everything everywhere

all at once

1 files changed, 51 insertions, 0 deletions

diff --git a/source/test/poly_test.cpp b/source/test/poly_test.cpp
new file mode 100644
index 0000000..6529b6d
--- /dev/null
+++ b/source/test/poly_test.cpp
@@ -0,0 +1,51 @@
+#include "StarPoly.hpp"
+#include "StarRandom.hpp"
+
+#include "gtest/gtest.h"
+
+using namespace Star;
+
+TEST(PolyTest, ConvexHull) {
+  PolyF::VertexList inputVertexes;
+  for (unsigned i = 0; i < 1000; ++i) {
+    float angle = Random::randf() * 2 * Constants::pi;
+    inputVertexes.append({sin(angle), cos(angle)});
+  }
+
+  PolyF convex = PolyF::convexHull(inputVertexes);
+
+  PolyF::VertexList testVertexes;
+  for (unsigned i = 0; i < 1000; ++i) {
+    float angle = Random::randf() * 2 * Constants::pi;
+    testVertexes.append({sin(angle) * 0.75f, cos(angle) * 0.75f});
+  }
+
+  for (auto const& vertex : testVertexes)
+    EXPECT_TRUE(convex.contains(vertex * 0.75f));
+}
+
+TEST(PolyTest, Distance) {
+  PolyF square = {{-1.0f, -1.0f}, {1.0f, -1.0f}, {1.0f, 1.0f}, {-1.0f, 1.0f}};
+
+  EXPECT_TRUE(fabs(square.distance({-2.0f, -2.0f}) - Constants::sqrt2) < 0.00001f);
+}
+
+TEST(PolyTest, LineCollision) {
+  PolyF square = {{-1.0f, -1.0f}, {1.0f, -1.0f}, {1.0f, 1.0f}, {-1.0f, 1.0f}};
+  EXPECT_TRUE(vmag(Vec2F(-1, 0) - square.lineIntersection(Line2F({-2, 0}, {2, 0}))->point) < 0.0001f);
+  EXPECT_TRUE(vmag(Vec2F(1, 0) - square.lineIntersection(Line2F({2, 0}, {-2, 0}))->point) < 0.0001f);
+}
+
+TEST(PolyTest, ConvexArea) {
+  PolyF triangle = {{-1.0f, -1.0f}, {1.0f, -1.0f}, {0.0f, 1.0f}};
+  EXPECT_TRUE(fabs(triangle.convexArea() - 2.0f) < 0.0001f);
+}
+
+TEST(PolyTest, Clipping) {
+  PolyF triangle1 = {{-2.0f, -1.0f}, {2.0f, -1.0f}, {0.0f, 1.0f}};
+  PolyF triangle2 = {{2.0f, 1.0f}, {-2.0f, 1.0f}, {0.0f, -1.0f}};
+  PolyF overlap = PolyF::clip(triangle1, triangle2);
+  overlap.deduplicateVertexes(0.0001f);
+  EXPECT_TRUE(overlap.sides() == 4);
+  EXPECT_TRUE(overlap.convexArea() - 2 < 0.0001f);
+}