void AutoDraw()
{
//read data from data manager
if (pastPainting == null)
{
pastPainting = dataManager.ReadDataFromPath(dataManager.readPath);
if (pastPainting == null)
{
guiTimer = 15;
SwtichMode();
return;
}
}
//draw first point
if (autoDrawData.nowIndex > pastPainting.positionData.Length - 1 || autoDrawData.nowIndex <= 0)
{
Vector3 point = pastPainting.positionData[0];
drawLine.CreateLine(point);
autoDrawData.nowIndex = 1;
autoDrawData.currentPos = pastPainting.positionData[0];
currentPosition = autoDrawData.currentPos;
}
//calculate currentPosition
if (Vector3.Distance(pastPainting.positionData[autoDrawData.nowIndex], currentPosition) <= 0.1f)
{
autoDrawData.nowIndex++;
}
else
{
Vector3 lastPosition = autoDrawData.nowIndex == 0 ? pastPainting.positionData[autoDrawData.nowIndex] : pastPainting.positionData[autoDrawData.nowIndex - 1];
Vector3 nextPosition = pastPainting.positionData[autoDrawData.nowIndex];
Vector3 deltaMoveDirection = (nextPosition - lastPosition).normalized * speed * Time.deltaTime;
currentPosition += deltaMoveDirection;
//check the position won't go too far away
float startToCurrent = Vector3.Distance(lastPosition, currentPosition);
float startToEnd = Vector3.Distance(lastPosition, nextPosition);
while (startToCurrent > startToEnd)
{
autoDrawData.currentPos = currentPosition;
drawLine.UpdateLine(nextPosition);
autoDrawData.nowIndex++;
if (autoDrawData.nowIndex > pastPainting.positionData.Length - 1)
{
return;
}
lastPosition = pastPainting.positionData[autoDrawData.nowIndex - 1];
nextPosition = pastPainting.positionData[autoDrawData.nowIndex];
startToCurrent = Vector3.Distance(lastPosition, currentPosition);
startToEnd = Vector3.Distance(lastPosition, nextPosition);
currentPosition = (nextPosition - lastPosition).normalized * startToCurrent + lastPosition;
}
autoDrawData.currentPos = currentPosition;
drawLine.UpdateLine(autoDrawData.currentPos);
}
}
