From: Andy Spencer <andy753421@gmail.com>
Date: Sat, 23 Jan 2010 00:00:54 +0000 (+0000)
Subject: Template for tessellation example, currently broke
X-Git-Tag: v0.4~140
X-Git-Url: http://pileus.org/git/?p=grits;a=commitdiff_plain;h=6b3c66017c6b7f8ea7b95d0b867777bc17525b2c

Template for tessellation example, currently broke
---

diff --git a/examples/sorting/.gitignore b/examples/sorting/.gitignore
index ff6c75e..005dc9a 100644
--- a/examples/sorting/.gitignore
+++ b/examples/sorting/.gitignore
@@ -1 +1,2 @@
 sort
+tes
diff --git a/examples/sorting/mkfile b/examples/sorting/mkfile
index c432924..e65f26d 100644
--- a/examples/sorting/mkfile
+++ b/examples/sorting/mkfile
@@ -1,6 +1,7 @@
 MKSHELL=/usr/lib/plan9/bin/rc
-PROGS=sort
-sort_libs=`{pkg-config --libs gtkglext-1.0}
-sort_cflags=`{pkg-config --cflags gtkglext-1.0}
-default:V: sort-run
+PROGS=sort tes
+LIBS=`{pkg-config --libs gtkglext-1.0}
+CFLAGS=-Wall -g '--std=c99' `{pkg-config --cflags gtkglext-1.0}
+
+default:V: tes-run
 <$HOME/lib/mkcommon
diff --git a/examples/sorting/tes.c b/examples/sorting/tes.c
new file mode 100644
index 0000000..135ce5e
--- /dev/null
+++ b/examples/sorting/tes.c
@@ -0,0 +1,109 @@
+#include <gtk/gtk.h>
+#include <gtk/gtkgl.h>
+#include <gdk/gdkkeysyms.h>
+#include <GL/gl.h>
+#include <GL/glu.h>
+#include <stdlib.h>
+
+static gboolean on_expose(GtkWidget *drawing, GdkEventExpose *event, gpointer _)
+{
+	//glClearColor(0.5, 0.5, 1.0, 1.0);
+	glClearColor(0.0, 0.0, 0.0, 0.0);
+	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+
+	/* No sorting, just add */
+	glEnable(GL_BLEND);
+	glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+	//glBlendFunc(GL_ONE, GL_ONE);
+
+	/* Lighting */
+	glMatrixMode(GL_MODELVIEW);
+	glLoadIdentity();
+	float light_ambient[]  = {0.3f, 0.3f, 0.1f, 1.0f};
+	float light_diffuse[]  = {0.9f, 0.9f, 0.9f, 1.0f};
+	float light_position[] = {-30.0f, 50.0f, 40.0f, 1.0f};
+	glLightfv(GL_LIGHT0, GL_AMBIENT,  light_ambient);
+	glLightfv(GL_LIGHT0, GL_DIFFUSE,  light_diffuse);
+	glLightfv(GL_LIGHT0, GL_POSITION, light_position);
+	glEnable(GL_COLOR_MATERIAL);
+	glEnable(GL_LIGHTING);
+	glEnable(GL_LIGHT0);
+
+	/* Projection */
+	glMatrixMode(GL_PROJECTION);
+	glLoadIdentity();
+	glFrustum(-1,1, -1,1, 2,10);
+
+	glMatrixMode(GL_MODELVIEW);
+	glLoadIdentity();
+	gluLookAt(0,2,-3, 0,0,0, 0,1,0);
+
+	/* Draw polys */
+	glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
+
+	glColor4f(1, 0, 0, 0.5);
+	glBegin(GL_TRIANGLE_STRIP);
+	glVertex3i(-1,  1,  1);
+	glVertex3i(-1, -1,  1);
+	glVertex3i( 1,  1, -1);
+	glVertex3i( 1, -1, -1);
+	glEnd();
+
+	glColor4f(0, 1, 0, 0.5);
+	glBegin(GL_TRIANGLE_STRIP);
+	glVertex3i( 1,  1,  1);
+	glVertex3i( 1, -1,  1);
+	glVertex3i(-1,  1, -1);
+	glVertex3i(-1, -1, -1);
+	glEnd();
+
+	/* Flush */
+	GdkGLDrawable *gldrawable = gdk_gl_drawable_get_current();
+	if (gdk_gl_drawable_is_double_buffered(gldrawable))
+		gdk_gl_drawable_swap_buffers(gldrawable);
+	else
+		glFlush();
+	return FALSE;
+}
+
+static gboolean on_configure(GtkWidget *drawing, GdkEventConfigure *event, gpointer _)
+{
+	glViewport(0, 0,
+		drawing->allocation.width,
+		drawing->allocation.height);
+	return FALSE;
+}
+
+static gboolean on_key_press(GtkWidget *widget, GdkEventKey *event, gpointer _)
+{
+	if (event->keyval == GDK_q)
+		gtk_main_quit();
+	return FALSE;
+}
+
+int main(int argc, char **argv)
+{
+	gtk_init(&argc, &argv);
+
+	GtkWidget   *window   = gtk_window_new(GTK_WINDOW_TOPLEVEL);
+	GtkWidget   *drawing  = gtk_drawing_area_new();
+	GdkGLConfig *glconfig = gdk_gl_config_new_by_mode((GdkGLConfigMode)(
+			GDK_GL_MODE_RGBA   | GDK_GL_MODE_DEPTH |
+			GDK_GL_MODE_DOUBLE | GDK_GL_MODE_ALPHA));
+	g_signal_connect(window,  "destroy",         G_CALLBACK(gtk_main_quit), NULL);
+	g_signal_connect(window,  "key-press-event", G_CALLBACK(on_key_press),  NULL);
+	g_signal_connect(drawing, "expose-event",    G_CALLBACK(on_expose),     NULL);
+	g_signal_connect(drawing, "configure-event", G_CALLBACK(on_configure),  NULL);
+	gtk_widget_set_gl_capability(drawing, glconfig, NULL, TRUE, GDK_GL_RGBA_TYPE);
+	gtk_container_add(GTK_CONTAINER(window), drawing);
+	gtk_widget_show_all(window);
+
+	/* OpenGL setup */
+	GdkGLContext  *glcontext  = gtk_widget_get_gl_context(GTK_WIDGET(drawing));
+	GdkGLDrawable *gldrawable = gtk_widget_get_gl_drawable(GTK_WIDGET(drawing));
+	gdk_gl_drawable_gl_begin(gldrawable, glcontext);
+
+	gtk_main();
+
+	gdk_gl_drawable_gl_end(gldrawable);
+}