61 lines
1.6 KiB
C++
61 lines
1.6 KiB
C++
#include "istd_util/tile_geometry.h"
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#include <cassert>
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#include <tuple>
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#include <vector>
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using namespace istd;
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int main() {
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// Test a simple horizontal segment
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Vec2 p1(0.5f, 1.2f);
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Vec2 p2(0.5f, 4.8f);
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std::vector<std::tuple<int, int>> result;
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for (auto [i, j] : tiles_on_segment(p1, p2)) {
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result.emplace_back(i, j);
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}
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// Should traverse columns 1 to 4, row 0
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assert(result.size() == 4);
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assert(result[0] == std::make_tuple(0, 1));
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assert(result[1] == std::make_tuple(0, 2));
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assert(result[2] == std::make_tuple(0, 3));
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assert(result[3] == std::make_tuple(0, 4));
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// Test a diagonal segment
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p1 = Vec2(1.1f, 1.1f);
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p2 = Vec2(3.9f, 3.9f);
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result.clear();
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for (auto [i, j] : tiles_on_segment(p1, p2)) {
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result.emplace_back(i, j);
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}
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// Should traverse (1,1), (2,2), (3,3)
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assert(result.size() == 3);
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assert(result[0] == std::make_tuple(1, 1));
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assert(result[1] == std::make_tuple(2, 2));
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assert(result[2] == std::make_tuple(3, 3));
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// Test vertical segment
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p1 = Vec2(2.2f, 0.5f);
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p2 = Vec2(5.7f, 0.5f);
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result.clear();
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for (auto [i, j] : tiles_on_segment(p1, p2)) {
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result.emplace_back(i, j);
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}
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// Should traverse rows 2 to 5, column 0
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assert(result.size() == 4);
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assert(result[0] == std::make_tuple(2, 0));
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assert(result[1] == std::make_tuple(3, 0));
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assert(result[2] == std::make_tuple(4, 0));
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assert(result[3] == std::make_tuple(5, 0));
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// Test single tile
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p1 = Vec2(7.3f, 8.9f);
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p2 = Vec2(7.7f, 8.1f);
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result.clear();
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for (auto [i, j] : tiles_on_segment(p1, p2)) {
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result.emplace_back(i, j);
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}
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assert(result.size() == 1);
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assert(result[0] == std::make_tuple(7, 8));
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return 0;
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}
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