public static bool IsBoundsInCameraEx(this Bounds bounds, Camera camera, float leftex, float rightex, float downex,
float upex)
{
Matrix4x4 matrix = camera.projectionMatrix * camera.worldToCameraMatrix;
int code =
MatrixEx.ComputeOutCodeEx(new Vector4(bounds.center.x + bounds.size.x / 2, bounds.center.y + bounds.size.y / 2,
bounds.center.z + bounds.size.z / 2, 1), matrix, leftex, rightex, downex, upex);
code &=
MatrixEx.ComputeOutCodeEx(new Vector4(bounds.center.x - bounds.size.x / 2, bounds.center.y + bounds.size.y / 2,
bounds.center.z + bounds.size.z / 2, 1), matrix, leftex, rightex, downex, upex);
code &=
MatrixEx.ComputeOutCodeEx(new Vector4(bounds.center.x + bounds.size.x / 2, bounds.center.y - bounds.size.y / 2,
bounds.center.z + bounds.size.z / 2, 1), matrix, leftex, rightex, downex, upex);
code &=
MatrixEx.ComputeOutCodeEx(new Vector4(bounds.center.x - bounds.size.x / 2, bounds.center.y - bounds.size.y / 2,
bounds.center.z + bounds.size.z / 2, 1), matrix, leftex, rightex, downex, upex);
code &=
MatrixEx.ComputeOutCodeEx(new Vector4(bounds.center.x + bounds.size.x / 2, bounds.center.y + bounds.size.y / 2,
bounds.center.z - bounds.size.z / 2, 1), matrix, leftex, rightex, downex, upex);
code &=
MatrixEx.ComputeOutCodeEx(new Vector4(bounds.center.x - bounds.size.x / 2, bounds.center.y + bounds.size.y / 2,
bounds.center.z - bounds.size.z / 2, 1), matrix, leftex, rightex, downex, upex);
code &=
MatrixEx.ComputeOutCodeEx(new Vector4(bounds.center.x + bounds.size.x / 2, bounds.center.y - bounds.size.y / 2,
bounds.center.z - bounds.size.z / 2, 1), matrix, leftex, rightex, downex, upex);
code &=
MatrixEx.ComputeOutCodeEx(new Vector4(bounds.center.x - bounds.size.x / 2, bounds.center.y - bounds.size.y / 2,
bounds.center.z - bounds.size.z / 2, 1), matrix, leftex, rightex, downex, upex);
if (code != 0)
{
return(false);
}
return(true);
}
/// <summary>
/// 判断包围盒是否被相机裁剪
/// </summary>
/// <param name="bounds"></param>
/// <param name="camera"></param>
/// <returns></returns>
public static bool IsBoundsInCamera(this Bounds bounds, Camera camera)
{
Matrix4x4 matrix = camera.projectionMatrix * camera.worldToCameraMatrix;
int code =
MatrixEx.ComputeOutCode(new Vector4(bounds.center.x + bounds.size.x / 2, bounds.center.y + bounds.size.y / 2,
bounds.center.z + bounds.size.z / 2, 1), matrix);
code &=
MatrixEx.ComputeOutCode(new Vector4(bounds.center.x - bounds.size.x / 2, bounds.center.y + bounds.size.y / 2,
bounds.center.z + bounds.size.z / 2, 1), matrix);
code &=
MatrixEx.ComputeOutCode(new Vector4(bounds.center.x + bounds.size.x / 2, bounds.center.y - bounds.size.y / 2,
bounds.center.z + bounds.size.z / 2, 1), matrix);
code &=
MatrixEx.ComputeOutCode(new Vector4(bounds.center.x - bounds.size.x / 2, bounds.center.y - bounds.size.y / 2,
bounds.center.z + bounds.size.z / 2, 1), matrix);
code &=
MatrixEx.ComputeOutCode(new Vector4(bounds.center.x + bounds.size.x / 2, bounds.center.y + bounds.size.y / 2,
bounds.center.z - bounds.size.z / 2, 1), matrix);
code &=
MatrixEx.ComputeOutCode(new Vector4(bounds.center.x - bounds.size.x / 2, bounds.center.y + bounds.size.y / 2,
bounds.center.z - bounds.size.z / 2, 1), matrix);
code &=
MatrixEx.ComputeOutCode(new Vector4(bounds.center.x + bounds.size.x / 2, bounds.center.y - bounds.size.y / 2,
bounds.center.z - bounds.size.z / 2, 1), matrix);
code &=
MatrixEx.ComputeOutCode(new Vector4(bounds.center.x - bounds.size.x / 2, bounds.center.y - bounds.size.y / 2,
bounds.center.z - bounds.size.z / 2, 1), matrix);
if (code != 0)
{
return(false);
}
return(true);
}
protected override int CalculateCullCode(Vector4 position, Matrix4x4 matrix)
{
return(MatrixEx.ComputeOutCodeEx(position, matrix, m_LeftEx, m_RightEx, m_DownEx, m_UpEx));
}
//public override int DetecedCode2D(float centerX, float centerY, float centerZ, float sizeX, float sizeY, float sizeZ)
//{
// if (m_Camera == null)
// return 0;
// Matrix4x4 matrix = m_Camera.cullingMatrix;
// float hsizex = sizeX * 0.5f;
// float hsizey = sizeY * 0.5f;
// float hsizez = sizeZ * 0.5f;
// int code = 0;
// for (int j = 0; j < 2; j++)
// {
// for (int i = 0; i < 2; i++)
// {
// code |= ComputeCellCode(
// new Vector3(centerX + (i - 1) * hsizex, centerY - hsizey, centerZ + (j - 1) * hsizez),
// hsizex, hsizey, hsizez, matrix, 1 << (j * 2 + i));
// }
// }
// return code;
//}
//public override int DetecedCode3D(float centerX, float centerY, float centerZ, float sizeX, float sizeY, float sizeZ)
//{
// return 0;
//}
//private int ComputeCellCode(Vector3 position, float sizex, float sizey, float sizez, Matrix4x4 matrix, int code)
//{
// int c = CalculateCullCode(new Vector4(position.x, position.y, position.z, 1.0f), matrix);
// c &= CalculateCullCode(new Vector4(position.x + sizex, position.y, position.z, 1.0f), matrix);
// c &= CalculateCullCode(new Vector4(position.x, position.y + sizey, position.z, 1.0f), matrix);
// c &= CalculateCullCode(new Vector4(position.x, position.y, position.z + sizez, 1.0f), matrix);
// c &= CalculateCullCode(new Vector4(position.x + sizex, position.y + sizey, position.z, 1.0f), matrix);
// c &= CalculateCullCode(new Vector4(position.x + sizex, position.y, position.z + sizez, 1.0f), matrix);
// c &= CalculateCullCode(new Vector4(position.x, position.y + sizey, position.z + sizez, 1.0f), matrix);
// c &= CalculateCullCode(new Vector4(position.x + sizex, position.y + sizey, position.z + sizez, 1.0f), matrix);
// if (c == 0)
// return code;
// return 0;
//}
protected virtual int CalculateCullCode(Vector4 position, Matrix4x4 matrix)
{
return(MatrixEx.ComputeOutCode(position, matrix));
}