1 files changed, 103 insertions, 0 deletions
diff --git a/projtest.c b/projtest.c
new file mode 100644
index 0000000..974bb28
--- /dev/null
+++ b/projtest.c
@@ -0,0 +1,103 @@
+#include <u.h>
+#include <libc.h>
+#include <thread.h>
+#include <draw.h>
+#include <memdraw.h>
+#include <mouse.h>
+#include <keyboard.h>
+#include <geometry.h>
+#include "libobj/obj.h"
+#include "libgraphics/graphics.h"
+#include "fns.h"
+
+Camera cam;
+
+void
+usage(void)
+{
+	fprint(2, "usage: %s\n", argv0);
+	exits("usage");
+}
+
+void
+threadmain(int argc, char *argv[])
+{
+	Point3 np, fp;
+	Framebuf *fb;
+
+	GEOMfmtinstall();
+	ARGBEGIN{
+	default: usage();
+	}ARGEND
+	if(argc != 0)
+		usage();
+
+	if(memimageinit() != 0)
+		sysfatal("memimageinit: %r");
+
+	placecamera(&cam, Pt3(0,0,1,1), Vec3(0,0,0), Vec3(0,1,0));
+	configcamera(&cam, mkviewport(Rect(0,0,640,480)), 40*DEG, 0.01, 10, PERSPECTIVE);
+
+	fb = cam.vp->getfb(cam.vp);
+	np = Pt3(0,0,-0.01,1);
+	fp = Pt3(0,0,-10,1);
+	fprint(2, "near %V\nfar %V\n", np, fp);
+	np = vcs2clip(&cam, np);
+	fp = vcs2clip(&cam, fp);
+	fprint(2, "E → C\n");
+	fprint(2, "near %V\n", np);
+	fprint(2, "far %V\n", fp);
+	np = clip2ndc(np);
+	fp = clip2ndc(fp);
+	fprint(2, "C → N\n");
+	fprint(2, "near %V\n", np);
+	fprint(2, "far %V\n", fp);
+	np = ndc2viewport(fb, np);
+	fp = ndc2viewport(fb, fp);
+	fprint(2, "N → V\n");
+	fprint(2, "near %V\n", np);
+	fprint(2, "far %V\n", fp);
+	np = viewport2ndc(fb, np);
+	fp = viewport2ndc(fb, fp);
+	fprint(2, "V → N\n");
+	fprint(2, "near %V\n", np);
+	fprint(2, "far %V\n", fp);
+	np = ndc2vcs(&cam, np);
+	fp = ndc2vcs(&cam, fp);
+	fprint(2, "N → E\n");
+	fprint(2, "near %V\n", np);
+	fprint(2, "far %V\n", fp);
+
+	fprint(2, "\n");
+	
+	np = Pt3(Dx(fb->r)/2.0,Dy(fb->r)/2.0,1,1);
+	fp = Pt3(Dx(fb->r)/2.0,Dy(fb->r)/2.0,0,1);
+	fprint(2, "near %V\nfar %V\n", np, fp);
+	np = viewport2ndc(fb, np);
+	fp = viewport2ndc(fb, fp);
+	fprint(2, "V → N\n");
+	fprint(2, "near %V\n", np);
+	fprint(2, "far %V\n", fp);
+	np = ndc2vcs(&cam, np);
+	fp = ndc2vcs(&cam, fp);
+	fprint(2, "N → E\n");
+	fprint(2, "near %V\n", np);
+	fprint(2, "far %V\n", fp);
+	np = vcs2clip(&cam, np);
+	fp = vcs2clip(&cam, fp);
+	fprint(2, "E → C\n");
+	fprint(2, "near %V\n", np);
+	fprint(2, "far %V\n", fp);
+	np = clip2ndc(np);
+	fp = clip2ndc(fp);
+	fprint(2, "C → N\n");
+	fprint(2, "near %V\n", np);
+	fprint(2, "far %V\n", fp);
+	np = ndc2viewport(fb, np);
+	fp = ndc2viewport(fb, fp);
+	fprint(2, "N → V\n");
+	fprint(2, "near %V\n", np);
+	fprint(2, "far %V\n", fp);
+
+	exits(nil);
+}