shithub: 3dee

Download patch

ref: 0e1a5d4df2266fe0bc2fcf25050d2a1396ada0e8
parent: e0ec1a4e2f1bd72e3191e4d8b1d3dc6aab643a26
author: rodri <rgl@antares-labs.eu>
date: Fri Mar 14 19:29:04 EDT 2025 

new tool: stl


--- a/mkfile
+++ b/mkfile
@@ -8,6 +8,7 @@
 	projtest\
 	procgen\
 	obj\
+	stl\
 
 OFILES=\
 	alloc.$O\
@@ -18,6 +19,7 @@
 LIB=\
 	libgraphics/libgraphics.a$O\
 	libobj/libobj.a$O\
+	libstl/libstl.a$O\
 
 </sys/src/cmd/mkmany
 
@@ -29,16 +31,24 @@
 	cd libobj
 	mk install
 
+libstl/libstl.a$O:
+	cd libstl
+	mk install
+
 nuke∅dirs:VQ:
 	for(d in libgeometry libobj libgraphics)
 		rm -rf $d
 
 pulldeps:VQ: nuke∅dirs
+	git/clone git://antares-labs.eu/libgraphics || \
+	git/clone git://shithub.us/rodri/libgraphics || \
+	git/clone https://github.com/sametsisartenep/libgraphics
 	git/clone git://antares-labs.eu/libobj || \
 	git/clone git://shithub.us/rodri/libobj || \
 	git/clone https://github.com/sametsisartenep/libobj
-	git/clone git://antares-labs.eu/libgraphics || \
-	git/clone https://github.com/sametsisartenep/libgraphics
+	git/clone git://antares-labs.eu/libstl || \
+	git/clone git://shithub.us/rodri/libstl || \
+	git/clone https://github.com/sametsisartenep/libstl
 
 clean nuke:V:
 	rm -f *.[$OS] [$OS].out [$OS].^$TARG
--- a/obj.c
+++ b/obj.c
@@ -4,9 +4,9 @@
 #include <draw.h>
 #include <memdraw.h>
 #include <geometry.h>
-#include "libobj/obj.h"
 #include "libgraphics/graphics.h"
 #include "fns.h"
+#include "libobj/obj.h"
 
 /*
  * fan triangulation.
--- /dev/null
+++ b/stl.c
@@ -1,0 +1,85 @@
+#include <u.h>
+#include <libc.h>
+#include <thread.h>
+#include <draw.h>
+#include <memdraw.h>
+#include <geometry.h>
+#include "libgraphics/graphics.h"
+#include "fns.h"
+#include "libstl/stl.h"
+
+static int
+loadstlmodel(Model *m, Stl *stl)
+{
+	Primitive p;
+	Stltri **tri;
+
+	memset(&p, 0, sizeof p);
+	p.type = PTriangle;
+	p.v[0].c = p.v[1].c = p.v[2].c = Pt3(1,1,1,1);
+
+	for(tri = stl->tris; tri < stl->tris+stl->ntris; tri++){
+		p.v[0].p = Pt3((*tri)->p0[0], (*tri)->p0[1], (*tri)->p0[2], 1);
+		p.v[1].p = Pt3((*tri)->p1[0], (*tri)->p1[1], (*tri)->p1[2], 1);
+		p.v[2].p = Pt3((*tri)->p2[0], (*tri)->p2[1], (*tri)->p2[2], 1);
+		p.v[0].n = Vec3((*tri)->n[0], (*tri)->n[1], (*tri)->n[2]);
+		p.v[1].n = p.v[2].n = p.v[0].n;
+
+		m->addprim(m, p);
+	}
+
+	return m->nprims;
+}
+
+static Model *
+readstlmodel(int fd)
+{
+	Model *m;
+	Stl *stl;
+
+	m = newmodel();
+	if((stl = readstl(fd)) == nil)
+		sysfatal("readst: %r");
+	loadstlmodel(m, stl);
+	freestl(stl);
+	return m;
+}
+
+static void
+usage(void)
+{
+	fprint(2, "usage: %s [stlfile]\n", argv0);
+	exits("usage");
+}
+
+void
+main(int argc, char *argv[])
+{
+	Model *m;
+	char *infile;
+	int fd, dedup;
+
+	dedup = 1;
+	infile = "/fd/0";
+	ARGBEGIN{
+	case 'd': dedup--; break;
+	default: usage();
+	}ARGEND;
+	if(argc == 1)
+		infile = argv[0];
+	else if(argc > 1)
+		usage();
+
+	fd = open(infile, OREAD);
+	if(fd < 0)
+		sysfatal("open: %r");
+
+	m = readstlmodel(fd);
+	if(m == nil)
+		sysfatal("sysfatal: %r");
+
+	if(writemodel(1, m, dedup) == 0)
+		sysfatal("writemodel: %r");
+
+	exits(nil);
+}