Initial commit: Unity WordConnect project

Assets/WordConnectGameToolkit/Scripts/GUI/UILineRenderer.cs

@@ -0,0 +1,111 @@
+// // ©2015 - 2025 Candy Smith
+// // All rights reserved
+// // Redistribution of this software is strictly not allowed.
+// // Copy of this software can be obtained from unity asset store only.
+// // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// // FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE
+// // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// // THE SOFTWARE.
+
+using UnityEngine;
+using UnityEngine.UI;
+
+namespace WordsToolkit.Scripts.GUI
+{
+    [RequireComponent(typeof(CanvasRenderer))]
+    public class UILineRenderer : MaskableGraphic
+    {
+        public Vector2[] _points;
+        public Vector2[] points
+        {
+            get => _points;
+            set
+            {
+                _points = value;
+                SetVerticesDirty(); // Tell Unity to redraw the UI component
+            }
+        }
+
+        public float thickness = 10f;
+        public bool center = true;
+
+        protected override void OnPopulateMesh(VertexHelper vh)
+        {
+            vh.Clear();
+
+            if (_points == null || _points.Length < 2)
+                return;
+            for (int i = 0; i < _points.Length-1; i++)
+            {
+                // Create a line segment between the next two points
+                CreateLineSegment(_points[i], _points[i+1], vh);
+
+                int index = i * 5;
+
+                // Add the line segment to the triangles array
+                vh.AddTriangle(index, index+1, index+3);
+                vh.AddTriangle(index+3, index+2, index);
+
+                // These two triangles create the beveled edges
+                // between line segments using the end point of
+                // the last line segment and the start points of this one
+                if (i != 0)
+                {
+                    vh.AddTriangle(index, index-1, index-3);
+                    vh.AddTriangle(index+1, index-1, index-2);
+                }
+            }
+        }
+
+        /// <summary>
+        /// Creates a rect from two points that acts as a line segment
+        /// </summary>
+        /// <param name="point1">The starting point of the segment</param>
+        /// <param name="point2">The endint point of the segment</param>
+        /// <param name="vh">The vertex helper that the segment is added to</param>
+        private void CreateLineSegment(Vector3 point1, Vector3 point2, VertexHelper vh)
+        {
+            Vector3 offset = center ? (rectTransform.sizeDelta / 2) : Vector2.zero;
+
+            // Create vertex template
+            UIVertex vertex = UIVertex.simpleVert;
+            vertex.color = color;
+
+            // Create the start of the segment
+            Quaternion point1Rotation = Quaternion.Euler(0, 0, RotatePointTowards(point1, point2) + 90);
+            vertex.position = point1Rotation * new Vector3(-thickness / 2, 0);
+            vertex.position += point1 - offset;
+            vh.AddVert(vertex);
+            vertex.position = point1Rotation * new Vector3(thickness / 2, 0);
+            vertex.position += point1 - offset;
+            vh.AddVert(vertex);
+
+            // Create the end of the segment
+            Quaternion point2Rotation = Quaternion.Euler(0, 0, RotatePointTowards(point2, point1) - 90);
+            vertex.position = point2Rotation * new Vector3(-thickness / 2, 0);
+            vertex.position += point2 - offset;
+            vh.AddVert(vertex);
+            vertex.position = point2Rotation * new Vector3(thickness / 2, 0);
+            vertex.position += point2 - offset;
+            vh.AddVert(vertex);
+
+            // Also add the end point
+            vertex.position = point2 - offset;
+            vh.AddVert(vertex);
+        }
+
+        /// <summary>
+        /// Gets the angle that a vertex needs to rotate to face target vertex
+        /// </summary>
+        /// <param name="vertex">The vertex being rotated</param>
+        /// <param name="target">The vertex to rotate towards</param>
+        /// <returns>The angle required to rotate vertex towards target</returns>
+        private float RotatePointTowards(Vector2 vertex, Vector2 target)
+        {
+            return (float)(Mathf.Atan2(target.y - vertex.y, target.x - vertex.x) * (180 / Mathf.PI));
+        }
+    }
+}