ref: ff88c093d0092176e173e1bf6cbcd96df07f7e0c
parent: e66d1694113d84a93d748ad2522411d57eb682f2
author: rodri <rgl@antares-labs.eu>
date: Sat Aug 24 17:48:35 EDT 2024
med: use an orbiting camera. add a 3d compass.
--- a/med.c
+++ b/med.c
@@ -47,6 +47,14 @@
int ptype;
};
+typedef struct Compass Compass;
+struct Compass
+{+ Camera *cam;
+ Scene *scn;
+};
+Compass compass; /* 3d compass */
+
Rune keys[Ke] = {[K↑] = Kup,
[K↓] = Kdown,
@@ -77,7 +85,6 @@
Shadertab *shader;
QLock scenelk;
Mouse om;
-Quaternion orient = {1,0,0,0};Camera *cam;
Camcfg camcfg = {@@ -87,6 +94,12 @@
40*DEG, 0.01, 10, PERSPECTIVE
};
Point3 center = {0,0,0,1};+RFrame3 ONF3 = { /* default orthonormal rframe */+ 0,0,0,1,
+ 1,0,0,0,
+ 0,1,0,0,
+ 0,0,1,0
+};
LightSource light; /* global point light */
static int doprof;
@@ -206,7 +219,7 @@
}
static void
-addbasis(void)
+addbasis(Scene *s)
{Entity *e;
Model *m;
@@ -214,7 +227,7 @@
m = newmodel();
e = newentity("basis", m);- e->RFrame3 = subject->RFrame3;
+ e->RFrame3 = ONF3;
memset(prims, 0, sizeof prims);
prims[0].type = prims[1].type = prims[2].type = PLine;
@@ -231,9 +244,26 @@
m->addprim(m, prims[1]);
m->addprim(m, prims[2]);
- scene->addent(scene, e);
+ s->addent(s, e);
}
+static void
+setupcompass(Compass *c, Rectangle r, Renderer *rctl)
+{+ static int scale = 3;
+
+ r.max.x = r.min.x + Dx(r)/scale;
+ r.max.y = r.min.y + Dy(r)/scale;
+
+ c->cam = Cam(rectsubpt(r, r.min), rctl, PERSPECTIVE, 30*DEG, 0.1, 10);
+ c->cam->view->p = Pt2(r.min.x,r.min.y,1);
+ c->cam->view->setscale(c->cam->view, scale, scale);
+
+ c->scn = newscene(nil);
+ addbasis(c->scn);
+ placecamera(c->cam, c->scn, camcfg.p, center, Vec3(0,1,0));
+}
+
Point3
gouraudvshader(VSparams *sp)
{@@ -405,7 +435,7 @@
Color
identshader(FSparams *sp)
{- Color tc, c;
+ Color tc;
if(sp->su->entity->mdl->tex != nil && sp->v.uv.w != 0)
tc = sampletexture(sp->su->entity->mdl->tex, sp->v.uv, tsampler);
@@ -414,10 +444,7 @@
else
tc = Pt3(1,1,1,1);
- c = modulapt3(sp->v.c, tc);
- c.a = 1;
-
- return c;
+ return modulapt3(sp->v.c, tc);
}
Shadertab shadertab[] = {@@ -493,6 +520,7 @@
qlock(&scenelk);
shootcamera(cam, shader);
qunlock(&scenelk);
+ shootcamera(compass.cam, getshader("ident"));if(doprof)
fprint(2, "R %llud %llud\nE %llud %llud\nT %llud %llud\nr %llud %llud\n\n",
cam->times.R[cam->times.cur-1].t0, cam->times.R[cam->times.cur-1].t1,
@@ -503,6 +531,7 @@
if(Δt > HZ2MS(60)*1000000ULL){lockdisplay(display);
cam->view->draw(cam->view, screenb);
+ compass.cam->view->draw(compass.cam->view, screenb);
unlockdisplay(display);
nbsend(drawc, nil);
t0 += Δt;
@@ -524,19 +553,28 @@
void
lmb(void)
{+ static Quaternion orient = {1,0,0,0};Quaternion Δorient;
- Entity *e;
+ Point3 p;
if((om.buttons^mctl->buttons) == 0){Δorient = orient;
qball(screen->r, om.xy, mctl->xy, &orient, nil);
- Δorient = mulq(orient, invq(Δorient));
+ Δorient = mulq(Δorient, invq(orient));
- 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))));
- }
+ /* orbit camera around the center */
+ p = subpt3(cam->p, center);
+ p = vcs2world(cam, Vecquat(mulq(mulq(Δorient, Quatvec(0, world2vcs(cam, p))), invq(Δorient))));
+ p.w = cam->p.w;
+ movecamera(cam, p);
+ aimcamera(cam, center);
+
+ /* same for the compass */
+ p = subpt3(compass.cam->p, center);
+ p = vcs2world(compass.cam, Vecquat(mulq(mulq(Δorient, Quatvec(0, world2vcs(compass.cam, p))), invq(Δorient))));
+ p.w = compass.cam->p.w;
+ movecamera(compass.cam, p);
+ aimcamera(compass.cam, center);
}
}
@@ -707,18 +745,36 @@
movecamera(cam, mulpt3(cam->by, 0.1));
if(kdown & 1<<Kfall)
movecamera(cam, mulpt3(cam->by, -0.1));
- if(kdown & 1<<KR↑)
+ if(kdown & 1<<KR↑){rotatecamera(cam, cam->bx, 1*DEG);
- if(kdown & 1<<KR↓)
+ movecamera(compass.cam, qrotate(compass.cam->p, compass.cam->bx, 1*DEG));
+ rotatecamera(compass.cam, compass.cam->bx, 1*DEG);
+ }
+ if(kdown & 1<<KR↓){rotatecamera(cam, cam->bx, -1*DEG);
- if(kdown & 1<<KR←)
+ movecamera(compass.cam, qrotate(compass.cam->p, compass.cam->bx, -1*DEG));
+ rotatecamera(compass.cam, compass.cam->bx, -1*DEG);
+ }
+ if(kdown & 1<<KR←){rotatecamera(cam, cam->by, 1*DEG);
- if(kdown & 1<<KR→)
+ movecamera(compass.cam, qrotate(compass.cam->p, compass.cam->by, 1*DEG));
+ rotatecamera(compass.cam, compass.cam->by, 1*DEG);
+ }
+ if(kdown & 1<<KR→){rotatecamera(cam, cam->by, -1*DEG);
- if(kdown & 1<<KR↺)
+ movecamera(compass.cam, qrotate(compass.cam->p, compass.cam->by, -1*DEG));
+ rotatecamera(compass.cam, compass.cam->by, -1*DEG);
+ }
+ if(kdown & 1<<KR↺){rotatecamera(cam, cam->bz, 1*DEG);
- if(kdown & 1<<KR↻)
+ movecamera(compass.cam, qrotate(compass.cam->p, compass.cam->bz, 1*DEG));
+ rotatecamera(compass.cam, compass.cam->bz, 1*DEG);
+ }
+ if(kdown & 1<<KR↻){rotatecamera(cam, cam->bz, -1*DEG);
+ movecamera(compass.cam, qrotate(compass.cam->p, compass.cam->bz, -1*DEG));
+ rotatecamera(compass.cam, compass.cam->bz, -1*DEG);
+ }
if(kdown & 1<<Kzoomin)
zoomin();
if(kdown & 1<<Kzoomout)
@@ -790,7 +846,6 @@
model = newmodel();
subject = newentity("main", model);scene->addent(scene, subject);
- addbasis();
if(memimageinit() != 0)
sysfatal("memimageinit: %r");@@ -808,6 +863,8 @@
light.c = Pt3(1,1,1,1);
light.type = LightPoint;
tsampler = neartexsampler;
+
+ setupcompass(&compass, rectaddpt(Rect(0,0,100,100), subpt(screenb->r.max, Pt(100,100))), rctl);
kctl = emalloc(sizeof *kctl);
kctl->c = chancreate(sizeof(Rune), 16);
--- a/vis.c
+++ b/vis.c
@@ -656,8 +656,8 @@
void
lmb(void)
{- Entity *e;
Quaternion Δorient;
+ Entity *e;
if((om.buttons^mctl->buttons) == 0){Δorient = orient;