mirror of
https://github.com/zenorogue/hyperrogue.git
synced 2024-12-25 17:40:36 +00:00
188 lines
5.1 KiB
C++
188 lines
5.1 KiB
C++
namespace hr {
|
|
|
|
namespace ads_game {
|
|
|
|
struct earth_texture {
|
|
string filename;
|
|
string copyright;
|
|
texture::texture_data tex;
|
|
basic_textureinfo tinf;
|
|
bool loaded;
|
|
};
|
|
|
|
vector<earth_texture> earth_textures;
|
|
|
|
struct texture_to_use {
|
|
ld from, ctr, to;
|
|
earth_texture *tx;
|
|
};
|
|
|
|
vector<texture_to_use> textures_to_use;
|
|
|
|
void reset_textures() {
|
|
textures_to_use.clear();
|
|
}
|
|
|
|
void init_textures() {
|
|
earth_textures.clear();
|
|
string dir = "ds-images/";
|
|
fhstream f(dir + "list.txt", "rt");
|
|
if(!f.f) return;
|
|
string cur_copyright = "";
|
|
while(!feof(f.f)) {
|
|
string s = scanline_noblank(f);
|
|
if(s == "") continue;
|
|
if(s[0] == '#') continue;
|
|
if(s[0] == '$') { cur_copyright = s.substr(1); continue; }
|
|
if(s.substr(0, 2) == "*/") s = dir + s.substr(2);
|
|
earth_textures.emplace_back();
|
|
auto& et = earth_textures.back();
|
|
println(hlog, "trying '", s, "'");
|
|
et.filename = s;
|
|
et.copyright = cur_copyright;
|
|
et.loaded = false;
|
|
|
|
auto& tex = et.tex;
|
|
tex.readtexture(s);
|
|
int tty = tex.theight - 2 * tex.base_y;
|
|
int u = 1;
|
|
for(int y=0; y<tex.theight; y++)
|
|
for(int x=0; x<tex.twidth; x++)
|
|
tex.get_texture_pixel(x, y) =
|
|
tex.get_texture_pixel(x, tex.base_y + u + gmod(y - tex.base_y - u, tty - u - u));
|
|
}
|
|
}
|
|
|
|
void pick_textures() {
|
|
if(earth_textures.empty()) return;
|
|
bool first = !isize(textures_to_use);
|
|
auto last = first ? 0 : textures_to_use.back().to;
|
|
if(first || current.shift > last) {
|
|
auto et = &(earth_textures[hrand(isize(earth_textures))]);
|
|
textures_to_use.emplace_back();
|
|
auto& tu = textures_to_use.back();
|
|
auto& tex = et->tex;
|
|
ld ratio = tex.tx * 1. / tex.ty;
|
|
ld length = M_PI * ratio + 6;
|
|
ld t = first ? 0 : last + lerp(1, 3, randd()) + length;
|
|
tu.ctr = t;
|
|
tu.from = t - length;
|
|
tu.to = t + length;
|
|
tu.tx = et;
|
|
}
|
|
}
|
|
|
|
ld smoothstep(ld x) {
|
|
if(x < 0) return 0;
|
|
if(x > 1) return 1;
|
|
return x * x * (3-2*x);
|
|
}
|
|
|
|
string copyright_shown;
|
|
|
|
void draw_texture(texture_to_use& tu) {
|
|
if(!talpha) return;
|
|
auto& et = *tu.tx;
|
|
auto& tex = et.tex;
|
|
|
|
if(!et.loaded) {
|
|
et.loaded = true;
|
|
tex.loadTextureGL();
|
|
et.tinf.texture_id = tex.textureid;
|
|
}
|
|
et.tinf.tvertices.clear();
|
|
|
|
ld MWIDTH = tex.tx * .5 / tex.ty;
|
|
|
|
array<hyperpoint, 3> pts;
|
|
int pts_id = 0;
|
|
|
|
auto add = [&] (int x, int y) {
|
|
ld x0 = (y-(YSCALE/2.)) / YSCALE * M_PI * 4;
|
|
ld mercator_y0 = (x-(XSCALE/2.)) / (XSCALE/2.) * M_PI * MWIDTH;
|
|
ld y0 = asin(tanh(2 * mercator_y0));
|
|
ld y1 = y0 - 90 * degree;
|
|
|
|
et.tinf.tvertices.push_back(glhr::makevertex(x * 1. / XSCALE, .5 + (y-0.5) / MWIDTH / YSCALE, 0));
|
|
|
|
cross_result cr;
|
|
if(1) {
|
|
dynamicval<eGeometry> g(geometry, gSpace435);
|
|
ld s = current.shift - tu.ctr;
|
|
|
|
// We actually want to compute this, but this is not precise enough:
|
|
// cr = ds_cross0(current.T * lorentz(2, 3, -current.shift) * cspin(0, 1, x0) * cspin(0, 2, y0 - 90*degree));
|
|
|
|
// Here is what we get for current.T == Id: (computed with sympy)
|
|
hyperpoint now;
|
|
ld ts = tanh(s) * tanh(s);
|
|
ld cy = cos(y1) * cos(y1);
|
|
ld sq = sqrt(1 - cy * ts);
|
|
now[0] = sin(y1) * cos(x0) / sq;
|
|
now[1] = -sin(x0) * sin(y1) / sq;
|
|
now[2] = cos(y1) / cosh(s) / sq;
|
|
now[3] = 0;
|
|
|
|
// And here is the derivative over t (t = the local variable from ds_cross0)
|
|
hyperpoint der;
|
|
sq = -sqrt(2)*tanh(s)/(4*sqrt(-cos(2*y1)*ts - ts + 2));
|
|
der[0] = sq*(sin(x0 - 2*y1) - sin(x0 + 2*y1));
|
|
der[1] = sq*(cos(x0 - 2*y1) - cos(x0 + 2*y1));
|
|
sq = sqrt(-cy*ts + 1);
|
|
der[2] = (cy - 1)*sinh(s)/sq;
|
|
der[3] = -(cy*sinh(s)*tanh(s) - cosh(s))/sq;
|
|
|
|
cr.h = now;
|
|
|
|
// now and der give us our wordline shifted to roughly the time of interest, so we can now use ds_cross0 safely
|
|
transmatrix U = Id;
|
|
set_column(U, 2, now);
|
|
set_column(U, 3, der);
|
|
cr = ds_cross0(current.T * U);
|
|
}
|
|
|
|
curvepoint(cr.h);
|
|
cr.h[2]++; cr.h /= cr.h[2];
|
|
pts[pts_id++] = cr.h;
|
|
|
|
if(pts_id == 3) {
|
|
ld area = (pts[0] ^ pts[1])[2] + (pts[1] ^ pts[2])[2] + (pts[2] ^ pts[0])[2];
|
|
if(area < 0) { et.tinf.tvertices.resize(et.tinf.tvertices.size()-3); curvedata.resize(curvedata.size()-3); }
|
|
pts_id = 0;
|
|
}
|
|
};
|
|
|
|
for(int x=0; x<XSCALE; x++)
|
|
for(int y=0; y<YSCALE; y++) {
|
|
add(x, y);
|
|
add(x+1, y);
|
|
add(x, y+1);
|
|
add(x, y+1);
|
|
add(x+1, y);
|
|
add(x+1, y+1);
|
|
}
|
|
|
|
color_t col = 0xFFFFFFFF;
|
|
part(col, 0) = talpha;
|
|
part(col, 0) *= smoothstep(current.shift - tu.from);
|
|
part(col, 0) *= smoothstep(tu.to - current.shift);
|
|
|
|
|
|
auto& poly = queuecurve(shiftless(Id), 0, col, PPR::FLOOR);
|
|
poly.tinf = &et.tinf;
|
|
poly.flags |= POLY_TRIANGLES;
|
|
poly.offset_texture = 0;
|
|
|
|
copyright_shown = et.copyright;
|
|
}
|
|
|
|
void draw_textures() {
|
|
pick_textures();
|
|
copyright_shown = "";
|
|
for(auto& tu: textures_to_use)
|
|
if(current.shift > tu.from && current.shift < tu.to)
|
|
draw_texture(tu);
|
|
}
|
|
|
|
}}
|