1 files changed, 112 insertions, 0 deletions
diff --git a/examples/cube.c b/examples/cube.c
new file mode 100644
index 0000000..ec47b13
--- /dev/null
+++ b/examples/cube.c
@@ -0,0 +1,112 @@
+/*
+ * mesacube - THE spinning cube
+ *
+ * Build:
+ *   cc -O2 -I$HOME/mesa/include -I$HOME -o cube cube.c \
+ *      $HOME/mesa/lib/libGL.a -lm
+ *
+ * Run: VERITE_UCODE=$HOME/v2000gl.uc \
+ *             ./cube [seconds]   (0 = spin until ^C)
+ */
+#include <sys/time.h>
+#include <math.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#include <GL/gl.h>
+#include <GL/vrmesa.h>
+
+static volatile sig_atomic_t stop;
+
+static void
+onint(int sig)
+{
+
+	(void)sig;
+	stop = 1;
+}
+
+static const GLfloat faces[6][4][3] = {
+	{ {-1,-1,-1},{-1, 1,-1},{ 1, 1,-1},{ 1,-1,-1} },	/* -Z */
+	{ {-1,-1, 1},{ 1,-1, 1},{ 1, 1, 1},{-1, 1, 1} },	/* +Z */
+	{ {-1,-1,-1},{-1,-1, 1},{-1, 1, 1},{-1, 1,-1} },	/* -X */
+	{ { 1,-1,-1},{ 1, 1,-1},{ 1, 1, 1},{ 1,-1, 1} },	/* +X */
+	{ {-1,-1,-1},{ 1,-1,-1},{ 1,-1, 1},{-1,-1, 1} },	/* -Y */
+	{ {-1, 1,-1},{-1, 1, 1},{ 1, 1, 1},{ 1, 1,-1} },	/* +Y */
+};
+
+int
+main(int argc, char **argv)
+{
+	vrMesaContext ctx;
+	struct timeval t0, t1, tstart;
+	float a = 20.0f, b = 30.0f;
+	double secs = 30.0;
+	int frame = 0, f, i;
+
+	if (argc > 1)
+		secs = atof(argv[1]);
+	signal(SIGINT, onint);
+
+	ctx = vrMesaCreateContext(NULL);
+	if (ctx == NULL)
+		return 1;
+	vrMesaMakeCurrent(ctx);
+	printf("GL_RENDERER: %s (%s)\n", glGetString(GL_RENDERER),
+	    glGetString(GL_VERSION));
+
+	glEnable(GL_DEPTH_TEST);
+	glEnable(GL_CULL_FACE);
+	glClearColor(0.06f, 0.07f, 0.12f, 1);
+	glViewport(0, 0, 640, 480);
+	glMatrixMode(GL_PROJECTION);
+	glLoadIdentity();
+	glFrustum(-1.0, 1.0, -0.75, 0.75, 1.0, 50.0);
+
+	gettimeofday(&tstart, NULL);
+	t0 = tstart;
+	while (!stop) {
+		glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+		glMatrixMode(GL_MODELVIEW);
+		glLoadIdentity();
+		glTranslatef(0, 0, -4.5f);
+		glRotatef(a, 1, 0, 0);
+		glRotatef(b, 0, 1, 0);
+
+		glBegin(GL_QUADS);
+		for (f = 0; f < 6; f++)
+			for (i = 0; i < 4; i++) {
+				const GLfloat *v = faces[f][i];
+
+				/* corner color = position in RGB space */
+				glColor3f((v[0] + 1) * 0.5f,
+				    (v[1] + 1) * 0.5f, (v[2] + 1) * 0.5f);
+				glVertex3fv(v);
+			}
+		glEnd();
+
+		vrMesaSwapBuffers();
+		a += 1.1f;
+		b += 1.7f;
+		if (++frame % 100 == 0) {
+			double dt;
+
+			gettimeofday(&t1, NULL);
+			dt = (t1.tv_sec - t0.tv_sec) +
+			    (t1.tv_usec - t0.tv_usec) / 1e6;
+			printf("%d frames, %.1f fps\n", frame, 100.0 / dt);
+			t0 = t1;
+		}
+		if (secs > 0) {
+			gettimeofday(&t1, NULL);
+			if ((t1.tv_sec - tstart.tv_sec) +
+			    (t1.tv_usec - tstart.tv_usec) / 1e6 >= secs)
+				break;
+		}
+	}
+
+	printf("mesacube done after %d frames\n", frame);
+	vrMesaDestroyContext(ctx);
+	return 0;
+}