Vojta Tomas vojtatom

## app.py
import duckdb
import flask

# Initialize Flask app
app = flask.Flask(__name__)

# Setup a global DuckDB connection with spatial extension loaded
# Connect to a persistent database file with the geometry data
config = {"allow_unsigned_extensions": "true"}
con = duckdb.connect("tiles.db", True, config)

## geoparquet.cpp
/*
 *  File: geoparquet.cpp
 *
 *  Purpose: A minimal example to build a GeoParquet file using Apache Arrow.
 *
 *  Prerequisites: The Apache Arrow library is needed and can be installed as follows
 *      $ git clone https://github.com/apache/arrow.git
 *      $ cd arrow/cpp
 *      $ mkdir build
 *      $ cd build

## rectilinear-snippet.csv

          
            x
                 y
                  z
                  vx
                vy
                vz

            
              0.10
                0.10
                 0.50
                 0.20
                1.99
                0.50

            
              0.10
                0.10
                -0.58
                 0.20
                1.99
               -0.58

            
              0.10
                0.10
                -1.66
                 0.20
                1.99
               -1.66

            
              60.00
               60.00
               -17.84
               -0.61
               -1.90
               -17.84

            
              60.00
               60.00
               -18.92
               -0.61
               -1.90
               -18.92

            
              60.00
               60.00
               -20.00
               -0.61
               -1.90
               -20.00

## ray-triangle.cpp
// Möller-Trumbore algorithm
// Find intersection point - from PBRT - www.pbrt.org
float intersect(Ray & ray, bool cullback,  float & b1, float & b2)
{
    vec3 e1(b - a), e2(c - a);
    vec3 pvec = cross(ray.dir, e2);
    float det = dot(e1, pvec);

    if (cullback)
    {

## sage2app.js
// SAGE2 is available for use under the SAGE2 Software License
//
// University of Illinois at Chicago's Electronic Visualization Laboratory (EVL)
// and University of Hawai'i at Manoa's Laboratory for Advanced Visualization and
// Applications (LAVA)
//
// See full text, terms and conditions in the LICENSE.txt included file
//
// Copyright (c) 2014
	import duckdb
	import flask

	# Initialize Flask app
	app = flask.Flask(__name__)

	# Setup a global DuckDB connection with spatial extension loaded
	# Connect to a persistent database file with the geometry data
	config = {"allow_unsigned_extensions": "true"}
	con = duckdb.connect("tiles.db", True, config)
	/*
	* File: geoparquet.cpp
	*
	* Purpose: A minimal example to build a GeoParquet file using Apache Arrow.
	*
	* Prerequisites: The Apache Arrow library is needed and can be installed as follows
	* $ git clone https://github.com/apache/arrow.git
	* $ cd arrow/cpp
	* $ mkdir build
	* $ cd build
x	y	z	vx	vy	vz
0.10	0.10	0.50	0.20	1.99	0.50
0.10	0.10	-0.58	0.20	1.99	-0.58
0.10	0.10	-1.66	0.20	1.99	-1.66
60.00	60.00	-17.84	-0.61	-1.90	-17.84
60.00	60.00	-18.92	-0.61	-1.90	-18.92
60.00	60.00	-20.00	-0.61	-1.90	-20.00
	// Möller-Trumbore algorithm
	// Find intersection point - from PBRT - www.pbrt.org
	float intersect(Ray & ray, bool cullback, float & b1, float & b2)
	{
	vec3 e1(b - a), e2(c - a);
	vec3 pvec = cross(ray.dir, e2);
	float det = dot(e1, pvec);

	if (cullback)
	{
	// SAGE2 is available for use under the SAGE2 Software License
	//
	// University of Illinois at Chicago's Electronic Visualization Laboratory (EVL)
	// and University of Hawai'i at Manoa's Laboratory for Advanced Visualization and
	// Applications (LAVA)
	//
	// See full text, terms and conditions in the LICENSE.txt included file
	//
	// Copyright (c) 2014