private void ApplyTextAlignmentToTRSMatrix(ref Matrix4x4 matrix, TextPivot pivot, Bounds textBounds)
{
var textHalfHeight = textBounds.extents.y;
var textHalfWidth = textBounds.extents.x;
if (pivot == TextPivot.BottomLeft)
{
TranslateMatrixInXY(ref matrix, textHalfWidth, textHalfHeight);
}
else if (pivot == TextPivot.BottomCenter)
{
TranslateMatrixInYAxis(ref matrix, textHalfHeight);
}
else if (pivot == TextPivot.BottomRight)
{
TranslateMatrixInXY(ref matrix, -textHalfWidth, textHalfHeight);
}
else if (pivot == TextPivot.CenterLeft)
{
TranslateMatrixInXAxis(ref matrix, textHalfWidth);
}
else if (pivot == TextPivot.CenterRight)
{
TranslateMatrixInXAxis(ref matrix, -textHalfWidth);
}
else if (pivot == TextPivot.TopLeft)
{
TranslateMatrixInXY(ref matrix, textHalfWidth, -textHalfHeight);
}
else if (pivot == TextPivot.TopCenter)
{
TranslateMatrixInYAxis(ref matrix, -textHalfHeight);
}
else if (pivot == TextPivot.TopRight)
{
TranslateMatrixInXY(ref matrix, -textHalfWidth, -textHalfHeight);
}
}
public static void DrawText(string text, float fontSize, Color color, Matrix4x4 mat, TMP_FontAsset font, TextPivot pivot = TextPivot.Center)
{
Instance.DrawTextInternal(text, fontSize, color, mat, font, pivot);
}
private void DrawTextInternal(string text, float fontSize, Color color, Matrix4x4 mat, TMP_FontAsset font = null, TextPivot pivot = TextPivot.Center)
{
if (_materialPropertyBlockLastColorSet != color)
{
_materialPropertyBlockLastColorSet = color;
_materialPropertyBlock.SetColor(_materialTextColorPropertyId, color);
}
if (font == null)
{
font = _defaultFontAsset;
}
//Since TMP generates meshes that, by default, face the -z direction, we need to rotate it by 180 degrees in the y axis
RotateMatrix180DegreesInYAxis(ref mat);
var textMesh = GenerateMeshForText(text, fontSize, font);
ApplyTextAlignmentToTRSMatrix(ref mat, pivot, textMesh.bounds);
Graphics.DrawMesh(textMesh, mat, font.material, 0, null, 0, _materialPropertyBlock);
}
