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hyperrogue/rug.cpp
Zeno Rogue 86f1a4dead More porting.
2018-01-05 19:05:41 +01:00

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// Hyperbolic Rogue
// Copyright (C) 2011-2016 Zeno Rogue, see 'hyper.cpp' for details
// implementation of the Hypersian Rug mode
#if CAP_RUG
#define TEXTURESIZE (texturesize)
#define HTEXTURESIZE (texturesize/2)
#if !CAP_GLEW
#if ISLINUX
extern "C" {
GLAPI void APIENTRY glGenFramebuffers (GLsizei n, GLuint *framebuffers);
GLAPI void APIENTRY glBindFramebuffer (GLenum target, GLuint framebuffer);
GLAPI void APIENTRY glFramebufferTexture (GLenum target, GLenum attachment, GLuint texture, GLint level);
GLAPI GLenum APIENTRY glCheckFramebufferStatus (GLenum target);
GLAPI void APIENTRY glDrawBuffers (GLsizei n, const GLenum *bufs);
GLAPI void APIENTRY glGenRenderbuffers (GLsizei n, GLuint *renderbuffers);
GLAPI void APIENTRY glBindRenderbuffer (GLenum target, GLuint renderbuffer);
GLAPI void APIENTRY glRenderbufferStorage (GLenum target, GLenum internalformat, GLsizei width, GLsizei height);
GLAPI void APIENTRY glFramebufferRenderbuffer (GLenum target, GLenum attachment, GLenum renderbuffertarget, GLuint renderbuffer);
GLAPI void APIENTRY glDeleteRenderbuffers (GLsizei n, const GLuint *renderbuffers);
GLAPI void APIENTRY glDeleteFramebuffers (GLsizei n, const GLuint *framebuffers);
}
#endif
#if ISMAC
#define glFramebufferTexture glFramebufferTextureEXT
#endif
#endif
namespace rug {
struct rug_exception { };
bool fast_euclidean = true;
bool keep_shape = true;
bool good_shape;
ld modelscale = 1;
ld model_distance = 2;
ld fov = 90;
eGeometry gwhere = gEuclid;
#define USING_NATIVE_GEOMETRY dynamicval<eGeometry> gw(geometry, gwhere == gElliptic ? gSphere : gwhere)
// hypersian rug datatypes and globals
//-------------------------------------
bool rugged = false;
bool genrug = false;
bool glew = false;
int vertex_limit = 20000;
bool renderonce = false;
bool rendernogl = false;
int texturesize = 1024;
ld scale = 1;
ld err_zero = 1e-3, err_zero_current, current_total_error;
int queueiter, qvalid, dt;
struct edge {
struct rugpoint *target;
double len;
};
struct rugpoint {
double x1, y1;
bool valid;
bool inqueue;
double dist;
hyperpoint h;
hyperpoint flat;
vector<edge> edges;
// Find-Union algorithm
rugpoint *glue;
rugpoint *getglue() {
return glue ? (glue = glue->getglue()) : this;
}
hyperpoint& glueflat() {
return glue->flat;
}
rugpoint() { glue = NULL; }
void glueto(rugpoint *x) {
x = x->getglue();
auto y = getglue();
if(x != y) y->glue = x;
}
};
struct triangle {
rugpoint *m[3];
triangle(rugpoint *m1, rugpoint *m2, rugpoint *m3) {
m[0] = m1; m[1] = m2; m[2] = m3;
}
};
vector<rugpoint*> points;
vector<triangle> triangles;
bool rug_perspective = false;
// extra geometry functions
//--------------------------
// returns a matrix M
// such that inverse(M) * h1 = ( |h1|, 0, 0) and inverse(M) * h2 = ( .., .., 0)
transmatrix orthonormalize(hyperpoint h1, hyperpoint h2) {
using namespace hyperpoint_vec;
hyperpoint vec[3] = {h1, h2, h1 ^ h2};
for(int i=0; i<3; i++) {
for(int j=0; j<i; j++) vec[i] -= vec[j] * (vec[i] | vec[j]);
if(zero3(vec[i])) {
// 'random' direction
vec[i] = hpxyz(1.12, 1.512+i, 1.12904+i);
for(int j=0; j<i; j++) vec[i] -= vec[j] * (vec[i] | vec[j]);
}
vec[i] /= hypot3(vec[i]);
}
transmatrix M;
for(int i=0; i<3; i++) for(int j=0; j<3; j++)
M[i][j] = vec[j][i];
return M;
}
hyperpoint azeq_to_hyperboloid(hyperpoint h) {
if(abs(h[2])>1e-4) printf("Error: h[2] = %lf\n", h[2]);
if(euclid) {
h[2] = 1;
return h;
}
ld d = hypot(h[0], h[1]);
if(d == 0) {
h[2] = 1;
return h;
}
if(sphere) {
ld d0 = d ? d : 1;
h[0] = sin(d) * h[0]/d0;
h[1] = sin(d) * h[1]/d0;
h[2] = cos(d);
}
else {
ld d0 = d ? d : 1;
h[0] = sinh(d) * h[0]/d0;
h[1] = sinh(d) * h[1]/d0;
h[2] = cosh(d);
}
return h;
}
hyperpoint hyperboloid_to_azeq(hyperpoint h) {
if(euclid) {
h[2] = 0;
return h;
}
else {
ld d = hdist0(h);
if(d == 0) { h[2] = 0; return h; }
ld d2 = hypot2(h);
if(d2 == 0) { h[2] = 0; return h; }
h[0] = d * h[0] / d2;
h[1] = d * h[1] / d2;
h[2] = 0;
return h;
}
}
struct normalizer {
transmatrix M, Mi;
dynamicval<eGeometry> gw;
normalizer (hyperpoint h1, hyperpoint h2) : gw(geometry, gwhere == gElliptic ? gSphere : gwhere) {
M = orthonormalize(h1, h2);
Mi = inverse(M);
}
hyperpoint operator() (hyperpoint h) { return azeq_to_hyperboloid(Mi*h); }
hyperpoint operator[] (hyperpoint h) { return M*hyperboloid_to_azeq(h); }
};
void push_point(hyperpoint& h, int coord, ld val) {
if(fast_euclidean && gwhere == gEuclid)
h[coord] += val;
else if(!val) return;
else {
// if(zero3(h)) { h[0] = 1e-9; h[1] = 1e-10; h[2] = 1e-11; }
normalizer n(hpxyz(coord==0,coord==1,coord==2), h);
hyperpoint f = n(h);
h = n[xpush(val) * f];
}
}
void push_all_points(int coord, ld val) {
if(!val) return;
else for(int i=0; i<size(points); i++)
push_point(points[i]->flat, coord, val);
}
// construct the graph
//---------------------
int hyprand;
rugpoint *addRugpoint(hyperpoint h, double dist) {
rugpoint *m = new rugpoint;
m->h = h;
/*
ld tz = vid.alphax+h[2];
m->x1 = (1 + h[0] / tz) / 2;
m->y1 = (1 + h[1] / tz) / 2;
*/
hyperpoint onscreen;
applymodel(m->h, onscreen);
m->x1 = (1 + onscreen[0] * vid.scale) / 2;
m->y1 = (1 + onscreen[1] * vid.scale) / 2;
m->valid = false;
using namespace hyperpoint_vec;
if(sphere) {
m->valid = good_shape = true;
ld scale;
if(gwhere == gEuclid) {
scale = modelscale;
}
else if(gwhere == gNormal) {
// sinh(scale) = modelscale
scale = asinh(modelscale);
}
else /* sphere/elliptic*/ {
if(modelscale >= 1)
// do as good as we can...
scale = M_PI / 2 - 1e-3, good_shape = false;
else scale = asin(modelscale);
}
m->flat = h * scale;
}
else if(euclid && gwhere == gEuclid) {
m->flat = h * modelscale;
}
else if(gwhere == gNormal && (euclid || (hyperbolic && modelscale >= 1))) {
m->valid = good_shape = true;
ld d = hdist0(h);
ld d0 = hypot2(h); if(!d0) d0 = 1;
hyperpoint hpoint;
bool orig_euclid = euclid;
USING_NATIVE_GEOMETRY;
if(orig_euclid) {
d *= modelscale;
// point on a horocycle going through C0, in distance d along the horocycle
hpoint = hpxy(d*d/2, d);
}
else {
// radius of the equidistant
ld r = acosh(modelscale);
// point on an equdistant going through C0 in distance d along the guiding line
// hpoint = hpxy(cosh(r) * sinh(r) * (cosh(d) - 1), sinh(d) * cosh(r));
hpoint = xpush(r) * ypush(d) * xpush(-r) * C0;
hpoint[0] = -hpoint[0];
}
ld hpdist = hdist0(hpoint);
ld z = hypot2(hpoint);
if(z==0) z = 1;
m->flat = hpxyz(hpdist * h[0]/d0 * hpoint[1] / z, hpdist * h[1]/d0 * hpoint[1] / z, -hpdist * hpoint[0] / z);
}
else m->flat = // hpxyz(h[0], h[1], sin(atan2(h[0], h[1]) * 3 + hyprand) * (h[2]-1) / 1000);
hpxyz(h[0], h[1], (h[2] - .99) * (rand() % 1000 - rand() % 1000) / 1000);
if(rug_perspective)
push_point(m->flat, 2, -model_distance);
// if(rug_perspective && gwhere == gEuclid) m->flat[2] -= 3;
m->inqueue = false;
m->dist = dist;
points.push_back(m);
return m;
}
rugpoint *findRugpoint(hyperpoint h) {
for(int i=0; i<size(points); i++)
if(intvalxyz(points[i]->h, h) < 1e-5) return points[i];
return NULL;
}
rugpoint *findOrAddRugpoint(hyperpoint h, double dist) {
rugpoint *r = findRugpoint(h);
return r ? r : addRugpoint(h, dist);
}
void addNewEdge(rugpoint *e1, rugpoint *e2, ld len = 1) {
edge e; e.len = len;
e.target = e2; e1->edges.push_back(e);
e.target = e1; e2->edges.push_back(e);
}
void addEdge(rugpoint *e1, rugpoint *e2, ld len = 1) {
for(int i=0; i<size(e1->edges); i++)
if(e1->edges[i].target == e2) return;
addNewEdge(e1, e2, len);
}
void addTriangle(rugpoint *t1, rugpoint *t2, rugpoint *t3, ld len = 1) {
addEdge(t1->getglue(), t2->getglue(), len);
addEdge(t2->getglue(), t3->getglue(), len);
addEdge(t3->getglue(), t1->getglue(), len);
triangles.push_back(triangle(t1,t2,t3));
}
map<pair<rugpoint*, rugpoint*>, rugpoint*> halves;
rugpoint* findhalf(rugpoint *r1, rugpoint *r2) {
if(r1 > r2) swap(r1, r2);
return halves[make_pair(r1,r2)];
}
void addTriangle1(rugpoint *t1, rugpoint *t2, rugpoint *t3) {
rugpoint *t12 = findhalf(t1, t2);
rugpoint *t23 = findhalf(t2, t3);
rugpoint *t31 = findhalf(t3, t1);
addTriangle(t1, t12, t31);
addTriangle(t12, t2, t23);
addTriangle(t23, t3, t31);
addTriangle(t23, t31, t12);
}
bool psort(rugpoint *a, rugpoint *b) {
return hdist0(a->h) < hdist0(b->h);
}
void calcLengths() {
for(int i=0; i<size(points); i++) for(int j=0; j<size(points[i]->edges); j++) {
ld d = hdist(points[i]->h, points[i]->edges[j].target->h);
if(elliptic && d > M_PI/2) d = M_PI - d;
points[i]->edges[j].len = d * modelscale;
}
}
void setVidParam() {
vid.xres = vid.yres = TEXTURESIZE;
vid.scrsize = HTEXTURESIZE;
vid.radius = vid.scrsize * vid.scale; vid.xcenter = HTEXTURESIZE; vid.ycenter = HTEXTURESIZE;
vid.beta = 2; vid.alphax = 1; vid.eye = 0; vid.goteyes = false;
}
void buildTorusRug() {
using namespace torusconfig;
setVidParam();
struct toruspoint {
int x,y;
toruspoint() { x=y=getqty(); }
toruspoint(int _x, int _y) : x(_x), y(_y) {}
int d2() {
return x*x+(euclid6?x*y:0)+y*y;
}
};
vector<toruspoint> zeropoints;
vector<toruspoint> tps(qty);
auto& mode = tmodes[torus_mode];
bool single = mode.flags & TF_SINGLE;
bool klein = mode.flags & TF_KLEIN;
pair<toruspoint, toruspoint> solution;
if(single) {
for(int ax=-qty; ax<qty; ax++)
for(int ay=-qty; ay<qty; ay++) {
int v = (ax*dx + ay*dy) % qty;
if(v<0) v += qty;
toruspoint tp(ax, ay);
if(tps[v].d2() > tp.d2()) tps[v] = tp;
if(v == 0)
zeropoints.emplace_back(ax, ay);
}
ld bestsol = 1e12;
for(auto p1: zeropoints)
for(auto p2: zeropoints) {
int det = p1.x * p2.y - p2.x * p1.y;
if(det < 0) continue;
if(det != qty && det != -qty) continue;
ld quality = ld(p1.d2()) * p2.d2();
if(quality < bestsol * 3)
if(quality < bestsol)
bestsol = quality, solution.first = p1, solution.second = p2;
}
if(solution.first.d2() > solution.second.d2())
swap(solution.first, solution.second);
}
else {
if(klein)
solution.first = toruspoint(2*sdx, 0);
else
solution.first = toruspoint(sdx, 0);
if(mode.flags & TF_WEIRD)
solution.second = toruspoint(sdy/2, sdy);
else
solution.second = toruspoint(0, sdy);
if(solution.first.d2() > solution.second.d2())
swap(solution.first, solution.second);
}
ld factor = sqrt(ld(solution.second.d2()) / solution.first.d2());
printf("factor = %lf\n", factor);
if(factor <= 2.05) factor = 2.2;
factor -= 1;
// 22,1
// 7,-17
// transmatrix z1 = {{{22,7,0}, {1,-17,0}, {0,0,1}}};
transmatrix z1 = {{{(ld)solution.first.x,(ld)solution.second.x,0}, {(ld)solution.first.y,(ld)solution.second.y,0}, {0,0,1}}};
transmatrix z2 = inverse(z1);
map<pair<int, int>, rugpoint*> glues;
auto addToruspoint = [&] (ld x, ld y) {
auto r = addRugpoint(C0, 0);
hyperpoint onscreen;
applymodel(tC0(eumove(x, y)), onscreen);
// take point (1,0)
// apply eumove(1,0)
// divide by EUCSCALE
// multiply by vid.radius (= HTEXTURESIZE * rugzoom)
// add 1, divide by texturesize
r->x1 = onscreen[0];
r->y1 = onscreen[1];
// r->y1 = (1 + onscreen[1] * rugzoom / EUCSCALE)/2;
hyperpoint h1 = hpxyz(x, y, 0);
hyperpoint h2 = z2 * h1;
double alpha = -h2[0] * 2 * M_PI;
double beta = -h2[1] * 2 * M_PI;
// r->flat = {alpha, beta, 0};
double sc = (factor+1)/4;
r->flat = r->h = hpxyz((factor+cos(alpha)) * cos(beta) * sc, (factor+cos(alpha)) * sin(beta) * sc, -sin(alpha) * sc);
r->valid = true;
static const int X = 100003; // a prime
auto gluefun = [] (ld z) { return int(frac(z + .5/X) * X); };
auto p = make_pair(gluefun(h2[0]), gluefun(h2[1]));
auto& r2 = glues[p];
if(r2) r->glueto(r2); else r2 = r;
return r;
};
int rugmax = (int) sqrt(vertex_limit / qty);
if(rugmax < 1) rugmax = 1;
if(rugmax > 16) rugmax = 16;
ld rmd = rugmax;
for(int leaf=0; leaf<(klein ? 2 : 1); leaf++)
for(int i=0; i<getqty(); i++) {
int x, y;
if(single) {
x = tps[i].x;
y = tps[i].y;
}
else {
x = i % sdx;
y = i / sdx;
if(x > sdx/2) x -= sdx;
if(y > sdy/2) y -= sdy;
if(leaf) {
x += sdx;
if(x > sdx) x -= 2 * sdx;
}
}
rugpoint *rugarr[32][32];
for(int yy=0; yy<=rugmax; yy++)
for(int xx=0; xx<=rugmax; xx++)
rugarr[yy][xx] = addToruspoint(x+xx/rmd, y+(yy-xx)/rmd);
for(int yy=0; yy<rugmax; yy++)
for(int xx=0; xx<rugmax; xx++)
addTriangle(rugarr[yy][xx], rugarr[yy+1][xx], rugarr[yy+1][xx+1], modelscale/rugmax),
addTriangle(rugarr[yy][xx], rugarr[yy][xx+1], rugarr[yy+1][xx+1], modelscale/rugmax);
}
double maxz = 0;
for(auto p: points)
maxz = max(maxz, max(abs(p->x1), abs(p->y1)));
// maxz * rugzoom * vid.radius == vid.radius
vid.scale = 1 / maxz;
for(auto p: points)
p->x1 = (vid.xcenter + vid.radius * vid.scale * p->x1)/ vid.xres,
p->y1 = (vid.ycenter - vid.radius * vid.scale * p->y1)/ vid.yres;
qvalid = 0;
for(auto p: points) if(!p->glue) qvalid++;
printf("qvalid = %d\n", qvalid);
if(rug_perspective)
push_all_points(2, -model_distance);
return;
}
void verify() {
vector<ld> ratios;
for(auto m: points)
for(auto& e: m->edges) {
auto m2 = e.target;
ld l = e.len;
normalizer n(m->flat, m2->flat);
hyperpoint h1 = n(m->flat);
hyperpoint h2 = n(m2->flat);
ld l0 = hdist(h1, h2);
ratios.push_back(l0 / l);
}
printf("Length verification:\n");
sort(ratios.begin(), ratios.end());
for(int i=0; i<size(ratios); i += size(ratios) / 10)
printf("%lf\n", ratios[i]);
printf("\n");
}
void comp(cell*& minimum, cell *next) {
int nc = next->cpdist, mc = minimum->cpdist;
if(tie(nc, next) < tie(mc, minimum))
minimum = next;
}
void buildRug() {
if(torus) {
good_shape = true;
buildTorusRug();
return;
}
celllister cl(centerover.c ? centerover.c : cwt.c, sightrange, vertex_limit, NULL);
map<cell*, rugpoint *> vptr;
for(cell *c: cl.lst)
vptr[c] = addRugpoint(shmup::ggmatrix(c)*C0, c->cpdist);
for(auto& p: vptr) {
cell *c = p.first;
rugpoint *v = p.second;
for(int j=0; j<c->type; j++) try {
cell *c2 = c->mov[j];
rugpoint *w = vptr.at(c2);
// if(v<w) addEdge(v, w);
cell *c3 = c->mov[(j+1) % c->type];
rugpoint *w2 = vptr.at(c3);
if(a4) {
cellwalker cw(c, j);
cwstep(cw); cwspin(cw, -1); cwstep(cw);
cell *c4 = cw.c;
cell *cm = c; comp(cm, c); comp(cm, c2); comp(cm, c3); comp(cm, c4);
if(cm == c || cm == c4)
addTriangle(v, w, w2);
}
else if(v > w && v > w2)
addTriangle(v, w, w2);
}
catch(out_of_range) {}
}
printf("vertices = %d triangles= %d\n", size(points), size(triangles));
calcLengths();
sort(points.begin(), points.end(), psort);
verify();
}
// rug physics
queue<rugpoint*> pqueue;
void enqueue(rugpoint *m) {
if(m->inqueue) return;
pqueue.push(m);
m->inqueue = true;
}
bool force_euclidean(rugpoint& m1, rugpoint& m2, double rd, double d1=1, double d2=1) {
if(!m1.valid || !m2.valid) return false;
// double rd = hdist(m1.h, m2.h) * xd;
// if(rd > rdz +1e-6 || rd< rdz-1e-6) printf("%lf %lf\n", rd, rdz);
double t = 0;
for(int i=0; i<3; i++) t += (m1.flat[i] - m2.flat[i]) * (m1.flat[i] - m2.flat[i]);
t = sqrt(t);
/* printf("%s ", display(m1.flat));
printf("%s ", display(m2.flat));
printf("%lf/%lf\n", t, rd); */
current_total_error += (t-rd) * (t-rd);
bool nonzero = abs(t-rd) > err_zero_current;
double force = (t - rd) / t / 2; // 20.0;
for(int i=0; i<3; i++) {
double di = (m2.flat[i] - m1.flat[i]) * force;
m1.flat[i] += di * d1;
m2.flat[i] -= di * d2;
if(nonzero && d2>0) enqueue(&m2);
}
return nonzero;
}
bool force(rugpoint& m1, rugpoint& m2, double rd, double d1=1, double d2=1) {
if(!m1.valid || !m2.valid) return false;
if(gwhere == gEuclid && fast_euclidean) {
return force_euclidean(m1, m2, rd, d1, d2);
}
// double rd = hdist(m1.h, m2.h) * xd;
// if(rd > rdz +1e-6 || rd< rdz-1e-6) printf("%lf %lf\n", rd, rdz);
using namespace hyperpoint_vec;
normalizer n(m1.flat, m2.flat);
hyperpoint f1 = n(m1.flat);
hyperpoint f2 = n(m2.flat);
ld t = hdist(f1, f2);
current_total_error += (t-rd) * (t-rd);
bool nonzero = abs(t-rd) > err_zero_current;
double forcev = (t - rd) / 2; // 20.0;
transmatrix T = gpushxto0(f1);
transmatrix T1 = spintox(T * f2) * T;
transmatrix iT1 = inverse(T1);
for(int i=0; i<3; i++) if(std::isnan(m1.flat[i])) {
addMessage("Failed!");
throw rug_exception();
}
/*
printf("%p %p\n", &m1, &m2);
printf("m1 = %s\n", display(m1.flat));
printf("m2 = %s\n", display(m2.flat));
printf("Mi * m1 = %s\n", display(Mi*m1.flat));
printf("Mi * m2 = %s\n", display(Mi*m2.flat));
printf(" f1 = %s\n", display(f1));
printf(" T * f1 = %s\n", display(T * f1));
printf("T1 * f1 = %s\n", display(T1 * f1));
printf(" f2 = %s\n", display(f2));
printf(" T * f2 = %s\n", display(T * f2));
printf("T1 * f2 = %s\n", display(T1 * f2));
printf("iT1 = %s\n", display(iT1 * C0));
printf("iT1 + t = %s\n", display(iT1 * xpush(t) * C0));
*/
f1 = iT1 * xpush(forcev) * C0;
f2 = iT1 * xpush(t-forcev) * C0;
m1.flat = n[f1];
m2.flat = n[f2];
if(nonzero && d2>0) enqueue(&m2);
return nonzero;
}
vector<pair<ld, rugpoint*> > preset_points;
void preset(rugpoint *m) {
int q = 0;
hyperpoint h;
for(int i=0; i<3; i++) h[i] = 0;
using namespace hyperpoint_vec;
preset_points.clear();
for(int j=0; j<size(m->edges); j++)
for(int k=0; k<j; k++) {
rugpoint *a = m->edges[j].target;
rugpoint *b = m->edges[k].target;
if(!a->valid) continue;
if(!b->valid) continue;
double blen = -1;
for(int j2=0; j2<size(a->edges); j2++)
if(a->edges[j2].target == b) blen = a->edges[j2].len;
if(blen <= 0) continue;
for(int j2=0; j2<size(a->edges); j2++)
for(int k2=0; k2<size(b->edges); k2++)
if(a->edges[j2].target == b->edges[k2].target && a->edges[j2].target != m) {
rugpoint *c = a->edges[j2].target;
if(!c->valid) continue;
double a1 = m->edges[j].len/blen;
double a2 = m->edges[k].len/blen;
double c1 = a->edges[j2].len/blen;
double c2 = b->edges[k2].len/blen;
double cz = (c1*c1-c2*c2+1) / 2;
double ch = sqrt(c1*c1 - cz*cz + 1e-10);
double az = (a1*a1-a2*a2+1) / 2;
double ah = sqrt(a1*a1 - az*az + 1e-10);
// c->h = a->h + (b->h-a->h) * cz + ch * ort
hyperpoint ort = (c->flat - a->flat - cz * (b->flat-a->flat)) / ch;
// m->h = a->h + (b->h-a->h) * az - ah * ort
hyperpoint res = a->flat + (b->flat-a->flat) * az - ah * ort;
h += res;
preset_points.emplace_back(hypot(blen * (ah+ch), blen * (az-cz)), c);
q++;
// printf("A %lf %lf %lf %lf C %lf %lf %lf %lf\n", a1, a2, az, ah, c1, c2, cz, ch);
}
}
if(q>0) m->flat = h/q;
// printf("preset (%d) -> %s\n", q, display(m->flat));
if(std::isnan(m->flat[0]) || std::isnan(m->flat[1]) || std::isnan(m->flat[2]))
throw rug_exception();
}
ld sse(hyperpoint h) {
ld sse = 0;
for(auto& p: preset_points) {
ld l = p.first;
normalizer n(h, p.second->flat);
hyperpoint h1 = n(h);
hyperpoint h2 = n(p.second->flat);
ld l0 = hdist(h1, h2);
sse += (l0-l) * (l0-l);
}
return sse;
}
void optimize(rugpoint *m, bool do_preset) {
if(do_preset) {
preset(m);
// int ed0 = size(preset_points);
for(auto& e: m->edges) if(e.target->valid)
preset_points.emplace_back(e.len, e.target);
if(gwhere >= gSphere) {
ld cur = sse(m->flat);
for(int it=0; it<500; it++) {
ld ex = exp(-it/60);
again:
hyperpoint last = m->flat;
switch(it%6) {
case 0: m->flat[0] += ex; break;
case 1: m->flat[0] -= ex; break;
case 2: m->flat[1] += ex; break;
case 3: m->flat[1] -= ex; break;
case 4: m->flat[2] += ex; break;
case 5: m->flat[2] -= ex; break;
}
ld now = sse(m->flat);
if(now < cur) { cur = now; ex *= 1.2; goto again; }
else m->flat = last;
}
// printf("edges = [%d] %d sse = %lf\n",ed0, size(preset_points), cur);
}
}
for(int it=0; it<50; it++)
for(int j=0; j<size(m->edges); j++)
force(*m, *m->edges[j].target, m->edges[j].len, 1, 0);
}
int divides = 0;
bool stop = false;
bool subdivide_further() {
if(torus) return false;
return size(points) * 4 < vertex_limit;
}
void subdivide() {
int N = size(points);
// if(euclid && gwhere == gEuclid) return;
if(!subdivide_further()) {
if(euclid && !bounded && gwhere == gEuclid) {
printf("Euclidean -- full precision\n");
stop = true;
}
else {
err_zero_current /= 2;
printf("increasing precision to %lg\n", err_zero_current);
for(auto p: points) enqueue(p);
}
return;
}
printf("subdivide (%d,%d)\n", N, size(triangles));
divides++;
vector<triangle> otriangles = triangles;
triangles.clear();
halves.clear();
// subdivide edges
for(int i=0; i<N; i++) {
rugpoint *m = points[i];
for(int j=0; j<size(m->edges); j++) {
rugpoint *m2 = m->edges[j].target;
if(m2 < m) continue;
rugpoint *mm = addRugpoint(mid(m->h, m2->h), (m->dist+m2->dist)/2);
halves[make_pair(m, m2)] = mm;
if(!good_shape || (torus && !keep_shape)) {
using namespace hyperpoint_vec;
normalizer n(m->flat, m2->flat);
hyperpoint h1 = n(m->flat);
hyperpoint h2 = n(m2->flat);
mm->flat = n[mid(h1, h2)];
}
mm->valid = true; qvalid++;
mm->inqueue = false; enqueue(mm);
}
m->edges.clear();
}
for(int i=0; i<size(otriangles); i++)
addTriangle1(otriangles[i].m[0], otriangles[i].m[1], otriangles[i].m[2]);
calcLengths();
printf("result (%d,%d)\n", size(points), size(triangles));
}
void addNewPoints() {
if(torus || qvalid == size(points)) {
subdivide();
return;
}
double dist = hdist0(points[qvalid]->h) + .1e-6;
int oqvalid = qvalid;
for(int i=0; i<size(points); i++) {
rugpoint& m = *points[i];
bool wasvalid = m.valid;
m.valid = wasvalid || sphere || hdist0(m.h) <= dist;
if(m.valid && !wasvalid) {
qvalid++;
if(!good_shape) optimize(&m, i > 7);
enqueue(&m);
}
}
if(qvalid != oqvalid) { printf("adding new points %4d %4d %4d %.9lf %9d %9d\n", oqvalid, qvalid, size(points), dist, dt, queueiter); }
}
void physics() {
if(keep_shape && good_shape) return;
auto t = SDL_GetTicks();
current_total_error = 0;
while(SDL_GetTicks() < t + 5 && !stop)
for(int it=0; it<50 && !stop; it++)
if(pqueue.empty()) addNewPoints();
else {
queueiter++;
rugpoint *m = pqueue.front();
pqueue.pop();
m->inqueue = false;
bool moved = false;
for(int j=0; j<size(m->edges); j++)
moved = force(*m, *m->edges[j].target, m->edges[j].len) || moved;
if(moved) enqueue(m);
}
}
// drawing the Rug
//-----------------
int eyemod;
void getco(rugpoint *m, hyperpoint& h, int &spherepoints) {
using namespace hyperpoint_vec;
h = m->getglue()->flat;
if(rug_perspective && gwhere >= gSphere) {
if(h[2] > 0) {
ld rad = hypot3(h);
// turn M_PI to -M_PI
// the only difference between sphere and elliptic is here:
// in elliptic, we subtract PI from the distance
ld rad_to = (gwhere == gSphere ? M_PI + M_PI : M_PI) - rad;
ld r = -rad_to / rad;
h *= r;
spherepoints++;
}
}
if(eyemod) h[0] += eyemod * h[2] * vid.eye;
}
extern int besti;
void drawTriangle(triangle& t) {
using namespace hyperpoint_vec;
for(int i: {0,1,2}) {
if(!t.m[i]->valid) return;
if(t.m[i]->dist >= sightrange+.51) return;
}
dt++;
int spherepoints = 0;
array<hyperpoint,3> h;
for(int i: {0,1,2}) getco(t.m[i], h[i], spherepoints);
if(spherepoints == 1 || spherepoints == 2) return;
hyperpoint hc = (h[1] - h[0]) ^ (h[2] - h[0]);
double hch = hypot3(hc);
glNormal3f(hc[0]/hch,hc[1]/hch,hc[2]/hch);
for(int i: {0,1,2}) {
glTexCoord2f(t.m[i]->x1, t.m[i]->y1);
glVertex3f(h[i][0], h[i][1], h[i][2]);
}
}
GLuint FramebufferName = 0;
GLuint renderedTexture = 0;
GLuint depth_stencil_rb = 0;
SDL_Surface *texture;
Uint32 *expanded_data;
void initTexture() {
if(!rendernogl) {
#if !ISPANDORA
FramebufferName = 0;
glGenFramebuffers(1, &FramebufferName);
glBindFramebuffer(GL_FRAMEBUFFER, FramebufferName);
glGenTextures(1, &renderedTexture);
glBindTexture(GL_TEXTURE_2D, renderedTexture);
glTexImage2D(GL_TEXTURE_2D, 0,GL_RGB, TEXTURESIZE, TEXTURESIZE, 0,GL_RGB, GL_UNSIGNED_BYTE, 0);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
#ifdef TEX
glFramebufferTexture(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, renderedTexture, 0);
#else
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, renderedTexture, 0);
#endif
GLenum DrawBuffers[1] = {GL_COLOR_ATTACHMENT0};
glDrawBuffers(1, DrawBuffers);
glGenRenderbuffers(1, &depth_stencil_rb);
glBindRenderbuffer(GL_RENDERBUFFER, depth_stencil_rb);
glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH24_STENCIL8, TEXTURESIZE, TEXTURESIZE);
glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, depth_stencil_rb);
glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_STENCIL_ATTACHMENT, GL_RENDERBUFFER, depth_stencil_rb);
if(glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE) {
addMessage("Failed to initialize the framebuffer");
rugged = false;
}
#endif
}
else {
texture = SDL_CreateRGBSurface(SDL_SWSURFACE,TEXTURESIZE,TEXTURESIZE,32,0,0,0,0);
glGenTextures( 1, &renderedTexture );
glBindTexture( GL_TEXTURE_2D, renderedTexture);
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR);
expanded_data = new Uint32[TEXTURESIZE * TEXTURESIZE];
}
}
void prepareTexture() {
videopar svid = vid;
setVidParam();
if(rendernogl) {
vid.usingGL = false;
SDL_Surface *sav = s;
s = texture;
SDL_FillRect(s, NULL, 0);
drawfullmap();
s = sav;
for(int y=0; y<TEXTURESIZE; y++) for(int x=0; x<TEXTURESIZE; x++)
expanded_data[y*TEXTURESIZE + x] = qpixel(texture, x, TEXTURESIZE-1-y) | 0xFF000000;
glBindTexture( GL_TEXTURE_2D, renderedTexture);
glTexImage2D( GL_TEXTURE_2D, 0, GL_RGBA, TEXTURESIZE, TEXTURESIZE, 0, GL_BGRA, GL_UNSIGNED_BYTE, expanded_data );
}
else {
#if !ISPANDORA
glBindFramebuffer(GL_FRAMEBUFFER, FramebufferName);
glViewport(0,0,TEXTURESIZE,TEXTURESIZE);
setGLProjection();
ptds.clear();
drawthemap();
if(mousing && !renderonce) {
for(int i=0; i<numplayers(); i++) if(multi::playerActive(i))
queueline(tC0(shmup::ggmatrix(playerpos(i))), mouseh, 0xFF00FF, 8);
}
drawqueue();
glBindFramebuffer(GL_FRAMEBUFFER, 0);
#endif
}
vid = svid;
if(!rendernogl) glViewport(0,0,vid.xres,vid.yres);
}
void closeTexture() {
if(rendernogl) {
SDL_FreeSurface(texture);
glDeleteTextures(1, &renderedTexture);
delete[] expanded_data;
}
else {
#if !ISPANDORA
glDeleteTextures(1, &renderedTexture);
glDeleteRenderbuffers(1, &depth_stencil_rb);
glDeleteFramebuffers(1, &FramebufferName);
#endif
}
}
double xview, yview;
void glcolorClear(int color) {
unsigned char *c = (unsigned char*) (&color);
glClearColor(c[3] / 255.0, c[2] / 255.0, c[1]/255.0, c[0] / 255.0);
}
void drawRugScene() {
GLfloat light_ambient[] = { 3.5, 3.5, 3.5, 1.0 };
GLfloat light_diffuse[] = { 1.0, 1.0, 1.0, 1.0 };
GLfloat light_position[] = { 0.0, 0.0, 0.0, 1.0 };
glLightfv(GL_LIGHT0, GL_AMBIENT, light_ambient);
glLightfv(GL_LIGHT0, GL_DIFFUSE, light_diffuse);
glLightfv(GL_LIGHT0, GL_POSITION, light_position);
glLightModeli(GL_LIGHT_MODEL_TWO_SIDE, GL_TRUE);
GLERR("lighting");
glEnable(GL_LIGHTING);
glEnable(GL_LIGHT0);
glBindTexture(GL_TEXTURE_2D, renderedTexture);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
if(backcolor == 0)
glClearColor(0.05,0.05,0.05,1);
else
glcolorClear(backcolor << 8 | 0xFF);
glClearDepth(1.0f);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glDisable(GL_BLEND);
glEnable(GL_TEXTURE_2D);
glEnable(GL_DEPTH_TEST);
glDepthFunc(GL_LESS);
ld tanfov = tan(fov * M_PI / 360);
if(rug_perspective) {
ld vnear = .001;
ld vfar = 1000;
ld sca = vnear * tanfov / vid.xres;
xview = -tanfov;
yview = -tanfov * vid.yres / vid.xres;
glFrustum(-sca * vid.xres, sca * vid.xres, -sca * vid.yres, sca * vid.yres, vnear, vfar);
}
else {
xview = tanfov * model_distance;
yview = tanfov * model_distance * vid.yres / vid.xres;
glOrtho(-xview, xview, -yview, yview, -1000, 1000);
}
glColor4f(1.f, 1.f, 1.f, 1.f);
if(rug_perspective && gwhere >= gSphere) {
glEnable(GL_FOG);
glFogi(GL_FOG_MODE, GL_LINEAR);
glFogf(GL_FOG_START, 0);
glFogf(GL_FOG_END, gwhere == gSphere ? 10 : 4);
}
if(vid.eye > .001 || vid.eye < -.001) {
selectEyeMask(1);
glClear(GL_DEPTH_BUFFER_BIT);
glBegin(GL_TRIANGLES);
eyemod = 1;
for(int t=0; t<size(triangles); t++)
drawTriangle(triangles[t]);
glEnd();
selectEyeMask(-1);
eyemod = -1;
glClear(GL_DEPTH_BUFFER_BIT);
glBegin(GL_TRIANGLES);
for(int t=0; t<size(triangles); t++)
drawTriangle(triangles[t]);
glEnd();
selectEyeMask(0);
}
else {
glBegin(GL_TRIANGLES);
for(int t=0; t<size(triangles); t++)
drawTriangle(triangles[t]);
glEnd();
}
glDisable(GL_TEXTURE_2D);
glDisable(GL_DEPTH_TEST);
glDisable(GL_LIGHTING);
glEnable(GL_BLEND);
glDisable(GL_FOG);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
selectEyeGL(0);
need_mouseh = true;
}
// organization
//--------------
transmatrix currentrot;
void init() {
#if CAP_GLEW
if(!glew) {
glew = true;
GLenum err = glewInit();
if (GLEW_OK != err) {
addMessage("Failed to initialize GLEW");
return;
}
}
#endif
if(rugged) return;
rugged = true;
if(scale < .01 || scale > 100) scale = 1;
initTexture();
if(renderonce) prepareTexture();
if(!rugged) return;
genrug = true;
drawthemap();
genrug = false;
qvalid = 0; dt = 0; queueiter = 0;
err_zero_current = err_zero;
try {
buildRug();
while(good_shape && subdivide_further()) subdivide();
currentrot = Id;
bool valid = true;
for(rugpoint *r: points)
if(r->x1<0 || r->x1>1 || r->y1<0 || r->y1 > 1)
valid = false;
if(sphere && pmodel == mdDisk && vid.alpha > 1)
valid = false;
if(!valid)
gotoHelp(
"Note: this mode is based on what you see on the screen -- but re-rendered in another way. "
"If not everything is shown on the screen (e.g., too zoomed in), the results will be incorrect "
"(though possibly interesting). "
"Use a different projection to fix this."
);
}
catch(rug_exception) {
close();
}
}
void close() {
if(!rugged) return;
rugged = false;
closeTexture();
triangles.clear();
for(int i=0; i<size(points); i++) delete points[i];
points.clear();
pqueue = queue<rugpoint*> ();
}
int lastticks;
ld protractor = 0;
void actDraw() {
try {
if(!renderonce) prepareTexture();
physics();
drawRugScene();
Uint8 *keystate = SDL_GetKeyState(NULL);
int qm = 0;
double alpha = (ticks - lastticks) / 1000.0;
lastticks = ticks;
transmatrix t = Id;
if(rug_perspective) {
if(keystate[SDLK_HOME]) qm++, t = t * rotmatrix(alpha, 0, 1), protractor += alpha;
if(keystate[SDLK_END]) qm++, t = t * rotmatrix(alpha, 1, 0), protractor -= alpha;
if(!keystate[SDLK_LSHIFT]) {
if(keystate[SDLK_DOWN]) qm++, t = t * rotmatrix(alpha, 2, 1), protractor += alpha;
if(keystate[SDLK_UP]) qm++, t = t * rotmatrix(alpha, 1, 2), protractor -= alpha;
if(keystate[SDLK_LEFT]) qm++, t = t * rotmatrix(alpha, 2, 0), protractor += alpha;
if(keystate[SDLK_RIGHT]) qm++, t = t * rotmatrix(alpha, 0, 2), protractor -= alpha;
}
ld push = 0;
if(keystate[SDLK_PAGEDOWN]) push -= alpha;
if(keystate[SDLK_PAGEUP]) push += alpha;
ld strafex = 0, strafey = 0;
if(keystate[SDLK_LSHIFT]) {
if(keystate[SDLK_LEFT]) strafex += alpha;
if(keystate[SDLK_RIGHT]) strafex -= alpha;
if(keystate[SDLK_UP]) strafey -= alpha;
if(keystate[SDLK_DOWN]) strafey += alpha;
}
if(qm) {
if(keystate[SDLK_LCTRL])
push_all_points(2, +model_distance);
for(int i=0; i<size(points); i++) {
points[i]->flat = t * points[i]->flat;
}
if(keystate[SDLK_LCTRL])
push_all_points(2, -model_distance);
}
model_distance -= push;
push_all_points(2, push);
push_all_points(0, strafex);
push_all_points(1, strafey);
}
else {
if(keystate[SDLK_HOME]) qm++, t = inverse(currentrot);
if(keystate[SDLK_END]) qm++, t = currentrot * rotmatrix(alpha, 0, 1) * inverse(currentrot);
if(keystate[SDLK_DOWN]) qm++, t = t * rotmatrix(alpha, 1, 2);
if(keystate[SDLK_UP]) qm++, t = t * rotmatrix(alpha, 2, 1);
if(keystate[SDLK_LEFT]) qm++, t = t * rotmatrix(alpha, 0, 2);
if(keystate[SDLK_RIGHT]) qm++, t = t * rotmatrix(alpha, 2, 0);
if(keystate[SDLK_PAGEUP]) model_distance /= exp(alpha);
if(keystate[SDLK_PAGEDOWN]) model_distance *= exp(alpha);
if(qm) {
currentrot = t * currentrot;
for(int i=0; i<size(points); i++) points[i]->flat = t * points[i]->flat;
}
}
}
catch(rug_exception) {
rug::close();
}
}
int besti;
void getco_pers(rugpoint *r, hyperpoint& p, int& spherepoints, bool& error) {
getco(r, p, spherepoints);
if(rug_perspective) {
if(p[2] >= 0)
error = true;
else {
p[0] /= p[2];
p[1] /= p[2];
}
}
}
static const ld RADAR_INF = 1e12;
ld radar_distance = RADAR_INF;
hyperpoint gethyper(ld x, ld y) {
double mx = ((x*2 / vid.xres)-1) * xview;
double my = (1-(y*2 / vid.yres)) * yview;
radar_distance = RADAR_INF;
double rx1=0, ry1=0;
bool found = false;
for(int i=0; i<size(triangles); i++) {
auto r0 = triangles[i].m[0];
auto r1 = triangles[i].m[1];
auto r2 = triangles[i].m[2];
hyperpoint p0, p1, p2;
bool error = false;
int spherepoints = 0;
getco_pers(r0, p0, spherepoints, error);
getco_pers(r1, p1, spherepoints, error);
getco_pers(r2, p2, spherepoints, error);
if(error || spherepoints == 1 || spherepoints == 2) continue;
double dx1 = p1[0] - p0[0];
double dy1 = p1[1] - p0[1];
double dx2 = p2[0] - p0[0];
double dy2 = p2[1] - p0[1];
double dxm = mx - p0[0];
double dym = my - p0[1];
// A (dx1,dy1) = (1,0)
// B (dx2,dy2) = (0,1)
double det = dx1*dy2 - dy1*dx2;
double tx = dxm * dy2 - dym * dx2;
double ty = -(dxm * dy1 - dym * dx1);
tx /= det; ty /= det;
if(tx >= 0 && ty >= 0 && tx+ty <= 1) {
double rz1 = p0[2] * (1-tx-ty) + p1[2] * tx + p2[2] * ty;
rz1 = -rz1; if(!rug_perspective) rz1 += model_distance;
if(rz1 < radar_distance) {
radar_distance = rz1;
rx1 = r0->x1 + (r1->x1 - r0->x1) * tx + (r2->x1 - r0->x1) * ty;
ry1 = r0->y1 + (r1->y1 - r0->y1) * tx + (r2->y1 - r0->y1) * ty;
}
found = true;
}
}
if(!found) return Hypc;
double px = rx1 * TEXTURESIZE, py = (1-ry1) * TEXTURESIZE;
videopar svid = vid;
setVidParam();
hyperpoint h = ::gethyper(px, py);
vid = svid;
return h;
}
void show() {
cmode = sm::SIDE | sm::MAYDARK;
gamescreen(0);
dialog::init(XLAT("hypersian rug mode"), iinf[itPalace].color, 150, 100);
dialog::addItem(XLAT("what's this?"), 'h');
dialog::addItem(XLAT("take me back"), 'q');
dialog::addBoolItem(XLAT("enable the Hypersian Rug mode"), rug::rugged, 'u');
dialog::addBoolItem(XLAT("render the texture only once"), (renderonce), 'o');
dialog::addBoolItem(XLAT("render texture without OpenGL"), (rendernogl), 'g');
dialog::addSelItem(XLAT("texture size"), its(texturesize)+"x"+its(texturesize), 's');
dialog::addSelItem(XLAT("vertex limit"), its(vertex_limit), 'v');
if(rug::rugged)
dialog::lastItem().value += " (" + its(qvalid) + ")";
dialog::addSelItem(XLAT("model distance"), fts(model_distance), 'd');
dialog::addBoolItem(XLAT("projection"), rug_perspective, 'p');
dialog::lastItem().value = XLAT(rug_perspective ? "perspective" :
gwhere == gEuclid ? "orthogonal" : "azimuthal equidistant");
if(!rug::rugged)
dialog::addSelItem(XLAT("native geometry"), XLAT(gwhere ? ginf[gwhere].name : "hyperbolic"), 'n');
else
dialog::addSelItem(XLAT("radar"), radar_distance == RADAR_INF ? "∞" : fts4(radar_distance), 'r');
if(!rug::rugged)
dialog::addSelItem(XLAT("model scale factor"), fts(modelscale), 'm');
else
dialog::addSelItem(XLAT("model iterations"), its(queueiter), 0);
dialog::addSelItem(XLAT("field of view"), fts(fov) + "°", 'f');
// dialog::addSelItem(XLAT("protractor"), fts(protractor * 180 / M_PI) + "°", 'f');
if(rug::rugged && torus)
dialog::addBoolItem(XLAT("keep shape"), keep_shape, 'k');
if(!(keep_shape && good_shape)) {
dialog::addSelItem(XLAT("maximum error"), ftsg(err_zero), 'e');
if(rug::rugged)
dialog::lastItem().value += " (" + ftsg(err_zero_current) + ")";
}
dialog::display();
keyhandler = [] (int sym, int uni) {
#if ISPANDORA
rendernogl = true;
#endif
dialog::handleNavigation(sym, uni);
if(uni == 'h') gotoHelp(
XLAT(
"In this mode, HyperRogue is played on a 3D model of a part of the hyperbolic plane, "
"similar to one you get from the 'paper model creator' or by hyperbolic crocheting.\n\n"
"This requires some OpenGL extensions and may crash or not work correctly -- enabling "
"the 'render texture without OpenGL' options may be helpful in this case. Also the 'render once' option "
"will make the rendering faster, but the surface will be rendered only once, so "
"you won't be able to play a game on it.\n\n"
"Use arrow keys to rotate, Page Up/Down to zoom.")
+ "\n\n" +
XLAT("In the perspective projection, you can use arrows to rotate the camera, Page Up/Down to go forward/backward, Shift+arrows to strafe, and Ctrl+arrows to rotate the model.")
);
else if(uni == 'u') {
if(rug::rugged) rug::close();
else rug::init();
}
else if(uni == 'o' && !rug::rugged)
renderonce = !renderonce;
else if(uni == 'v') {
dialog::editNumber(vertex_limit, 0, 50000, 500, 3000, "vertex limit",
"The more vertices, the more accurate the Hypersian Rug model is. "
"However, a number too high might make the model slow to compute and render."
);
dialog::reaction = [] () { err_zero_current = err_zero; };
}
else if(uni == 'r')
addMessage(XLAT("This just shows the 'z' coordinate of the selected point."));
else if(uni == 'm') {
dialog::editNumber(modelscale, 0.1, 10, .1, 1, "model scale factor",
"This is relevant when the native geometry is not Euclidean. "
"For example, if the native geometry is spherical, and scale < 1, a 2d sphere will be rendered as a subsphere; "
"if the native geometry is hyperbolic, and scale > 1, a hyperbolic plane will be rendered as an equidistant surface. "
);
dialog::scaleLog();
}
else if(uni == 'p') {
rug_perspective = !rug_perspective;
if(rugged) {
if(rug_perspective)
push_all_points(2, -model_distance);
else
push_all_points(2, +model_distance);
}
}
else if(uni == 'd')
dialog::editNumber(model_distance, -10, 10, .1, 1, "model distance",
"In the perspective projection, this sets the distance from the camera to the center of the model. "
"In the orthogonal projection this just controls the scale."
);
else if(uni == 'e') {
dialog::editNumber(err_zero, 1e-9, 1, .1, 1e-3, "maximum error",
"New points are added when the current error in the model is smaller than this value."
);
dialog::scaleLog();
dialog::reaction = [] () { err_zero_current = err_zero; };
}
else if(uni == 'k')
keep_shape = !keep_shape;
else if(uni == 'f') {
dialog::editNumber(fov, 1, 170, 1, 45, "field of view",
"Horizontal field of view, in the perspective projection. "
"In the orthogonal projection this just controls the scale."
);
}
else if(uni == 'n' && !rug::rugged)
gwhere = eGeometry((gwhere+1) % 4);
#if !ISPANDORA
else if(uni == 'g' && !rug::rugged)
rendernogl = !rendernogl;
#endif
else if(uni == 's' && !rug::rugged) {
texturesize *= 2;
if(texturesize == 8192) texturesize = 128;
}
else if(doexiton(sym, uni)) popScreen();
};
}
void select() {
pushScreen(rug::show);
}
int rugArgs() {
using namespace arg;
if(0) ;
else if(argis("-rugmodelscale")) {
shift(); modelscale = argf();
}
else if(argis("-ruggeo")) {
shift(); gwhere = (eGeometry) argi();
}
else if(argis("-rugpers")) {
rug_perspective = true;
}
else if(argis("-rugorth")) {
rug_perspective = false;
}
else if(argis("-rugerr")) {
shift(); err_zero = argf();
}
else if(argis("-rugkeep")) {
shift(); keep_shape = true;
}
else if(argis("-rugnokeep")) {
shift(); keep_shape = false;
}
else if(argis("-rugv")) {
shift(); vertex_limit = argi();
}
else return 1;
return 0;
}
auto rug_hook =
addHook(hooks_args, 100, rugArgs);
}
#else
// fake for mobile
namespace rug {
bool rugged = false;
bool renderonce = false;
bool rendernogl = true;
int texturesize = 512;
ld scale = 1.0f;
}
#endif
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