diff --git a/20231123/alignment-01.c b/20231123/alignment-01.c
new file mode 100644
index 0000000000000000000000000000000000000000..3bfffa4a1ee9ec9f7a3e494f0baa2e3890d4dba7
--- /dev/null
+++ b/20231123/alignment-01.c
@@ -0,0 +1,13 @@
+#include <stdio.h>
+#include <stdint.h>
+#include <string.h>
+
+int main (void)
+{
+ uint8_t a;
+ uint16_t b;
+ uint8_t c;
+ memset (&a, 0xff, 4);
+ printf ("a = %d\nb = %d\nc = %d\n", a, b, c);
+ return 0;
+}
diff --git a/20231123/alignment-02.c b/20231123/alignment-02.c
new file mode 100644
index 0000000000000000000000000000000000000000..84ff0b508a9e5addf3f0d4bc829f335f137019b3
--- /dev/null
+++ b/20231123/alignment-02.c
@@ -0,0 +1,14 @@
+#include <stdio.h>
+#include <stdint.h>
+#include <string.h>
+
+uint8_t a;
+uint16_t b;
+uint8_t c;
+
+int main (void)
+{
+ memset (&a, 0xff, 4);
+ printf ("a = %d\nb = %d\nc = %d\n", a, b, c);
+ return 0;
+}
diff --git a/20231123/alignment-03.c b/20231123/alignment-03.c
new file mode 100644
index 0000000000000000000000000000000000000000..62091dfe3ccaa414972bca5a013087459229240a
--- /dev/null
+++ b/20231123/alignment-03.c
@@ -0,0 +1,14 @@
+#include <stdio.h>
+#include <stdint.h>
+#include <string.h>
+
+uint8_t a;
+uint16_t b;
+uint8_t c;
+
+int main (void)
+{
+ memset (&a, 0xff, 8);
+ printf ("a = %d\nb = %d\nc = %d\n", a, b, c);
+ return 0;
+}
diff --git a/20231123/alignment-04.c b/20231123/alignment-04.c
new file mode 100644
index 0000000000000000000000000000000000000000..f91792d9579e36c4b0625d9d457c67709e47c373
--- /dev/null
+++ b/20231123/alignment-04.c
@@ -0,0 +1,14 @@
+#include <stdio.h>
+#include <stdint.h>
+#include <string.h>
+
+uint8_t a;
+uint16_t b;
+uint8_t c;
+
+int main (void)
+{
+ memset (&a, 0xff, 5);
+ printf ("a = %d\nb = %d\nc = %d\n", a, b, c);
+ return 0;
+}
diff --git a/20231123/alignment-05.c b/20231123/alignment-05.c
new file mode 100644
index 0000000000000000000000000000000000000000..6f1a971266e2db36304807342b3169be1763de46
--- /dev/null
+++ b/20231123/alignment-05.c
@@ -0,0 +1,14 @@
+#include <stdio.h>
+#include <stdint.h>
+#include <string.h>
+
+uint8_t a;
+uint64_t b;
+uint8_t c;
+
+int main (void)
+{
+ memset (&a, 0xff, 5);
+ printf ("a = %d\nb = %d\nc = %d\n", a, b, c);
+ return 0;
+}
diff --git a/20231123/alignment-06.c b/20231123/alignment-06.c
new file mode 100644
index 0000000000000000000000000000000000000000..6b05bb13002524847e4fcdf2219e8553a5a3f6f1
--- /dev/null
+++ b/20231123/alignment-06.c
@@ -0,0 +1,14 @@
+#include <stdio.h>
+#include <stdint.h>
+#include <string.h>
+
+uint8_t a;
+uint64_t b;
+uint8_t c;
+
+int main (void)
+{
+ memset (&a, 0xff, 9);
+ printf ("a = %d\nb = %d\nc = %d\n", a, b, c);
+ return 0;
+}
diff --git a/20231123/deriv-01.c b/20231123/deriv-01.c
new file mode 100644
index 0000000000000000000000000000000000000000..610980cfd1f266cf5af90ec9a9f5e21ff4b618fc
--- /dev/null
+++ b/20231123/deriv-01.c
@@ -0,0 +1,25 @@
+#include <stdio.h>
+
+float f (float x)
+{
+ return x * x;
+}
+
+float df_a (float x)
+{
+ return 2.0 * x;
+}
+
+float df_n (float x)
+{
+ float dx = 0.0000001;
+ float df = f (x + 0.5 * dx) - f (x - 0.5 * dx);
+ return df / dx;
+}
+
+int main (void)
+{
+ for (float x = -3.0; x <= 3.0; x += 0.1)
+ printf ("%10f%10f%10f%10f\n", x, f (x), df_a (x), df_n (x));
+ return 0;
+}
diff --git a/20231123/deriv-01.dat b/20231123/deriv-01.dat
new file mode 100644
index 0000000000000000000000000000000000000000..94d46f9c5ff8f8c73d005c48ef3323b95aa10de6
--- /dev/null
+++ b/20231123/deriv-01.dat
@@ -0,0 +1,61 @@
+ -3.000000 9.000000 -6.000000 0.000000
+ -2.900000 8.410001 -5.800000 0.000000
+ -2.800000 7.840001 -5.600000 0.000000
+ -2.700000 7.290001 -5.400001 0.000000
+ -2.600000 6.760002 -5.200001 0.000000
+ -2.500000 6.250002 -5.000001 0.000000
+ -2.400001 5.760003 -4.800001 0.000000
+ -2.300001 5.290003 -4.600001 0.000000
+ -2.200001 4.840003 -4.400002 0.000000
+ -2.100001 4.410004 -4.200002 0.000000
+ -2.000001 4.000004 -4.000002 0.000000
+ -1.900001 3.610003 -3.800002 0.000000
+ -1.800001 3.240003 -3.600002 0.000000
+ -1.700001 2.890003 -3.400002 0.000000
+ -1.600001 2.560003 -3.200002 0.000000
+ -1.500001 2.250003 -3.000002 0.000000
+ -1.400001 1.960002 -2.800002 0.000000
+ -1.300001 1.690002 -2.600002 0.000000
+ -1.200001 1.440002 -2.400002 0.000000
+ -1.100001 1.210002 -2.200001 0.000000
+ -1.000001 1.000001 -2.000001 0.000000
+ -0.900001 0.810001 -1.800001 -2.384186
+ -0.800001 0.640001 -1.600001 -1.788139
+ -0.700001 0.490001 -1.400001 -1.788139
+ -0.600001 0.360001 -1.200001 -1.490116
+ -0.500001 0.250001 -1.000001 -1.192093
+ -0.400001 0.160000 -0.800001 -1.043081
+ -0.300001 0.090000 -0.600001 -0.670552
+ -0.200001 0.040000 -0.400001 -0.372529
+ -0.100001 0.010000 -0.200001 -0.204891
+ -0.000001 0.000000 -0.000001 -0.000001
+ 0.099999 0.010000 0.199999 0.214204
+ 0.199999 0.040000 0.399999 0.372529
+ 0.299999 0.090000 0.599999 0.745058
+ 0.399999 0.160000 0.799999 0.894070
+ 0.499999 0.249999 0.999999 1.192093
+ 0.599999 0.359999 1.199999 1.192093
+ 0.699999 0.489999 1.399999 1.788139
+ 0.799999 0.639999 1.599999 1.788139
+ 0.899999 0.809999 1.799999 2.384186
+ 0.999999 0.999999 1.999999 2.384186
+ 1.099999 1.209999 2.199999 0.000000
+ 1.199999 1.439999 2.399999 0.000000
+ 1.299999 1.689999 2.599999 0.000000
+ 1.399999 1.959999 2.799999 0.000000
+ 1.500000 2.249999 2.999999 0.000000
+ 1.600000 2.559999 3.199999 0.000000
+ 1.700000 2.889998 3.399999 0.000000
+ 1.800000 3.239999 3.599999 0.000000
+ 1.900000 3.609998 3.799999 0.000000
+ 2.000000 3.999999 3.999999 0.000000
+ 2.100000 4.409998 4.199999 0.000000
+ 2.200000 4.839998 4.399999 0.000000
+ 2.299999 5.289998 4.599999 0.000000
+ 2.399999 5.759997 4.799999 0.000000
+ 2.499999 6.249997 4.999999 0.000000
+ 2.599999 6.759996 5.199998 0.000000
+ 2.699999 7.289995 5.399998 0.000000
+ 2.799999 7.839994 5.599998 0.000000
+ 2.899999 8.409993 5.799998 0.000000
+ 2.999999 8.999993 5.999998 0.000000
diff --git a/20231123/deriv-01.gp b/20231123/deriv-01.gp
new file mode 100644
index 0000000000000000000000000000000000000000..109ff331eedf01e1556ad8421d7362fa1733e83b
--- /dev/null
+++ b/20231123/deriv-01.gp
@@ -0,0 +1,4 @@
+plot "deriv-01.dat" using 1:2 with lines title "f(x)", \
+ "deriv-01.dat" using 1:3 with lines title "df_a(x)", \
+ "deriv-01.dat" using 1:4 with lines lc "red" dashtype "-" title "df_n(x)"
+pause -1
diff --git a/20231123/deriv-02.c b/20231123/deriv-02.c
new file mode 100644
index 0000000000000000000000000000000000000000..14235c90aaab4454daba87e9cd75e19dd123edf5
--- /dev/null
+++ b/20231123/deriv-02.c
@@ -0,0 +1,25 @@
+#include <stdio.h>
+
+float f (float x)
+{
+ return x * x * x;
+}
+
+float df_a (float x)
+{
+ return 3.0 * x * x;
+}
+
+float df_n (float x)
+{
+ float dx = 0.1;
+ float df = f (x + 0.5 * dx) - f (x - 0.5 * dx);
+ return df / dx;
+}
+
+int main (void)
+{
+ for (float x = -3.0; x <= 3.0; x += 0.1)
+ printf ("%11f %11f %11f %11f\n", x, f (x), df_a (x), df_n (x));
+ return 0;
+}
diff --git a/20231123/deriv-02.dat b/20231123/deriv-02.dat
new file mode 100644
index 0000000000000000000000000000000000000000..49f62404e668974e2c4cba85c593ff8fad978e85
--- /dev/null
+++ b/20231123/deriv-02.dat
@@ -0,0 +1,61 @@
+ -3.000000 -27.000000 27.000000 27.002468
+ -2.900000 -24.389004 25.230001 25.232487
+ -2.800000 -21.952005 23.520002 23.522472
+ -2.700000 -19.683006 21.870005 21.872482
+ -2.600000 -17.576008 20.280006 20.282497
+ -2.500000 -15.625009 18.750008 18.752489
+ -2.400001 -13.824010 17.280008 17.282486
+ -2.300001 -12.167011 15.870009 15.872488
+ -2.200001 -10.648011 14.520010 14.522505
+ -2.100001 -9.261011 13.230011 13.232498
+ -2.000001 -8.000011 12.000011 12.002497
+ -1.900001 -6.859010 10.830010 10.832500
+ -1.800001 -5.832009 9.720010 9.722505
+ -1.700001 -4.913008 8.670009 8.672500
+ -1.600001 -4.096007 7.680008 7.682502
+ -1.500001 -3.375006 6.750008 6.752501
+ -1.400001 -2.744005 5.880007 5.882499
+ -1.300001 -2.197004 5.070006 5.072502
+ -1.200001 -1.728003 4.320005 4.322501
+ -1.100001 -1.331003 3.630005 3.632501
+ -1.000001 -1.000002 3.000004 3.002503
+ -0.900001 -0.729002 2.430004 2.432504
+ -0.800001 -0.512001 1.920003 1.922504
+ -0.700001 -0.343001 1.470003 1.472503
+ -0.600001 -0.216001 1.080002 1.082503
+ -0.500001 -0.125000 0.750002 0.752502
+ -0.400001 -0.064000 0.480001 0.482502
+ -0.300001 -0.027000 0.270001 0.272501
+ -0.200001 -0.008000 0.120001 0.122501
+ -0.100001 -0.001000 0.030000 0.032500
+ -0.000001 -0.000000 0.000000 0.002500
+ 0.099999 0.001000 0.030000 0.032500
+ 0.199999 0.008000 0.119999 0.122499
+ 0.299999 0.027000 0.269999 0.272499
+ 0.399999 0.064000 0.479998 0.482499
+ 0.499999 0.125000 0.749998 0.752498
+ 0.599999 0.215999 1.079998 1.082498
+ 0.699999 0.342999 1.469997 1.472498
+ 0.799999 0.511999 1.919997 1.922498
+ 0.899999 0.728999 2.429997 2.432498
+ 0.999999 0.999998 2.999997 3.002497
+ 1.099999 1.330998 3.629996 3.632492
+ 1.199999 1.727998 4.319996 4.322493
+ 1.299999 2.196997 5.069996 5.072492
+ 1.399999 2.743997 5.879996 5.882490
+ 1.500000 3.374997 6.749996 6.752491
+ 1.600000 4.095996 7.679996 7.682493
+ 1.700000 4.912996 8.669995 8.672490
+ 1.800000 5.831996 9.719995 9.722486
+ 1.900000 6.858996 10.829996 10.832486
+ 2.000000 7.999996 11.999996 12.002501
+ 2.100000 9.260995 13.229996 13.232479
+ 2.200000 10.647994 14.519995 14.522486
+ 2.299999 12.166991 15.869993 15.872469
+ 2.399999 13.823989 17.279991 17.282476
+ 2.499999 15.624988 18.749989 18.752470
+ 2.599999 17.575983 20.279987 20.282459
+ 2.699999 19.682980 21.869986 21.872482
+ 2.799999 21.951977 23.519983 23.522453
+ 2.899999 24.388971 25.229980 25.232468
+ 2.999999 26.999969 26.999979 27.002430
diff --git a/20231123/deriv-02.gp b/20231123/deriv-02.gp
new file mode 100644
index 0000000000000000000000000000000000000000..a0a097aa09cc8db86a8ffeba3c54205403b56c8a
--- /dev/null
+++ b/20231123/deriv-02.gp
@@ -0,0 +1,4 @@
+plot "deriv-02.dat" using 1:2 with lines title "f(x)", \
+ "deriv-02.dat" using 1:3 with lines title "df_a(x)", \
+ "deriv-02.dat" using 1:4 with lines lc "red" dashtype "-" title "df_n(x)"
+pause -1
diff --git a/20231123/wurf-01.c b/20231123/wurf-01.c
new file mode 100644
index 0000000000000000000000000000000000000000..85ee32ef9d7614f812032cb4d121a5082b137969
--- /dev/null
+++ b/20231123/wurf-01.c
@@ -0,0 +1,43 @@
+#include <gtk/gtk.h>
+
+double x = 137;
+double y = 255;
+
+static void draw (GtkDrawingArea *drawing_area, cairo_t *c,
+ int width, int height, gpointer user_data)
+{
+ GdkRGBA blue = { 0.0, 0.5, 1.0, 1.0 };
+
+ gdk_cairo_set_source_rgba (c, &blue);
+ cairo_arc (c, x, y, 10, 0, 2 * G_PI);
+ cairo_fill (c);
+}
+
+static void activate (GtkApplication *app, gpointer user_data)
+{
+ GtkWidget *window = gtk_application_window_new (app);
+ gtk_window_set_title (GTK_WINDOW (window), "Hello");
+
+ GtkWidget *vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 5);
+ gtk_window_set_child (GTK_WINDOW (window), vbox);
+
+ GtkWidget *drawing_area = gtk_drawing_area_new ();
+ gtk_widget_set_size_request (drawing_area, 1024, 768);
+ gtk_drawing_area_set_draw_func (GTK_DRAWING_AREA (drawing_area), draw, NULL, NULL);
+ gtk_box_append (GTK_BOX (vbox), drawing_area);
+
+ GtkWidget *quit_button = gtk_button_new_with_label ("Quit");
+ g_signal_connect_swapped (quit_button, "clicked", G_CALLBACK (gtk_window_destroy), window);
+ gtk_box_append (GTK_BOX (vbox), quit_button);
+
+ gtk_window_present (GTK_WINDOW (window));
+}
+
+int main (int argc, char **argv)
+{
+ GtkApplication *app = gtk_application_new ("de.hs-bochum.cvh.hp.hello-gtk", G_APPLICATION_DEFAULT_FLAGS);
+ g_signal_connect (app, "activate", G_CALLBACK (activate), NULL);
+ int status = g_application_run (G_APPLICATION (app), argc, argv);
+ g_object_unref (app);
+ return status;
+}
diff --git a/20231123/wurf-02.c b/20231123/wurf-02.c
new file mode 100644
index 0000000000000000000000000000000000000000..c4978ecb3a1663a393e465a6566b4b5505461e5e
--- /dev/null
+++ b/20231123/wurf-02.c
@@ -0,0 +1,57 @@
+#include <gtk/gtk.h>
+
+#define WIDTH 1024
+#define HEIGHT 768
+
+double x = 137;
+double y = 255;
+
+static void draw (GtkDrawingArea *drawing_area, cairo_t *c,
+ int width, int height, gpointer user_data)
+{
+ GdkRGBA blue = { 0.0, 0.5, 1.0, 1.0 };
+
+ gdk_cairo_set_source_rgba (c, &blue);
+ cairo_arc (c, x, y, 10, 0, 2 * G_PI);
+ cairo_fill (c);
+}
+
+gboolean timer (GtkWidget *widget)
+{
+ x += 3;
+ y += 2;
+ gtk_widget_queue_draw (widget);
+ g_timeout_add (50, (GSourceFunc) timer, widget);
+ return FALSE;
+}
+
+static void activate (GtkApplication *app, gpointer user_data)
+{
+ GtkWidget *window = gtk_application_window_new (app);
+ gtk_window_set_title (GTK_WINDOW (window), "Hello");
+
+ GtkWidget *vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 5);
+ gtk_window_set_child (GTK_WINDOW (window), vbox);
+
+ GtkWidget *drawing_area = gtk_drawing_area_new ();
+ gtk_widget_set_size_request (drawing_area, WIDTH, HEIGHT);
+ gtk_drawing_area_set_draw_func (GTK_DRAWING_AREA (drawing_area), draw, NULL, NULL);
+ gtk_box_append (GTK_BOX (vbox), drawing_area);
+
+ GtkWidget *quit_button = gtk_button_new_with_label ("Quit");
+ g_signal_connect_swapped (quit_button, "clicked", G_CALLBACK (gtk_window_destroy), window);
+ gtk_box_append (GTK_BOX (vbox), quit_button);
+
+ g_timeout_add (50, (GSourceFunc) timer, drawing_area);
+
+ gtk_window_present (GTK_WINDOW (window));
+}
+
+int main (int argc, char **argv)
+{
+ GtkApplication *app = gtk_application_new ("de.hs-bochum.cvh.hp.hello-gtk", G_APPLICATION_DEFAULT_FLAGS);
+ g_signal_connect (app, "activate", G_CALLBACK (activate), NULL);
+ int status = g_application_run (G_APPLICATION (app), argc, argv);
+ g_object_unref (app);
+ return status;
+}
diff --git a/20231123/wurf-03.c b/20231123/wurf-03.c
new file mode 100644
index 0000000000000000000000000000000000000000..b2fea184068d5f4d769fffa19f5a1c0032b4945d
--- /dev/null
+++ b/20231123/wurf-03.c
@@ -0,0 +1,56 @@
+#include <gtk/gtk.h>
+
+#define WIDTH 1024
+#define HEIGHT 768
+
+double x = 137;
+double y = 255;
+
+static void draw (GtkDrawingArea *drawing_area, cairo_t *c,
+ int width, int height, gpointer user_data)
+{
+ GdkRGBA blue = { 0.0, 0.5, 1.0, 1.0 };
+
+ gdk_cairo_set_source_rgba (c, &blue);
+ cairo_arc (c, x, y, 10, 0, 2 * G_PI);
+ cairo_fill (c);
+}
+
+gboolean timer (GtkWidget *widget)
+{
+ x += 3;
+ y += 2;
+ gtk_widget_queue_draw (widget);
+ return TRUE;
+}
+
+static void activate (GtkApplication *app, gpointer user_data)
+{
+ GtkWidget *window = gtk_application_window_new (app);
+ gtk_window_set_title (GTK_WINDOW (window), "Hello");
+
+ GtkWidget *vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 5);
+ gtk_window_set_child (GTK_WINDOW (window), vbox);
+
+ GtkWidget *drawing_area = gtk_drawing_area_new ();
+ gtk_widget_set_size_request (drawing_area, WIDTH, HEIGHT);
+ gtk_drawing_area_set_draw_func (GTK_DRAWING_AREA (drawing_area), draw, NULL, NULL);
+ gtk_box_append (GTK_BOX (vbox), drawing_area);
+
+ GtkWidget *quit_button = gtk_button_new_with_label ("Quit");
+ g_signal_connect_swapped (quit_button, "clicked", G_CALLBACK (gtk_window_destroy), window);
+ gtk_box_append (GTK_BOX (vbox), quit_button);
+
+ g_timeout_add (50, (GSourceFunc) timer, drawing_area);
+
+ gtk_window_present (GTK_WINDOW (window));
+}
+
+int main (int argc, char **argv)
+{
+ GtkApplication *app = gtk_application_new ("de.hs-bochum.cvh.hp.hello-gtk", G_APPLICATION_DEFAULT_FLAGS);
+ g_signal_connect (app, "activate", G_CALLBACK (activate), NULL);
+ int status = g_application_run (G_APPLICATION (app), argc, argv);
+ g_object_unref (app);
+ return status;
+}
diff --git a/20231123/wurf-04.c b/20231123/wurf-04.c
new file mode 100644
index 0000000000000000000000000000000000000000..8cfb17dfd27878ec2d0bd66bddf651ec2ee9dacc
--- /dev/null
+++ b/20231123/wurf-04.c
@@ -0,0 +1,59 @@
+#include <gtk/gtk.h>
+
+#define WIDTH 1024
+#define HEIGHT 768
+
+double x = 0.0;
+double y = 2.0;
+double vx = 2.0;
+double vy = 1.0;
+double dt = 0.05;
+
+static void draw (GtkDrawingArea *drawing_area, cairo_t *c,
+ int width, int height, gpointer user_data)
+{
+ GdkRGBA blue = { 0.0, 0.5, 1.0, 1.0 };
+
+ gdk_cairo_set_source_rgba (c, &blue);
+ cairo_arc (c, x * 10.0, HEIGHT - y * 10, 10, 0, 2 * G_PI);
+ cairo_fill (c);
+}
+
+gboolean timer (GtkWidget *widget)
+{
+ x += vx * dt;
+ y += vy * dt;
+ gtk_widget_queue_draw (widget);
+ return TRUE;
+}
+
+static void activate (GtkApplication *app, gpointer user_data)
+{
+ GtkWidget *window = gtk_application_window_new (app);
+ gtk_window_set_title (GTK_WINDOW (window), "Hello");
+
+ GtkWidget *vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 5);
+ gtk_window_set_child (GTK_WINDOW (window), vbox);
+
+ GtkWidget *drawing_area = gtk_drawing_area_new ();
+ gtk_widget_set_size_request (drawing_area, WIDTH, HEIGHT);
+ gtk_drawing_area_set_draw_func (GTK_DRAWING_AREA (drawing_area), draw, NULL, NULL);
+ gtk_box_append (GTK_BOX (vbox), drawing_area);
+
+ GtkWidget *quit_button = gtk_button_new_with_label ("Quit");
+ g_signal_connect_swapped (quit_button, "clicked", G_CALLBACK (gtk_window_destroy), window);
+ gtk_box_append (GTK_BOX (vbox), quit_button);
+
+ g_timeout_add (50, (GSourceFunc) timer, drawing_area);
+
+ gtk_window_present (GTK_WINDOW (window));
+}
+
+int main (int argc, char **argv)
+{
+ GtkApplication *app = gtk_application_new ("de.hs-bochum.cvh.hp.hello-gtk", G_APPLICATION_DEFAULT_FLAGS);
+ g_signal_connect (app, "activate", G_CALLBACK (activate), NULL);
+ int status = g_application_run (G_APPLICATION (app), argc, argv);
+ g_object_unref (app);
+ return status;
+}
diff --git a/20231123/wurf-05.c b/20231123/wurf-05.c
new file mode 100644
index 0000000000000000000000000000000000000000..1c8dfc33ae5471624ca1f722419275bc22c4ecfe
--- /dev/null
+++ b/20231123/wurf-05.c
@@ -0,0 +1,59 @@
+#include <gtk/gtk.h>
+
+#define WIDTH 1024
+#define HEIGHT 768
+
+double x = 0.0;
+double y = 2.0;
+double vx = 2.0;
+double vy = 1.0;
+double dt = 0.2;
+
+static void draw (GtkDrawingArea *drawing_area, cairo_t *c,
+ int width, int height, gpointer user_data)
+{
+ GdkRGBA blue = { 0.0, 0.5, 1.0, 1.0 };
+
+ gdk_cairo_set_source_rgba (c, &blue);
+ cairo_arc (c, x * 10.0, HEIGHT - y * 10, 10, 0, 2 * G_PI);
+ cairo_fill (c);
+}
+
+gboolean timer (GtkWidget *widget)
+{
+ x += vx * dt;
+ y += vy * dt;
+ gtk_widget_queue_draw (widget);
+ return TRUE;
+}
+
+static void activate (GtkApplication *app, gpointer user_data)
+{
+ GtkWidget *window = gtk_application_window_new (app);
+ gtk_window_set_title (GTK_WINDOW (window), "Hello");
+
+ GtkWidget *vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 5);
+ gtk_window_set_child (GTK_WINDOW (window), vbox);
+
+ GtkWidget *drawing_area = gtk_drawing_area_new ();
+ gtk_widget_set_size_request (drawing_area, WIDTH, HEIGHT);
+ gtk_drawing_area_set_draw_func (GTK_DRAWING_AREA (drawing_area), draw, NULL, NULL);
+ gtk_box_append (GTK_BOX (vbox), drawing_area);
+
+ GtkWidget *quit_button = gtk_button_new_with_label ("Quit");
+ g_signal_connect_swapped (quit_button, "clicked", G_CALLBACK (gtk_window_destroy), window);
+ gtk_box_append (GTK_BOX (vbox), quit_button);
+
+ g_timeout_add (50, (GSourceFunc) timer, drawing_area);
+
+ gtk_window_present (GTK_WINDOW (window));
+}
+
+int main (int argc, char **argv)
+{
+ GtkApplication *app = gtk_application_new ("de.hs-bochum.cvh.hp.hello-gtk", G_APPLICATION_DEFAULT_FLAGS);
+ g_signal_connect (app, "activate", G_CALLBACK (activate), NULL);
+ int status = g_application_run (G_APPLICATION (app), argc, argv);
+ g_object_unref (app);
+ return status;
+}
diff --git a/20231123/wurf-06.c b/20231123/wurf-06.c
new file mode 100644
index 0000000000000000000000000000000000000000..1f1370f0b2173443ed737a6c01c0c0ccf639ac52
--- /dev/null
+++ b/20231123/wurf-06.c
@@ -0,0 +1,62 @@
+#include <gtk/gtk.h>
+
+#define WIDTH 1024
+#define HEIGHT 768
+
+double x = 0.0;
+double y = 2.0;
+double vx = 2.0;
+double vy = 1.0;
+double dt = 0.2;
+double g = 9.81;
+
+static void draw (GtkDrawingArea *drawing_area, cairo_t *c,
+ int width, int height, gpointer user_data)
+{
+ GdkRGBA blue = { 0.0, 0.5, 1.0, 1.0 };
+
+ gdk_cairo_set_source_rgba (c, &blue);
+ cairo_arc (c, x * 10.0, HEIGHT - y * 10, 10, 0, 2 * G_PI);
+ cairo_fill (c);
+}
+
+gboolean timer (GtkWidget *widget)
+{
+ x += vx * dt;
+ y += vy * dt;
+ vx += 0.0 * dt;
+ vy += -g * dt;
+ gtk_widget_queue_draw (widget);
+ return TRUE;
+}
+
+static void activate (GtkApplication *app, gpointer user_data)
+{
+ GtkWidget *window = gtk_application_window_new (app);
+ gtk_window_set_title (GTK_WINDOW (window), "Hello");
+
+ GtkWidget *vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 5);
+ gtk_window_set_child (GTK_WINDOW (window), vbox);
+
+ GtkWidget *drawing_area = gtk_drawing_area_new ();
+ gtk_widget_set_size_request (drawing_area, WIDTH, HEIGHT);
+ gtk_drawing_area_set_draw_func (GTK_DRAWING_AREA (drawing_area), draw, NULL, NULL);
+ gtk_box_append (GTK_BOX (vbox), drawing_area);
+
+ GtkWidget *quit_button = gtk_button_new_with_label ("Quit");
+ g_signal_connect_swapped (quit_button, "clicked", G_CALLBACK (gtk_window_destroy), window);
+ gtk_box_append (GTK_BOX (vbox), quit_button);
+
+ g_timeout_add (50, (GSourceFunc) timer, drawing_area);
+
+ gtk_window_present (GTK_WINDOW (window));
+}
+
+int main (int argc, char **argv)
+{
+ GtkApplication *app = gtk_application_new ("de.hs-bochum.cvh.hp.hello-gtk", G_APPLICATION_DEFAULT_FLAGS);
+ g_signal_connect (app, "activate", G_CALLBACK (activate), NULL);
+ int status = g_application_run (G_APPLICATION (app), argc, argv);
+ g_object_unref (app);
+ return status;
+}
diff --git a/20231123/wurf-07.c b/20231123/wurf-07.c
new file mode 100644
index 0000000000000000000000000000000000000000..de7172075b6f7210f649c549cd1ba647d82dd862
--- /dev/null
+++ b/20231123/wurf-07.c
@@ -0,0 +1,62 @@
+#include <gtk/gtk.h>
+
+#define WIDTH 1024
+#define HEIGHT 768
+
+double x = 0.0;
+double y = 2.0;
+double vx = 2.0;
+double vy = 1.0;
+double dt = 0.2;
+double g = 0.1;
+
+static void draw (GtkDrawingArea *drawing_area, cairo_t *c,
+ int width, int height, gpointer user_data)
+{
+ GdkRGBA blue = { 0.0, 0.5, 1.0, 1.0 };
+
+ gdk_cairo_set_source_rgba (c, &blue);
+ cairo_arc (c, x * 10.0, HEIGHT - y * 10, 10, 0, 2 * G_PI);
+ cairo_fill (c);
+}
+
+gboolean timer (GtkWidget *widget)
+{
+ x += vx * dt;
+ y += vy * dt;
+ vx += 0.0 * dt;
+ vy += -g * dt;
+ gtk_widget_queue_draw (widget);
+ return TRUE;
+}
+
+static void activate (GtkApplication *app, gpointer user_data)
+{
+ GtkWidget *window = gtk_application_window_new (app);
+ gtk_window_set_title (GTK_WINDOW (window), "Hello");
+
+ GtkWidget *vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 5);
+ gtk_window_set_child (GTK_WINDOW (window), vbox);
+
+ GtkWidget *drawing_area = gtk_drawing_area_new ();
+ gtk_widget_set_size_request (drawing_area, WIDTH, HEIGHT);
+ gtk_drawing_area_set_draw_func (GTK_DRAWING_AREA (drawing_area), draw, NULL, NULL);
+ gtk_box_append (GTK_BOX (vbox), drawing_area);
+
+ GtkWidget *quit_button = gtk_button_new_with_label ("Quit");
+ g_signal_connect_swapped (quit_button, "clicked", G_CALLBACK (gtk_window_destroy), window);
+ gtk_box_append (GTK_BOX (vbox), quit_button);
+
+ g_timeout_add (50, (GSourceFunc) timer, drawing_area);
+
+ gtk_window_present (GTK_WINDOW (window));
+}
+
+int main (int argc, char **argv)
+{
+ GtkApplication *app = gtk_application_new ("de.hs-bochum.cvh.hp.hello-gtk", G_APPLICATION_DEFAULT_FLAGS);
+ g_signal_connect (app, "activate", G_CALLBACK (activate), NULL);
+ int status = g_application_run (G_APPLICATION (app), argc, argv);
+ g_object_unref (app);
+ return status;
+}
diff --git a/20231123/wurf-08.c b/20231123/wurf-08.c
new file mode 100644
index 0000000000000000000000000000000000000000..7faeb0db95337ec53c3352d5a4f6caa91a8a822e
--- /dev/null
+++ b/20231123/wurf-08.c
@@ -0,0 +1,62 @@
+#include <gtk/gtk.h>
+
+#define WIDTH 1024
+#define HEIGHT 768
+
+double x = 0.0;
+double y = 6.0;
+double vx = 1.5;
+double vy = 4.0;
+double dt = 0.5;
+double g = 0.2;
+
+static void draw (GtkDrawingArea *drawing_area, cairo_t *c,
+ int width, int height, gpointer user_data)
+{
+ GdkRGBA blue = { 0.0, 0.5, 1.0, 1.0 };
+
+ gdk_cairo_set_source_rgba (c, &blue);
+ cairo_arc (c, x * 10.0, HEIGHT - y * 10, 10, 0, 2 * G_PI);
+ cairo_fill (c);
+}
+
+gboolean timer (GtkWidget *widget)
+{
+ x += vx * dt;
+ y += vy * dt;
+ vx += 0.0 * dt;
+ vy += -g * dt;
+ gtk_widget_queue_draw (widget);
+ return TRUE;
+}
+
+static void activate (GtkApplication *app, gpointer user_data)
+{
+ GtkWidget *window = gtk_application_window_new (app);
+ gtk_window_set_title (GTK_WINDOW (window), "Hello");
+
+ GtkWidget *vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 5);
+ gtk_window_set_child (GTK_WINDOW (window), vbox);
+
+ GtkWidget *drawing_area = gtk_drawing_area_new ();
+ gtk_widget_set_size_request (drawing_area, WIDTH, HEIGHT);
+ gtk_drawing_area_set_draw_func (GTK_DRAWING_AREA (drawing_area), draw, NULL, NULL);
+ gtk_box_append (GTK_BOX (vbox), drawing_area);
+
+ GtkWidget *quit_button = gtk_button_new_with_label ("Quit");
+ g_signal_connect_swapped (quit_button, "clicked", G_CALLBACK (gtk_window_destroy), window);
+ gtk_box_append (GTK_BOX (vbox), quit_button);
+
+ g_timeout_add (50, (GSourceFunc) timer, drawing_area);
+
+ gtk_window_present (GTK_WINDOW (window));
+}
+
+int main (int argc, char **argv)
+{
+ GtkApplication *app = gtk_application_new ("de.hs-bochum.cvh.hp.hello-gtk", G_APPLICATION_DEFAULT_FLAGS);
+ g_signal_connect (app, "activate", G_CALLBACK (activate), NULL);
+ int status = g_application_run (G_APPLICATION (app), argc, argv);
+ g_object_unref (app);
+ return status;
+}
diff --git a/20231123/wurf-09.c b/20231123/wurf-09.c
new file mode 100644
index 0000000000000000000000000000000000000000..51683e733db0079c49387e09211aec93de8ca834
--- /dev/null
+++ b/20231123/wurf-09.c
@@ -0,0 +1,63 @@
+#include <gtk/gtk.h>
+
+#define WIDTH 1024
+#define HEIGHT 768
+
+double x = 0.0;
+double y = 6.0;
+double vx = 1.5;
+double vy = 4.0;
+double cw = 0.02;
+double dt = 0.5;
+double g = 0.2;
+
+static void draw (GtkDrawingArea *drawing_area, cairo_t *c,
+ int width, int height, gpointer user_data)
+{
+ GdkRGBA blue = { 0.0, 0.5, 1.0, 1.0 };
+
+ gdk_cairo_set_source_rgba (c, &blue);
+ cairo_arc (c, x * 10.0, HEIGHT - y * 10, 10, 0, 2 * G_PI);
+ cairo_fill (c);
+}
+
+gboolean timer (GtkWidget *widget)
+{
+ x += vx * dt;
+ y += vy * dt;
+ vx += - cw * vx * vx * dt;
+ vy += -g * dt - cw * vy * vy * dt;
+ gtk_widget_queue_draw (widget);
+ return TRUE;
+}
+
+static void activate (GtkApplication *app, gpointer user_data)
+{
+ GtkWidget *window = gtk_application_window_new (app);
+ gtk_window_set_title (GTK_WINDOW (window), "Hello");
+
+ GtkWidget *vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 5);
+ gtk_window_set_child (GTK_WINDOW (window), vbox);
+
+ GtkWidget *drawing_area = gtk_drawing_area_new ();
+ gtk_widget_set_size_request (drawing_area, WIDTH, HEIGHT);
+ gtk_drawing_area_set_draw_func (GTK_DRAWING_AREA (drawing_area), draw, NULL, NULL);
+ gtk_box_append (GTK_BOX (vbox), drawing_area);
+
+ GtkWidget *quit_button = gtk_button_new_with_label ("Quit");
+ g_signal_connect_swapped (quit_button, "clicked", G_CALLBACK (gtk_window_destroy), window);
+ gtk_box_append (GTK_BOX (vbox), quit_button);
+
+ g_timeout_add (50, (GSourceFunc) timer, drawing_area);
+
+ gtk_window_present (GTK_WINDOW (window));
+}
+
+int main (int argc, char **argv)
+{
+ GtkApplication *app = gtk_application_new ("de.hs-bochum.cvh.hp.hello-gtk", G_APPLICATION_DEFAULT_FLAGS);
+ g_signal_connect (app, "activate", G_CALLBACK (activate), NULL);
+ int status = g_application_run (G_APPLICATION (app), argc, argv);
+ g_object_unref (app);
+ return status;
+}
diff --git a/20231123/wurf-10.c b/20231123/wurf-10.c
new file mode 100644
index 0000000000000000000000000000000000000000..c92dcb410016295fdac786d40e72f3d31a525511
--- /dev/null
+++ b/20231123/wurf-10.c
@@ -0,0 +1,65 @@
+#include <gtk/gtk.h>
+
+#define WIDTH 1024
+#define HEIGHT 768
+
+double x = 0.0;
+double y = 6.0;
+double vx = 1.5;
+double vy = 4.0;
+double cw = 0.02;
+double dt = 0.5;
+double g = 0.2;
+
+static void draw (GtkDrawingArea *drawing_area, cairo_t *c,
+ int width, int height, gpointer user_data)
+{
+ GdkRGBA blue = { 0.0, 0.5, 1.0, 1.0 };
+
+ gdk_cairo_set_source_rgba (c, &blue);
+ cairo_arc (c, x * 10.0, HEIGHT - y * 10, 10, 0, 2 * G_PI);
+ cairo_fill (c);
+}
+
+gboolean timer (GtkWidget *widget)
+{
+ x += vx * dt;
+ y += vy * dt;
+ if (y <= 0)
+ vy = -vy;
+ vx += - cw * vx * vx * dt;
+ vy += -g * dt - cw * vy * vy * dt;
+ gtk_widget_queue_draw (widget);
+ return TRUE;
+}
+
+static void activate (GtkApplication *app, gpointer user_data)
+{
+ GtkWidget *window = gtk_application_window_new (app);
+ gtk_window_set_title (GTK_WINDOW (window), "Hello");
+
+ GtkWidget *vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 5);
+ gtk_window_set_child (GTK_WINDOW (window), vbox);
+
+ GtkWidget *drawing_area = gtk_drawing_area_new ();
+ gtk_widget_set_size_request (drawing_area, WIDTH, HEIGHT);
+ gtk_drawing_area_set_draw_func (GTK_DRAWING_AREA (drawing_area), draw, NULL, NULL);
+ gtk_box_append (GTK_BOX (vbox), drawing_area);
+
+ GtkWidget *quit_button = gtk_button_new_with_label ("Quit");
+ g_signal_connect_swapped (quit_button, "clicked", G_CALLBACK (gtk_window_destroy), window);
+ gtk_box_append (GTK_BOX (vbox), quit_button);
+
+ g_timeout_add (50, (GSourceFunc) timer, drawing_area);
+
+ gtk_window_present (GTK_WINDOW (window));
+}
+
+int main (int argc, char **argv)
+{
+ GtkApplication *app = gtk_application_new ("de.hs-bochum.cvh.hp.hello-gtk", G_APPLICATION_DEFAULT_FLAGS);
+ g_signal_connect (app, "activate", G_CALLBACK (activate), NULL);
+ int status = g_application_run (G_APPLICATION (app), argc, argv);
+ g_object_unref (app);
+ return status;
+}
diff --git a/20231123/wurf-11.c b/20231123/wurf-11.c
new file mode 100644
index 0000000000000000000000000000000000000000..8fed86ef4aad03fc6f3712933099c9a769f345a4
--- /dev/null
+++ b/20231123/wurf-11.c
@@ -0,0 +1,67 @@
+#include <gtk/gtk.h>
+
+#define WIDTH 1024
+#define HEIGHT 768
+
+double x = 0.0;
+double y = 6.0;
+double vx = 1.5;
+double vy = 4.0;
+double cw = 0.02;
+double dt = 0.5;
+double g = 0.2;
+
+static void draw (GtkDrawingArea *drawing_area, cairo_t *c,
+ int width, int height, gpointer user_data)
+{
+ GdkRGBA blue = { 0.0, 0.5, 1.0, 1.0 };
+
+ gdk_cairo_set_source_rgba (c, &blue);
+ cairo_arc (c, x * 10.0, HEIGHT - y * 10, 10, 0, 2 * G_PI);
+ cairo_fill (c);
+}
+
+gboolean timer (GtkWidget *widget)
+{
+ x += vx * dt;
+ y += vy * dt;
+ if (y <= 0)
+ vy = -vy;
+ if (x * 10.0 >= WIDTH)
+ vx = -vx;
+ vx += - cw * vx * vx * dt;
+ vy += -g * dt - cw * vy * vy * dt;
+ gtk_widget_queue_draw (widget);
+ return TRUE;
+}
+
+static void activate (GtkApplication *app, gpointer user_data)
+{
+ GtkWidget *window = gtk_application_window_new (app);
+ gtk_window_set_title (GTK_WINDOW (window), "Hello");
+
+ GtkWidget *vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 5);
+ gtk_window_set_child (GTK_WINDOW (window), vbox);
+
+ GtkWidget *drawing_area = gtk_drawing_area_new ();
+ gtk_widget_set_size_request (drawing_area, WIDTH, HEIGHT);
+ gtk_drawing_area_set_draw_func (GTK_DRAWING_AREA (drawing_area), draw, NULL, NULL);
+ gtk_box_append (GTK_BOX (vbox), drawing_area);
+
+ GtkWidget *quit_button = gtk_button_new_with_label ("Quit");
+ g_signal_connect_swapped (quit_button, "clicked", G_CALLBACK (gtk_window_destroy), window);
+ gtk_box_append (GTK_BOX (vbox), quit_button);
+
+ g_timeout_add (50, (GSourceFunc) timer, drawing_area);
+
+ gtk_window_present (GTK_WINDOW (window));
+}
+
+int main (int argc, char **argv)
+{
+ GtkApplication *app = gtk_application_new ("de.hs-bochum.cvh.hp.hello-gtk", G_APPLICATION_DEFAULT_FLAGS);
+ g_signal_connect (app, "activate", G_CALLBACK (activate), NULL);
+ int status = g_application_run (G_APPLICATION (app), argc, argv);
+ g_object_unref (app);
+ return status;
+}
diff --git a/20231123/wurf-12.c b/20231123/wurf-12.c
new file mode 100644
index 0000000000000000000000000000000000000000..84e97130cc2caa5181082c6544e3330b9c5b2525
--- /dev/null
+++ b/20231123/wurf-12.c
@@ -0,0 +1,67 @@
+#include <gtk/gtk.h>
+
+#define WIDTH 1024
+#define HEIGHT 768
+
+double x = 0.0;
+double y = 6.0;
+double vx = 3.0;
+double vy = 4.0;
+double cw = 0.02;
+double dt = 0.5;
+double g = 0.2;
+
+static void draw (GtkDrawingArea *drawing_area, cairo_t *c,
+ int width, int height, gpointer user_data)
+{
+ GdkRGBA blue = { 0.0, 0.5, 1.0, 1.0 };
+
+ gdk_cairo_set_source_rgba (c, &blue);
+ cairo_arc (c, x * 10.0, HEIGHT - y * 10, 10, 0, 2 * G_PI);
+ cairo_fill (c);
+}
+
+gboolean timer (GtkWidget *widget)
+{
+ x += vx * dt;
+ y += vy * dt;
+ if (y <= 0)
+ vy = -vy;
+ if (x * 10.0 >= WIDTH)
+ vx = -vx;
+ vx += - cw * vx * vx * dt;
+ vy += -g * dt - cw * vy * vy * dt;
+ gtk_widget_queue_draw (widget);
+ return TRUE;
+}
+
+static void activate (GtkApplication *app, gpointer user_data)
+{
+ GtkWidget *window = gtk_application_window_new (app);
+ gtk_window_set_title (GTK_WINDOW (window), "Hello");
+
+ GtkWidget *vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 5);
+ gtk_window_set_child (GTK_WINDOW (window), vbox);
+
+ GtkWidget *drawing_area = gtk_drawing_area_new ();
+ gtk_widget_set_size_request (drawing_area, WIDTH, HEIGHT);
+ gtk_drawing_area_set_draw_func (GTK_DRAWING_AREA (drawing_area), draw, NULL, NULL);
+ gtk_box_append (GTK_BOX (vbox), drawing_area);
+
+ GtkWidget *quit_button = gtk_button_new_with_label ("Quit");
+ g_signal_connect_swapped (quit_button, "clicked", G_CALLBACK (gtk_window_destroy), window);
+ gtk_box_append (GTK_BOX (vbox), quit_button);
+
+ g_timeout_add (50, (GSourceFunc) timer, drawing_area);
+
+ gtk_window_present (GTK_WINDOW (window));
+}
+
+int main (int argc, char **argv)
+{
+ GtkApplication *app = gtk_application_new ("de.hs-bochum.cvh.hp.hello-gtk", G_APPLICATION_DEFAULT_FLAGS);
+ g_signal_connect (app, "activate", G_CALLBACK (activate), NULL);
+ int status = g_application_run (G_APPLICATION (app), argc, argv);
+ g_object_unref (app);
+ return status;
+}
diff --git a/20231123/wurf-13.c b/20231123/wurf-13.c
new file mode 100644
index 0000000000000000000000000000000000000000..ea10a27f8ff1b275d6b859529593487be5953239
--- /dev/null
+++ b/20231123/wurf-13.c
@@ -0,0 +1,73 @@
+#include <gtk/gtk.h>
+
+#define WIDTH 1024
+#define HEIGHT 768
+
+double x = 0.0;
+double y = 6.0;
+double vx = 3.0;
+double vy = 4.0;
+double cw = 0.01;
+double dt = 0.5;
+double g = 0.2;
+
+static void draw (GtkDrawingArea *drawing_area, cairo_t *c,
+ int width, int height, gpointer user_data)
+{
+ GdkRGBA blue = { 0.0, 0.5, 1.0, 1.0 };
+
+ gdk_cairo_set_source_rgba (c, &blue);
+ cairo_arc (c, x * 10.0, HEIGHT - y * 10, 10, 0, 2 * G_PI);
+ cairo_fill (c);
+}
+
+gboolean timer (GtkWidget *widget)
+{
+ x += vx * dt;
+ y += vy * dt;
+ if (y <= 0)
+ vy = -vy;
+ if (x * 10.0 >= WIDTH)
+ vx = -vx;
+ if (vx > 0)
+ vx += - cw * vx * vx * dt;
+ else
+ vx += cw * vx * vx * dt;
+ if (vy > 0)
+ vy += -g * dt - cw * vy * vy * dt;
+ else
+ vy += -g * dt + cw * vy * vy * dt;
+ gtk_widget_queue_draw (widget);
+ return TRUE;
+}
+
+static void activate (GtkApplication *app, gpointer user_data)
+{
+ GtkWidget *window = gtk_application_window_new (app);
+ gtk_window_set_title (GTK_WINDOW (window), "Hello");
+
+ GtkWidget *vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 5);
+ gtk_window_set_child (GTK_WINDOW (window), vbox);
+
+ GtkWidget *drawing_area = gtk_drawing_area_new ();
+ gtk_widget_set_size_request (drawing_area, WIDTH, HEIGHT);
+ gtk_drawing_area_set_draw_func (GTK_DRAWING_AREA (drawing_area), draw, NULL, NULL);
+ gtk_box_append (GTK_BOX (vbox), drawing_area);
+
+ GtkWidget *quit_button = gtk_button_new_with_label ("Quit");
+ g_signal_connect_swapped (quit_button, "clicked", G_CALLBACK (gtk_window_destroy), window);
+ gtk_box_append (GTK_BOX (vbox), quit_button);
+
+ g_timeout_add (50, (GSourceFunc) timer, drawing_area);
+
+ gtk_window_present (GTK_WINDOW (window));
+}
+
+int main (int argc, char **argv)
+{
+ GtkApplication *app = gtk_application_new ("de.hs-bochum.cvh.hp.hello-gtk", G_APPLICATION_DEFAULT_FLAGS);
+ g_signal_connect (app, "activate", G_CALLBACK (activate), NULL);
+ int status = g_application_run (G_APPLICATION (app), argc, argv);
+ g_object_unref (app);
+ return status;
+}
diff --git a/20231123/wurf-14.c b/20231123/wurf-14.c
new file mode 100644
index 0000000000000000000000000000000000000000..a6e83845ebfc3b171242973795273cdedb49efeb
--- /dev/null
+++ b/20231123/wurf-14.c
@@ -0,0 +1,84 @@
+#include <gtk/gtk.h>
+
+#define WIDTH 1024
+#define HEIGHT 768
+
+double x = 0.0;
+double y = 6.0;
+double vx = 3.0;
+double vy = 4.0;
+double cw = 0.005;
+double dt = 0.5;
+double g = 0.2;
+
+static void draw (GtkDrawingArea *drawing_area, cairo_t *c,
+ int width, int height, gpointer user_data)
+{
+ GdkRGBA blue = { 0.0, 0.5, 1.0, 1.0 };
+
+ gdk_cairo_set_source_rgba (c, &blue);
+ cairo_arc (c, x * 10.0, HEIGHT - y * 10, 10, 0, 2 * G_PI);
+ cairo_fill (c);
+}
+
+gboolean timer (GtkWidget *widget)
+{
+ x += vx * dt;
+ y += vy * dt;
+ if (y <= 0.0)
+ {
+ y = 0.0;
+ vy = -vy;
+ }
+ if (x * 10.0 >= WIDTH)
+ {
+ x = WIDTH * 0.1;
+ vx = -vx;
+ }
+ if ( x <= 0.0)
+ {
+ x = 0.0;
+ vx = -vx;
+ }
+ if (vx > 0)
+ vx += - cw * vx * vx * dt;
+ else
+ vx += cw * vx * vx * dt;
+ if (vy > 0)
+ vy += -g * dt - cw * vy * vy * dt;
+ else
+ vy += -g * dt + cw * vy * vy * dt;
+ gtk_widget_queue_draw (widget);
+ return TRUE;
+}
+
+static void activate (GtkApplication *app, gpointer user_data)
+{
+ GtkWidget *window = gtk_application_window_new (app);
+ gtk_window_set_title (GTK_WINDOW (window), "Hello");
+
+ GtkWidget *vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 5);
+ gtk_window_set_child (GTK_WINDOW (window), vbox);
+
+ GtkWidget *drawing_area = gtk_drawing_area_new ();
+ gtk_widget_set_size_request (drawing_area, WIDTH, HEIGHT);
+ gtk_drawing_area_set_draw_func (GTK_DRAWING_AREA (drawing_area), draw, NULL, NULL);
+ gtk_box_append (GTK_BOX (vbox), drawing_area);
+
+ GtkWidget *quit_button = gtk_button_new_with_label ("Quit");
+ g_signal_connect_swapped (quit_button, "clicked", G_CALLBACK (gtk_window_destroy), window);
+ gtk_box_append (GTK_BOX (vbox), quit_button);
+
+ g_timeout_add (50, (GSourceFunc) timer, drawing_area);
+
+ gtk_window_present (GTK_WINDOW (window));
+}
+
+int main (int argc, char **argv)
+{
+ GtkApplication *app = gtk_application_new ("de.hs-bochum.cvh.hp.hello-gtk", G_APPLICATION_DEFAULT_FLAGS);
+ g_signal_connect (app, "activate", G_CALLBACK (activate), NULL);
+ int status = g_application_run (G_APPLICATION (app), argc, argv);
+ g_object_unref (app);
+ return status;
+}