public virtual void DoEffect(TMProLinkAnimator context, int start, int length)
{
CurrentContext = context;
CurrentStart = start;
CurrentLength = length;
MeshVertUpdateLoop(context, start, length, TransFunc, ColorFunc, mode);
}
/// <summary>
/// Same as calcing a character mid but averaging over all characters in the given character range
/// </summary>
/// <param name="context"></param>
/// <param name="start"></param>
/// <param name="end"></param>
/// <returns></returns>
static public Vector2 CalcMidFromChars(TMProLinkAnimator context, int start, int end)
{
Vector3 middle = Vector3.zero;
var chInfo = context.TMProComponent.textInfo.characterInfo;
for (int i = start; i < end; i++)
{
int materialIndex = chInfo[i].materialReferenceIndex;
int vertexIndex = chInfo[i].vertexIndex;
Vector3[] sourceVertices = context.CachedMeshInfo[materialIndex].vertices;
middle += (sourceVertices[vertexIndex + 0] + sourceVertices[vertexIndex + 2]) / 2;
}
return(middle / (end - start));
}
/// <summary>
/// Helper for mesh vertex updating within a found link, adapted from TMPRo examples VertexJitter.
/// </summary>
/// <param name="context"></param>
/// <param name="start"></param>
/// <param name="length"></param>
/// <param name="transformFunc"></param>
/// <param name="colorFunc"></param>
/// <param name="mode"></param>
static public void MeshVertUpdateLoop(TMProLinkAnimator context, int start, int length, System.Func <int, Matrix4x4> transformFunc, System.Func <int, Color32, Color32> colorFunc, TMPLinkAnimatorMode mode)
{
var tmproComponent = context.TMProComponent;
var textInfo = tmproComponent.textInfo;
var end = start + length;
var cachedMeshInfo = context.CachedMeshInfo;
Matrix4x4 matrix = Matrix4x4.identity;
Vector2 middle = Vector2.zero;
Color32 col = Color.white;
int wordIndex = -1;
int lineIndex = -1;
for (int i = start; i < end; i++)
{
//required as TMPro is putting non visible invalid elements in the charinfo array assuming I will follow this rule
// if we don't character 0 ends up getting an effect applied to it even though it shouldn't
if (!textInfo.characterInfo[i].isVisible)
{
continue;
}
// Get the index of the material used by the current character.
int materialIndex = textInfo.characterInfo[i].materialReferenceIndex;
// Get the index of the first vertex used by this text element.
int vertexIndex = textInfo.characterInfo[i].vertexIndex;
// Get the cached vertices of the mesh used by this text element (character or sprite).
Vector3[] sourceVertices = cachedMeshInfo[materialIndex].vertices;
Color32[] vertexColors = cachedMeshInfo[materialIndex].colors32;
if (i == start && mode == TMPLinkAnimatorMode.PerSection)
{
matrix = transformFunc(start);
middle = CalcMidFromChars(context, start, end);
col = colorFunc(start, vertexColors[vertexIndex]);
}
// Determine the center point of each character at the baseline.
//Vector2 charMidBasline = new Vector2((sourceVertices[vertexIndex + 0].x + sourceVertices[vertexIndex + 2].x) / 2, charInfo.baseLine);
// Determine the center point of each character.
if (mode == TMPLinkAnimatorMode.PerCharacter)
{
middle = (sourceVertices[vertexIndex + 0] + sourceVertices[vertexIndex + 2]) / 2;
matrix = transformFunc(i);
col = colorFunc(i, vertexColors[vertexIndex]);
}
else if (mode == TMPLinkAnimatorMode.PerWord)
{
var newWordIndex = CalcWordFromChar(i, textInfo.wordInfo);
if (newWordIndex != -1 && wordIndex != newWordIndex)
{
wordIndex = newWordIndex;
middle = CalcMidFromChars(context, Mathf.Max(start, textInfo.wordInfo[wordIndex].firstCharacterIndex), Mathf.Min(end, textInfo.wordInfo[wordIndex].lastCharacterIndex));
matrix = transformFunc(i);
col = colorFunc(i, vertexColors[vertexIndex]);
}
}
else if (mode == TMPLinkAnimatorMode.PerLine)
{
var newLineIndex = textInfo.characterInfo[i].lineNumber;
if (newLineIndex != -1 && lineIndex != newLineIndex)
{
lineIndex = newLineIndex;
middle = CalcMidFromChars(context, Mathf.Max(start, textInfo.lineInfo[lineIndex].firstCharacterIndex), Mathf.Min(end, textInfo.lineInfo[lineIndex].lastCharacterIndex));
matrix = transformFunc(i);
col = colorFunc(i, vertexColors[vertexIndex]);
}
}
// Need to translate all 4 vertices of each quad to aligned with middle of character / baseline.
// This is needed so the matrix TRS is applied at the origin for each character.
Vector3 offset = middle;
Vector3[] destinationVertices = textInfo.meshInfo[materialIndex].vertices;
Color32[] destinationVertColors = textInfo.meshInfo[materialIndex].colors32;
destinationVertices[vertexIndex + 0] = sourceVertices[vertexIndex + 0] - offset;
destinationVertices[vertexIndex + 1] = sourceVertices[vertexIndex + 1] - offset;
destinationVertices[vertexIndex + 2] = sourceVertices[vertexIndex + 2] - offset;
destinationVertices[vertexIndex + 3] = sourceVertices[vertexIndex + 3] - offset;
destinationVertices[vertexIndex + 0] = matrix.MultiplyPoint3x4(destinationVertices[vertexIndex + 0]);
destinationVertices[vertexIndex + 1] = matrix.MultiplyPoint3x4(destinationVertices[vertexIndex + 1]);
destinationVertices[vertexIndex + 2] = matrix.MultiplyPoint3x4(destinationVertices[vertexIndex + 2]);
destinationVertices[vertexIndex + 3] = matrix.MultiplyPoint3x4(destinationVertices[vertexIndex + 3]);
destinationVertices[vertexIndex + 0] += offset;
destinationVertices[vertexIndex + 1] += offset;
destinationVertices[vertexIndex + 2] += offset;
destinationVertices[vertexIndex + 3] += offset;
destinationVertColors[vertexIndex + 0] = col;
destinationVertColors[vertexIndex + 1] = col;
destinationVertColors[vertexIndex + 2] = col;
destinationVertColors[vertexIndex + 3] = col;
}
}
