diff options
Diffstat (limited to 'med.c')
| -rw-r--r-- | med.c | 47 |
1 files changed, 41 insertions, 6 deletions
@@ -179,6 +179,7 @@ addcube(void) memset(t, 0, sizeof t); t[0].type = t[1].type = PTriangle; + /* build the first face/quad, facing the positive z axis */ p = Vec3(-0.5,-0.5,0.5); v1 = Vec3(1,0,0); v2 = Vec3(0,1,0); @@ -193,10 +194,11 @@ addcube(void) t[1].v[2].p = addpt3(center, addpt3(p, v2)); t[1].v[2].n = addpt3(p, v2); + /* make a cube by rotating the reference face */ for(i = 0; i < 6; i++){ - for(j = 0; j < 2; j++) - for(k = 0; k < 3; k++) - if(i > 0){ + if(i > 0) + for(j = 0; j < 2; j++) + for(k = 0; k < 3; k++){ t[j].v[k].p = qrotate(t[j].v[k].p, axis[i%3], PI/2); t[j].v[k].n = qrotate(t[j].v[k].n, axis[i%3], PI/2); } @@ -209,6 +211,34 @@ addcube(void) } } +static void +addbasis(void) +{ + Entity *e; + Model *m; + Primitive prims[3]; + + m = newmodel(); + e = newentity(m); + e->RFrame3 = subject->RFrame3; + + memset(prims, 0, sizeof prims); + prims[0].type = prims[1].type = prims[2].type = PLine; + prims[0].v[0].p = prims[1].v[0].p = prims[2].v[0].p = center; + prims[0].v[0].c = prims[1].v[0].c = prims[2].v[0].c = Pt3(0,0,0,1); + prims[0].v[1].p = addpt3(center, e->bx); + prims[0].v[1].c = Pt3(1,0,0,1); + prims[1].v[1].p = addpt3(center, e->by); + prims[1].v[1].c = Pt3(0,1,0,1); + prims[2].v[1].p = addpt3(center, e->bz); + prims[2].v[1].c = Pt3(0,0,1,1); + + m->prims = erealloc(m->prims, (m->nprims += 3)*sizeof(*m->prims)); + memmove(m->prims, prims, sizeof prims); + + scene->addent(scene, e); +} + Point3 gouraudvshader(VSparams *sp) { @@ -496,14 +526,18 @@ void lmb(void) { Quaternion Δorient; + Entity *e; if((om.buttons^mctl->buttons) == 0){ Δorient = orient; qball(screen->r, om.xy, mctl->xy, &orient, nil); Δorient = mulq(orient, invq(Δorient)); - subject->bx = Vecquat(mulq(mulq(Δorient, Quatvec(0, subject->bx)), invq(Δorient))); - subject->by = Vecquat(mulq(mulq(Δorient, Quatvec(0, subject->by)), invq(Δorient))); - subject->bz = Vecquat(mulq(mulq(Δorient, Quatvec(0, subject->bz)), invq(Δorient))); + + for(e = scene->ents.next; e != &scene->ents; e = e->next){ + e->bx = vcs2world(&cam, Vecquat(mulq(mulq(Δorient, Quatvec(0, world2vcs(&cam, e->bx))), invq(Δorient)))); + e->by = vcs2world(&cam, Vecquat(mulq(mulq(Δorient, Quatvec(0, world2vcs(&cam, e->by))), invq(Δorient)))); + e->bz = vcs2world(&cam, Vecquat(mulq(mulq(Δorient, Quatvec(0, world2vcs(&cam, e->bz))), invq(Δorient)))); + } } } @@ -758,6 +792,7 @@ threadmain(int argc, char *argv[]) model = newmodel(); subject = newentity(model); scene->addent(scene, subject); + addbasis(); if(memimageinit() != 0) sysfatal("memimageinit: %r"); |