diff options
Diffstat (limited to 'src/glu/sgi/libnurbs/interface/incurveeval.cc')
| -rw-r--r-- | src/glu/sgi/libnurbs/interface/incurveeval.cc | 206 |
1 files changed, 0 insertions, 206 deletions
diff --git a/src/glu/sgi/libnurbs/interface/incurveeval.cc b/src/glu/sgi/libnurbs/interface/incurveeval.cc deleted file mode 100644 index 96ea8896ae7..00000000000 --- a/src/glu/sgi/libnurbs/interface/incurveeval.cc +++ /dev/null @@ -1,206 +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 "glcurveval.h" - - -/* - *compute the Bezier polynomials C[n,j](v) for all j at v with - *return values stored in coeff[], where - * C[n,j](v) = (n,j) * v^j * (1-v)^(n-j), - * j=0,1,2,...,n. - *order : n+1 - *vprime: v - *coeff : coeff[j]=C[n,j](v), this array store the returned values. - *The algorithm is a recursive scheme: - * C[0,0]=1; - * C[n,j](v) = (1-v)*C[n-1,j](v) + v*C[n-1,j-1](v), n>=1 - *This code is copied from opengl/soft/so_eval.c:PreEvaluate - */ -void OpenGLCurveEvaluator::inPreEvaluate(int order, REAL vprime, REAL *coeff) -{ - int i, j; - REAL oldval, temp; - REAL oneMinusvprime; - - /* - * Minor optimization - * Compute orders 1 and 2 outright, and set coeff[0], coeff[1] to - * their i==1 loop values to avoid the initialization and the i==1 loop. - */ - if (order == 1) { - coeff[0] = 1.0; - return; - } - - oneMinusvprime = 1-vprime; - coeff[0] = oneMinusvprime; - coeff[1] = vprime; - if (order == 2) return; - - for (i = 2; i < order; i++) { - oldval = coeff[0] * vprime; - coeff[0] = oneMinusvprime * coeff[0]; - for (j = 1; j < i; j++) { - temp = oldval; - oldval = coeff[j] * vprime; - coeff[j] = temp + oneMinusvprime * coeff[j]; - } - coeff[j] = oldval; - } -} - -void OpenGLCurveEvaluator::inMap1f(int which, //0: vert, 1: norm, 2: color, 3: tex - int k, //dimension - REAL ulower, - REAL uupper, - int ustride, - int uorder, - REAL *ctlpoints) -{ - int i,x; - curveEvalMachine *temp_em; - switch(which){ - case 0: //vertex - vertex_flag = 1; - temp_em = &em_vertex; - break; - case 1: //normal - normal_flag = 1; - temp_em = &em_normal; - break; - case 2: //color - color_flag = 1; - temp_em = &em_color; - break; - default: - texcoord_flag = 1; - temp_em = &em_texcoord; - break; - } - - REAL *data = temp_em->ctlpoints; - temp_em->uprime = -1; //initialized - temp_em->k = k; - temp_em->u1 = ulower; - temp_em->u2 = uupper; - temp_em->ustride = ustride; - temp_em->uorder = uorder; - /*copy the control points*/ - for(i=0; i<uorder; i++){ - for(x=0; x<k; x++){ - data[x] = ctlpoints[x]; - } - ctlpoints += ustride; - data += k; - } -} - -void OpenGLCurveEvaluator::inDoDomain1(curveEvalMachine *em, REAL u, REAL *retPoint) -{ - int j, row; - REAL the_uprime; - REAL *data; - - if(em->u2 == em->u1) - return; - the_uprime = (u-em->u1) / (em->u2-em->u1); - /*use already cached values if possible*/ - if(em->uprime != the_uprime){ - inPreEvaluate(em->uorder, the_uprime, em->ucoeff); - em->uprime = the_uprime; - } - - for(j=0; j<em->k; j++){ - data = em->ctlpoints+j; - retPoint[j] = 0.0; - for(row=0; row<em->uorder; row++) - { - retPoint[j] += em->ucoeff[row] * (*data); - data += em->k; - } - } -} - -void OpenGLCurveEvaluator::inDoEvalCoord1(REAL u) -{ - REAL temp_vertex[4]; - REAL temp_normal[3]; - REAL temp_color[4]; - REAL temp_texcoord[4]; - if(texcoord_flag) //there is a texture map - { - inDoDomain1(&em_texcoord, u, temp_texcoord); - texcoordCallBack(temp_texcoord, userData); - } -#ifdef DEBUG -printf("color_flag = %i\n", color_flag); -#endif - if(color_flag) //there is a color map - { - inDoDomain1(&em_color, u, temp_color); - colorCallBack(temp_color, userData); - } - if(normal_flag) //there is a normal map - { - inDoDomain1(&em_normal, u, temp_normal); - normalCallBack(temp_normal, userData); - } - if(vertex_flag) - { - inDoDomain1(&em_vertex, u, temp_vertex); - vertexCallBack(temp_vertex, userData); - } -} - -void OpenGLCurveEvaluator::inMapMesh1f(int umin, int umax) -{ - REAL du, u; - int i; - if(global_grid_nu == 0) - return; //no points to output - du = (global_grid_u1 - global_grid_u0) / (REAL) global_grid_nu; - bgnline(); - for(i=umin; i<= umax; i++){ - u = (i==global_grid_nu)? global_grid_u1: global_grid_u0 + i*du; - inDoEvalCoord1(u); - } - endline(); -} |