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408 lines
13 KiB
C++
408 lines
13 KiB
C++
/*
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** License Applicability. Except to the extent portions of this file are
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** made subject to an alternative license as permitted in the SGI Free
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** Software License B, Version 1.1 (the "License"), the contents of this
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** file are subject only to the provisions of the License. You may not use
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** this file except in compliance with the License. You may obtain a copy
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** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
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** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
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**
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** http://oss.sgi.com/projects/FreeB
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**
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** Note that, as provided in the License, the Software is distributed on an
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** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
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** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
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** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
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** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
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**
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** Original Code. The Original Code is: OpenGL Sample Implementation,
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** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
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** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
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** Copyright in any portions created by third parties is as indicated
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** elsewhere herein. All Rights Reserved.
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**
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** Additional Notice Provisions: The application programming interfaces
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** established by SGI in conjunction with the Original Code are The
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** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
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** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
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** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
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** Window System(R) (Version 1.3), released October 19, 1998. This software
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** was created using the OpenGL(R) version 1.2.1 Sample Implementation
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** published by SGI, but has not been independently verified as being
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** compliant with the OpenGL(R) version 1.2.1 Specification.
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*/
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/*
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* glsurfeval.h
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*
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*/
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#ifndef __gluglsurfeval_h_
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#define __gluglsurfeval_h_
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#include "basicsurfeval.h"
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#include "bezierPatchMesh.h" //in case output triangles
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#include <GL/gl.h>
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#include <GL/glu.h>
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class SurfaceMap;
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class OpenGLSurfaceEvaluator;
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class StoredVertex;
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#define TYPECOORD 1
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#define TYPEPOINT 2
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/* Cache up to 3 vertices from tmeshes */
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#define VERTEX_CACHE_SIZE 3
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/*for internal evaluator callback stuff*/
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#ifndef IN_MAX_BEZIER_ORDER
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#define IN_MAX_BEZIER_ORDER 40 /*XXX should be bigger than machine order*/
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#endif
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#ifndef IN_MAX_DIMENSION
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#define IN_MAX_DIMENSION 4
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#endif
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typedef struct surfEvalMachine{
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REAL uprime;//cached previusly evaluated uprime.
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REAL vprime;
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int k; /*the dimension*/
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REAL u1;
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REAL u2;
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int ustride;
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int uorder;
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REAL v1;
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REAL v2;
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int vstride;
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int vorder;
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REAL ctlPoints[IN_MAX_BEZIER_ORDER*IN_MAX_BEZIER_ORDER*IN_MAX_DIMENSION];
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REAL ucoeff[IN_MAX_BEZIER_ORDER]; /*cache the polynomial values*/
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REAL vcoeff[IN_MAX_BEZIER_ORDER];
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REAL ucoeffDeriv[IN_MAX_BEZIER_ORDER]; /*cache the polynomial derivatives*/
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REAL vcoeffDeriv[IN_MAX_BEZIER_ORDER];
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} surfEvalMachine;
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class StoredVertex {
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public:
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StoredVertex() { type = 0; }
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~StoredVertex(void) {}
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void saveEvalCoord(REAL x, REAL y)
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{coord[0] = x; coord[1] = y; type = TYPECOORD; }
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void saveEvalPoint(long x, long y)
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{point[0] = x; point[1] = y; type = TYPEPOINT; }
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void invoke(OpenGLSurfaceEvaluator *eval);
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private:
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int type;
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REAL coord[2];
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long point[2];
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};
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class OpenGLSurfaceEvaluator : public BasicSurfaceEvaluator {
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public:
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OpenGLSurfaceEvaluator();
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virtual ~OpenGLSurfaceEvaluator( void );
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void polymode( long style );
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void range2f( long, REAL *, REAL * );
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void domain2f( REAL, REAL, REAL, REAL );
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void addMap( SurfaceMap * ) { }
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void enable( long );
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void disable( long );
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void bgnmap2f( long );
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void map2f( long, REAL, REAL, long, long,
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REAL, REAL, long, long, REAL * );
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void mapgrid2f( long, REAL, REAL, long, REAL, REAL );
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void mapmesh2f( long, long, long, long, long );
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void evalcoord2f( long, REAL, REAL );
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void evalpoint2i( long, long );
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void endmap2f( void );
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void bgnline( void );
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void endline( void );
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void bgnclosedline( void );
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void endclosedline( void );
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void bgntmesh( void );
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void swaptmesh( void );
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void endtmesh( void );
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void bgnqstrip( void );
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void endqstrip( void );
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void bgntfan( void );
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void endtfan( void );
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void evalUStrip(int n_upper, REAL v_upper, REAL* upper_val,
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int n_lower, REAL v_lower, REAL* lower_val);
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void evalVStrip(int n_left, REAL u_left, REAL* left_val,
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int n_right, REAL u_right, REAL* right_val);
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void coord2f( REAL, REAL );
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void point2i( long, long );
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void newtmeshvert( REAL, REAL );
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void newtmeshvert( long, long );
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#ifdef _WIN32
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void putCallBack(GLenum which, void (APIENTRY *fn)() );
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#else
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void putCallBack(GLenum which, _GLUfuncptr fn );
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#endif
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int get_vertices_call_back()
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{
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return output_triangles;
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}
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void put_vertices_call_back(int flag)
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{
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output_triangles = flag;
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}
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void put_callback_auto_normal(int flag)
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{
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callback_auto_normal = flag;
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}
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int get_callback_auto_normal()
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{
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return callback_auto_normal;
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}
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void set_callback_userData(void* data)
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{
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userData = data;
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}
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/**************begin for LOD_eval_list***********/
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void LOD_eval_list(int level);
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private:
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StoredVertex *vertexCache[VERTEX_CACHE_SIZE];
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int tmeshing;
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int which;
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int vcount;
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GLint gl_polygon_mode[2];/*to save and restore so that
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*no side effect
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*/
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bezierPatchMesh *global_bpm; //for output triangles
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int output_triangles; //true 1 or false 0
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void (GLAPIENTRY *beginCallBackN) (GLenum type);
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void (GLAPIENTRY *endCallBackN) (void);
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void (GLAPIENTRY *vertexCallBackN) (const GLfloat *vert);
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void (GLAPIENTRY *normalCallBackN) (const GLfloat *normal);
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void (GLAPIENTRY *colorCallBackN) (const GLfloat *color);
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void (GLAPIENTRY *texcoordCallBackN) (const GLfloat *texcoord);
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void (GLAPIENTRY *beginCallBackData) (GLenum type, void* data);
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void (GLAPIENTRY *endCallBackData) (void* data);
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void (GLAPIENTRY *vertexCallBackData) (const GLfloat *vert, void* data);
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void (GLAPIENTRY *normalCallBackData) (const GLfloat *normal, void* data);
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void (GLAPIENTRY *colorCallBackData) (const GLfloat *color, void* data);
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void (GLAPIENTRY *texcoordCallBackData) (const GLfloat *texcoord, void* data);
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void beginCallBack (GLenum type, void* data);
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void endCallBack (void* data);
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void vertexCallBack (const GLfloat *vert, void* data);
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void normalCallBack (const GLfloat *normal, void* data);
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void colorCallBack (const GLfloat *color, void* data);
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void texcoordCallBack (const GLfloat *texcoord, void* data);
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void* userData; //the opaque pointer for Data callback functions.
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/*LOD evaluation*/
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void LOD_triangle(REAL A[2], REAL B[2], REAL C[2],
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int level);
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void LOD_eval(int num_vert, REAL* verts, int type, int level);
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int LOD_eval_level; //set by LOD_eval_list()
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/*************begin for internal evaluators*****************/
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/*the following global variables are only defined in this file.
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*They are used to cache the precomputed Bezier polynomial values.
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*These calues may be used consecutively in which case we don't have
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*recompute these values again.
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*/
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int global_uorder; /*store the uorder in the previous evaluation*/
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int global_vorder; /*store the vorder in the previous evaluation*/
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REAL global_uprime;
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REAL global_vprime;
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REAL global_vprime_BV;
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REAL global_uprime_BU;
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int global_uorder_BV; /*store the uorder in the previous evaluation*/
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int global_vorder_BV; /*store the vorder in the previous evaluation*/
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int global_uorder_BU; /*store the uorder in the previous evaluation*/
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int global_vorder_BU; /*store the vorder in the previous evaluation*/
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REAL global_ucoeff[IN_MAX_BEZIER_ORDER]; /*cache the polynomial values*/
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REAL global_vcoeff[IN_MAX_BEZIER_ORDER];
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REAL global_ucoeffDeriv[IN_MAX_BEZIER_ORDER]; /*cache the polynomial derivatives*/
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REAL global_vcoeffDeriv[IN_MAX_BEZIER_ORDER];
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REAL global_BV[IN_MAX_BEZIER_ORDER][IN_MAX_DIMENSION];
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REAL global_PBV[IN_MAX_BEZIER_ORDER][IN_MAX_DIMENSION];
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REAL global_BU[IN_MAX_BEZIER_ORDER][IN_MAX_DIMENSION];
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REAL global_PBU[IN_MAX_BEZIER_ORDER][IN_MAX_DIMENSION];
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REAL* global_baseData;
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int global_ev_k; /*the dimension*/
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REAL global_ev_u1;
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REAL global_ev_u2;
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int global_ev_ustride;
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int global_ev_uorder;
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REAL global_ev_v1;
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REAL global_ev_v2;
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int global_ev_vstride;
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int global_ev_vorder;
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REAL global_ev_ctlPoints[IN_MAX_BEZIER_ORDER*IN_MAX_BEZIER_ORDER*IN_MAX_DIMENSION];
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REAL global_grid_u0;
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REAL global_grid_u1;
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int global_grid_nu;
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REAL global_grid_v0;
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REAL global_grid_v1;
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int global_grid_nv;
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/*functions*/
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void inDoDomain2WithDerivs(int k, REAL u, REAL v,
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REAL u1, REAL u2, int uorder,
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REAL v1, REAL v2, int vorder,
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REAL *baseData,
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REAL *retPoint, REAL *retdu, REAL *retdv);
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void inPreEvaluate(int order, REAL vprime, REAL *coeff);
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void inPreEvaluateWithDeriv(int order, REAL vprime, REAL *coeff, REAL *coeffDeriv);
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void inComputeFirstPartials(REAL *p, REAL *pu, REAL *pv);
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void inComputeNormal2(REAL *pu, REAL *pv, REAL *n);
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void inDoEvalCoord2(REAL u, REAL v,
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REAL *retPoint, REAL *retNormal);
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void inDoEvalCoord2NOGE(REAL u, REAL v,
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REAL *retPoint, REAL *retNormal);
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void inMap2f(int k,
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REAL ulower,
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REAL uupper,
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int ustride,
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int uorder,
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REAL vlower,
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REAL vupper,
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int vstride,
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int vorder,
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REAL *ctlPoints);
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void inMapGrid2f(int nu, REAL u0, REAL u1,
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int nv, REAL v0, REAL v1);
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void inEvalMesh2(int lowU, int lowV, int highU, int highV);
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void inEvalPoint2(int i, int j);
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void inEvalCoord2f(REAL u, REAL v);
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void inEvalULine(int n_points, REAL v, REAL* u_vals,
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int stride, REAL ret_points[][3], REAL ret_normals[][3]);
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void inEvalVLine(int n_points, REAL u, REAL* v_vals,
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int stride, REAL ret_points[][3], REAL ret_normals[][3]);
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void inEvalUStrip(int n_upper, REAL v_upper, REAL* upper_val,
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int n_lower, REAL v_lower, REAL* lower_val
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);
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void inEvalVStrip(int n_left, REAL u_left, REAL* left_val, int n_right, REAL u_right, REAL* right_val);
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void inPreEvaluateBV(int k, int uorder, int vorder, REAL vprime, REAL *baseData);
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void inPreEvaluateBU(int k, int uorder, int vorder, REAL uprime, REAL *baseData);
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void inPreEvaluateBV_intfac(REAL v )
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{
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inPreEvaluateBV(global_ev_k, global_ev_uorder, global_ev_vorder, (v-global_ev_v1)/(global_ev_v2-global_ev_v1), global_ev_ctlPoints);
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}
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void inPreEvaluateBU_intfac(REAL u)
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{
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inPreEvaluateBU(global_ev_k, global_ev_uorder, global_ev_vorder, (u-global_ev_u1)/(global_ev_u2-global_ev_u1), global_ev_ctlPoints);
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}
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void inDoDomain2WithDerivsBV(int k, REAL u, REAL v,
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REAL u1, REAL u2, int uorder,
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REAL v1, REAL v2, int vorder,
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REAL *baseData,
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REAL *retPoint, REAL* retdu, REAL *retdv);
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void inDoDomain2WithDerivsBU(int k, REAL u, REAL v,
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REAL u1, REAL u2, int uorder,
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REAL v1, REAL v2, int vorder,
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REAL *baseData,
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REAL *retPoint, REAL* retdu, REAL *retdv);
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void inDoEvalCoord2NOGE_BV(REAL u, REAL v,
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REAL *retPoint, REAL *retNormal);
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void inDoEvalCoord2NOGE_BU(REAL u, REAL v,
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REAL *retPoint, REAL *retNormal);
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void inBPMEval(bezierPatchMesh* bpm);
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void inBPMListEval(bezierPatchMesh* list);
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/*-------------begin for surfEvalMachine -------------*/
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surfEvalMachine em_vertex;
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surfEvalMachine em_normal;
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surfEvalMachine em_color;
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surfEvalMachine em_texcoord;
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int auto_normal_flag; //whether to output normla or not in callback
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//determined by GL_AUTO_NORMAL and callback_auto_normal
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int callback_auto_normal; //GLU_CALLBACK_AUTO_NORMAL_EXT
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int vertex_flag;
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int normal_flag;
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int color_flag;
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int texcoord_flag;
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void inMap2fEM(int which, //0:vert,1:norm,2:color,3:tex
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int dimension,
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REAL ulower,
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REAL uupper,
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int ustride,
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int uorder,
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REAL vlower,
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REAL vupper,
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int vstride,
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int vorder,
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REAL *ctlPoints);
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void inDoDomain2WithDerivsEM(surfEvalMachine *em, REAL u, REAL v,
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REAL *retPoint, REAL *retdu, REAL *retdv);
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void inDoDomain2EM(surfEvalMachine *em, REAL u, REAL v,
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REAL *retPoint);
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void inDoEvalCoord2EM(REAL u, REAL v);
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void inBPMEvalEM(bezierPatchMesh* bpm);
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void inBPMListEvalEM(bezierPatchMesh* list);
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/*-------------end for surfEvalMachine -------------*/
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/*************end for internal evaluators*****************/
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};
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inline void StoredVertex::invoke(OpenGLSurfaceEvaluator *eval)
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{
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switch(type) {
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case TYPECOORD:
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eval->coord2f(coord[0], coord[1]);
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break;
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case TYPEPOINT:
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eval->point2i(point[0], point[1]);
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break;
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default:
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break;
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}
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}
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#endif /* __gluglsurfeval_h_ */
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