shithub: 3dee

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adapted to the new libgraphics and its rendering requirements.

--- a/alloc.c

+++ b/alloc.c

@@ -1,6 +1,7 @@

 #include <u.h>

 #include <libc.h>

 #include <draw.h>

+#include <memdraw.h>

 void*

 emalloc(ulong n)

@@ -40,5 +41,17 @@

 	i = allocimage(d, r, chan, repl, col);

 	if(i == nil)

 		sysfatal("allocimage: %r");

+	return i;

+}

+

+Memimage *

+eallocmemimage(Rectangle r, ulong chan)

+{

+	Memimage *i;

+

+	i = allocmemimage(r, chan);

+	if(i == nil)

+		sysfatal("allocmemimage: %r");

+	memfillcolor(i, DTransparent);

 	return i;

 }

--- a/dat.h

+++ b/dat.h

@@ -24,5 +24,6 @@

 	Sfov,

 	Scampos,

 	Scambx, Scamby, Scambz,

+	Sfps,

 	Se

 };

--- a/fns.h

+++ b/fns.h

@@ -1,3 +1,4 @@

 void *emalloc(ulong);

 void *erealloc(void*, ulong);

 Image *eallocimage(Display*, Rectangle, ulong, int, ulong);

+Memimage *eallocmemimage(Rectangle, ulong);

--- a/main.c

+++ b/main.c

@@ -2,11 +2,12 @@

 #include <libc.h>

 #include <thread.h>

 #include <draw.h>

+#include <memdraw.h>

 #include <mouse.h>

 #include <keyboard.h>

 #include <geometry.h>

-#include <graphics.h>

-#include <obj.h>

+#include "libobj/obj.h"

+#include "libgraphics/graphics.h"

 #include "dat.h"

 #include "fns.h"

@@ -37,14 +38,15 @@

  [Kcam3]	= KF|4,

  [Kscrshot]	= KF|12

 };

-

 char stats[Se][256];

-

+Memimage *screenfb;

 Mousectl *mctl;

+Channel *drawc;

 int kdown;

-vlong t0, t;

-double Δt;

-char *mdlpath = "../threedee/mdl/rocket.obj";

+OBJ *model;

+Memimage *modeltex;

+Shader *shader;

+double θ, ω;

 Camera cams[4], *maincam;

 Camcfg camcfgs[4] = {

@@ -51,53 +53,247 @@

 	2,0,-4,1,

 	0,0,0,1,

 	0,1,0,0,

-	90*DEG, 0.1, 100, Ppersp,

+	90*DEG, 0.1, 100, PERSPECTIVE,

 	-2,0,-4,1,

 	0,0,0,1,

 	0,1,0,0,

-	120*DEG, 0.1, 100, Ppersp,

+	120*DEG, 0.1, 100, PERSPECTIVE,

 	-2,0,4,1,

 	0,0,0,1,

 	0,1,0,0,

-	90*DEG, 0.1, 100, Ppersp,

+	90*DEG, 0.1, 100, PERSPECTIVE,

+//	-2,0,4,1,

+//	0,0,0,1,

+//	0,1,0,0,

+//	0, 0.1, 100, ORTHOGRAPHIC,

+

 	2,0,4,1,

 	0,0,0,1,

 	0,1,0,0,

-	120*DEG, 0.1, 100, Ppersp

+	120*DEG, 0.1, 100, PERSPECTIVE

 };

+Point3 center = {0,0,0,1};

+Point3 light = {0,1,1,1};	/* global directional light */

-int

-depthcmp(void *a, void *b)

+static int

+min(int a, int b)

 {

-	Triangle3 *ta, *tb;

-	double za, zb;

+	return a < b? a: b;

+}

-	ta = (Triangle3*)a;

-	tb = (Triangle3*)b;

-	za = (ta->p0.z + ta->p1.z + ta->p2.z)/3;

-	zb = (tb->p0.z + tb->p1.z + tb->p2.z)/3;

-	return zb-za;

+static int

+max(int a, int b)

+{

+	return a > b? a: b;

 }

-void

-drawaxis(void)

+//void

+//drawaxis(void)

+//{

+//	Point3	op = Pt3(0,0,0,1),

+//		px = Pt3(1,0,0,1),

+//		py = Pt3(0,1,0,1),

+//		pz = Pt3(0,0,1,1);

+//

+//	line3(maincam, op, px, 0, Endarrow, display->black);

+//	string3(maincam, px, display->black, font, "x");

+//	line3(maincam, op, py, 0, Endarrow, display->black);

+//	string3(maincam, py, display->black, font, "y");

+//	line3(maincam, op, pz, 0, Endarrow, display->black);

+//	string3(maincam, pz, display->black, font, "z");

+//}

+

+Point3

+vertshader(VSparams *sp)

 {

-	Point3	op = Pt3(0,0,0,1),

-		px = Pt3(1,0,0,1),

-		py = Pt3(0,1,0,1),

-		pz = Pt3(0,0,1,1);

+	*sp->n = qrotate(*sp->n, Vec3(0,1,0), θ+fmod(ω*sp->su->uni_time/1e9, 2*PI));

+	sp->su->var_intensity[sp->idx] = fmax(0, dotvec3(*sp->n, light));

+	*sp->n = world2vcs(maincam, *sp->n);

+	*sp->p = qrotate(*sp->p, Vec3(0,1,0), θ+fmod(ω*sp->su->uni_time/1e9, 2*PI));

+	*sp->p = ndc2viewport(maincam, world2ndc(maincam, *sp->p));

+	return *sp->p;

+}

-	line3(maincam, op, px, 0, Endarrow, display->black);

-	string3(maincam, px, display->black, font, "x");

-	line3(maincam, op, py, 0, Endarrow, display->black);

-	string3(maincam, py, display->black, font, "y");

-	line3(maincam, op, pz, 0, Endarrow, display->black);

-	string3(maincam, pz, display->black, font, "z");

+Memimage *

+gouraudshader(FSparams *sp)

+{

+	double intens;

+

+	intens = dotvec3(Vec3(sp->su->var_intensity[0], sp->su->var_intensity[1], sp->su->var_intensity[2]), sp->bc);

+	sp->cbuf[1] *= intens;

+	sp->cbuf[2] *= intens;

+	sp->cbuf[3] *= intens;

+	memfillcolor(sp->frag, *(ulong*)sp->cbuf);

+

+	return sp->frag;

 }

+Memimage *

+toonshader(FSparams *sp)

+{

+	double intens;

+

+	intens = dotvec3(Vec3(sp->su->var_intensity[0], sp->su->var_intensity[1], sp->su->var_intensity[2]), sp->bc);

+	intens = intens > 0.85? 1: intens > 0.60? 0.80: intens > 0.45? 0.60: intens > 0.30? 0.45: intens > 0.15? 0.30: 0;

+	sp->cbuf[1] = 0;

+	sp->cbuf[2] = 155*intens;

+	sp->cbuf[3] = 255*intens;

+	memfillcolor(sp->frag, *(ulong*)sp->cbuf);

+

+	return sp->frag;

+}

+

+Memimage *

+triangleshader(FSparams *sp)

+{

+	Triangle2 t;

+	Rectangle bbox;

+	Point3 bc;

+	uchar cbuf[4];

+

+	t.p0 = Pt2(240,200,1);

+	t.p1 = Pt2(400,40,1);

+	t.p2 = Pt2(240,40,1);

+

+	bbox = Rect(

+		min(min(t.p0.x, t.p1.x), t.p2.x), min(min(t.p0.y, t.p1.y), t.p2.y),

+		max(max(t.p0.x, t.p1.x), t.p2.x), max(max(t.p0.y, t.p1.y), t.p2.y)

+	);

+	if(!ptinrect(sp->p, bbox))

+		return nil;

+

+	bc = barycoords(t, Pt2(sp->p.x,sp->p.y,1));

+	if(bc.x < 0 || bc.y < 0 || bc.z < 0)

+		return nil;

+

+	cbuf[0] = 0xFF;

+	cbuf[1] = 0xFF*bc.z;

+	cbuf[2] = 0xFF*bc.y;

+	cbuf[3] = 0xFF*bc.x;

+	memfillcolor(sp->frag, *(ulong*)cbuf);

+	return sp->frag;

+}

+

+Memimage *

+circleshader(FSparams *sp)

+{

+	Point2 uv;

+	double r, d;

+	uchar cbuf[4];

+

+	uv = Pt2(sp->p.x,sp->p.y,1);

+	uv.x /= Dx(sp->su->fb->r);

+	uv.y /= Dy(sp->su->fb->r);

+//	r = 0.3;

+	r = 0.3*fabs(sin(sp->su->uni_time/1e9));

+	d = vec2len(subpt2(uv, Vec2(0.5,0.5)));

+

+	if(d > r + r*0.05 || d < r - r*0.05)

+		return nil;

+

+	cbuf[0] = 0xFF;

+	cbuf[1] = 0;

+	cbuf[2] = 0xFF*uv.y;

+	cbuf[3] = 0xFF*uv.x;

+

+	memfillcolor(sp->frag, *(ulong*)cbuf);

+	return sp->frag;

+}

+

+/* some shaping functions from The Book of Shaders, Chapter 5 */

+Memimage *

+sfshader(FSparams *sp)

+{

+	Point2 uv;

+	double y, pct;

+	uchar cbuf[4];

+

+	uv = Pt2(sp->p.x,sp->p.y,1);

+	uv.x /= Dx(sp->su->fb->r);

+	uv.y /= Dy(sp->su->fb->r);

+	uv.y = 1 - uv.y;		/* make [0 0] the bottom-left corner */

+

+//	y = step(0.5, uv.x);

+//	y = pow(uv.x, 5);

+//	y = sin(uv.x);

+	y = sin(uv.x*sp->su->uni_time/1e8)/2.0 + 0.5;

+//	y = smoothstep(0.1, 0.9, uv.x);

+	pct = smoothstep(y-0.02, y, uv.y) - smoothstep(y, y+0.02, uv.y);

+

+	cbuf[0] = 0xFF;

+	cbuf[1] = 0xFF*flerp(y, 0, pct);

+	cbuf[2] = 0xFF*flerp(y, 1, pct);

+	cbuf[3] = 0xFF*flerp(y, 0, pct);

+

+	memfillcolor(sp->frag, *(ulong*)cbuf);

+	return sp->frag;

+}

+

+Memimage *

+boxshader(FSparams *sp)

+{

+	Point2 uv, p;

+	Point2 r;

+	uchar cbuf[4];

+

+	uv = Pt2(sp->p.x,sp->p.y,1);

+	uv.x /= Dx(sp->su->fb->r);

+	uv.y /= Dy(sp->su->fb->r);

+	r = Vec2(0.2,0.4);

+

+	p = Pt2(fabs(uv.x - 0.5), fabs(uv.y - 0.5), 1);

+	p = subpt2(p, r);

+	p.x = fmax(p.x, 0);

+	p.y = fmax(p.y, 0);

+

+	if(vec2len(p) > 0)

+		return nil;

+

+	cbuf[0] = 0xFF;

+	cbuf[1] = 0xFF*smoothstep(0,1,uv.x+uv.y);

+	cbuf[2] = 0xFF*uv.y;

+	cbuf[3] = 0xFF*uv.x;

+

+	memfillcolor(sp->frag, *(ulong*)cbuf);

+	return sp->frag;

+}

+

+Point3

+ivshader(VSparams *sp)

+{

+	return ndc2viewport(maincam, world2ndc(maincam, *sp->p));

+}

+

+Memimage *

+identshader(FSparams *sp)

+{

+	memfillcolor(sp->frag, *(ulong*)sp->cbuf);

+	return sp->frag;

+}

+

+Shader shadertab[] = {

+	{ "triangle", ivshader, triangleshader },

+	{ "circle", ivshader, circleshader },

+	{ "box", ivshader, boxshader },

+	{ "sf", ivshader, sfshader },

+	{ "gouraud", vertshader, gouraudshader },

+	{ "toon", vertshader, toonshader },

+	{ "ident", vertshader, identshader },

+};

+Shader *

+getshader(char *name)

+{

+	int i;

+

+	for(i = 0; i < nelem(shadertab); i++)

+		if(strcmp(shadertab[i].name, name) == 0)

+			return &shadertab[i];

+	return nil;

+}

+

 void

 drawstats(void)

 {

@@ -104,11 +300,12 @@

 	int i;

 	snprint(stats[Scamno], sizeof(stats[Scamno]), "CAM %lld", maincam-cams+1);

-	snprint(stats[Sfov], sizeof(stats[Sfov]), "FOV %g°", maincam->fov);

+	snprint(stats[Sfov], sizeof(stats[Sfov]), "FOV %g°", maincam->fov/DEG);

 	snprint(stats[Scampos], sizeof(stats[Scampos]), "%V", maincam->p);

 	snprint(stats[Scambx], sizeof(stats[Scambx]), "bx %V", maincam->bx);

 	snprint(stats[Scamby], sizeof(stats[Scamby]), "by %V", maincam->by);

 	snprint(stats[Scambz], sizeof(stats[Scambz]), "bz %V", maincam->bz);

+	snprint(stats[Sfps], sizeof(stats[Sfps]), "FPS %.0f/%.0f/%.0f/%.0f", !maincam->stats.max? 0: 1e9/maincam->stats.max, !maincam->stats.avg? 0: 1e9/maincam->stats.avg, !maincam->stats.min? 0: 1e9/maincam->stats.min, !maincam->stats.v? 0: 1e9/maincam->stats.v);

 	for(i = 0; i < Se; i++)

 		string(screen, addpt(screen->r.min, Pt(10,10 + i*font->height)), display->black, ZP, font, stats[i]);

 }

@@ -116,62 +313,12 @@

 void

 redraw(void)

 {

-//	Triangle3 tmp;

-//	static TTriangle3 *vistris;

-//	static int nallocvistri;

-//	Triangle trit;

-//	Point3 n;

-//	u8int c;

-//	int i, nvistri;

-//

-//	nvistri = 0;

-//	if(nallocvistri == 0 && vistris == nil){

-//		nallocvistri = model.ntri/2;

-//		vistris = emalloc(nallocvistri*sizeof(TTriangle3));

-//	}

-//	for(i = 0; i < model.ntri; i++){

-//		/* world to camera */

-//		tmp.p0 = world2vcs(maincam, model.tris[i].p0);

-//		tmp.p1 = world2vcs(maincam, model.tris[i].p1);

-//		tmp.p2 = world2vcs(maincam, model.tris[i].p2);

-//		/* back-face culling */

-//		n = normvec3(crossvec3(subpt3(tmp.p1, tmp.p0), subpt3(tmp.p2, tmp.p0)));

-//		if(dotvec3(n, mulpt3(tmp.p0, -1)) <= 0)

-//			continue;

-//		/* camera to projected ndc */

-//		tmp.p0 = vcs2ndc(maincam, tmp.p0);

-//		tmp.p1 = vcs2ndc(maincam, tmp.p1);

-//		tmp.p2 = vcs2ndc(maincam, tmp.p2);

-//		/* clipping */

-//		/*

-//		 * no clipping for now, the whole triangle is ignored

-//		 * if any of its vertices gets outside the frustum.

-//		 */

-//		if(isclipping(tmp.p0) || isclipping(tmp.p1) || isclipping(tmp.p2))

-//			continue;

-//		if(nvistri >= nallocvistri){

-//			nallocvistri += model.ntri/3;

-//			vistris = erealloc(vistris, nallocvistri*sizeof(TTriangle3));

-//		}

-//		vistris[nvistri] = (TTriangle3)tmp;

-//		c = 0xff*fabs(dotvec3(n, Vec3(0,0,1)));

-//		vistris[nvistri].tx = allocimage(display, Rect(0,0,1,1), screen->chan, 1, c<<24|c<<16|c<<8|0xff);

-//		nvistri++;

-//	}

-//	qsort(vistris, nvistri, sizeof(TTriangle3), depthcmp);

+	memfillcolor(screenfb, DWhite);

+	maincam->vp->fbctl->draw(maincam->vp->fbctl, screenfb);

 	lockdisplay(display);

-	draw(maincam->viewport, maincam->viewport->r, display->white, nil, ZP);

-	drawaxis();

-//	for(i = 0; i < nvistri; i++){

-//		/* ndc to screen */

-//		trit.p0 = toviewport(maincam, vistris[i].p0);

-//		trit.p1 = toviewport(maincam, vistris[i].p1);

-//		trit.p2 = toviewport(maincam, vistris[i].p2);

-//		filltriangle(maincam->viewport, trit, vistris[i].tx, ZP);

-//		triangle(maincam->viewport, trit, 0, display->black, ZP);

-//		freeimage(vistris[i].tx);

-//	}

+	loadimage(screen, rectaddpt(screenfb->r, screen->r.min), byteaddr(screenfb, screenfb->r.min), bytesperline(screenfb->r, screenfb->depth)*Dy(screenfb->r));

+//	drawaxis();

 	drawstats();

 	flushimage(display, 1);

 	unlockdisplay(display);

@@ -178,16 +325,13 @@

 }

 void

-drawproc(void *drawc)

+drawproc(void *)

 {

-	Channel *c;

-

 	threadsetname("drawproc");

-	c = drawc;

 	for(;;){

-		send(c, nil);

-		sleep(MS2FR);

+		shootcamera(maincam, model, modeltex, shader);

+		nbsend(drawc, nil);

 	}

 }

@@ -211,18 +355,12 @@

 void

 mouse(void)

 {

-	if((mctl->buttons & 1) != 0)

-		fprint(2, "%v\n", fromviewport(maincam, mctl->xy));

 	if((mctl->buttons & 8) != 0){

-		maincam->fov -= 5;

-		if(maincam->fov < 1)

-			maincam->fov = 1;

+		maincam->fov = fclamp(maincam->fov - 5*DEG, 1*DEG, 359*DEG);

 		reloadcamera(maincam);

 	}

 	if((mctl->buttons & 16) != 0){

-		maincam->fov += 5;

-		if(maincam->fov > 359)

-			maincam->fov = 359;

+		maincam->fov = fclamp(maincam->fov + 5*DEG, 1*DEG, 359*DEG);

 		reloadcamera(maincam);

 	}

 }

@@ -235,9 +373,11 @@

 	int fd, n;

 	threadsetname("kbdproc");

+

 	if((fd = open("/dev/kbd", OREAD)) < 0)

 		sysfatal("kbdproc: %r");

 	memset(buf, 0, sizeof buf);

+

 	for(;;){

 		if(buf[0] != 0){

 			n = strlen(buf)+1;

@@ -271,6 +411,17 @@

 }

 void

+keyproc(void *c)

+{

+	threadsetname("keyproc");

+

+	for(;;){

+		nbsend(c, nil);

+		sleep(HZ2MS(100));	/* key poll rate */

+	}

+}

+

+void

 handlekeys(void)

 {

 	if(kdown & 1<<K↑)

@@ -316,14 +467,13 @@

 	if(getwindow(display, Refnone) < 0)

 		fprint(2, "can't reattach to window\n");

 	unlockdisplay(display);

-	maincam->viewport = screen;

-	reloadcamera(maincam);

+	nbsend(drawc, nil);

 }

 void

 usage(void)

 {

-	fprint(2, "usage: %s [-l objmdl]\n", argv0);

+	fprint(2, "usage: %s [-t texture] [-s shader] model\n", argv0);

 	exits("usage");

 }

@@ -330,58 +480,82 @@

 void

 threadmain(int argc, char *argv[])

 {

-	OBJ *objmesh;

-	Channel *drawc;

+	Viewport *v;

+	Channel *keyc;

+	char *mdlpath, *texpath, *sname, *p;

 	int i;

 	GEOMfmtinstall();

+	texpath = nil;

+	sname = "gouraud";

 	ARGBEGIN{

+	case 't': texpath = EARGF(usage()); break;

+	case 's': sname = EARGF(usage()); break;

 	default: usage();

-	case 'l':

-		mdlpath = EARGF(usage());

-		break;

 	}ARGEND;

-	if(argc != 0)

+	if(argc != 1)

 		usage();

+	mdlpath = argv[0];

+

+	if((shader = getshader(sname)) == nil)

+		sysfatal("couldn't find %s shader", sname);

+

+	if((model = objparse(mdlpath)) == nil)

+		sysfatal("objparse: %r");

+	if(texpath != nil){

+		if((p = strrchr(texpath, '/')) == nil)

+			p = texpath;

+		p = strchr(p, '.');

+		if(p == nil)

+			sysfatal("unknown image file");

+		if(strcmp(++p, "tga") == 0 && (modeltex = readtga(texpath)) == nil)

+			sysfatal("readtga: %r");

+		else if(strcmp(p, "png") == 0 && (modeltex = readpng(texpath)) == nil)

+			sysfatal("readpng: %r");

+		if(modeltex == nil)

+			sysfatal("unknown image file");

+	}

+

 	if(initdraw(nil, nil, "3d") < 0)

 		sysfatal("initdraw: %r");

+	if(memimageinit() != 0)

+		sysfatal("memimageinit: %r");

 	if((mctl = initmouse(nil, screen)) == nil)

 		sysfatal("initmouse: %r");

+	screenfb = eallocmemimage(rectsubpt(screen->r, screen->r.min), screen->chan);

 	for(i = 0; i < nelem(cams); i++){

+		v = mkviewport(screenfb->r);

 		placecamera(&cams[i], camcfgs[i].p, camcfgs[i].lookat, camcfgs[i].up);

-		configcamera(&cams[i], screen, camcfgs[i].fov, camcfgs[i].clipn, camcfgs[i].clipf, camcfgs[i].ptype);

+		configcamera(&cams[i], v, camcfgs[i].fov, camcfgs[i].clipn, camcfgs[i].clipf, camcfgs[i].ptype);

 	}

 	maincam = &cams[0];

-	if((objmesh = objparse(mdlpath)) == nil)

-		sysfatal("objparse: %r");

+	light = normvec3(subpt3(light, center));

+	keyc = chancreate(sizeof(void*), 1);

+	drawc = chancreate(sizeof(void*), 1);

 	display->locking = 1;

 	unlockdisplay(display);

-	drawc = chancreate(1, 0);

-	proccreate(drawproc, drawc, 1024);

-	proccreate(kbdproc, nil, 4096);

+	proccreate(kbdproc, nil, mainstacksize);

+	proccreate(keyproc, keyc, mainstacksize);

+	proccreate(drawproc, nil, mainstacksize);

-	t0 = nsec();

 	for(;;){

-		enum {MOUSE, RESIZE, DRAW};

+		enum {MOUSE, RESIZE, KEY, DRAW};

 		Alt a[] = {

 			{mctl->c, &mctl->Mouse, CHANRCV},

 			{mctl->resizec, nil, CHANRCV},

+			{keyc, nil, CHANRCV},

 			{drawc, nil, CHANRCV},

-			{nil, nil, CHANNOBLK}

+			{nil, nil, CHANEND}

 		};

 		switch(alt(a)){

 		case MOUSE: mouse(); break;

 		case RESIZE: resize(); break;

+		case KEY: handlekeys(); break;

 		case DRAW: redraw(); break;

 		}

-		t = nsec();

-		Δt = (t-t0)/1e9;

-		handlekeys();

-		t0 = t;

-		sleep(16);

 	}

 }

--- a/mkfile

+++ b/mkfile

@@ -6,25 +6,14 @@

 	alloc.$O\

 	main.$O\

-HFILES=libgeometry/geometry.h\

-	libgraphics/graphics.h\

-	libobj/obj.h\

-	dat.h\

-	fns.h\

+HFILES=dat.h fns.h

 LIB=\

 	libobj/libobj.a$O\

 	libgraphics/libgraphics.a$O\

-	libgeometry/libgeometry.a$O\

-CFLAGS=$CFLAGS -I. -Ilibgeometry -Ilibgraphics -Ilibobj

-

 </sys/src/cmd/mkone

-libgeometry/libgeometry.a$O:

-	cd libgeometry

-	mk install

-

 libgraphics/libgraphics.a$O:

 	cd libgraphics

 	mk install

@@ -33,8 +22,14 @@

 	cd libobj

 	mk install

+pulldeps:VQ:

+	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

+

 clean nuke:V:

 	rm -f *.[$OS] [$OS].out $TARG

-	@{cd libgeometry; mk $target}

 	@{cd libgraphics; mk $target}

 	@{cd libobj; mk $target}

--- a/readme

+++ b/readme

@@ -2,9 +2,9 @@

 You will need:

-• libgeometry

+• libgeometry (ships with 9front)

 • libgraphics

 and

 • libobj

-Place/bind(1) them to the proper directory slot and mk it.

+`mk pulldeps` should take care of everything.