mirrors/hyperrogue
1
0
Fork 0
mirror of https://github.com/zenorogue/hyperrogue.git synced 2025-12-24 06:26:02 +00:00
Code Issues Releases Wiki Activity

updated to 10.0c

Browse Source
This commit is contained in:
Zeno Rogue
2017-07-23 01:33:27 +02:00
parent ce5650a81f
commit 8cb8e2a3ec
45 changed files with 2384 additions and 1359 deletions
Download Patch File Download Diff File Expand all files Collapse all files

16
hyperpoint.cpp
View File

@@ -166,6 +166,9 @@ const transmatrix Id = {{{1,0,0}, {0,1,0}, {0,0,1}}};
// mirror image
const transmatrix Mirror = {{{1,0,0}, {0,-1,0}, {0,0,1}}};
// mirror image
const transmatrix MirrorX = {{{-1,0,0}, {0,1,0}, {0,0,1}}};
// rotate by PI
const transmatrix pispin = {{{-1,0,0}, {0,-1,0}, {0,0,1}}};
@@ -368,20 +371,25 @@ void display(const transmatrix& T) {
printf("\n\n");
}
transmatrix inverse(transmatrix T) {
profile_start(7);
ld det(const transmatrix& T) {
ld det = 0;
for(int i=0; i<3; i++)
det += T[0][i] * T[1][(i+1)%3] * T[2][(i+2)%3];
for(int i=0; i<3; i++)
det -= T[0][i] * T[1][(i+2)%3] * T[2][(i+1)%3];
return det;
}
transmatrix inverse(const transmatrix& T) {
profile_start(7);
ld d = det(T);
transmatrix T2;
if(det == 0) return T2;
if(d == 0) return T2;
for(int i=0; i<3; i++)
for(int j=0; j<3; j++)
T2[j][i] = (T[(i+1)%3][(j+1)%3] * T[(i+2)%3][(j+2)%3] - T[(i+1)%3][(j+2)%3] * T[(i+2)%3][(j+1)%3]) / det;
T2[j][i] = (T[(i+1)%3][(j+1)%3] * T[(i+2)%3][(j+2)%3] - T[(i+1)%3][(j+2)%3] * T[(i+2)%3][(j+1)%3]) / d;
profile_stop(7);
return T2;