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fixed raycaster in sph_in_low; seems to still need fixing in non-regular

This commit is contained in:
Zeno Rogue 2022-12-15 21:17:08 +01:00
parent 9b91d46f47
commit 74b59d3331
2 changed files with 39 additions and 3 deletions
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10
hyperpoint.cpp
View File

@ -455,6 +455,16 @@ EX ld hypot_d(int d, const hyperpoint& h) {
*/
EX transmatrix to_other_side(hyperpoint h1, hyperpoint h2) {
if(geom3::sph_in_low() && !geom3::flipped) {
geom3::light_flip(true);
h1 = normalize(h1);
h2 = normalize(h2);
transmatrix T = to_other_side(h1, h2);
for(int i=0; i<4; i++) T[i][3] = T[3][i] = i == 3;
geom3::light_flip(false);
return T;
}
ld d = hdist(h1, h2);
hyperpoint v;

32
raycaster.cpp
View File

@ -395,6 +395,12 @@ void raygen::compute_which_and_dist(int flat1, int flat2) {
" mediump vec4 next_position = position + d * tangent;\n"
" if(dot(next_position, tangent) < dot(m*next_position, m*tangent)) continue;\n"
" d /= xspeed;\n";
else if(geom3::sph_in_hyp()) fmain +=
" mediump float v = ((zpush_h3(-1.) * (position - m * position))[3] / (zpush_h3(-1.) * (m * tangent - tangent))[3]);\n"
" if(v > 1. || v < -1.) continue;\n"
" mediump float d = atanh(v);\n"
" mediump vec4 next_tangent = position * sinh(d) + tangent * cosh(d);\n"
" if((zpush_h3(-1.) * next_tangent)[3] < (zpush_h3(-1.) * (m * next_tangent))[3]) continue;\n";
else if(hyperbolic) fmain +=
" mediump float v = ((position - m * position)[3] / (m * tangent - tangent)[3]);\n"
" if(v > 1. || v < -1.) continue;\n"
@ -406,6 +412,14 @@ void raygen::compute_which_and_dist(int flat1, int flat2) {
" mediump float d = atan(v);\n"
" mediump vec4 next_tangent = -position * sin(d) + tangent * cos(d);\n"
" if(next_tangent[3] > (m * next_tangent)[3]) continue;\n";
else if(geom3::sph_in_euc()) fmain +=
" vec4 tctr = vec4(0, 0, 1, 0);\n"
" mediump float deno = dot(position-tctr, tangent) - dot(m*position-tctr, m*tangent);\n"
" if(deno < 1e-6 && deno > -1e-6) continue;\n"
" mediump float d = (dot(m*position-tctr, m*position-tctr) - dot(position-tctr, position-tctr)) / 2. / deno;\n"
" if(d < 0.) continue;\n"
" mediump vec4 next_position = position + d * tangent;\n"
" if(dot(next_position - tctr, tangent) < dot(m*next_position - tctr, m*tangent)) continue;\n";
else fmain +=
" mediump float deno = dot(position, tangent) - dot(m*position, m*tangent);\n"
" if(deno < 1e-6 && deno > -1e-6) continue;\n"
@ -1517,6 +1531,15 @@ void raygen::add_functions() {
"sinh(x), 0., 0., cosh(x)"
");}\n");
add_if("zpush_h3",
"mediump mat4 zpush_h3(float x) { return mat4("
"1., 0., 0., 0.,\n"
"0., 1., 0., 0.,\n"
"0., 0., cosh(x), sinh(x),\n"
"0., 0., sinh(x), cosh(x)"
");}\n");
add_if("xpush_h2",
"mediump mat4 xpush_h2(float x) { return mat4("
@ -2096,9 +2119,10 @@ EX transmatrix get_ms(cell *c, int a, bool mirror) {
}
h = normalize(h);
ld d = hdist0(h);
if(moved_center()) d -= 1;
if(h[2] > 0) d = -d;
if(mirror) return MirrorZ * zpush(2*d);
return zpush(2*d);
if(mirror) return MirrorZ * lzpush(2*d);
return lzpush(2*d);
}
}
@ -2545,9 +2569,11 @@ EX void cast() {
transmatrix msm = stretch::mstretch_matrix;
hyperpoint TC0 = tile_center();
back:
for(int a=0; a<cs->type; a++)
if(hdist0(currentmap->ray_iadj(cs, a) * tC0(T)) < hdist0(tC0(T))) {
if(hdist(currentmap->ray_iadj(cs, a) * T * C0, TC0) < hdist(T * C0, TC0)) {
T = currentmap->iadj(cs, a) * T;
if(o->uToOrig != -1) {
transmatrix HT = currentmap->adj(cs, a);