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raycasting in 2D

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Zeno Rogue
2020-06-03 15:11:20 +02:00
parent fad1c650c7
commit 2a0b0101fd
8 changed files with 94 additions and 39 deletions
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33
nonisotropic.cpp
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@@ -1068,6 +1068,9 @@ EX namespace hybrid {
EX transmatrix ray_iadj(cell *c, int i) {
if(prod && i == c->type-2) return (mscale(Id, +cgi.plevel));
if(prod && i == c->type-1) return (mscale(Id, -cgi.plevel));
if(WDIM == 2) {
return to_other_side(get_corner_position(c, i), get_corner_position(c, (i+1)));
}
if(prod) {
transmatrix T;
cell *cw = hybrid::get_where(c).first;
@@ -1253,6 +1256,11 @@ EX namespace hybrid {
EX hyperpoint get_corner(cell *c, int i, int next, ld z) {
ld lev = cgi.plevel * z / 2;
if(WDIM == 2) {
ld zz = lerp(cgi.FLOOR, cgi.WALL, (1+z) / 2);
hyperpoint h = zshift(get_corner_position(c, i+next), zz);
return h;
}
if(prod) {
dynamicval<eGeometry> g(geometry, hybrid::underlying);
dynamicval<geometry_information*> gc(cgip, hybrid::underlying_cgip);
@@ -1276,24 +1284,25 @@ EX namespace hybrid {
EX int wall_offset(cell *c) {
if(GOLDBERG) {
/* a bit slow... */
cell *c1 = get_where(c).first;
gp::draw_li = PIU(gp::get_local_info(c1));
cell *c1 = WDIM == 2 ? c : get_where(c).first;
gp::draw_li = WDIM == 2 ? gp::get_local_info(c1) : PIU(gp::get_local_info(c1));
}
int id = hybrid::underlying == gArchimedean ? arcm::id_of(c->master) + 20 * arcm::parent_index_of(c->master) : shvid(c);
auto ugeometry = hybri ? hybrid::underlying : geometry;
int id = ugeometry == gArchimedean ? arcm::id_of(c->master) + 20 * arcm::parent_index_of(c->master) : shvid(c);
if(isize(cgi.walloffsets) <= id) cgi.walloffsets.resize(id+1, {-1, nullptr});
auto &wop = cgi.walloffsets[id];
int &wo = wop.first;
if(!wop.second) wop.second = c;
if(wo == -1) {
cell *c1 = hybrid::get_where(c).first;
cell *c1 = hybri ? hybrid::get_where(c).first : c;
wo = isize(cgi.shWall3D);
int won = wo + c->type;
int won = wo + c->type + (WDIM == 2 ? 2 : 0);
if(!cgi.wallstart.empty()) cgi.wallstart.pop_back();
cgi.reserve_wall3d(won);
if(prod) for(int i=0; i<c1->type; i++) {
if(prod || WDIM == 2) for(int i=0; i<c1->type; i++) {
hyperpoint w;
((hrmap_hybrid*)currentmap)->in_underlying([&] {
auto f = [&] {
/* mirror image of C0 in the axis h1-h2 */
hyperpoint h1 = get_corner_position(c1, i);
hyperpoint h2 = get_corner_position(c1, i+1);
@@ -1302,7 +1311,11 @@ EX namespace hybrid {
w = T * C0;
w[1] = -w[1];
w = inverse(T) * w;
});
};
if(prod)
((hrmap_hybrid*)currentmap)->in_underlying(f);
else
f();
cgi.walltester[wo + i] = w;
}
@@ -1314,7 +1327,7 @@ EX namespace hybrid {
int z = a ? 1 : -1;
hyperpoint ctr = zpush0(z * cgi.plevel/2);
for(int i=0; i<c1->type; i++)
if(prod)
if(prod || WDIM == 2)
l.push_back(hybrid::get_corner(c1, i, 0, z));
else {
l.push_back(ctr);
@@ -1341,7 +1354,7 @@ EX namespace hybrid {
});
EX vector<pair<int, cell*>> gen_sample_list() {
if(!hybri) return {make_pair(0, centerover), make_pair(centerover->type, nullptr)};
if(!hybri && WDIM != 2) return {make_pair(0, centerover), make_pair(centerover->type, nullptr)};
vector<pair<int, cell*>> result;
for(auto& v: cgi.walloffsets) if(v.first >= 0) result.push_back(v);
sort(result.begin(), result.end());