package myGraphics.Kinematics;

import myGraphics.Shape3d.*;
import myGraphics.VectorGrafix.*;
import myGraphics.Perspective.*;
import java.awt.Graphics;

public class StackMachine {
	Transformation3d[] theStack;
	int sp = 0;
	static final int DEFAULT_MAX_STACK = 50;
	int maxStack = DEFAULT_MAX_STACK;
	
	public StackMachine() {
		theStack = new Transformation3d[DEFAULT_MAX_STACK];
		maxStack = DEFAULT_MAX_STACK;
		sp = 0;
		
		theStack[0] = new Transformation3d();	// identity matrix
	}
	
	public StackMachine(int maxHeight) {
		theStack = new Transformation3d[maxHeight];
		maxStack = maxHeight;
		sp = 0;
		
		theStack[0] = new Transformation3d();	// identity matrix
	}
	
	public Transformation3d top() {
		return theStack[sp];
	}
	
	public void translate(double x, double y, double z) {
		Transformation3d T = new Transformation3d();	// identity matrix
		T = T.translate(x, y, z);
		
		theStack[sp] = T.appliedBefore(theStack[sp]);
	}
	
	public void rotate(double ax, double ay, double az) {
		Transformation3d R = new Transformation3d();	// identity matrix
		R = R.x_rotate(ax);
		R = R.y_rotate(ay);
		R = R.z_rotate(az);
		
		theStack[sp] = R.appliedBefore(theStack[sp]);
	}
	
	public void push() {
		theStack[sp + 1] = theStack[sp].copy();
		sp++;
	}
	
	public void pop() {
		sp--;
	}
	
	public void render(Model theModel, Graphics g, Camera c, Viewport v) {
		theModel.trans = (theModel.defaultTrans).appliedBefore(theStack[sp]);
		theModel.displayShape(g, c, v);
	}
	
	public void stop() {
		/* Stop the interpreter.  How do we do that?	*/
		
	}
}