new file mode 100644
--- /dev/null
+++ b/pmc/Makefile
@@ -0,0 +1,28 @@
+#!/bin/bash
+
+CC=g++
+LD=ld
+CFLAGS=-Wall -O2 -ansi 
+LDFLAGS=-lSDL
+INCLUDE=include
+CONFIG=-DSTEP=2
+OBJECTS=pmc.o cube.o main.o
+
+.SUFFIXES: .cc
+
+.cc.o: 
+	$(CC) -c $(CFLAGS) -I$(INCLUDE) $(CONFIG) $<
+
+all: pmc 
+
+
+pmc: $(OBJECTS)
+	$(CC) $(CFLAGS) $(LDFLAGS) $(OBJECTS) -o $@
+
+.PHONY: clean
+
+clean:
+	rm -f *.[oae];
+	rm -f *~;
+	rm -f pmc glcube
+

new file mode 100644
--- /dev/null
+++ b/pmc/cube.cc
@@ -0,0 +1,94 @@
+/***
+ *
+ * $Id: cube.cc,v 1.1.1.1 2008-04-28 17:33:22 mbroeker Exp $
+ * $Source: /development/cpp/pmc/cube.cc,v $
+ *
+ */
+
+#include <cube.h>
+#include "../sdl.cc"
+
+extern SDL_Surface *screen;
+extern unsigned long color;
+
+Cube::Cube (Vector p1, Vector p2, Vector p3, Vector p4, int h)
+{
+    P[0] = new Vector (p1);
+    P[1] = new Vector (p2);
+    P[2] = new Vector (p3);
+    P[3] = new Vector (p4);
+
+    P[4] = new Vector (p1.X (), p1.Y (), p1.Z () + h);
+    P[5] = new Vector (p2.X (), p2.Y (), p2.Z () + h);
+    P[6] = new Vector (p3.X (), p3.Y (), p3.Z () + h);
+    P[7] = new Vector (p4.X (), p4.Y (), p4.Z () + h);
+
+    height = h;
+}
+
+Cube::~Cube ()
+{
+    for (int i = 0; i < 8; i++)
+        delete P[i];
+}
+
+void Cube::move (Vector location)
+{
+    for (int i = 0; i < 8; i++) {
+        P[i] = new Vector (*P[i] + location);
+    }
+}
+
+void Cube::show ()
+{
+    P[0]->vector ();
+    std::cout << ", ";
+    P[1]->vector ();
+    std::cout << std::endl;
+    P[2]->vector ();
+    std::cout << ", ";
+    P[3]->vector ();
+    std::cout << std::endl;
+
+    P[4]->vector ();
+    std::cout << ", ";
+    P[5]->vector ();
+    std::cout << std::endl;
+    P[6]->vector ();
+    std::cout << ", ";
+    P[7]->vector ();
+    std::cout << std::endl;
+
+    drawLine (screen, P[0]->X (), P[0]->Y (), P[1]->X (), P[1]->Y (), color);
+    drawLine (screen, P[2]->X (), P[2]->Y (), P[3]->X (), P[3]->Y (), color);
+    drawLine (screen, P[0]->X (), P[0]->Y (), P[2]->X (), P[2]->Y (), color);
+    drawLine (screen, P[1]->X (), P[1]->Y (), P[3]->X (), P[3]->Y (), color);
+
+    drawLine (screen, (int)(height / 2.0) + P[4]->X (),
+              (int)(height / 2.0) + P[4]->Y (),
+              (int)(height / 2.0) + P[5]->X (), (int)(height / 2.0) + P[5]->Y (), color);
+
+    drawLine (screen, (int)(height / 2.0) + P[6]->X (),
+              (int)(height / 2.0) + P[6]->Y (),
+              (int)(height / 2.0) + P[7]->X (), (int)(height / 2.0) + P[7]->Y (), color);
+
+    drawLine (screen, (int)(height / 2.0) + P[4]->X (),
+              (int)(height / 2.0) + P[4]->Y (),
+              (int)(height / 2.0) + P[6]->X (), (int)(height / 2.0) + P[6]->Y (), color);
+
+    drawLine (screen, (int)(height / 2.0) + P[5]->X (),
+              (int)(height / 2.0) + P[5]->Y (),
+              (int)(height / 2.0) + P[7]->X (), (int)(height / 2.0) + P[7]->Y (), color);
+
+    drawLine (screen, P[0]->X (), P[0]->Y (),
+              (int)(height / 2.0) + P[4]->X (), (int)(height / 2.0) + P[4]->Y (), color);
+
+    drawLine (screen, P[2]->X (), P[2]->Y (),
+              (int)(height / 2.0) + P[6]->X (), (int)(height / 2.0) + P[6]->Y (), color);
+
+    drawLine (screen, P[1]->X (), P[1]->Y (),
+              (int)(height / 2.0) + P[5]->X (), (int)(height / 2.0) + P[5]->Y (), color);
+
+    drawLine (screen, P[3]->X (), P[3]->Y (),
+              (int)(height / 2.0) + P[7]->X (), (int)(height / 2.0) + P[7]->Y (), color);
+}

new file mode 100644
--- /dev/null
+++ b/pmc/include/cube.h
@@ -0,0 +1,25 @@
+/***
+ *
+ * $Id: cube.h,v 1.1.1.1 2008-04-28 17:33:22 mbroeker Exp $
+ * $Source: /development/cpp/pmc/include/cube.h,v $
+ */
+
+#ifndef _CUBE_H
+#define _CUBE_H
+
+#include <pmc.h>
+
+using namespace pmc;
+
+class Cube:public Vector {
+  public:
+    Vector * P[8];
+    int height;
+
+      Cube (Vector p1, Vector p2, Vector p3, Vector p4, int h);
+      virtual ~ Cube ();
+    void show ();
+    void move (Vector);
+};
+
+#endif

new file mode 100644
--- /dev/null
+++ b/pmc/include/object.h
@@ -0,0 +1,22 @@
+/***
+ *
+ * $Id: object.h,v 1.1.1.1 2008-04-28 17:33:22 mbroeker Exp $
+ * $Source: /development/cpp/pmc/include/object.h,v $
+ */
+
+#ifndef OBJECT_H
+#define OBJECT_H
+
+#include <string>
+#include <iostream>
+
+class Object {
+  protected:
+    std::string name;
+
+  public:
+    virtual ~ Object () {
+		std::cout << "Freeing Object " << name << std::endl;
+    }
+};
+#endif

new file mode 100644
--- /dev/null
+++ b/pmc/include/pmc.h
@@ -0,0 +1,43 @@
+/***
+ *
+ * $Id: pmc.h,v 1.1.1.1 2008-04-28 17:33:22 mbroeker Exp $
+ * $Source: /development/cpp/pmc/include/pmc.h,v $
+ */
+
+#ifndef PMC_H
+#define PMC_H
+
+#include <iostream>
+#include <object.h>
+
+namespace pmc {
+    class Vector:public Object {
+      private:
+        int x;
+        int y;
+        int z;
+
+      public:
+        enum Mode { DEG, RAD, GRAD };
+
+          Vector (int xx = 0, int yy = 0, int zz = 0);
+          virtual ~ Vector ();
+
+        int X ();
+        int Y ();
+        int Z ();
+
+        Vector operator+ (Vector);
+        Vector operator- (Vector);
+        int operator* (Vector);
+        double abs ();
+
+        void vector ();
+        double angle (Vector);
+        void setMode (Mode m = RAD);
+
+      private:
+          Mode mode;
+    };
+}
+#endif

new file mode 100644
--- /dev/null
+++ b/pmc/main.cc
@@ -0,0 +1,107 @@
+/***
+ *
+ * $Id: main.cc,v 1.1.1.1 2008-04-28 17:33:22 mbroeker Exp $
+ * $Source: /development/cpp/pmc/main.cc,v $
+ *
+ */
+
+#include <cube.h>
+#include <SDL/SDL.h>
+
+unsigned long color;
+SDL_Surface *screen;
+
+#ifndef STEP
+#define STEP 1
+#endif
+
+int main (int argc, char **argv)
+{
+
+    unsigned long red, black;
+    SDL_Event event;
+
+    if (argc != 2) {
+        std::cout << "USAGE: " << argv[0]
+            << " height" << std::endl;
+        exit (0);
+    }
+    int h = atoi (argv[1]);
+
+    if ((h < 10) || (h >= 360))
+        h = 200;
+
+    Vector p1 (0, 0, 0);
+    Vector p2 (0, h, 0);
+    Vector p3 (h, 0, 0);
+    Vector p4 (h, h, 0);
+
+    SDL_Init (SDL_INIT_VIDEO);
+    screen = SDL_SetVideoMode (1010, 700, 16, SDL_HWSURFACE);
+    red = SDL_MapRGB (screen->format, 0xff, 0x00, 0x00);
+    black = SDL_MapRGB (screen->format, 0x00, 0x00, 0x00);
+
+    Cube *c = new Cube (p1, p2, p3, p4, h);
+    Cube *d = new Cube (p1, p2, p3, p4, h);
+
+    c->move (Vector (100, 250, 0));
+    d->move (Vector (400, 250, 0));
+
+    bool running = true;
+    int x, y, z;
+
+    x = y = z = 0;
+
+    while (running) {
+        SDL_PollEvent (&event);
+
+        if (event.type == SDL_QUIT)
+            running = false;
+
+        if (event.type == SDL_KEYDOWN) {
+            color = black;
+            c->show ();
+            d->show ();
+            color = red;
+
+            switch (event.key.keysym.sym) {
+            case SDLK_ESCAPE:
+                running = false;
+                break;
+
+            case SDLK_UP:
+                c->move ((Vector (x, y - STEP, z)));
+                d->move ((Vector (x, y - STEP, z)));
+                break;
+
+            case SDLK_DOWN:
+                c->move ((Vector (x, y + STEP, z)));
+                d->move ((Vector (x, y + STEP, z)));
+                break;
+
+            case SDLK_LEFT:
+                c->move ((Vector (x - STEP, y, z)));
+                d->move ((Vector (x - STEP, y, z)));
+                break;
+
+            case SDLK_RIGHT:
+                c->move ((Vector (x + STEP, y, z)));
+                d->move ((Vector (x + STEP, y, z)));
+                break;
+            default:
+                break;
+            }
+
+            c->show ();
+            d->show ();
+            SDL_Flip (screen);
+        }
+    }
+
+    delete c;
+    delete d;
+
+    SDL_Quit ();
+
+    return 0;
+}

new file mode 100644
--- /dev/null
+++ b/pmc/pmc.cc
@@ -0,0 +1,78 @@
+/***
+ *
+ * $Id: pmc.cc,v 1.1.1.1 2008-04-28 17:33:22 mbroeker Exp $
+ * $Source: /development/cpp/pmc/pmc.cc,v $
+ *
+ */
+
+#include <iostream>
+#include <cmath>
+#include <pmc.h>
+
+using namespace pmc;
+
+Vector::Vector (int xx, int yy, int zz)
+{
+    name = "Vector";
+    x = xx;
+    y = yy;
+    z = zz;
+    mode = RAD;
+}
+
+Vector::~Vector ()
+{
+}
+
+int Vector::X ()
+{
+    return x;
+}
+
+int Vector::Y ()
+{
+    return y;
+}
+
+int Vector::Z ()
+{
+    return z;
+}
+
+Vector Vector::operator+ (Vector a)
+{
+    return Vector (x + a.X (), y + a.Y (), z + a.Z ());
+}
+
+Vector Vector::operator- (Vector a)
+{
+    return Vector (x - a.X (), y - a.Y (), z - a.Z ());
+}
+
+int Vector::operator* (Vector a)
+{
+    return (x * a.X () + y * a.Y () + z * a.Z ());
+}
+
+double Vector::abs ()
+{
+    return (std::sqrt (x * x + y * y + z * z));
+}
+
+void Vector::vector ()
+{
+    std::cout << "(" << x << ", " << y << ", " << z << ")";
+}
+
+double Vector::angle (Vector p)
+{
+    if (mode == DEG)
+        return ((180.0 / M_PI) * std::acos ((p ** this) / (abs () * p.abs ())));
+
+    return (std::acos ((p ** this) / (abs () * p.abs ())));
+}
+
+void Vector::setMode (Mode m)
+{
+    mode = m;
+}

new file mode 100644
--- /dev/null
+++ b/pmc/sdl.cc
@@ -0,0 +1,76 @@
+/***
+ *
+ * $Id: sdl.cc,v 1.1.1.1 2008-04-28 17:33:22 mbroeker Exp $
+ * $Source: /development/cpp/pmc/sdl.cc,v $
+ *
+ */
+
+#include <SDL/SDL.h>
+
+#define max(a,b) (((a) > (b)) ? (a) : (b))
+#define min(a,b) (((a) < (b)) ? (a) : (b))
+#define abs(a) (((a)<0) ? -(a) : (a))
+#define sign(a) (((a)<0) ? -1 : (a)>0 ? 1 : 0)
+
+void drawLine (SDL_Surface * s, int x1, int y1, int x2, int y2, Uint32 color)
+{
+    int d;
+    int x;
+    int y;
+    int ax;
+    int ay;
+    int sx;
+    int sy;
+    int dx;
+    int dy;
+
+    Uint8 *lineAddr;
+    Sint32 yOffset;
+
+    dx = x2 - x1;
+    ax = abs (dx) << 1;
+    sx = sign (dx);
+
+    dy = y2 - y1;
+    ay = abs (dy) << 1;
+    sy = sign (dy);
+    yOffset = sy * s->pitch;
+
+    x = x1;
+    y = y1;
+
+    lineAddr = ((Uint8 *) s->pixels) + (y * s->pitch);
+    if (ax > ay) {              /* x dominant */
+        d = ay - (ax >> 1);
+        for (;;) {
+            *((Uint16 *) (lineAddr + (x << 1))) = (Uint16) color;
+
+            if (x == x2) {
+                return;
+            }
+            if (d >= 0) {
+                y += sy;
+                lineAddr += yOffset;
+                d -= ax;
+            }
+            x += sx;
+            d += ay;
+        }
+    } else {                    /* y dominant */
+        d = ax - (ay >> 1);
+        for (;;) {
+            *((Uint16 *) (lineAddr + (x << 1))) = (Uint16) color;
+
+            if (y == y2) {
+                return;
+            }
+            if (d >= 0) {
+                x += sx;
+                d -= ay;
+            }
+            y += sy;
+            lineAddr += yOffset;
+            d += ax;
+        }
+    }
+}

--- a/xdemo.c
+++ b/xdemo.c
@@ -21,7 +21,7 @@
     }
 
     XSynchronize (dpy, 1);
-    w = XCreateSimpleWindow (dpy, DefaultRootWindow (dpy), 0, 0, 640, 480, 1, 1, 1);
+    w = XCreateSimpleWindow (dpy, DefaultRootWindow (dpy), 0, 0, 240, 60, 1, 1, 1);
 
     if (w < 0)
         return EXIT_SUCCESS;
@@ -31,7 +31,7 @@
     XRaiseWindow (dpy, w);
     XMapWindow (dpy, w);
 
-    printf ("Press any key to quit\n");
+    printf ("Press ESC to quit\n");
 
     active = 1;
     XSelectInput (dpy, w, KeyPressMask);
@@ -40,7 +40,9 @@
         XNextEvent (dpy, &xev);
         switch (xev.type) {
         case KeyPress:
-            active = 0;
+			if(xev.xkey.keycode == 9)
+	            active = 0;
+			printf("Keycode = %2u\n", xev.xkey.keycode);
             break;
         default:
             printf ("Unknown Event: %d\n", xev.type);