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Isaac Brodsky
Fix compile warnings about format specifiers
/* | |
* Copyright 2017 Uber Technologies, Inc. | |
* | |
* Licensed under the Apache License, Version 2.0 (the "License"); | |
* you may not use this file except in compliance with the License. | |
* You may obtain a copy of the License at | |
* | |
* http://www.apache.org/licenses/LICENSE-2.0 | |
* | |
* Unless required by applicable law or agreed to in writing, software | |
* distributed under the License is distributed on an "AS IS" BASIS, | |
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
* See the License for the specific language governing permissions and | |
* limitations under the License. | |
*/ | |
/** | |
* Example program that converts coordinates to an H3 index (hexagon), | |
* and then finds the vertices and center coordinates of the index. | |
*/ | |
#include <h3/h3api.h> | |
#include <inttypes.h> | |
#include <stdio.h> | |
int main(int argc, char *argv[]) { | |
// Get the H3 index of some location and print it. | |
GeoCoord location; | |
location.lat = degsToRads(40.689167); | |
location.lon = degsToRads(-74.044444); | |
int resolution = 10; | |
H3Index indexed = geoToH3(&location, resolution); | |
printf("The index is: %" PRIx64 "\n", indexed); | |
// Get the vertices of the H3 index. | |
GeoBoundary boundary; | |
h3ToGeoBoundary(indexed, &boundary); | |
// Indexes can have different number of vertices under some cases, | |
// which is why boundary.numVerts is needed. | |
for (int v = 0; v < boundary.numVerts; v++) { | |
printf("Boundary vertex #%d: %lf, %lf\n", v, | |
radsToDegs(boundary.verts[v].lat), | |
radsToDegs(boundary.verts[v].lon)); | |
} | |
// Get the center coordinates. | |
GeoCoord center; | |
h3ToGeo(indexed, ¢er); | |
printf("Center coordinates: %lf, %lf\n", radsToDegs(center.lat), | |
radsToDegs(center.lon)); | |
} |