mirrors/hyperrogue
1
0
Fork 0
mirror of https://github.com/zenorogue/hyperrogue.git synced 2026-03-12 08:09:43 +00:00
Code Issues Releases Wiki Activity

solv:: lazy version of inv_exp

Browse Source
This commit is contained in:
Zeno Rogue
2019-07-31 12:19:39 +02:00
parent 8ba99c42a0
commit b898365d68
3 changed files with 15 additions and 10 deletions
Download Patch File Download Diff File Expand all files Collapse all files

21
sol.cpp
View File

@@ -111,21 +111,26 @@ namespace solv {
return 0.5 - atan((0.5-x) / y) / M_PI;
}
pt inverse_exp(pt h) {
pt inverse_exp(pt h, bool lazy) {
load_table();
ld ix = h[0] >= 0. ? x_to_ix(h[0]) : -x_to_ix(-h[0]);
ld iy = h[1] >= 0. ? x_to_ix(h[1]) : -x_to_ix(-h[1]);
ld ix = h[0] >= 0. ? x_to_ix(h[0]) : x_to_ix(-h[0]);
ld iy = h[1] >= 0. ? x_to_ix(h[1]) : x_to_ix(-h[1]);
ld iz = tanh(h[2]);
if(ix < 0.) ix = -ix;
if(iy < 0.) iy = -iy;
if(iz < 0.) { iz = -iz; ld s = ix; ix = iy; iy = s; }
if(h[2] < 0.) { iz = -iz; swap(ix, iy); }
ix *= PRECX-1;
iy *= PRECY-1;
iz *= PRECZ-1;
if(lazy) {
auto r = inverse_exp_table[(iz*PRECY+iy)*PRECX+ix];
hyperpoint res = C0;
for(int i=0; i<3; i++) res[i] = r[i];
return res;
}
if(ix >= PRECX-1) ix = PRECX-2;
if(iy >= PRECX-1) iy = PRECX-2;
@@ -135,7 +140,7 @@ namespace solv {
int ay = iy, by = ay+1;
int az = iz, bz = az+1;
pt res;
pt res = C0;
#define S0(x,y,z) inverse_exp_table[(z*PRECY+y)*PRECX+x][t]
#define S1(x,y) (S0(x,y,az) * (bz-iz) + S0(x,y,bz) * (iz-az))