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-rw-r--r--example.cc81
1 files changed, 45 insertions, 36 deletions
diff --git a/example.cc b/example.cc
index 22f5c19..c60ee6a 100644
--- a/example.cc
+++ b/example.cc
@@ -3,7 +3,7 @@
#include <cmath>
#include <algorithm>
-int minkowski_metric(double p, int refX, int refY, int x, int y) {
+int minkowski_metric(float p, int refX, int refY, int x, int y) {
return static_cast<int>(std::nearbyint(
std::pow(
std::pow(std::abs(refX - x), p) + std::pow(std::abs(refY - y), p),
@@ -12,48 +12,57 @@ int minkowski_metric(double p, int refX, int refY, int x, int y) {
));
}
-int euclidean_metric(int refX, int refY, int x, int y) {
- return minkowski_metric(2, refX, refY, x, y);
-}
-
int manhattan_metric(int refX, int refY, int x, int y) {
return minkowski_metric(1, refX, refY, x, y);
}
+int euclidean_metric(int refX, int refY, int x, int y) {
+ return minkowski_metric(2, refX, refY, x, y);
+}
+
int main(int, char*[]) {
- using refpos = std::tuple<int, int, imgen::color>;
-
- std::array<refpos, 9> ref{
- refpos( 0, 0, imgen::color(255, 0, 0 )),
- refpos( 100, 100, imgen::color(0, 255, 0 )),
- refpos(-100, 100, imgen::color(0, 0, 255 )),
- refpos( 100, -100, imgen::color(255, 255, 0 )),
- refpos(-100, -100, imgen::color(0, 255, 255 )),
- refpos( 200, 200, imgen::color(255, 0, 0 )),
- refpos(-200, 200, imgen::color(0, 255, 0 )),
- refpos( 200, -200, imgen::color(0, 255, 255 )),
- refpos(-200, -200, imgen::color(255, 255, 0 ))
+ std::array<imgen::colored_vector, 9> ref{
+ imgen::colored_vector{ 0, 0, imgen::red() },
+ imgen::colored_vector{ 240, 200, imgen::green() },
+ imgen::colored_vector{-100, 230, imgen::blue() },
+ imgen::colored_vector{ 120, -100, imgen::yellow() },
+ imgen::colored_vector{ -42, -200, imgen::cyan() },
+ imgen::colored_vector{ 120, 40, imgen::magenta()},
+ imgen::colored_vector{-150, 50, imgen::silver() },
+ imgen::colored_vector{ 60, -128, imgen::maroon() },
+ imgen::colored_vector{-240, -20, imgen::olive() }
};
- imgen::write_ppm(
- "test.ppm",
- 512,
- 512,
- [&ref](std::ptrdiff_t x, std::ptrdiff_t y) -> imgen::color {
- const refpos& nearest = *std::min_element(
- ref.begin(),
- ref.end(),
- [x, y](const refpos& a, const refpos& b) -> bool {
- return euclidean_metric(std::get<0>(a), std::get<1>(a), x, y)
- < euclidean_metric(std::get<0>(b), std::get<1>(b), x, y);
- }
- );
+ for ( float p = 0.6; p < 2.0; p = p + 0.005 ) {
+ imgen::write_ppm(
+ "vonoroi_" + std::to_string(p) + ".ppm",
+ 512,
+ 512,
+ [&ref, p](std::ptrdiff_t x, std::ptrdiff_t y) -> imgen::color {
+ std::array<int, 9> distances;
- if ( euclidean_metric(std::get<0>(nearest), std::get<1>(nearest), x, y) <= 5 ) {
- return imgen::color(0, 0, 0);
- } else {
- return std::get<2>(nearest);
+ std::transform(
+ ref.begin(),
+ ref.end(),
+ distances.begin(),
+ [x, y, p](const imgen::colored_vector& pos) {
+ return minkowski_metric(p, std::get<0>(pos), std::get<1>(pos), x, y);
+ });
+
+ const auto& minimal_distance = std::min_element(
+ distances.begin(),
+ distances.end()
+ );
+ const imgen::colored_vector& nearest = ref[
+ std::distance(distances.begin(), minimal_distance)
+ ];
+
+ if ( *minimal_distance <= 5 ) {
+ return imgen::color(0, 0, 0);
+ } else {
+ return std::get<2>(nearest);
+ }
}
- }
- );
+ );
+ }
}