public void AddControlPoint(TFAlphaControlPoint ctrlPoint)
{
alphaControlPoints.Add(ctrlPoint);
}
public void GenerateTexture() // "Texture" of Window Content -> Visualisation of CP and lines etc.
{
List <TFColourControlPoint> cols = new List <TFColourControlPoint>(colourControlPoints);
List <TFAlphaControlPoint> alphas = new List <TFAlphaControlPoint>(alphaControlPoints);
// Sort lists of control points
cols.Sort((a, b) => (a.dataValue.CompareTo(b.dataValue)));
alphas.Sort((a, b) => (a.dataValue.CompareTo(b.dataValue)));
// Add colour points at beginning and end
if (cols.Count == 0 || cols[cols.Count - 1].dataValue < 1.0f)
{
cols.Add(new TFColourControlPoint(1.0f, Color.white));
}
if (cols[0].dataValue > 0.0f)
{
cols.Insert(0, new TFColourControlPoint(0.0f, Color.white));
}
// Add alpha points at beginning and end
if (alphas.Count == 0 || alphas[alphas.Count - 1].dataValue < 1.0f)
{
alphas.Add(new TFAlphaControlPoint(1.0f, 1.0f));
}
if (alphas[0].dataValue > 0.0f)
{
alphas.Insert(0, new TFAlphaControlPoint(0.0f, 0.0f));
}
int numColours = cols.Count;
int numAlphas = alphas.Count;
int iCurrColour = 0;
int iCurrAlpha = 0;
for (int iX = 0; iX < TEXTURE_WIDTH; iX++)
{
float t = iX / (float)(TEXTURE_WIDTH - 1);
while (iCurrColour < numColours - 2 && cols[iCurrColour + 1].dataValue < t)
{
iCurrColour++;
}
while (iCurrAlpha < numAlphas - 2 && alphas[iCurrAlpha + 1].dataValue < t)
{
iCurrAlpha++;
}
TFColourControlPoint leftCol = cols[iCurrColour];
TFColourControlPoint rightCol = cols[iCurrColour + 1];
TFAlphaControlPoint leftAlpha = alphas[iCurrAlpha];
TFAlphaControlPoint rightAlpha = alphas[iCurrAlpha + 1];
float tCol = (Mathf.Clamp(t, leftCol.dataValue, rightCol.dataValue) - leftCol.dataValue) / (rightCol.dataValue - leftCol.dataValue);
float tAlpha = (Mathf.Clamp(t, leftAlpha.dataValue, rightAlpha.dataValue) - leftAlpha.dataValue) / (rightAlpha.dataValue - leftAlpha.dataValue);
Color pixCol = rightCol.colourValue * tCol + leftCol.colourValue * (1.0f - tCol);
pixCol.a = rightAlpha.alphaValue * tAlpha + leftAlpha.alphaValue * (1.0f - tAlpha);
for (int iY = 0; iY < TEXTURE_HEIGHT; iY++)
{
tfCols[iX + iY * TEXTURE_WIDTH] = pixCol;
}
}
texture.wrapMode = TextureWrapMode.Clamp;
texture.SetPixels(tfCols);
texture.Apply();
}
private void OnGUI()
{
volRend = FindObjectOfType <VolumeController>();
if (volRend == null)
{
return;
}
tf = volRend.getTransferFunction();
Color oldColour = GUI.color;
float bgWidth = Mathf.Min(this.position.width - 40.0f, (this.position.height - 50.0f) * 2.0f);
Rect bgRect = new Rect(leftOff, 0.0f, bgWidth, bgWidth * 0.5f);
tf.GenerateTexture();
tfGUIMat.SetTexture("_TFTex", tf.GetTexture());
tfGUIMat.SetTexture("_HistTex", tf.getHistogramTexture());
Graphics.DrawTexture(bgRect, tf.GetTexture(), tfGUIMat);
Texture2D tfTexture = tf.GetTexture();
tfPaletteGUIMat.SetTexture("_TFTex", tf.GetTexture());
Graphics.DrawTexture(new Rect(bgRect.x, bgRect.y + bgRect.height + 20, bgRect.width, 20.0f), tfTexture, tfPaletteGUIMat);
// Colour control points
for (int iCol = 0; iCol < tf.colourControlPoints.Count; iCol++)
{
TFColourControlPoint colPoint = tf.colourControlPoints[iCol];
Rect ctrlBox = new Rect(bgRect.x + bgRect.width * colPoint.dataValue, bgRect.y + bgRect.height + 20, 10, 20);
GUI.color = Color.red;
GUI.skin.box.fontSize = 8;
GUI.Box(ctrlBox, "|");
if (Event.current.type == EventType.MouseDown && Event.current.button == 0 && ctrlBox.Contains(new Vector2(Event.current.mousePosition.x, Event.current.mousePosition.y)))
{
movingColPointIndex = iCol;
selectedColPointIndex = iCol;
}
else if (movingColPointIndex == iCol)
{
colPoint.dataValue = Mathf.Clamp((Event.current.mousePosition.x - bgRect.x) / bgRect.width, 0.0f, 1.0f);
}
tf.colourControlPoints[iCol] = colPoint;
}
// Alpha control points
for (int iAlpha = 0; iAlpha < tf.alphaControlPoints.Count; iAlpha++)
{
TFAlphaControlPoint alphaPoint = tf.alphaControlPoints[iAlpha];
Rect ctrlBox = new Rect(bgRect.x + bgRect.width * alphaPoint.dataValue, bgRect.y + (1.0f - alphaPoint.alphaValue) * bgRect.height, 10, 10);
GUI.color = oldColour;
GUI.skin.box.fontSize = 6;
GUI.Box(ctrlBox, "a");
if (Event.current.type == EventType.MouseDown && Event.current.button == 0 && ctrlBox.Contains(new Vector2(Event.current.mousePosition.x, Event.current.mousePosition.y)))
{
movingAlphaPointIndex = iAlpha;
}
else if (movingAlphaPointIndex == iAlpha)
{
alphaPoint.dataValue = Mathf.Clamp((Event.current.mousePosition.x - bgRect.x) / bgRect.width, 0.0f, 1.0f);
alphaPoint.alphaValue = Mathf.Clamp(1.0f - (Event.current.mousePosition.y - bgRect.y) / bgRect.height, 0.0f, 1.0f);
}
tf.alphaControlPoints[iAlpha] = alphaPoint;
}
if (Event.current.type == EventType.MouseUp)
{
movingColPointIndex = -1;
movingAlphaPointIndex = -1;
}
if (Event.current.type == EventType.MouseDown && Event.current.button == 1)
{
if (bgRect.Contains(new Vector2(Event.current.mousePosition.x, Event.current.mousePosition.y)))
{
tf.alphaControlPoints.Add(new TFAlphaControlPoint(Mathf.Clamp((Event.current.mousePosition.x - bgRect.x) / bgRect.width, 0.0f, 1.0f), Mathf.Clamp(1.0f - (Event.current.mousePosition.y - bgRect.y) / bgRect.height, 0.0f, 1.0f)));
}
else
{
tf.colourControlPoints.Add(new TFColourControlPoint(Mathf.Clamp((Event.current.mousePosition.x - bgRect.x) / bgRect.width, 0.0f, 1.0f), Random.ColorHSV()));
}
selectedColPointIndex = -1;
}
if (selectedColPointIndex != -1)
{
TFColourControlPoint colPoint = tf.colourControlPoints[selectedColPointIndex];
colPoint.colourValue = EditorGUI.ColorField(new Rect(bgRect.x, bgRect.y + bgRect.height + 50, 100.0f, 40.0f), colPoint.colourValue);
tf.colourControlPoints[selectedColPointIndex] = colPoint;
}
updateController();
GUI.color = oldColour;
}