/// <summary>
/// 判断包围盒是否在摄像机范围内(扩展)
/// </summary>
/// <param name="iBounds">包围盒</param>
/// <param name="iCamera">摄像机</param>
/// <param name="iLeftX">左偏移(基于-1)</param>
/// <param name="iRightX">右偏移(基于1)</param>
/// <param name="iDownY">下偏移(基于-1)</param>
/// <param name="iUpY">上偏移(基于1)</param>
/// <returns>包围盒是否在摄像机范围内</returns>
public static bool IsInCamera(
this Bounds iBounds, Camera iCamera,
float iLeftX, float iRightX, float iDownY, float iUpY)
{
// 裁剪矩阵
var matrix = iCamera.projectionMatrix * iCamera.worldToCameraMatrix;
var code =
MatrixEx.ComputeOutCodeEx(new Vector4(iBounds.center.x + iBounds.size.x / 2, iBounds.center.y + iBounds.size.y / 2,
iBounds.center.z + iBounds.size.z / 2, 1), matrix, iLeftX, iRightX, iDownY, iUpY);
code &=
MatrixEx.ComputeOutCodeEx(new Vector4(iBounds.center.x - iBounds.size.x / 2, iBounds.center.y + iBounds.size.y / 2,
iBounds.center.z + iBounds.size.z / 2, 1), matrix, iLeftX, iRightX, iDownY, iUpY);
code &=
MatrixEx.ComputeOutCodeEx(new Vector4(iBounds.center.x + iBounds.size.x / 2, iBounds.center.y - iBounds.size.y / 2,
iBounds.center.z + iBounds.size.z / 2, 1), matrix, iLeftX, iRightX, iDownY, iUpY);
code &=
MatrixEx.ComputeOutCodeEx(new Vector4(iBounds.center.x - iBounds.size.x / 2, iBounds.center.y - iBounds.size.y / 2,
iBounds.center.z + iBounds.size.z / 2, 1), matrix, iLeftX, iRightX, iDownY, iUpY);
code &=
MatrixEx.ComputeOutCodeEx(new Vector4(iBounds.center.x + iBounds.size.x / 2, iBounds.center.y + iBounds.size.y / 2,
iBounds.center.z - iBounds.size.z / 2, 1), matrix, iLeftX, iRightX, iDownY, iUpY);
code &=
MatrixEx.ComputeOutCodeEx(new Vector4(iBounds.center.x - iBounds.size.x / 2, iBounds.center.y + iBounds.size.y / 2,
iBounds.center.z - iBounds.size.z / 2, 1), matrix, iLeftX, iRightX, iDownY, iUpY);
code &=
MatrixEx.ComputeOutCodeEx(new Vector4(iBounds.center.x + iBounds.size.x / 2, iBounds.center.y - iBounds.size.y / 2,
iBounds.center.z - iBounds.size.z / 2, 1), matrix, iLeftX, iRightX, iDownY, iUpY);
code &=
MatrixEx.ComputeOutCodeEx(new Vector4(iBounds.center.x - iBounds.size.x / 2, iBounds.center.y - iBounds.size.y / 2,
iBounds.center.z - iBounds.size.z / 2, 1), matrix, iLeftX, iRightX, iDownY, iUpY);
return(code == 0);
}
/// <summary>
/// 判断包围盒是否在摄像机范围内
/// </summary>
/// <param name="iBounds">包围盒</param>
/// <param name="iCamera">摄像机</param>
/// <returns>包围盒是否在摄像机范围内</returns>
public static bool IsInCamera(this Bounds iBounds, Camera iCamera)
{
var matrix = iCamera.projectionMatrix * iCamera.worldToCameraMatrix;
var code =
MatrixEx.ComputeOutCode(new Vector4(iBounds.center.x + iBounds.size.x / 2, iBounds.center.y + iBounds.size.y / 2,
iBounds.center.z + iBounds.size.z / 2, 1), matrix);
code &=
MatrixEx.ComputeOutCode(new Vector4(iBounds.center.x - iBounds.size.x / 2, iBounds.center.y + iBounds.size.y / 2,
iBounds.center.z + iBounds.size.z / 2, 1), matrix);
code &=
MatrixEx.ComputeOutCode(new Vector4(iBounds.center.x + iBounds.size.x / 2, iBounds.center.y - iBounds.size.y / 2,
iBounds.center.z + iBounds.size.z / 2, 1), matrix);
code &=
MatrixEx.ComputeOutCode(new Vector4(iBounds.center.x - iBounds.size.x / 2, iBounds.center.y - iBounds.size.y / 2,
iBounds.center.z + iBounds.size.z / 2, 1), matrix);
code &=
MatrixEx.ComputeOutCode(new Vector4(iBounds.center.x + iBounds.size.x / 2, iBounds.center.y + iBounds.size.y / 2,
iBounds.center.z - iBounds.size.z / 2, 1), matrix);
code &=
MatrixEx.ComputeOutCode(new Vector4(iBounds.center.x - iBounds.size.x / 2, iBounds.center.y + iBounds.size.y / 2,
iBounds.center.z - iBounds.size.z / 2, 1), matrix);
code &=
MatrixEx.ComputeOutCode(new Vector4(iBounds.center.x + iBounds.size.x / 2, iBounds.center.y - iBounds.size.y / 2,
iBounds.center.z - iBounds.size.z / 2, 1), matrix);
code &=
MatrixEx.ComputeOutCode(new Vector4(iBounds.center.x - iBounds.size.x / 2, iBounds.center.y - iBounds.size.y / 2,
iBounds.center.z - iBounds.size.z / 2, 1), matrix);
return(code == 0);
}
