public static TransferFunction2D CreateTransferFunction2D()
{
TransferFunction2D tf2D = new TransferFunction2D();
tf2D.AddBox(0.05f, 0.1f, 0.8f, 0.7f, Color.white, 0.4f);
return(tf2D);
}
private void OnGUI()
{
// Update selected object
if (volRendObject == null)
{
volRendObject = SelectionHelper.GetSelectedVolumeObject();
}
if (volRendObject == null)
{
return;
}
if (hist2DTex == null)
{
hist2DTex = HistogramTextureGenerator.Generate2DHistogramTexture(volRendObject.dataset);
}
TransferFunction2D tf2d = volRendObject.transferFunction2D;
// Calculate GUI width (minimum of window width and window height * 2)
float bgWidth = Mathf.Min(this.position.width - 20.0f, (this.position.height - 250.0f) * 2.0f);
// Draw the histogram
Rect histRect = new Rect(0.0f, 0.0f, bgWidth, bgWidth * 0.5f);
Graphics.DrawTexture(histRect, hist2DTex);
// Draw the TF texture (showing the rectangles)
tfGUIMat.SetTexture("_TFTex", tf2d.GetTexture());
Graphics.DrawTexture(histRect, tf2d.GetTexture(), tfGUIMat);
// Handle mouse click in box
for (int iBox = 0; iBox < tf2d.boxes.Count; iBox++)
{
TransferFunction2D.TF2DBox box = tf2d.boxes[iBox];
Rect boxRect = new Rect(histRect.x + box.rect.x * histRect.width, histRect.y + (1.0f - box.rect.height - box.rect.y) * histRect.height, box.rect.width * histRect.width, box.rect.height * histRect.height);
if (Event.current.type == EventType.MouseDown && Event.current.button == 0 && boxRect.Contains(new Vector2(Event.current.mousePosition.x, Event.current.mousePosition.y)))
{
selectedBoxIndex = iBox;
}
}
float startX = histRect.x;
float startY = histRect.y + histRect.height + 10;
// Show GUI for editing selected rectangle
if (selectedBoxIndex != -1)
{
EditorGUI.BeginChangeCheck();
TransferFunction2D.TF2DBox box = tf2d.boxes[selectedBoxIndex];
float oldX = box.rect.x;
float oldY = box.rect.y;
box.rect.x = EditorGUI.Slider(new Rect(startX, startY, 200.0f, 20.0f), "x", box.rect.x, 0.0f, 0.99f);
box.rect.width = EditorGUI.Slider(new Rect(startX + 220.0f, startY, 200.0f, 20.0f), "width", oldX + box.rect.width, box.rect.x + 0.01f, 1.0f) - box.rect.x;
box.rect.y = EditorGUI.Slider(new Rect(startX, startY + 50, 200.0f, 20.0f), "y", box.rect.y, 0.0f, 1.0f);
box.rect.height = EditorGUI.Slider(new Rect(startX + 220.0f, startY + 50, 200.0f, 20.0f), "height", oldY + box.rect.height, box.rect.y + 0.01f, 1.0f) - box.rect.y;
box.colour = EditorGUI.ColorField(new Rect(startX + 450.0f, startY + 10, 100.0f, 20.0f), box.colour);
box.minAlpha = EditorGUI.Slider(new Rect(startX + 450.0f, startY + 30, 200.0f, 20.0f), "min alpha", box.minAlpha, 0.0f, 1.0f);
box.alpha = EditorGUI.Slider(new Rect(startX + 450.0f, startY + 60, 200.0f, 20.0f), "max alpha", box.alpha, 0.0f, 1.0f);
tf2d.boxes[selectedBoxIndex] = box;
needsRegenTexture |= EditorGUI.EndChangeCheck();
}
else
{
EditorGUI.LabelField(new Rect(startX, startY, this.position.width - startX, 50.0f), "Select a rectangle in the above view, or add a new one.");
}
// Add new rectangle
if (GUI.Button(new Rect(startX, startY + 100, 110.0f, 30.0f), "Add rectangle"))
{
tf2d.AddBox(0.1f, 0.1f, 0.8f, 0.8f, Color.white, 0.5f);
needsRegenTexture = true;
}
// Remove selected shape
if (selectedBoxIndex != -1)
{
if (GUI.Button(new Rect(startX, startY + 140, 110.0f, 30.0f), "Remove selected shape"))
{
tf2d.boxes.RemoveAt(selectedBoxIndex);
needsRegenTexture = true;
}
}
if (GUI.Button(new Rect(startX, startY + 180, 110.0f, 30.0f), "Save"))
{
string filepath = EditorUtility.SaveFilePanel("Save transfer function", "", "default.tf2d", "tf2d");
if (filepath != "")
{
TransferFunctionDatabase.SaveTransferFunction2D(tf2d, filepath);
}
}
if (GUI.Button(new Rect(startX, startY + 220, 110.0f, 30.0f), "Load"))
{
string filepath = EditorUtility.OpenFilePanel("Save transfer function", "", "tf2d");
if (filepath != "")
{
TransferFunction2D newTF = TransferFunctionDatabase.LoadTransferFunction2D(filepath);
if (newTF != null)
{
volRendObject.transferFunction2D = tf2d = newTF;
needsRegenTexture = true;
}
}
}
// TODO: regenerate on add/remove/modify (and do it async)
if (needsRegenTexture)
{
tf2d.GenerateTexture();
needsRegenTexture = false;
}
volRendObject.SetTransferFunctionMode(TFRenderMode.TF2D);
return;
}