import java.lang.Math.*;
/**
 * A Matrix class for transforming the WireFrameObject
 *
 * @author Nisit Patel
 * @version 0.1, 1 May, 2003
 *
 */
 
class TransformMatrix 
{

    private float theMatrix[][];


    TransformMatrix() 
    {
	this.theMatrix = new float[4][4];
    }

    public void createZRotationMatrix(double rotation)
    {
	theMatrix[0][0] = (float) Math.cos(Math.toRadians(rotation));
	theMatrix[0][1] = (float) -(Math.sin(Math.toRadians(rotation)));
	theMatrix[0][2] = 0;
	theMatrix[0][3] = 0;
	theMatrix[1][0] = (float) Math.sin(Math.toRadians(rotation));
	theMatrix[1][1] = (float) Math.cos(Math.toRadians(rotation));
	theMatrix[1][2] = 0;
	theMatrix[1][3] = 0;
	theMatrix[2][0] = 0;
	theMatrix[2][1] = 0;
	theMatrix[2][2] = 1;
	theMatrix[2][3] = 0;
	theMatrix[3][0] = 0;
	theMatrix[3][1] = 0;
	theMatrix[3][2] = 0;
	theMatrix[3][3] = 1;
    }

    public void createYRotationMatrix(double rotation)
    {
	theMatrix[0][0] = (float) Math.cos(Math.toRadians(rotation));
	theMatrix[0][1] = 0;
	theMatrix[0][2] = (float) Math.sin(Math.toRadians(rotation));
	theMatrix[0][3] = 0;
	theMatrix[1][0] = 0; 
	theMatrix[1][1] = 1; 
	theMatrix[1][2] = 0;
	theMatrix[1][3] = 0;
	theMatrix[2][0] = (float) -(Math.sin(Math.toRadians(rotation)));
	theMatrix[2][1] = 0;
	theMatrix[2][2] = (float) Math.cos(Math.toRadians(rotation));
	theMatrix[2][3] = 0;
	theMatrix[3][0] = 0;
	theMatrix[3][1] = 0;
	theMatrix[3][2] = 0;
	theMatrix[3][3] = 1;
    }

    public void createXRotationMatrix(double rotation)
    {
	theMatrix[0][0] = 1;
	theMatrix[0][1] = 0;
	theMatrix[0][2] = 0;
	theMatrix[0][3] = 0;
	theMatrix[1][0] = 0;
	theMatrix[1][1] = (float) Math.cos(Math.toRadians(rotation));
	theMatrix[1][2] = (float) -(Math.sin(Math.toRadians(rotation)));
	theMatrix[1][3] = 0;
	theMatrix[2][0] = 0;
	theMatrix[2][1] = (float) Math.sin(Math.toRadians(rotation));
	theMatrix[2][2] = (float) Math.cos(Math.toRadians(rotation));
	theMatrix[2][3] = 0;
	theMatrix[3][0] = 0;
	theMatrix[3][1] = 0;
	theMatrix[3][2] = 0;
	theMatrix[3][3] = 1;
    }

    public void createTranslateToOriginMatrix(WireFrame theWireFrame)
    {
	// Takes the first point, and creates a matrix that will move
	// the entire wireframe relative to that point
	WirePointVector newOrigin = ((WireLine) theWireFrame.myLines.get(0)).getStartPoint();

	theMatrix[0][0] = 1;
	theMatrix[0][1] = 0;
	theMatrix[0][2] = 0;
	theMatrix[0][3] = 0 - newOrigin.getX();
	theMatrix[1][0] = 0;
	theMatrix[1][1] = 1;
	theMatrix[1][2] = 0;
	theMatrix[1][3] = 0 - newOrigin.getY();
	theMatrix[2][0] = 0;
	theMatrix[2][1] = 0;
	theMatrix[2][2] = 1;
	theMatrix[2][3] = 0 - newOrigin.getZ();
	theMatrix[3][0] = 0;
	theMatrix[3][1] = 0;
	theMatrix[3][2] = 0;
	theMatrix[3][3] = 1;
    }

    public void createTranslateFromOriginMatrix(WireFrame theWireFrame)
    {
	WirePointVector newOrigin = ((WireLine) theWireFrame.myLines.get(0)).getStartPoint();

	theMatrix[0][0] = 1;
	theMatrix[0][1] = 0;
	theMatrix[0][2] = 0;
	theMatrix[0][3] = newOrigin.getX();
	theMatrix[1][0] = 0;
	theMatrix[1][1] = 1;
	theMatrix[1][2] = 0;
	theMatrix[1][3] = newOrigin.getY();
	theMatrix[2][0] = 0;
	theMatrix[2][1] = 0;
	theMatrix[2][2] = 1;
	theMatrix[2][3] = newOrigin.getZ();
	theMatrix[3][0] = 0;
	theMatrix[3][1] = 0;
	theMatrix[3][2] = 0;
	theMatrix[3][3] = 1;	
    }
	


    public WirePointVector dot(WirePointVector vector)
    {
	return new WirePointVector(
				   ((theMatrix[0][0] * vector.getX()) + 
				    (theMatrix[0][1] * vector.getY()) +
				    (theMatrix[0][2] * vector.getZ()) +
				    (theMatrix[0][3] * vector.getT())),
				   ((theMatrix[1][0] * vector.getX()) + 
				    (theMatrix[1][1] * vector.getY()) +
				    (theMatrix[1][2] * vector.getZ()) +
				    (theMatrix[1][3] * vector.getT())),
				   ((theMatrix[2][0] * vector.getX()) + 
				    (theMatrix[2][1] * vector.getY()) +
				    (theMatrix[2][2] * vector.getZ()) +
				    (theMatrix[2][3] * vector.getT())),
				   ((theMatrix[3][0] * vector.getX()) + 
				    (theMatrix[3][1] * vector.getY()) +
				    (theMatrix[3][2] * vector.getZ()) +
				    (theMatrix[3][3] * vector.getT())));
    }
    
    public WireFrame dotWireFrame(WireFrame theWireFrame)
    {
	WireFrame newFrame = new WireFrame();

	for (int i = 0; i < theWireFrame.numberOfLines(); i++)
	{
	    WireLine tempLine = (WireLine) theWireFrame.myLines.get(i);

	    WirePointVector newStart = this.dot(tempLine.getStartPoint());
	    WirePointVector newEnd   = this.dot(tempLine.getEndPoint());

	    WireLine transformedLine = new WireLine(newStart, newEnd);
	    
	    newFrame.addLine(transformedLine);
	}
	
	return newFrame;
    }



    public WireFrame createSideViewFrame(WireFrame theWireFrame)
    {
	// Rotate 90 degrees in the Y axis
	this.createYRotationMatrix(90);

	// Create the new WireFrame
	WireFrame sideView = this.dotWireFrame(theWireFrame);
	
	// Return the new WireFrame
	return sideView;
    }

    public WireFrame createTopViewFrame(WireFrame theWireFrame)
    {
	// Rotate 90 degrees in the Y axis
	this.createXRotationMatrix(90);

	// Create the new WireFrame
	WireFrame topView = this.dotWireFrame(theWireFrame);
	
	// Return the new WireFrame
	return topView;
    }

    public void printMatrix()
    {
	System.out.println("[" + theMatrix[0][0] + " " + theMatrix[0][1] +
			   " " + theMatrix[0][2] + " " + theMatrix[0][3]);
	System.out.println(" " + theMatrix[1][0] + " " + theMatrix[1][1] +
			   " " + theMatrix[1][2] + " " + theMatrix[1][3]);
	System.out.println(" " + theMatrix[2][0] + " " + theMatrix[2][1] +
			   " " + theMatrix[2][2] + " " + theMatrix[2][3]);
	System.out.println(" " + theMatrix[3][0] + " " + theMatrix[3][1] +
			   " " + theMatrix[3][2] + " " + theMatrix[3][3] + "]");

    }
}