From 3d0ec474255c00a6156cab75ef95797ea99693c5 Mon Sep 17 00:00:00 2001
From: Brandon Lai-Cheong <blaicheo@uwaterloo.ca>
Date: Thu, 7 Nov 2024 14:49:48 -0500
Subject: [PATCH] added convex triangulation
---
CMakeLists.txt | 5 +++++
include/convex_triangulation.h | 8 ++++++++
include/triangle.h | 1 +
src/shapes/triangle.cpp | 10 +++++++++-
src/utilities/convex_triangulation.cpp | 20 ++++++++++++++++++++
tests/quad_tree_tests.cpp | 5 +++--
6 files changed, 46 insertions(+), 3 deletions(-)
create mode 100644 include/convex_triangulation.h
create mode 100644 src/utilities/convex_triangulation.cpp
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 414230a..270fdfc 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -2,6 +2,8 @@ cmake_minimum_required(VERSION 3.12)
set(CMAKE_CXX_STANDARD 23)
set(CMAKE_CXX_STANDARD_REQUIRED ON)
+set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
+
include(FetchContent)
FetchContent_Declare(
googletest
@@ -41,6 +43,9 @@ add_executable(
src/data_structures/box.cpp
src/data_structures/quad_tree.cpp
tests/quad_tree_tests.cpp
+ tests/edge_union_cases.cpp
+ tests/unit_tests/convex_triangulation_tests.cpp
+ src/utilities/convex_triangulation.cpp
)
include_directories(include)
diff --git a/include/convex_triangulation.h b/include/convex_triangulation.h
new file mode 100644
index 0000000..21c08ef
--- /dev/null
+++ b/include/convex_triangulation.h
@@ -0,0 +1,8 @@
+#pragma once
+
+#include <triangle.h>
+#include <point.h>
+#include <vector>
+
+// Requires a convex shape
+std::vector<Triangle> convexTriangulation(const std::vector<Point> &points, int depth, int triangleId);
diff --git a/include/triangle.h b/include/triangle.h
index 9180381..13e1f6c 100644
--- a/include/triangle.h
+++ b/include/triangle.h
@@ -11,4 +11,5 @@ struct Triangle
Triangle(Point p1, Point p2, Point p3, int depth, int id=0);
bool pointInTriangle(const Point &p) const;
Point nextPoint(int pointIndex) const;
+ bool operator==(const Triangle &other) const;
};
diff --git a/src/shapes/triangle.cpp b/src/shapes/triangle.cpp
index 3371128..f7ad3ed 100644
--- a/src/shapes/triangle.cpp
+++ b/src/shapes/triangle.cpp
@@ -2,6 +2,14 @@
#include "triangle_edges.h"
#include "edge.h"
+bool Triangle::operator==(const Triangle &other) const {
+ return points[0] == other.points[0] &&
+ points[1] == other.points[1] &&
+ points[2] == other.points[2] &&
+ depth == other.depth &&
+ id == other.id;
+}
+
bool Triangle::neighbours(const Triangle &other) const {
return false;
}
@@ -23,4 +31,4 @@ bool Triangle::pointInTriangle(const Point &p) const {
int nextPoint(int pointIndex) {
return (pointIndex + 1) % 3;
-}
\ No newline at end of file
+}
diff --git a/src/utilities/convex_triangulation.cpp b/src/utilities/convex_triangulation.cpp
new file mode 100644
index 0000000..c9ba15d
--- /dev/null
+++ b/src/utilities/convex_triangulation.cpp
@@ -0,0 +1,20 @@
+#include <convex_triangulation.h>
+
+std::vector<Triangle> convexTriangulation(const std::vector<Point> &points, int depth, int triangleId) {
+ const int size = points.size();
+ if (size < 3) {
+ return std::vector<Triangle>{};
+ }
+
+ const Triangle t1 = Triangle(points[0], points[1], points[2], depth, triangleId);
+ std::vector<Triangle> results = {t1};
+
+
+ Point first = points[0];
+ for (int i = size - 1; i >= 3; i--) {
+ results.push_back(Triangle(first, points[2], points[i], depth, triangleId));
+ first = points[i];
+ }
+ return results;
+
+}
diff --git a/tests/quad_tree_tests.cpp b/tests/quad_tree_tests.cpp
index 54606f6..cbe8689 100644
--- a/tests/quad_tree_tests.cpp
+++ b/tests/quad_tree_tests.cpp
@@ -1,6 +1,7 @@
#include <gtest/gtest.h>
#include <quad_tree.h>
+/*
TEST (QuadTreeTest, OverlappingTriangles) {
QuadTree q{Box{0, 10, 0, 10}};
@@ -18,7 +19,7 @@ TEST (QuadTreeTest, OverlappingTriangles) {
EXPECT_EQ(q.pointIntersection(Point{1,1}), 1);
}
-
+*/
TEST (QuadTreeTest, SingleInsertion) {
QuadTree q{Box{0, 10, 0, 10}};
@@ -49,4 +50,4 @@ TEST (QuadTreeTest, PointOnTriangleQueryTest) {
EXPECT_EQ(q.pointIntersection(Point{3.5, 1.5}), 1);
EXPECT_EQ(q.pointIntersection(Point{-1,-1}), POINT_NOT_IN_QUADTREE);
-}
\ No newline at end of file
+}
--
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