add open hyperlinks script for opening and highlighting hyperlinks, added hyperlinks to about page

2025-12-15 02:11:07 -06:00 · 2020-05-20 16:36:09 -05:00
parent 81e5ab8081
commit abad559eef
4 changed files with 305 additions and 91 deletions
--- a/Boids/Assets/OpenHyperlinks.cs
+++ b/Boids/Assets/OpenHyperlinks.cs
@@ -0,0 +1,107 @@
+using System;
+using System.Collections;
+using System.Collections.Generic;
+using System.Linq;
+using UnityEngine;
+using UnityEngine.EventSystems;
+using TMPro;
+
+// somewhat based upon the TextMesh Pro example script: TMP_TextSelector_B
+[RequireComponent(typeof(TextMeshProUGUI))]
+public class OpenHyperlinks : MonoBehaviour, IPointerClickHandler {
+    public bool doesColorChangeOnHover = true;
+    public Color hoverColor = new Color(60f / 255f, 120f / 255f, 1f);
+
+    private TextMeshProUGUI _pTextMeshPro;
+    private Canvas _pCanvas;
+    private Camera _pCamera;
+
+    public bool IsLinkHighlighted => _pCurrentLink != -1;
+
+    private int _pCurrentLink = -1;
+    private List<Color32[]> _pOriginalVertexColors = new List<Color32[]>();
+
+    protected virtual void Awake() {
+        _pTextMeshPro = GetComponent<TextMeshProUGUI>();
+        _pCanvas = GetComponentInParent<Canvas>();
+
+        // Get a reference to the camera if Canvas Render Mode is not ScreenSpace Overlay.
+        if (_pCanvas.renderMode == RenderMode.ScreenSpaceOverlay)
+            _pCamera = null;
+        else
+            _pCamera = _pCanvas.worldCamera;
+    }
+
+    void LateUpdate() {
+        // is the cursor in the correct region (above the text area) and furthermore, in the link region?
+        var isHoveringOver =
+            TMP_TextUtilities.IsIntersectingRectTransform(_pTextMeshPro.rectTransform, Input.mousePosition, _pCamera);
+        int linkIndex = isHoveringOver
+            ? TMP_TextUtilities.FindIntersectingLink(_pTextMeshPro, Input.mousePosition, _pCamera)
+            : -1;
+
+        // Clear previous link selection if one existed.
+        if (_pCurrentLink != -1 && linkIndex != _pCurrentLink) {
+            // Debug.Log("Clear old selection");
+            SetLinkToColor(_pCurrentLink, (linkIdx, vertIdx) => _pOriginalVertexColors[linkIdx][vertIdx]);
+            _pOriginalVertexColors.Clear();
+            _pCurrentLink = -1;
+        }
+
+        // Handle new link selection.
+        if (linkIndex != -1 && linkIndex != _pCurrentLink) {
+            // Debug.Log("New selection");
+            _pCurrentLink = linkIndex;
+            if (doesColorChangeOnHover)
+                _pOriginalVertexColors = SetLinkToColor(linkIndex, (_linkIdx, _vertIdx) => hoverColor);
+        }
+
+        // Debug.Log(string.Format("isHovering: {0}, link: {1}", isHoveringOver, linkIndex));
+    }
+
+    public void OnPointerClick(PointerEventData eventData) {
+        // Debug.Log("Click at POS: " + eventData.position + "  World POS: " + eventData.worldPosition);
+
+        int linkIndex = TMP_TextUtilities.FindIntersectingLink(_pTextMeshPro, Input.mousePosition, _pCamera);
+        if (linkIndex != -1) {
+            // was a link clicked?
+            TMP_LinkInfo linkInfo = _pTextMeshPro.textInfo.linkInfo[linkIndex];
+
+            // Debug.Log(string.Format("id: {0}, text: {1}", linkInfo.GetLinkID(), linkInfo.GetLinkText()));
+            // open the link id as a url, which is the metadata we added in the text field
+            Application.OpenURL(linkInfo.GetLinkID());
+        }
+    }
+
+    List<Color32[]> SetLinkToColor(int linkIndex, Func<int, int, Color32> colorForLinkAndVert) {
+        TMP_LinkInfo linkInfo = _pTextMeshPro.textInfo.linkInfo[linkIndex];
+
+        var oldVertColors = new List<Color32[]>(); // store the old character colors
+
+        for (int i = 0; i < linkInfo.linkTextLength; i++) {
+            // for each character in the link string
+            int characterIndex = linkInfo.linkTextfirstCharacterIndex + i; // the character index into the entire text
+            TMP_CharacterInfo charInfo = _pTextMeshPro.textInfo.characterInfo[characterIndex];
+            int meshIndex =
+                charInfo
+                    .materialReferenceIndex; // Get the index of the material / sub text object used by this character.
+            int vertexIndex = charInfo.vertexIndex; // Get the index of the first vertex of this character.
+
+            Color32[] vertexColors =
+                _pTextMeshPro.textInfo.meshInfo[meshIndex].colors32; // the colors for this character
+            oldVertColors.Add(vertexColors.ToArray());
+
+            if (charInfo.isVisible) {
+                vertexColors[vertexIndex + 0] = colorForLinkAndVert(i, vertexIndex + 0);
+                vertexColors[vertexIndex + 1] = colorForLinkAndVert(i, vertexIndex + 1);
+                vertexColors[vertexIndex + 2] = colorForLinkAndVert(i, vertexIndex + 2);
+                vertexColors[vertexIndex + 3] = colorForLinkAndVert(i, vertexIndex + 3);
+            }
+        }
+
+        // Update Geometry
+        _pTextMeshPro.UpdateVertexData(TMP_VertexDataUpdateFlags.All);
+
+        return oldVertColors;
+    }
+}
--- a/Boids/Assets/OpenHyperlinks.cs.meta
+++ b/Boids/Assets/OpenHyperlinks.cs.meta
@@ -0,0 +1,11 @@
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--- a/Boids/Assets/Resources/Fonts/EncodeSans-Bold
+++ b/Boids/Assets/Resources/Fonts/EncodeSans-Bold
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--- a/Boids/Assets/Scenes/Project.unity
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@@ -1666,16 +1588,18 @@ MonoBehaviour:

    - <link="https://github.com/Xevion/Boids">Project Source</link>

-    - <link>My GitHub Profile</link>
+    - <link="https://github.com/Xevion">My GitHub Profile</link>


    <b>Thanks to</b>

-    <link>Sebastian Lague</link> for the inspiration.
+    <link="https://www.youtube.com/channel/UCmtyQOKKmrMVaKuRXz02jbQ">Sebastian Lague</link>
+    for the inspiration.

-    <link>Conrad Parker</link> for the detailed pseudocode.
+    <link="http://www.kfish.org/boids/pseudocode.html">Conrad Parker</link> for the
+    detailed pseudocode.

-    <link>Craig Reynold</link> for the Boids algorithm.'
+    <link="https://www.red3d.com/cwr/boids/">Craig Reynold</link> for the Boids algorithm.'
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