From 3568412f8f230774d0d11d7ed1c897424f95d3ef Mon Sep 17 00:00:00 2001 From: Sebastiano Tronto Date: Thu, 11 Nov 2021 21:37:34 +0100 Subject: Rewritten from scratch. Welocme nissy 2.0! --- old/2021-05-26-before-restyle/transformations.c | 200 ++++++++++++++++++++++++ 1 file changed, 200 insertions(+) create mode 100644 old/2021-05-26-before-restyle/transformations.c (limited to 'old/2021-05-26-before-restyle/transformations.c') diff --git a/old/2021-05-26-before-restyle/transformations.c b/old/2021-05-26-before-restyle/transformations.c new file mode 100644 index 0000000..c457f0c --- /dev/null +++ b/old/2021-05-26-before-restyle/transformations.c @@ -0,0 +1,200 @@ +#include "transformations.h" + +int edge_slice(int e); /* Return slice (e=0, s=1, m=2) to which e belongs */ +Cube rotate_via_compose(Transformation r, Cube c, PieceFilter f); +bool read_rtables_file(); +bool write_rtables_file(); + +/* Values mod 3 to determine from which side to take the state to convert */ +int epose_source[NTRANS]; /* 0 = epose, 1 = eposs, 2 = eposm */ +int eposs_source[NTRANS]; +int eposm_source[NTRANS]; +int eofb_source[NTRANS]; /* 0 = eoud, 1 = eorl, 2 = eofb */ +int eorl_source[NTRANS]; +int eoud_source[NTRANS]; +int coud_source[NTRANS]; /* 0 = coud, 1 = corl, 2 = cofb */ +int cofb_source[NTRANS]; +int corl_source[NTRANS]; + +/* Transition tables for rotations (n+1 is mirror) */ +uint16_t epose_rtable[NTRANS][factorial12/factorial8]; +uint16_t eposs_rtable[NTRANS][factorial12/factorial8]; +uint16_t eposm_rtable[NTRANS][factorial12/factorial8]; +uint16_t eo_rtable[NTRANS][pow2to11]; +uint16_t cp_rtable[NTRANS][factorial8]; +uint16_t co_rtable[NTRANS][pow3to7]; +uint16_t cpos_rtable[NTRANS][factorial6]; + +/* Same for moves */ +uint16_t moves_rtable[NTRANS][NMOVES]; + +NissMove rotation_niss[NTRANS][6]; + +int edge_slice(int e) { + if (e == FR || e == FL || e == BL || e == BR) + return 0; + if (e == UR || e == UL || e == DR || e == DL) + return 1; + return 2; +} + +Cube rotate_via_compose(Transformation r, Cube c, PieceFilter f) { + if (r != mirror) { + return apply_alg_filtered(rotation_niss[r], c, f); + } else { + static int zero12[12] = {0,0,0,0,0,0,0,0,0,0,0,0}, + zero8[12] = {0,0,0,0,0,0,0,0}, + mirror_ep[12] = {UF,UR,UB,UL,DF,DR,DB,DL,FL,FR,BR,BL}, + mirror_cp[8] = {UFL, UFR, UBR, UBL, DFL, DFR, DBR, DBL}, + mirror_cpos[6] = + {U_center,D_center,L_center,R_center,F_center,B_center}; + return move_via_arrays((CubeArray){ + .ep = mirror_ep, .eofb = zero12, .eorl = zero12, .eoud = zero12, + .cp = mirror_cp, .coud = zero8, .corl = zero8, .cofb = zero8, + .cpos = mirror_cpos}, c, f); + } +} + +bool read_rtables_file() { + FILE *ttf; + long unsigned int me[12] = { factorial12/factorial8, factorial12/factorial8, + factorial12/factorial8, pow2to11, pow2to11, pow2to11, + factorial8, pow3to7, pow3to7, pow3to7, factorial6, NMOVES }; + if ((ttf = fopen("rtables", "rb")) != NULL) { + bool r = true; + for (int m = 0; m < NTRANS; m++) { + r = r && fread(epose_rtable[m], sizeof(uint16_t), me[0], ttf) == me[0]; + r = r && fread(eposs_rtable[m], sizeof(uint16_t), me[1], ttf) == me[1]; + r = r && fread(eposm_rtable[m], sizeof(uint16_t), me[2], ttf) == me[2]; + r = r && fread(eo_rtable[m], sizeof(uint16_t), me[3], ttf) == me[3]; + r = r && fread(cp_rtable[m], sizeof(uint16_t), me[6], ttf) == me[6]; + r = r && fread(co_rtable[m], sizeof(uint16_t), me[7], ttf) == me[7]; + r = r && fread(cpos_rtable[m], sizeof(uint16_t), me[10], ttf) == me[10]; + r = r && fread(moves_rtable[m], sizeof(uint16_t), me[11], ttf) == me[11]; + } + fclose(ttf); + return r; + } else return false; +} + +bool write_rtables_file() { + FILE *ttf; + long unsigned int me[12] = { factorial12/factorial8, factorial12/factorial8, + factorial12/factorial8, pow2to11, pow2to11, pow2to11, + factorial8, pow3to7, pow3to7, pow3to7, factorial6, NMOVES }; + if ((ttf = fopen("rtables", "wb")) != NULL) { + bool r = true; + for (int m = 0; m < NTRANS; m++) { + r = r && fwrite(epose_rtable[m], sizeof(uint16_t), me[0], ttf) == me[0]; + r = r && fwrite(eposs_rtable[m], sizeof(uint16_t), me[1], ttf) == me[1]; + r = r && fwrite(eposm_rtable[m], sizeof(uint16_t), me[2], ttf) == me[2]; + r = r && fwrite(eo_rtable[m], sizeof(uint16_t), me[3], ttf) == me[3]; + r = r && fwrite(cp_rtable[m], sizeof(uint16_t), me[6], ttf) == me[6]; + r = r && fwrite(co_rtable[m], sizeof(uint16_t), me[7], ttf) == me[7]; + r = r && fwrite(cpos_rtable[m], sizeof(uint16_t), me[10],ttf) == me[10]; + r = r && fwrite(moves_rtable[m], sizeof(uint16_t), me[11],ttf) == me[11]; + } + fclose(ttf); + return r; + } else return false; +} + +void init_transformations(bool read, bool write) { + /* Compute sources */ + for (int i = 0; i < NTRANS; i++) { + Cube cube = {0}; + if (i != mirror) + cube = apply_alg(rotation_algs[i], (Cube){0}); + epose_source[i] = edge_slice(edge_at(cube, FR)); + eposs_source[i] = edge_slice(edge_at(cube, UR)); + eposm_source[i] = edge_slice(edge_at(cube, UF)); + eofb_source[i] = center_at(cube, F_center)/2; + eorl_source[i] = center_at(cube, R_center)/2; + eoud_source[i] = center_at(cube, U_center)/2; + coud_source[i] = center_at(cube, U_center)/2; + cofb_source[i] = center_at(cube, F_center)/2; + corl_source[i] = center_at(cube, R_center)/2; + } + + /*TODO: maybe move down*/ + /* Compute rotation_niss array, necessary for rotate_via_compose */ + for (int r = 0; r != mirror; r++) { + concat(rotation_algs[r], rotation_algs[r], rotation_niss[r]); + for (int i = len(rotation_algs[r]); rotation_niss[r][i].m != NULLMOVE; i++) + rotation_niss[r][i].inverse = true; + } + + /* If I can read tables from file, I stop here */ + if (read) + if (read_rtables_file()) + return; + + /* Initialize tables */ + for (int m = 0; m < NTRANS; m++) { + int eparr[12] = {0,0,0,0,0,0,0,0,0,0,0,0}, cparr[8] = {0,0,0,0,0,0,0,0}; + CubeArray epcp = { .ep = eparr, .cp = cparr }; + cube_to_arrays(apply_alg(rotation_algs[m], (Cube){0}), &epcp, + (PieceFilter){.epose=true,.eposs=true,.eposm=true,.cp=true}); + for (uint16_t i = 0; i < factorial12/factorial8; i++) { + Cube c[3] = { admissible_ep((Cube){ .epose = i}, pf_e), + admissible_ep((Cube){ .eposs = i}, pf_s), + admissible_ep((Cube){ .eposm = i}, pf_m) }; + epose_rtable[m][i]=rotate_via_compose(m,c[epose_source[m]],pf_ep).epose; + eposs_rtable[m][i]=rotate_via_compose(m,c[eposs_source[m]],pf_ep).eposs; + eposm_rtable[m][i]=rotate_via_compose(m,c[eposm_source[m]],pf_ep).eposm; + } + for (uint16_t i = 0; i < pow2to11; i++ ) { + int eoarr[12]; + int_to_sum_zero_array(i, 2, 12, eoarr); + apply_permutation(eparr, eoarr, 12); + eo_rtable[m][i] = digit_array_to_int(eoarr, 11, 2); + } + for (uint16_t i = 0; i < pow3to7; i++) { + int coarr[12]; + int_to_sum_zero_array(i, 3, 8, coarr); + apply_permutation(cparr, coarr, 8); + co_rtable[m][i] = digit_array_to_int(coarr, 7, 3); + } + for (uint16_t i = 0; i < factorial8; i++) + cp_rtable[m][i] = rotate_via_compose(m, (Cube){.cp=i}, pf_cp).cp; + for (uint16_t i = 0; i < factorial6; i++) + cpos_rtable[m][i] = rotate_via_compose(m, (Cube){.cpos=i}, pf_cpos).cpos; + for (Move i = 0; i < NMOVES; i++) { + Cube aux = transform_cube(m, move_cube(i, (Cube){0})); + for (Move move = 0; move < NMOVES; move++) + if (is_solved(move_cube(inverse[move], aux))) + moves_rtable[m][i] = move; + } + } + + if (write) + if (!write_rtables_file()) + printf("Error in writing rtables: file not writable\n"); +} + +Cube transform_cube(Transformation t, Cube cube) { + Cube transformed = {0}; + + uint16_t aux_epos[3] = { cube.epose, cube.eposs, cube.eposm }, + aux_eo[3] = { cube.eoud, cube.eorl, cube.eofb }, + aux_co[3] = { cube.coud, cube.corl, cube.cofb }; + + transformed.epose = epose_rtable[t][aux_epos[epose_source[t]]]; + transformed.eposs = eposs_rtable[t][aux_epos[eposs_source[t]]]; + transformed.eposm = eposm_rtable[t][aux_epos[eposm_source[t]]]; + transformed.eofb = eo_rtable[t][aux_eo[eofb_source[t]]]; + transformed.eorl = eo_rtable[t][aux_eo[eorl_source[t]]]; + transformed.eoud = eo_rtable[t][aux_eo[eoud_source[t]]]; + transformed.coud = co_rtable[t][aux_co[coud_source[t]]]; + transformed.corl = co_rtable[t][aux_co[corl_source[t]]]; + transformed.cofb = co_rtable[t][aux_co[cofb_source[t]]]; + transformed.cp = cp_rtable[t][cube.cp]; + transformed.cpos = cpos_rtable[t][cube.cpos]; + + return transformed; +} + +void transform_alg(Transformation t, NissMove *alg) { + for (int i = 0; alg[i].m; i++) + alg[i].m = moves_rtable[t][alg[i].m]; +} -- cgit v1.3