diff options
| -rw-r--r-- | main.c | 100 |
1 files changed, 87 insertions, 13 deletions
@@ -72,7 +72,8 @@ Camcfg camcfgs[4] = { 80*DEG, 0.01, 100, PERSPECTIVE }; Point3 center = {0,0,0,1}; -Point3 light = {0,1,1,1}; /* global point light */ +LightSource light; /* global point light */ +Point3 lightdir; static int doprof; static int inception; @@ -110,7 +111,7 @@ Point3 vertshader(VSparams *sp) { sp->v->n = qrotate(sp->v->n, Vec3(0,1,0), θ+fmod(ω*sp->su->uni_time/1e9, 2*PI)); - sp->v->intensity = fmax(0, dotvec3(sp->v->n, light)); + sp->v->intensity = fmax(0, dotvec3(sp->v->n, lightdir)); sp->v->p = qrotate(sp->v->p, Vec3(0,1,0), θ+fmod(ω*sp->su->uni_time/1e9, 2*PI)); return world2clip(maincam, model2world(sp->su->entity, sp->v->p)); } @@ -118,12 +119,47 @@ vertshader(VSparams *sp) Memimage * gouraudshader(FSparams *sp) { - double intens; + sp->cbuf[1] *= sp->su->var_intensity; + sp->cbuf[2] *= sp->su->var_intensity; + sp->cbuf[3] *= sp->su->var_intensity; + memfillcolor(sp->frag, *(ulong*)sp->cbuf); + + return sp->frag; +} + +Point3 +phongvshader(VSparams *sp) +{ + sp->v->n = qrotate(sp->v->n, Vec3(0,1,0), θ+fmod(ω*sp->su->uni_time/1e9, 2*PI)); + sp->v->p = qrotate(sp->v->p, Vec3(0,1,0), θ+fmod(ω*sp->su->uni_time/1e9, 2*PI)); + sp->v->pos = model2world(sp->su->entity, sp->v->p); + return world2clip(maincam, model2world(sp->su->entity, sp->v->p)); +} - 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; +Memimage * +phongshader(FSparams *sp) +{ + static double Ka = 0.1; /* ambient factor */ + static double Ks = 0.5; /* specular factor */ + double Kd; /* diffuse factor */ + double spec; + Color ambient, diffuse, specular; + Point3 lookdir, lightdir₂; + + ambient = mulpt3(light.c, Ka); + + lightdir₂ = normvec3(subpt3(light.p, sp->su->var_pos)); + Kd = fmax(0, dotvec3(sp->su->var_normal, lightdir₂)); + diffuse = mulpt3(light.c, Kd); + + lookdir = normvec3(subpt3(maincam->p, sp->su->var_pos)); + lightdir₂ = qrotate(lightdir₂, sp->su->var_normal, PI); + spec = pow(fmax(0, dotvec3(lookdir, lightdir₂)), 64); + specular = mulpt3(light.c, spec*Ks); + + sp->cbuf[1] *= fclamp(ambient.b + diffuse.b + specular.b, 0, 1); + sp->cbuf[2] *= fclamp(ambient.g + diffuse.g + specular.g, 0, 1); + sp->cbuf[3] *= fclamp(ambient.r + diffuse.r + specular.r, 0, 1); memfillcolor(sp->frag, *(ulong*)sp->cbuf); return sp->frag; @@ -134,7 +170,7 @@ 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 = sp->su->var_intensity; 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; @@ -262,7 +298,7 @@ boxshader(FSparams *sp) Point3 ivshader(VSparams *sp) { - return world2clip(maincam, sp->v->p); + return world2clip(maincam, model2world(sp->su->entity, sp->v->p)); } Memimage * @@ -277,6 +313,7 @@ Shader shadertab[] = { { "circle", ivshader, circleshader }, { "box", ivshader, boxshader }, { "sf", ivshader, sfshader }, + { "phong", phongvshader, phongshader }, { "gouraud", vertshader, gouraudshader }, { "toon", vertshader, toonshader }, { "ident", vertshader, identshader }, @@ -354,13 +391,37 @@ drawproc(void *) if((model->tex = readmemimage(fd)) == nil) sysfatal("readmemimage: %r"); } + light.p = qrotate(light.p, Vec3(0,1,0), θ+fmod(ω*Δt/1e9, 2*PI)); } } } +static char * +genrmbmenuitem(int idx) +{ + if(idx < nelem(shadertab)) + return shadertab[idx].name; + return nil; +} + +void +rmb(void) +{ + static Menu menu = { .gen = genrmbmenuitem }; + int idx; + + idx = menuhit(3, mctl, &menu, _screen); + if(idx < 0) + return; + shader = &shadertab[idx]; + nbsendp(drawc, nil); +} + void mouse(void) { + if((mctl->buttons & 4) != 0) + rmb(); if((mctl->buttons & 8) != 0){ maincam->fov = fclamp(maincam->fov - 1*DEG, 1*DEG, 359*DEG); reloadcamera(maincam); @@ -504,7 +565,7 @@ confproc(void) void usage(void) { - fprint(2, "usage: %s [-t texture] [-s shader] [-ω yrot] model...\n", argv0); + fprint(2, "usage: %s [-t texture] [-n normals] [-s shader] [-ω yrot] model...\n", argv0); exits("usage"); } @@ -513,17 +574,19 @@ threadmain(int argc, char *argv[]) { Viewport *v; Channel *keyc; - char *mdlpath, *texpath, *sname; + char *texpath, *norpath, *sname, *mdlpath; int i, fd; GEOMfmtinstall(); texpath = nil; + norpath = nil; sname = "gouraud"; ARGBEGIN{ case 't': texpath = EARGF(usage()); break; + case 'n': norpath = EARGF(usage()); break; case 's': sname = EARGF(usage()); break; case L'ω': ω = strtod(EARGF(usage()), nil)*DEG; break; - case L'σ': inception++; break; + case L'ι': inception++; break; case 'p': doprof++; break; default: usage(); }ARGEND; @@ -553,6 +616,14 @@ threadmain(int argc, char *argv[]) sysfatal("readmemimage: %r"); close(fd); } + if(argc == 0 && norpath != nil){ + fd = open(norpath, OREAD); + if(fd < 0) + sysfatal("open: %r"); + if((model->nor = readmemimage(fd)) == nil) + sysfatal("readmemimage: %r"); + close(fd); + } refreshmodel(model); } @@ -571,7 +642,10 @@ threadmain(int argc, char *argv[]) cams[i].s = scene; } maincam = &cams[0]; - light = normvec3(subpt3(light, center)); + light.p = Pt3(0,100,100,1); + light.c = Pt3(1,1,1,1); + light.type = LIGHT_POINT; + lightdir = normvec3(subpt3(light.p, center)); keyc = chancreate(sizeof(void*), 1); drawc = chancreate(sizeof(void*), 1); |