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fixed the coordinate system naming, and added a comment on these names

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Zeno Rogue 2023-01-07 16:52:24 +01:00
parent 8dede9f8a0
commit e4839a19b7
4 changed files with 24 additions and 24 deletions
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18
geometry.cpp
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@ -201,16 +201,16 @@ struct geometry_information {
int base_distlimit; int base_distlimit;
/* convert the tangent space in logical coordinates to actual coordinates */ /* convert the tangent space in logical coordinates to actual coordinates */
transmatrix logical_to_actual; transmatrix logical_to_intermediate;
/* convert the tangent space in actual coordinates to logical coordinates */ /* convert the tangent space in actual coordinates to logical coordinates */
transmatrix actual_to_logical; transmatrix intermediate_to_logical;
/* convert the tangent space in logical coordinates to actual coordinates */ /* convert the tangent space in logical coordinates to actual coordinates */
transmatrix logical_to_actual_units; transmatrix logical_scaled_to_intemediate;
/* convert the tangent space in actual coordinates to logical coordinates */ /* convert the tangent space in actual coordinates to logical coordinates */
transmatrix actual_to_logical_units; transmatrix intermediate_to_logical_scaled;
/** size of the Sword (from Orb of the Sword), used in the shmup mode */ /** size of the Sword (from Orb of the Sword), used in the shmup mode */
ld sword_size; ld sword_size;
@ -592,7 +592,7 @@ EX bool is_reg3_variation(eVariation var) {
} }
void geometry_information::prepare_lta() { void geometry_information::prepare_lta() {
auto& lta = logical_to_actual; auto& lta = logical_to_intermediate;
bool b = geom3::flipped; bool b = geom3::flipped;
if(b) geom3::light_flip(false); if(b) geom3::light_flip(false);
lta = Id; lta = Id;
@ -600,15 +600,15 @@ void geometry_information::prepare_lta() {
if(geom3::euc_vertical()) lta = cspin90(2, 1) * lta; if(geom3::euc_vertical()) lta = cspin90(2, 1) * lta;
if(geom3::hyp_in_solnih()) lta = cspin90(0, 1) * cspin90(1, 2) * cspin90(0, 1) * lta; if(geom3::hyp_in_solnih()) lta = cspin90(0, 1) * cspin90(1, 2) * cspin90(0, 1) * lta;
} }
logical_to_actual_units = lta; logical_scaled_to_intemediate = lta;
if(geom3::euc_in_noniso()) { if(geom3::euc_in_noniso()) {
lta = Id; lta = Id;
lta[0][0] *= geom3::euclid_embed_scale; lta[0][0] *= geom3::euclid_embed_scale;
lta[1][1] *= geom3::euclid_embed_scale * geom3::euclid_embed_scale_y; lta[1][1] *= geom3::euclid_embed_scale * geom3::euclid_embed_scale_y;
lta = logical_to_actual_units * cspin(0, 1, geom3::euclid_embed_rotate * degree) * lta; lta = logical_scaled_to_intemediate * cspin(0, 1, geom3::euclid_embed_rotate * degree) * lta;
} }
actual_to_logical = inverse(lta); intermediate_to_logical = inverse(lta);
actual_to_logical_units = inverse(logical_to_actual_units); intermediate_to_logical_scaled = inverse(logical_scaled_to_intemediate);
if(b) geom3::light_flip(true); if(b) geom3::light_flip(true);
} }

4
graph.cpp
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@ -5096,13 +5096,13 @@ EX void make_actual_view() {
transmatrix T = actual_view_transform * View; transmatrix T = actual_view_transform * View;
ld z = -tC0(view_inverse(T)) [2]; ld z = -tC0(view_inverse(T)) [2];
transmatrix R = actual_view_transform; transmatrix R = actual_view_transform;
R = cgi.logical_to_actual_units * R; R = cgi.logical_scaled_to_intemediate * R;
if(R[1][2] || R[2][2]) if(R[1][2] || R[2][2])
R = cspin(1, 2, -atan2(R[1][2], R[2][2])) * R; R = cspin(1, 2, -atan2(R[1][2], R[2][2])) * R;
if(R[0][2] || R[2][2]) if(R[0][2] || R[2][2])
R = cspin(0, 2, -atan2(R[0][2], R[2][2])) * R; R = cspin(0, 2, -atan2(R[0][2], R[2][2])) * R;
if(geom3::hyp_in_solnih()) R = Id; if(geom3::hyp_in_solnih()) R = Id;
R = cgi.actual_to_logical_units * R; R = cgi.intermediate_to_logical_scaled * R;
current_display->radar_transform = inverse(R) * zpush(-z); current_display->radar_transform = inverse(R) * zpush(-z);
} }
else if(gproduct) { else if(gproduct) {

22
hyperpoint.cpp
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@ -716,7 +716,7 @@ EX transmatrix spin(ld alpha) {
} }
EX transmatrix unswap_spin(transmatrix T) { EX transmatrix unswap_spin(transmatrix T) {
return cgi.actual_to_logical_units * T * cgi.logical_to_actual_units; return cgi.intermediate_to_logical_scaled * T * cgi.logical_scaled_to_intemediate;
} }
/** rotate by 90 degrees in the XY plane */ /** rotate by 90 degrees in the XY plane */
@ -1000,7 +1000,7 @@ EX void swapmatrix(transmatrix& T) {
} }
else if(geom3::euc_in_nil()) { else if(geom3::euc_in_nil()) {
if(!geom3::flipped) { if(!geom3::flipped) {
hyperpoint h1 = cgi.logical_to_actual * get_column(T, 2); hyperpoint h1 = cgi.logical_to_intermediate * get_column(T, 2);
// rotations are illegal anyway... // rotations are illegal anyway...
T = eupush(hyperpoint(h1[0], 0, h1[2], 1)); T = eupush(hyperpoint(h1[0], 0, h1[2], 1));
return; return;
@ -1008,19 +1008,19 @@ EX void swapmatrix(transmatrix& T) {
} }
else if(geom3::euc_in_solnih()) { else if(geom3::euc_in_solnih()) {
if(!geom3::flipped) { if(!geom3::flipped) {
hyperpoint h1 = cgi.logical_to_actual * get_column(T, 2); hyperpoint h1 = cgi.logical_to_intermediate * get_column(T, 2);
// rotations are illegal anyway... // rotations are illegal anyway...
T = eupush(hyperpoint(h1[0], h1[1], 0, 1)); T = eupush(hyperpoint(h1[0], h1[1], 0, 1));
return; return;
} }
} }
else if(geom3::euc_in_product()) { else if(geom3::euc_in_product()) {
hyperpoint h1 = cgi.logical_to_actual * get_column(T, 2); hyperpoint h1 = cgi.logical_to_intermediate * get_column(T, 2);
T = xpush(h1[0]) * zpush(h1[2]); T = xpush(h1[0]) * zpush(h1[2]);
return; return;
} }
else if(geom3::euc_in_sl2() && !geom3::flipped) { else if(geom3::euc_in_sl2() && !geom3::flipped) {
hyperpoint h1 = cgi.logical_to_actual * get_column(T, 2); h1[1] = 0; hyperpoint h1 = cgi.logical_to_intermediate * get_column(T, 2); h1[1] = 0;
T = esl2_ita(h1); T = esl2_ita(h1);
return; return;
} }
@ -1028,7 +1028,7 @@ EX void swapmatrix(transmatrix& T) {
/* just do nothing */ /* just do nothing */
} }
else if(geom3::euc_in_sph()) { else if(geom3::euc_in_sph()) {
hyperpoint h1 = cgi.logical_to_actual * get_column(T, 2); hyperpoint h1 = cgi.logical_to_intermediate * get_column(T, 2);
T = cspin(0, 2, h1[0]) * cspin(1, 3, h1[1]); T = cspin(0, 2, h1[0]) * cspin(1, 3, h1[1]);
} }
else { else {
@ -1046,25 +1046,25 @@ EX void swapmatrix(transmatrix& T) {
/** Just like swapmatrix but for hyperpoints. */ /** Just like swapmatrix but for hyperpoints. */
EX void swapmatrix(hyperpoint& h) { EX void swapmatrix(hyperpoint& h) {
if(geom3::euc_in_product()) { if(geom3::euc_in_product()) {
h = cgi.logical_to_actual * h; h = cgi.logical_to_intermediate * h;
h = xpush(h[0]) * zpush(h[2]) * C0; h = xpush(h[0]) * zpush(h[2]) * C0;
return; return;
} }
if(geom3::in_product()) return; if(geom3::in_product()) return;
if(geom3::sph_in_euc()) { h[3] = 1; return; } if(geom3::sph_in_euc()) { h[3] = 1; return; }
if(geom3::sph_in_hyp()) { h[0] *= sinh(1); h[1] *= sinh(1); h[2] *= sinh(1); h[3] = cosh(1); return; } if(geom3::sph_in_hyp()) { h[0] *= sinh(1); h[1] *= sinh(1); h[2] *= sinh(1); h[3] = cosh(1); return; }
if(geom3::euc_in_nil()) { h = cgi.logical_to_actual * h; h[3] = 1; h[1] = 0; return; } if(geom3::euc_in_nil()) { h = cgi.logical_to_intermediate * h; h[3] = 1; h[1] = 0; return; }
if(geom3::euc_in_sl2()) { if(geom3::euc_in_sl2()) {
hyperpoint h1 = cgi.logical_to_actual * h; h1[1] = 0; hyperpoint h1 = cgi.logical_to_intermediate * h; h1[1] = 0;
h = esl2_ita0(h1); h = esl2_ita0(h1);
return; return;
} }
if(geom3::euc_in_sph()) { if(geom3::euc_in_sph()) {
h = cgi.logical_to_actual * h; h = cgi.logical_to_intermediate * h;
h = cspin(0, 2, h[0]) * cspin(1, 3, h[1]) * lzpush(1) * C0; h = cspin(0, 2, h[0]) * cspin(1, 3, h[1]) * lzpush(1) * C0;
return; return;
} }
if(geom3::euc_in_solnih()) { h = cgi.logical_to_actual * h; h[3] = 1; h[2] = 0; return; } if(geom3::euc_in_solnih()) { h = cgi.logical_to_intermediate * h; h[3] = 1; h[2] = 0; return; }
if(geom3::hyp_in_solnih()) { if(geom3::hyp_in_solnih()) {
// copied from deparabolic13 // copied from deparabolic13
h /= (1 + h[2]); h /= (1 + h[2]);

4
hypgraph.cpp
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@ -2036,7 +2036,7 @@ EX void adjust_eye(transmatrix& T, cell *c, ld sign) {
/** achieve top-down perspective */ /** achieve top-down perspective */
EX transmatrix default_spin() { EX transmatrix default_spin() {
return cspin90(0, 1) * cgi.actual_to_logical_units; return cspin90(0, 1) * cgi.intermediate_to_logical_scaled;
} }
EX void centerpc(ld aspd) { EX void centerpc(ld aspd) {
@ -2239,7 +2239,7 @@ EX void resetview() {
if(WDIM == 2) vo = spin(M_PI + vid.fixed_facing_dir * degree) * vo; if(WDIM == 2) vo = spin(M_PI + vid.fixed_facing_dir * degree) * vo;
if(WDIM == 3) vo = cspin90(0, 2) * vo; if(WDIM == 3) vo = cspin90(0, 2) * vo;
vo = cgi.actual_to_logical_units * vo; vo = cgi.intermediate_to_logical_scaled * vo;
if(embedded_plane) vo = cspin90(1, 2) * vo; if(embedded_plane) vo = cspin90(1, 2) * vo;
if(embedded_plane && vid.wall_height < 0) vo = cspin180(0, 1) * vo; if(embedded_plane && vid.wall_height < 0) vo = cspin180(0, 1) * vo;