* cusp) -{ - directedLine* temp; - Int is_minimal = ((compV2InX(cusp->head(), cusp->tail()) == -1)? 1:0); - - if(is_minimal) - for(temp = cusp->getNext(); temp != cusp; temp = temp->getNext()) - { - if(compV2InX(cusp->head(), temp->head()) == 1) - { - return temp; - } - } - else //is maxmal - for(temp = cusp->getNext(); temp != cusp; temp = temp->getNext()) - { - if(compV2InX(cusp->head(), temp->head()) == -1) - { - return temp; - } - } - return NULL; -} - - - |