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Diffstat (limited to 'mesalib/src/glu/sgi/libnurbs/nurbtess/gridWrap.cc')
-rw-r--r-- | mesalib/src/glu/sgi/libnurbs/nurbtess/gridWrap.cc | 293 |
1 files changed, 0 insertions, 293 deletions
diff --git a/mesalib/src/glu/sgi/libnurbs/nurbtess/gridWrap.cc b/mesalib/src/glu/sgi/libnurbs/nurbtess/gridWrap.cc deleted file mode 100644 index 3c92039ba..000000000 --- a/mesalib/src/glu/sgi/libnurbs/nurbtess/gridWrap.cc +++ /dev/null @@ -1,293 +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 "gluos.h" -#include <stdlib.h> -#include <stdio.h> -#include <GL/gl.h> -#include "zlassert.h" -#include "gridWrap.h" - - -/*******************grid structure****************************/ -void gridWrap::print() -{ - printf("n_ulines = %i\n", n_ulines); - printf("n_vlines = %i\n", n_vlines); - printf("u_min=%f, umax=%f, vmin=%f, vmax=%f\n", u_min, u_max, v_min, v_max); -} - -gridWrap::gridWrap(Int nUlines, Real* uvals, - Int nVlines, Real* vvals) -{ - assert(nUlines>=2); - assert(nVlines>=2); - - is_uniform = 0; - n_ulines = nUlines; - n_vlines = nVlines; - u_min = uvals[0]; - u_max = uvals[nUlines-1]; - v_min = vvals[0]; - v_max = vvals[nVlines-1]; - u_values = (Real*) malloc(sizeof(Real) * n_ulines); - assert(u_values); - v_values = (Real*) malloc(sizeof(Real) * n_vlines); - assert(v_values); - - Int i; - for(i=0; i<n_ulines; i++) - u_values[i] = uvals[i]; - for(i=0; i<n_vlines; i++) - v_values[i] = vvals[i]; -} - -gridWrap::gridWrap(Int nUlines, Int nVlines, - Real uMin, Real uMax, - Real vMin, Real vMax - ) -{ - is_uniform = 1; - n_ulines = nUlines; - n_vlines = nVlines; - u_min = uMin; - u_max = uMax; - v_min = vMin; - v_max = vMax; - u_values = (Real*) malloc(sizeof(Real) * n_ulines); - assert(u_values); - v_values = (Real*) malloc(sizeof(Real) * n_vlines); - assert(v_values); - - Int i; - assert(nUlines>=2); - assert(nVlines>=2); - Real du = (uMax-uMin)/(nUlines-1); - Real dv = (vMax-vMin)/(nVlines-1); - - float tempu=uMin; - u_values[0] = tempu; - for(i=1; i<nUlines; i++) - { - tempu += du; - u_values[i] = tempu; - } - u_values[nUlines-1] = uMax; - - float tempv=vMin; - v_values[0] = tempv; - for(i=1; i<nVlines; i++) - { - tempv += dv; - v_values[i] = tempv; - } - v_values[nVlines-1] = vMax; -} - -gridWrap::~gridWrap() -{ - free(u_values); - free(v_values); -} - -void gridWrap::draw() -{ - int i,j; - glBegin(GL_POINTS); - for(i=0; i<n_ulines; i++) - for(j=0; j<n_vlines; j++) - glVertex2f(get_u_value(i), get_v_value(j)); - glEnd(); -} - -void gridWrap::outputFanWithPoint(Int v, Int uleft, Int uright, Real vert[2], primStream* pStream) -{ - Int i; - if(uleft >= uright) - return; //no triangles to output. - - pStream->begin(); - pStream->insert(vert); - - assert(vert[1] != v_values[v]); //don't output degenerate triangles - - if(vert[1] > v_values[v]) //vertex is above this grid line: notice the orientation - { - for(i=uleft; i<=uright; i++) - pStream->insert(u_values[i], v_values[v]); - } - else //vertex is below the grid line - { - for(i=uright; i>= uleft; i--) - pStream->insert(u_values[i], v_values[v]); - } - - pStream->end(PRIMITIVE_STREAM_FAN); -} - - - -/*each chain stores a number of consecutive - *V-lines within a grid. - *There is one grid vertex on each V-line. - * The total number of V-lines is: - * nVlines. - * with respect to the grid, the index of the first V-line is - * firstVlineIndex. - * So with respect to the grid, the index of the ith V-line is - * firstVlineIndex-i. - * the grid-index of the uline at the ith vline (recall that each vline has one grid point) - * is ulineIndices[i]. The u_value is cached in ulineValues[i], that is, - * ulineValues[i] = grid->get_u_value(ulineIndices[i]) - */ -gridBoundaryChain::gridBoundaryChain( - gridWrap* gr, - Int first_vline_index, - Int n_vlines, - Int* uline_indices, - Int* inner_indices - ) -: grid(gr), firstVlineIndex(first_vline_index), nVlines(n_vlines) -{ - ulineIndices = (Int*) malloc(sizeof(Int) * n_vlines); - assert(ulineIndices); - - innerIndices = (Int*) malloc(sizeof(Int) * n_vlines); - assert(innerIndices); - - vertices = (Real2*) malloc(sizeof(Real2) * n_vlines); - assert(vertices); - - - - Int i; - for(i=0; i<n_vlines; i++){ - ulineIndices[i] = uline_indices[i]; - innerIndices[i] = inner_indices[i]; - } - - for(i=0; i<n_vlines; i++){ - vertices[i][0] = gr->get_u_value(ulineIndices[i]); - vertices[i][1] = gr->get_v_value(first_vline_index-i); - } -} - -void gridBoundaryChain::draw() -{ - Int i; - glBegin(GL_LINE_STRIP); - for(i=0; i<nVlines; i++) - { - glVertex2fv(vertices[i]); - } - glEnd(); -} - -void gridBoundaryChain::drawInner() -{ - Int i; - for(i=1; i<nVlines; i++) - { - glBegin(GL_LINE_STRIP); - glVertex2f(grid->get_u_value(innerIndices[i]), get_v_value(i-1) ); - glVertex2f(grid->get_u_value(innerIndices[i]), get_v_value(i) ); - glEnd(); - } -} - -Int gridBoundaryChain::lookfor(Real v, Int i1, Int i2) -{ - Int mid; - while(i1 < i2-1) - { - mid = (i1+i2)/2; - if(v > vertices[mid][1]) - { - i2 = mid; - } - else - i1 = mid; - } - return i1; -} - -/*output the fan of the right end between grid line i-1 and grid line i*/ -void gridBoundaryChain::rightEndFan(Int i, primStream* pStream) -{ - Int j; - if(getUlineIndex(i) > getUlineIndex(i-1)) - { - pStream->begin(); - pStream->insert(get_vertex(i-1)); - for(j=getUlineIndex(i-1); j<= getUlineIndex(i); j++) - pStream->insert(grid->get_u_value(j), get_v_value(i)); - pStream->end(PRIMITIVE_STREAM_FAN); - } - else if(getUlineIndex(i) < getUlineIndex(i-1)) - { - pStream->begin(); - pStream->insert(get_vertex(i)); - for(j=getUlineIndex(i-1); j>= getUlineIndex(i); j--) - pStream->insert(grid->get_u_value(j), get_v_value(i-1)); - pStream->end(PRIMITIVE_STREAM_FAN); - } - //otherside, the two are equal, so there is no fan to output -} - - -/*output the fan of the left end between grid line i-1 and grid line i*/ -void gridBoundaryChain::leftEndFan(Int i, primStream* pStream) -{ - Int j; - if(getUlineIndex(i) < getUlineIndex(i-1)) - { - pStream->begin(); - pStream->insert(get_vertex(i-1)); - for(j=getUlineIndex(i); j<= getUlineIndex(i-1); j++) - pStream->insert(grid->get_u_value(j), get_v_value(i)); - pStream->end(PRIMITIVE_STREAM_FAN); - } - else if(getUlineIndex(i) > getUlineIndex(i-1)) - { - pStream->begin(); - pStream->insert(get_vertex(i)); - for(j=getUlineIndex(i); j>= getUlineIndex(i-1); j--) - pStream->insert(grid->get_u_value(j), get_v_value(i-1)); - pStream->end(PRIMITIVE_STREAM_FAN); - } - /*otherwisem, the two are equal, so there is no fan to outout*/ -} |