/// <summary>
/// Get a matrix which can transform points to 2D
/// </summary>
/// <returns>matrix which can transform points to 2D</returns>
public Matrix4 GetTo2DMatrix()
{
Vector4 xAxis = new Vector4(1, 0 ,0);
//Because Y axis in windows UI is downward, so we should Multiply(-1) here
Vector4 yAxis = new Vector4(0, -1, 0);
Vector4 zAxis = new Vector4(0, 0, 1);
Matrix4 result = new Matrix4(xAxis, yAxis, zAxis);
return result;
}
/// <summary>
/// rotate slab with specific angle
/// </summary>
/// <param name="xAngle">rotate angle in X direction</param>
/// <param name="yAngle">rotate angle in Y direction</param>
public void RotateFloor(double xAngle, double yAngle)
{
if (0 == xAngle && 0 == yAngle) { return; }
m_rotateAngleX += xAngle;
m_rotateAngleY += yAngle;
Matrix4 rotateX = Matrix4.RotateX(m_rotateAngleX);
Matrix4 rotateY = Matrix4.RotateY(m_rotateAngleY);
Matrix4 rotateMatrix = Matrix4.Multiply(rotateX, rotateY);
m_rotateMatrix = Matrix4.Multiply(m_MoveToPictureBoxCenter.Inverse(), rotateMatrix);
m_rotateMatrix = Matrix4.Multiply(m_rotateMatrix, m_MoveToPictureBoxCenter);
}
/// <summary>
/// Calculate geometry info for Slab
/// </summary>
public void GetSlabProfileInfo()
{
// get all the edges of the Slab
m_edges = GetFloorEdges();
// Get a matrix which can transform points to 2D
m_to2DMatrix = GetTo2DMatrix();
// get the boundary of all the points
m_boundPoints = GetBoundsPoints();
// get a matrix which can keep all the points in the center of the canvas
m_moveToCenterMatrix = GetMoveToCenterMatrix();
// get a matrix for scaling all the points and lines within the canvas
m_scaleMatrix = GetScaleMatrix();
// get a matrix for moving all point in the middle of PictureBox
m_MoveToPictureBoxCenter = GetMoveToCenterOfPictureBox();
// transform 3D points to 2D
m_transformMatrix = Get3DTo2DMatrix();
// transform from 2D to 3D
m_restoreMatrix = Get2DTo3DMatrix();
}
/// <summary>
/// make rotate matrix null
/// </summary>
public void ClearRotateMatrix()
{
m_rotateMatrix = null;
}
/// <summary>
/// get a matrix used to rotate object specific angle on Z direction
/// </summary>
/// <param name="angle">rotate angle</param>
/// <returns>matrix which rotate object specific angle on Z direction</returns>
public static Matrix4 RotateZ(double angle)
{
Matrix4 rotateX = new Matrix4();
rotateX.Type = MatrixType.Rotation;
rotateX.Identity();
double sin = (double)Math.Sin(angle);
double cos = (double)Math.Cos(angle);
rotateX.Matrix[1, 1] = cos;
rotateX.Matrix[1, 2] = sin;
rotateX.Matrix[2, 1] = -sin;
rotateX.Matrix[2, 2] = cos;
return rotateX;
}
/// <summary>
/// multiply matrix left and right
/// </summary>
/// <param name="left">left matrix</param>
/// <param name="right">right matrix</param>
/// <returns></returns>
public static Matrix4 Multiply(Matrix4 left, Matrix4 right)
{
Matrix4 result = new Matrix4();
for (int i = 0; i < 4; i++)
{
for (int j = 0; j < 4; j++)
{
result[i, j] = left[i, 0] * right[0, j] + left[i, 1] * right[1, j]
+ left[i, 2] * right[2, j] + left[i, 3] * right[3, j];
}
}
return result;
}
/// <summary>
/// make rotate matrix null
/// </summary>
public void ClearRotateMatrix()
{
m_rotateMatrix = null;
}
