private void FindNearGridOnDirection(LevelGrid grid, NearGridDirection dir)
{
int layerMask = 1 << 9 | 1 << 10;
RaycastHit hit;
Vector3 raycastPos = grid.position + 0.5f * grid.direction;
Quaternion rotation = Quaternion.FromToRotation(Vector3.up, grid.direction);
Vector3 direction = Vector3.back;
switch (dir)
{
case NearGridDirection.BACK:
{
direction = Vector3.back;
break;
}
case NearGridDirection.FORWARD:
{
direction = Vector3.forward;
break;
}
case NearGridDirection.LEFT:
{
direction = Vector3.left;
break;
}
case NearGridDirection.RIGHT:
{
direction = Vector3.right;
break;
}
}
if (Physics.Raycast(raycastPos, rotation * direction, out hit, 1f, layerMask))
{
GridSplitter cube = hit.collider.GetComponent <GridSplitter>();
grid.SetNearGrid(cube.GetGridAtPosition(hit.point), dir);
//grid.setDebugInfo(raycastPos, hit.point, dir);
}
else if (Physics.Raycast(raycastPos, grid.position + rotation * direction - raycastPos, out hit, 2f, layerMask))
{
GridSplitter cube = hit.collider.GetComponent <GridSplitter>();
grid.SetNearGrid(cube.GetGridAtPosition(hit.point), dir);
//grid.setDebugInfo(raycastPos, hit.point, dir);
}
else if (Physics.Raycast(raycastPos - grid.direction + rotation * direction, rotation * ((-1) * direction), out hit, 1f, layerMask))
{
GridSplitter cube = hit.collider.GetComponent <GridSplitter>();
grid.SetNearGrid(cube.GetGridAtPosition(hit.point), dir);
//grid.setDebugInfo(raycastPos - grid.direction + rotation * direction, hit.point, dir);
}
}
protected void LightDetect()
{
//TODO:光照检测，确定每个LevelGrid的luminance
Quaternion lightDir = GameObject.Find("Directional Light").GetComponent <Transform>().rotation;
Vector3 direction = lightDir * Vector3.back;
foreach (LevelGrid grid in levelGrids)
{
//判断是否光线是否被遮挡
int layerMask = 1 << 9;
RaycastHit hit;
Vector3 raycastPos = grid.position;
Quaternion rotation = Quaternion.FromToRotation(Vector3.up, grid.direction);
//中心点和四个顶点向光源做raycast
if (Physics.Raycast(raycastPos, direction, out hit, 100f, layerMask))
{
grid.luminance = 0;
}
else if (Physics.Raycast(raycastPos + 0.4f * (rotation * Vector3.back + rotation * Vector3.left), direction, out hit, 100f, layerMask))
{
grid.luminance = 0;
}
else if (Physics.Raycast(raycastPos + 0.4f * (rotation * Vector3.back + rotation * Vector3.right), direction, out hit, 100f, layerMask))
{
grid.luminance = 0;
}
else if (Physics.Raycast(raycastPos + 0.4f * (rotation * Vector3.forward + rotation * Vector3.left), direction, out hit, 100f, layerMask))
{
grid.luminance = 0;
}
else if (Physics.Raycast(raycastPos + 0.4f * (rotation * Vector3.forward + rotation * Vector3.right), direction, out hit, 100f, layerMask))
{
grid.luminance = 0;
}
//检测面在同一个平面上不视为遮挡
if (grid.luminance == 0)
{
GridSplitter cube = hit.collider.GetComponent <GridSplitter>();
LevelGrid tmpGrid = cube.GetGridAtPosition(hit.point);
if (tmpGrid != null)
{
if (tmpGrid.direction == grid.direction && Vector3.Dot(hit.point, grid.direction) == Vector3.Dot(raycastPos, grid.direction))
{
grid.luminance = 1;
}
}
}
//点积法线和光照方向计算光照强度
if (grid.luminance == 1)
{
double intensity = (Vector3.Dot(grid.direction, (lightDir * Vector3.back)) * 0.5f) + 0.5f;
// Debug.Log(intensity);
if (intensity > 0.5)
{
grid.luminance = 2;
}
}
}
}