/// <summary>
/// Unity OnPointerDown event handler for the ColorPanelHandler.
/// </summary>
/// <param name="data"></param>
public void OnPointerDown(PointerEventData data)
{
// Get the local position within the color panel
Vector2 localPosition = getLocalPositionFromScreenPosition(data.position, data.pressEventCamera);
// Check if there is a control point at the localPosition, and return it if there is one
transferFunction.ActiveControlPoint = getClickedPoint(localPosition);
// Deselect any highlighted points and close the color palette
transferFunctionHandler.dehighlightPoints();
transferFunctionHandler.closeColorPalette();
// Left click
if (Input.GetMouseButton(0))
{
if (transferFunction.ActiveControlPoint == null)
{
// If no point is clicked, generate a new point to be added to the transfer function
ControlPoint newActivePoint = getColorPointFromOffset(localPosition, transferFunctionHandler.getColorPalette().getCurrentColor());
transferFunction.addColorPoint(newActivePoint);
controlPointRenderers.Add(new ControlPointRenderer(newActivePoint, createControlPointImage(newActivePoint)));
transferFunction.ActiveControlPoint = newActivePoint;
}
// Open the color palette
transferFunctionHandler.openColorPalette();
transferFunctionHandler.getColorPalette().setCurrentColor(transferFunction.ActiveControlPoint.color);
transferFunctionHandler.getColorPalette().setSliders();
}
// Right click
else if (Input.GetMouseButton(1))
{
if (transferFunction.ActiveControlPoint != null)
{
if (transferFunction.ColorPoints.Count > 2)
{
// Delete the active point that was clicked
transferFunction.removeColorPoint(transferFunction.ActiveControlPoint);
// Delete its associated renderer
for (int i = 0; i < controlPointRenderers.Count; i++)
{
if (controlPointRenderers[i].CP.Equals(transferFunction.ActiveControlPoint))
{
controlPointRenderers[i].destruct();
controlPointRenderers.Remove(controlPointRenderers[i]);
}
}
}
}
}
}
