public void DoAIUpdate()
{
Vector2 targetDirection = m_Snake.TargetMoveDirection;
if (m_NotChangeDirectionTimes >= slConstants.SNAKE_RANDMOVEMOENT_WHENNOTCHANGED_TIMES)
{
if (hwmRandom.RandFloat() < slConstants.SNAKE_RANDMOVEMOENT_WHENNOTCHANGED_PROBABILITY)
{
targetDirection = new Vector2(hwmRandom.RandFloat(-1, 1), hwmRandom.RandFloat(-1, 1)).normalized;
}
m_NotChangeDirectionTimes = -1;
}
CalculateSafeArea(ref targetDirection.x, m_Snake.GetHeadPosition().x, m_SafeAreaMinPosition.x, m_SafeAreaMaxPosition.x);
CalculateSafeArea(ref targetDirection.y, m_Snake.GetHeadPosition().y, m_SafeAreaMinPosition.y, m_SafeAreaMaxPosition.y);
#if UNITY_EDITOR
m_AIDetectGizmos.Clear();
#endif
ms_SnakeQuadtreeNodes.Clear();
slWorld.GetInstance().GetSnakeSystem().GetQuadtree().GetRootNode()
.GetAllIntersectNode(ref ms_SnakeQuadtreeNodes
, hwmBox2D.BuildAABB(m_Snake.GetHeadPosition(), new Vector2(slConstants.SNAKE_DETECT_DISTANCE, slConstants.SNAKE_DETECT_DISTANCE)));
bool ignorePredict = IsHitPredict();
int dangerDirection = 0;
if ((!IsSafe(m_ClockwiseDetectAngle * targetDirection, slConstants.SNAKE_DETECT_DISTANCE, ignorePredict) && dangerDirection++ > -1) ||
(!IsSafe(m_CounterclockwiseDetectAngle * targetDirection, slConstants.SNAKE_DETECT_DISTANCE, ignorePredict) && dangerDirection++ > -1) ||
(!IsSafe(targetDirection, slConstants.SNAKE_DETECT_DISTANCE, ignorePredict) && dangerDirection++ > -1))
{
Quaternion angle = dangerDirection == 3
? m_ClockwiseDetectAngle
: dangerDirection == 1
? m_CounterclockwiseDetectAngle
: m_ClockwiseDetectAngle;
Vector2 currentCalculateDirection = targetDirection;
for (int iCalculate = 0; iCalculate < slConstants.SNAKE_AI_CALCULATE_TIMES; iCalculate++)
{
currentCalculateDirection = angle * currentCalculateDirection;
bool isSafe = IsSafe(currentCalculateDirection, slConstants.SNAKE_DETECT_DISTANCE, ignorePredict);
#if UNITY_EDITOR
AIDetectGizmos aIDetectGizmos = new AIDetectGizmos();
aIDetectGizmos.StartPosition = m_Snake.GetHeadPosition();
aIDetectGizmos.EndPosition = (Vector2)m_Snake.GetHeadPosition() + currentCalculateDirection * slConstants.SNAKE_DETECT_DISTANCE;
aIDetectGizmos.IsSafe = isSafe;
m_AIDetectGizmos.Add(aIDetectGizmos);
#endif
if (isSafe)
{
targetDirection = currentCalculateDirection;
break;
}
}
}
m_NotChangeDirectionTimes = m_Snake.TargetMoveDirection == targetDirection.normalized
? m_NotChangeDirectionTimes + 1 : 0;
m_Snake.TargetMoveDirection = targetDirection.normalized;
}
protected void OnDrawGizmos()
{
for (int iAIDetect = 0; iAIDetect < m_AIDetectGizmos.Count; iAIDetect++)
{
AIDetectGizmos iterDetect = m_AIDetectGizmos[iAIDetect];
Gizmos.color = iterDetect.IsSafe ? Color.green : Color.red;
Gizmos.DrawLine(iterDetect.StartPosition, iterDetect.EndPosition);
}
}
