From cf00df368264fdf71ce3fae1cd2a987d648499ff Mon Sep 17 00:00:00 2001
From: Michael Hoffer <info@michaelhoffer.de>
Date: Sat, 7 Apr 2018 23:11:13 +0200
Subject: [PATCH] triangulation of polygons possible via public api

---
 build.gradle                                |  6 ++--
 gradle.properties                           |  2 +-
 src/main/java/eu/mihosoft/jcsg/Polygon.java | 32 +++++++++++++++++++++
 3 files changed, 36 insertions(+), 4 deletions(-)

diff --git a/build.gradle b/build.gradle
index 959deb75..883988c3 100644
--- a/build.gradle
+++ b/build.gradle
@@ -2,8 +2,8 @@ plugins {
     id 'application'
     id 'java'
     id 'maven-publish'
-    id 'net.nemerosa.versioning' version '1.5.0'
-    id 'com.jfrog.bintray' version '1.6'
+    id 'net.nemerosa.versioning' version '2.6.1'
+    id 'com.jfrog.bintray' version '1.7.2'
 }
 
 sourceCompatibility = '1.8'
@@ -13,7 +13,7 @@ sourceCompatibility = '1.8'
 //repairHeaders.licenseHeaderText = new File(projectDir,'./license-template.txt')
 
 task wrapper(type: Wrapper, description: 'Creates and deploys the Gradle wrapper to the current directory.') {
-    gradleVersion = '4.0'
+    gradleVersion = '4.6'
 }
 
 if (!hasProperty('mainClass')) {
diff --git a/gradle.properties b/gradle.properties
index d6c234ff..5e990126 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -1,2 +1,2 @@
 group   = eu.mihosoft.vrl.jcsg
-version = 0.5.7-SNAPSHOT
+version = 0.5.7
diff --git a/src/main/java/eu/mihosoft/jcsg/Polygon.java b/src/main/java/eu/mihosoft/jcsg/Polygon.java
index 32a41866..22170b44 100644
--- a/src/main/java/eu/mihosoft/jcsg/Polygon.java
+++ b/src/main/java/eu/mihosoft/jcsg/Polygon.java
@@ -272,6 +272,38 @@ public StringBuilder toStlString(StringBuilder sb) {
         return sb;
     }
 
+    /**
+     * Returns a triangulated version of this polygon.
+     *
+     * @return triangles
+     */
+    public List<Polygon> toTriangles() {
+
+        List<Polygon> result = new ArrayList<>();
+
+        if (this.vertices.size() >= 3) {
+
+            // TODO: improve the triangulation?
+            //
+            // If our polygon has more vertices, create
+            // multiple triangles:
+            Vertex firstVertexStl = this.vertices.get(0);
+            for (int i = 0; i < this.vertices.size() - 2; i++) {
+
+                // create triangle
+                Polygon polygon = Polygon.fromPoints(
+                        firstVertexStl.pos,
+                        this.vertices.get(i + 1).pos,
+                        this.vertices.get(i + 2).pos
+                );
+
+                result.add(polygon);
+            }
+        }
+
+        return result;
+    }
+
     /**
      * Translates this polygon.
      *