mirror of
https://github.com/NGSolve/netgen.git
synced 2024-09-22 17:52:50 +05:00
440 lines
8.3 KiB
C++
440 lines
8.3 KiB
C++
/*********************************************************************/
|
|
/* File: demoview.cpp */
|
|
/* Author: Robert, Joachim */
|
|
/* Date: 6. Mar. 2003 */
|
|
/*********************************************************************/
|
|
|
|
|
|
#include <mystdlib.h>
|
|
|
|
|
|
//#include <iostream.h>
|
|
#include <myadt.hpp>
|
|
#include <linalg.hpp>
|
|
#include <gprim.hpp>
|
|
#include <csg.hpp>
|
|
#include <geometry2d.hpp>
|
|
#include <stlgeom.hpp>
|
|
#include <meshing.hpp>
|
|
#include "inctcl.hpp"
|
|
#include <visual.hpp>
|
|
|
|
namespace netgen {
|
|
#include "demoview.hpp"
|
|
|
|
|
|
/*
|
|
static demokwstruct defkw[] =
|
|
{
|
|
{ TOK_TIME, "t" },
|
|
{ TOK_CAMPOS, "camerapos" },
|
|
{ TOK_CAMPOINT, "camerapointto" },
|
|
{ TOK_CAMUP, "cameraup" }
|
|
};
|
|
*/
|
|
|
|
|
|
static demoview_kwstruct demoview_defkw[] =
|
|
{
|
|
{ DTOK_TIME, "t" },
|
|
{ DTOK_CAMPOS, "camerapos" },
|
|
{ DTOK_CAMPOINT, "camerapointto" },
|
|
{ DTOK_CAMUP, "cameraup" }
|
|
};
|
|
|
|
|
|
DemoScanner :: DemoScanner (ifstream & ascanin)
|
|
{
|
|
scanin = &ascanin;
|
|
token = DTOK_END;
|
|
num_value = 0;
|
|
linenum = 1;
|
|
}
|
|
|
|
|
|
|
|
void DemoScanner :: ReadNext ()
|
|
{
|
|
char ch;
|
|
|
|
|
|
// whitespaces ueberspringen
|
|
do
|
|
{
|
|
scanin->get(ch);
|
|
|
|
if (ch == '\n')
|
|
linenum++;
|
|
|
|
// end of file reached
|
|
if (scanin->eof())
|
|
{
|
|
token = DTOK_END;
|
|
return;
|
|
}
|
|
|
|
// skip comment line
|
|
if (ch == '#')
|
|
{
|
|
while (ch != '\n')
|
|
{
|
|
scanin->get(ch);
|
|
if (scanin->eof())
|
|
{
|
|
token = DTOK_END;
|
|
return;
|
|
}
|
|
}
|
|
linenum++;
|
|
}
|
|
}
|
|
while (isspace(ch));
|
|
|
|
switch (ch)
|
|
{
|
|
case '(': case ')':
|
|
case '[': case ']':
|
|
case '-': case ':':
|
|
case '=': case ',':
|
|
case ';': case '+':
|
|
{
|
|
token = DEMOVIEW_TOKEN_TYPE (ch);
|
|
break;
|
|
}
|
|
|
|
default:
|
|
{
|
|
if (isdigit (ch) || ch == '.')
|
|
{
|
|
scanin->putback (ch);
|
|
(*scanin) >> num_value;
|
|
token = DTOK_NUM;
|
|
return;
|
|
}
|
|
|
|
if (isalpha (ch))
|
|
{
|
|
string_value = string (1, ch);
|
|
scanin->get(ch);
|
|
while (isalnum(ch))
|
|
{
|
|
string_value += ch;
|
|
scanin->get(ch);
|
|
}
|
|
scanin->putback (ch);
|
|
}
|
|
|
|
int nr = 0;
|
|
while (demoview_defkw[nr].kw)
|
|
{
|
|
if (string_value == demoview_defkw[nr].name)
|
|
{
|
|
token = demoview_defkw[nr].kw;
|
|
return;
|
|
}
|
|
nr++;
|
|
}
|
|
|
|
token = DTOK_STRING;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
|
|
void DemoScanner :: Error (const string & err)
|
|
{
|
|
stringstream errstr;
|
|
errstr << "Parsing error in line " << linenum << ": " << endl << err << endl;
|
|
throw string(errstr.str());
|
|
}
|
|
|
|
|
|
|
|
void ParseChar (DemoScanner & scan, char ch)
|
|
{
|
|
char str[2];
|
|
str[0] = ch;
|
|
str[1] = 0;
|
|
if (scan.GetToken() != DEMOVIEW_TOKEN_TYPE(ch))
|
|
scan.Error (string ("token '") + string(str) + string("' expected"));
|
|
scan.ReadNext();
|
|
}
|
|
|
|
|
|
|
|
double ParseNumber(DemoScanner & scan)
|
|
{
|
|
if (scan.GetToken() == '-')
|
|
{
|
|
scan.ReadNext();
|
|
return -ParseNumber (scan);
|
|
}
|
|
if (scan.GetToken() != DTOK_NUM) scan.Error ("number expected");
|
|
double val = scan.GetNumValue();
|
|
scan.ReadNext();
|
|
return val;
|
|
}
|
|
|
|
|
|
Vec<3> ParseVector (DemoScanner & scan)
|
|
{
|
|
Vec<3> s;
|
|
|
|
s(0) = ParseNumber (scan);
|
|
ParseChar (scan, ',');
|
|
|
|
s(1) = ParseNumber (scan);
|
|
ParseChar (scan, ',');
|
|
|
|
s(2) = ParseNumber (scan);
|
|
|
|
return s;
|
|
}
|
|
|
|
|
|
void ParseConstLineOrSpline (DemoScanner & scan, double * t, Vec<3> * s)
|
|
{
|
|
int np = 1;
|
|
|
|
scan.ReadNext();
|
|
ParseChar (scan, '(');
|
|
|
|
t[0] = ParseNumber (scan)*1000;
|
|
ParseChar (scan, ':');
|
|
|
|
s[0] = ParseVector (scan);
|
|
|
|
if (scan.GetToken() != DTOK_RP &&
|
|
scan.GetToken() != DTOK_SEMICOLON)
|
|
scan.Error (") or ; expected");
|
|
|
|
if (scan.GetToken() == DTOK_SEMICOLON)
|
|
{
|
|
np++;
|
|
|
|
scan.ReadNext();
|
|
|
|
t[1] = ParseNumber (scan)*1000;
|
|
ParseChar (scan, ':');
|
|
|
|
s[1] = ParseVector (scan);
|
|
|
|
if (scan.GetToken() != DTOK_RP &&
|
|
scan.GetToken() != DTOK_SEMICOLON)
|
|
scan.Error (") or ; expected");
|
|
|
|
if (scan.GetToken() == DTOK_SEMICOLON)
|
|
{
|
|
np++;
|
|
|
|
scan.ReadNext();
|
|
|
|
t[2] = ParseNumber (scan)*1000;
|
|
ParseChar (scan, ':');
|
|
|
|
s[2] = ParseVector (scan);
|
|
|
|
ParseChar (scan, ')');
|
|
ParseChar (scan, ';');
|
|
}
|
|
else if (scan.GetToken() == DTOK_RP)
|
|
{
|
|
scan.ReadNext();
|
|
ParseChar (scan, ';');
|
|
}
|
|
}
|
|
else if (scan.GetToken() == DTOK_RP)
|
|
{
|
|
scan.ReadNext();
|
|
ParseChar (scan, ';');
|
|
}
|
|
|
|
if (np == 1) // constant spline
|
|
{
|
|
t[1] = t[2] = t[0];
|
|
s[1] = s[2] = s[0];
|
|
}
|
|
if (np == 2) // linear spline
|
|
{
|
|
t[2] = t[1]; t[1] = 0.5*(t[0] + t[2]);
|
|
s[2] = s[1]; s[1] = 0.5*(s[0] + s[2]);
|
|
}
|
|
}
|
|
|
|
|
|
|
|
|
|
template <class S>
|
|
void InterpolationSpline<S> :: AddSpline(double t1, double t2, double t3, S s1, S s2, S s3)
|
|
{
|
|
int pos, i, j;
|
|
// find pos to insert interpotation point
|
|
for (pos = 0; pos < ip.Size() && ip[pos][0].GetT() < t1; pos++) ;
|
|
|
|
ip.SetSize( ip.Size()+1 );
|
|
for (i = ip.Size()-2; i >= pos; i--)
|
|
for (j = 0; j < 3; j++)
|
|
ip[i+1][j] = ip[i][j];
|
|
|
|
ip[pos][0].SetTS (t1, s1);
|
|
ip[pos][1].SetTS (t2, s2);
|
|
ip[pos][2].SetTS (t3, s3);
|
|
}
|
|
|
|
|
|
|
|
template <class S>
|
|
S InterpolationSpline<S> :: Evaluate (double t)
|
|
{
|
|
if (t < ip[0][0].GetT())
|
|
return (ip[0][0].GetS());
|
|
|
|
if (t > ip[ip.Size()-1][2].GetT())
|
|
{
|
|
finished = 1;
|
|
return (ip[ip.Size()-1][2].GetS());
|
|
}
|
|
|
|
int pos;
|
|
for (pos = 0; pos < ip.Size() && t >= ip[pos][0].GetT(); pos++) ;
|
|
pos--;
|
|
|
|
if (t >= ip[pos][0].GetT() && t <= ip[pos][2].GetT())
|
|
{
|
|
double t0 = ip[pos][0].GetT();
|
|
double t1 = ip[pos][2].GetT();
|
|
|
|
double t01 = (t-t0)/(t1-t0);
|
|
|
|
double b1, b2, b3, w;
|
|
|
|
b1 = (1-t01)*(1-t01);
|
|
b2 = sqrt(2.0) * t01 * (1-t01);
|
|
b3 = t01 * t01;
|
|
w = b1 + b2 + b3;
|
|
|
|
return ( (1/w) * (b1 * ip[pos][0].GetS() +
|
|
b2 * ip[pos][1].GetS() +
|
|
b3 * ip[pos][2].GetS()) );
|
|
}
|
|
else
|
|
return (ip[pos][2].GetS());
|
|
}
|
|
|
|
|
|
|
|
DemoView :: DemoView (const char * filename)
|
|
: campos( Vec<3>(5,0,0) ),
|
|
campoint ( Vec<3>(0,0,0) ),
|
|
camup ( Vec<3>(0,0,1) )
|
|
{
|
|
double time = 0;
|
|
|
|
ifstream istr;
|
|
istr.open(filename);
|
|
|
|
DemoScanner scan(istr);
|
|
|
|
double t[3];
|
|
Vec<3> s[3];
|
|
|
|
scan.ReadNext();
|
|
|
|
try
|
|
{
|
|
while (1)
|
|
{
|
|
if (scan.GetToken() == DTOK_END) break;
|
|
|
|
if (scan.GetToken() == DTOK_CAMPOS)
|
|
{
|
|
ParseConstLineOrSpline (scan, &t[0], &s[0]);
|
|
campos.AddSpline (time+t[0], time+t[1], time+t[2], s[0], s[1], s[2]);
|
|
}
|
|
|
|
else if (scan.GetToken() == DTOK_CAMUP)
|
|
{
|
|
ParseConstLineOrSpline (scan, &t[0], &s[0]);
|
|
camup.AddSpline (time+t[0], time+t[1], time+t[2], s[0], s[1], s[2]);
|
|
}
|
|
|
|
else if (scan.GetToken() == DTOK_CAMPOINT)
|
|
{
|
|
ParseConstLineOrSpline (scan, &t[0], &s[0]);
|
|
campoint.AddSpline (time+t[0], time+t[1], time+t[2], s[0], s[1], s[2]);
|
|
}
|
|
|
|
else if (scan.GetToken() == DTOK_TIME)
|
|
{
|
|
scan.ReadNext();
|
|
|
|
if (scan.GetToken() != DTOK_EQU &&
|
|
scan.GetToken() != DTOK_PLUS)
|
|
scan.Error ("= or += expected");
|
|
|
|
if (scan.GetToken() == DTOK_EQU)
|
|
{
|
|
scan.ReadNext();
|
|
time = ParseNumber (scan)*1000;
|
|
ParseChar (scan, ';');
|
|
}
|
|
else if (scan.GetToken() == DTOK_PLUS)
|
|
{
|
|
scan.ReadNext();
|
|
ParseChar (scan, '=');
|
|
time += ParseNumber (scan)*1000;
|
|
ParseChar (scan, ';');
|
|
}
|
|
}
|
|
|
|
else
|
|
{
|
|
cout << "read unidentified token " << scan.GetToken()
|
|
<< " string = " << scan.GetStringValue() << endl;
|
|
scan.ReadNext();
|
|
}
|
|
}
|
|
}
|
|
catch (string errstr)
|
|
{
|
|
cout << "caught error " << errstr << endl;
|
|
}
|
|
|
|
|
|
}
|
|
|
|
|
|
DemoView :: ~DemoView ()
|
|
{
|
|
;
|
|
}
|
|
|
|
int DemoView :: SetTime (double time)
|
|
{
|
|
/*
|
|
cout << "time = " << time << endl;
|
|
|
|
cout << "campos : " << campos.Evaluate (time) << endl;
|
|
cout << "campoint: " << campoint.Evaluate (time) << endl;
|
|
cout << "camup : " << camup.Evaluate (time) << endl;
|
|
*/
|
|
|
|
|
|
visual_scene -> LookAt ( Point<3>( campos.Evaluate (time)),
|
|
Point<3>(campoint.Evaluate (time)),
|
|
Point<3>( camup.Evaluate (time)) );
|
|
|
|
if (campos.IsFinished() &&
|
|
campoint.IsFinished() &&
|
|
camup.IsFinished())
|
|
{
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
}
|