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Diffstat (limited to 'src/glu/sgi/libnurbs/nurbtess/gridWrap.h')
| -rw-r--r-- | src/glu/sgi/libnurbs/nurbtess/gridWrap.h | 144 |
1 files changed, 144 insertions, 0 deletions
diff --git a/src/glu/sgi/libnurbs/nurbtess/gridWrap.h b/src/glu/sgi/libnurbs/nurbtess/gridWrap.h new file mode 100644 index 0000000000..1c8237fe27 --- /dev/null +++ b/src/glu/sgi/libnurbs/nurbtess/gridWrap.h @@ -0,0 +1,144 @@ +/* +** 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. +** +** $Date: 2001/03/17 00:25:41 $ $Revision: 1.1 $ +*/ +/* +** $Header: /home/krh/git/sync/mesa-cvs-repo/Mesa/src/glu/sgi/libnurbs/nurbtess/gridWrap.h,v 1.1 2001/03/17 00:25:41 brianp Exp $ +*/ + +#ifndef _GRIDWRAP_H +#define _GRIDWRAP_H + +#include <stdio.h> +#include "definitions.h" + +#include "primitiveStream.h" +#include "zlassert.h" + +class gridWrap{ + Int n_ulines; + Int n_vlines; + Real u_min, u_max; + Real v_min, v_max; + + /*cache the coordinate values for efficiency. + *these are redundant information when + *the grid is uniform. + */ + Real* u_values; /*size is n_ulines*/ + Real* v_values; /*size is n_vlines*/ + + Int is_uniform; + +public: + //uniform grid constructor + gridWrap(Int nUlines, Int nVlines, + Real uMin, Real uMax, + Real vMin, Real vMax + ); + + //nonuniform grid constructor. + gridWrap(Int nUlines, Real *uvals, + Int nVlines, Real *vvlas + ); + ~gridWrap(); + + void print(); + Int get_n_ulines() {return n_ulines;} + Int get_n_vlines() {return n_vlines;} + Real get_u_min() {return u_min;} + Real get_u_max() {return u_max;} + Real get_v_min() {return v_min;} + Real get_v_max() {return v_max;} + + Real get_u_value(Int i) + { + assert(i<n_ulines); + /*if(i>=n_ulines){printf("ERROR, n_ulines=%i,i=%i\n",n_ulines,i);exit(0);}*/ + return u_values[i];} + Real get_v_value(Int j) {return v_values[j];} + + Real* get_u_values() {return u_values;} + Real* get_v_values() {return v_values;} + + void outputFanWithPoint(Int v, Int uleft, Int uright, + Real vert[2], primStream* pStream); + + void draw(); + + Int isUniform() {return is_uniform;} +}; + +class gridBoundaryChain{ + gridWrap* grid; + Int firstVlineIndex; + Int nVlines; + Int* ulineIndices; /*each v line has a boundary*/ + Int* innerIndices; /*the segment of the vertical gridline from */ + /*(innerIndices[i], i) to (innerIndices[i+1], i-1) */ + /*is inside the polygon: i=1,...,nVlines-1*/ + + Real2* vertices; /*one grid point at each grid V-line, cached for efficiency*/ + +public: + gridBoundaryChain(gridWrap* gr, Int first_vline_index, Int n_vlines, Int* uline_indices, Int* inner_indices); + + ~gridBoundaryChain() + { + free(innerIndices); + free(ulineIndices); + free(vertices); + } + + /*i indexes the vlines in this chain. + */ + Int getVlineIndex(Int i) {return firstVlineIndex-i;} + Int getUlineIndex(Int i) {return ulineIndices[i];} + Real get_u_value(Int i) {return vertices[i][0];} + Real get_v_value(Int i) {return vertices[i][1];} + Int get_nVlines() {return nVlines;} + Int getInnerIndex(Int i) {return innerIndices[i];} + Real getInner_u_value(Int i) {return grid->get_u_value(innerIndices[i]);} + + Real* get_vertex(Int i) {return vertices[i];} + gridWrap* getGrid() {return grid;} + void leftEndFan(Int i, primStream* pStream); + void rightEndFan(Int i, primStream* pStream); + + Int lookfor(Real v, Int i1, Int i2); //find i in [i1,i2] so that vertices[i][1]>= v > vertices[i+1][1] + void draw(); + void drawInner(); +}; + +#endif |