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ray:: fixup to solv portals

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This commit is contained in:
Zeno Rogue 2021-10-07 13:24:39 +02:00
parent 2e5b46ff45
commit 6605092515
1 changed files with 22 additions and 16 deletions
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38
raycaster.cpp
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@ -1011,17 +1011,21 @@ void raygen::emit_intra_portal(int gid1, int gid2) {
fmain +=
" mediump vec4 nposition = position + tangent * 1e-3;\n"
" mediump mat4 tkt = " + getM("mid+1") + ";\n"
" position = tkt * minkowski_to_bt(position);\n"
" nposition = tkt * minkowski_to_bt(nposition);\n"
" position.xyz *= " + glhr::to_glsl(log(2)/2) + ";\n"
" nposition.xyz *= " + glhr::to_glsl(log(2)/2) + ";\n";
" position = minkowski_to_bt(position);\n"
" nposition = minkowski_to_bt(nposition);\n"
" position = tkt * position;\n"
" nposition = tkt * nposition;\n"
" position.z *= exp(position.y);\n"
" nposition.z *= exp(nposition.y);\n";
}
else if(sol) {
fmain +=
" mediump vec4 nposition = position + tangent * 1e-3;\n"
" mediump mat4 tkt = " + getM("mid+1") + ";\n"
" position = tkt * position;\n"
" nposition = tkt * nposition;\n";
" nposition = tkt * nposition;\n"
" position.z *= exp(-position.y);\n"
" nposition.z *= exp(-nposition.y);\n";
}
else {
fmain +=
@ -1089,6 +1093,8 @@ void raygen::emit_intra_portal(int gid1, int gid2) {
fmain +=
" mediump mat4 itkt = " + getM("mid+2") + ";\n";
fmain +=
" position.z *= exp(position.y);\n"
" nposition.z *= exp(nposition.y);\n"
" position = itkt * position;\n"
" nposition = itkt * nposition;\n"
" tangent = (nposition - position) * 1e3;\n"
@ -1102,10 +1108,12 @@ void raygen::emit_intra_portal(int gid1, int gid2) {
string sgn = hyperbolic ? "-" : "+";
if(hyperbolic && bt::in()) {
fmain +=
" position.xyz *= " + glhr::to_glsl(2/log(2)) + ";\n"
" nposition.xyz *= " + glhr::to_glsl(2/log(2)) + ";\n"
" position = bt_to_minkowski(itkt * position);\n"
" nposition = bt_to_minkowski(itkt * nposition);\n";
" position.z *= exp(-position.y);\n"
" nposition.z *= exp(-nposition.y);\n"
" position = itkt * position;\n"
" nposition = itkt * nposition;\n"
" position = bt_to_minkowski(position);\n"
" nposition = bt_to_minkowski(nposition);\n";
}
else {
string he = hyperbolic ? "from_poco_h3" : "from_poco_s3";
@ -1470,27 +1478,25 @@ void raygen::add_functions() {
");}\n"
);
// these minkowski_to_bt and bt_to_minkowski do not take binary_width nor log(2)/2 into account
add_if("minkowski_to_bt",
"mediump vec4 minkowski_to_bt(mediump vec4 h) {\n"
" h /= (1. + h[3]);\n"
" h[0] -= 1.;\n"
" h /= h.x*h.x + h.y*h.y + h.z * h.z;\n"
" h[0] += .5;\n"
" float co = " + glhr::to_glsl(vid.binary_width / log(2) / 8) + ";\n"
" mediump vec4 res;\n"
" res.x = h.y / co;\n"
" res.y = h.z / co;\n"
" res.z = (log(2.) + log(-h.x)) / (log(2.)/2.);\n"
" res.x = h.y * 2.;\n"
" res.y = h.z * 2.;\n"
" res.z = (log(2.) + log(-h.x));\n"
" res.w = 1.;\n"
" return res;\n"
" }\n\n");
add_if("bt_to_minkowski",
"mediump vec4 bt_to_minkowski(mediump vec4 h) {\n"
" h.z = h.z * " + glhr::to_glsl(log(2)/2) + ";\n"
" mediump vec4 res;\n"
" float co = " + glhr::to_glsl(vid.binary_width / log(2) / 4) + ";\n"
" h.x *= co; h.y *= co;\n"
" float diag = (h.x*h.x + h.y*h.y)/2.;\n"
" res.x = sinh(h.z) + diag * exp(-h.z);\n"
" res.y = h.x * exp(-h.z);\n"