From a4579e95c125a4003e122c05353b02a76a2966f7 Mon Sep 17 00:00:00 2001
From: Zeno Rogue <zeno@attnam.com>
Date: Fri, 13 Sep 2019 09:35:18 +0200
Subject: [PATCH] added qtm to RogueViz

---
 rogueviz/qtm.cpp      | 91 +++++++++++++++++++++++++++++++++++++++++++
 rogueviz/rogueviz.cpp |  1 +
 2 files changed, 92 insertions(+)
 create mode 100644 rogueviz/qtm.cpp

diff --git a/rogueviz/qtm.cpp b/rogueviz/qtm.cpp
new file mode 100644
index 00000000..d112b5c1
--- /dev/null
+++ b/rogueviz/qtm.cpp
@@ -0,0 +1,91 @@
+#include "../hyper.h"
+
+// Copyright (C) 2011-2019 Zeno Rogue, see 'hyper.cpp' for details
+
+/*
+
+3D engines often represent rotations as unit quaternions. These form a three-dimensional elliptic space. What if we could fly through it?
+
+Lower left corner shows the rotation matching the current camera position. Beams in the rotation space correspond to bumps on the sphere.
+
+Run like:
+[hyper] -geo 2 -rotspace -rot_uscale 0.25 -qtm (space of rotations of the sphere)
+[hyper] -rotspace -rot_uscale 0.25 -qtm (space of rotations of the hyperbolic plane, slow)
+[hyper] -geo Nil -qtm (Nil, which is not a space of rotations, but similar; rendered in a similar way)
+
+*/
+
+namespace hr {
+
+namespace hybrid { extern hrmap *pmap; }
+
+color_t rcolor() {
+  color_t res;
+  part(res, 0) = hrand(0x80);
+  part(res, 1) = hrand(256);
+  part(res, 2) = hrand(0x80) + 128;
+  swap(part(res, 1), part(res, rand() % 2));
+  swap(part(res, 2), part(res, rand() % 3));
+  return res;
+  }
+  
+void set_cell(cell *c) {
+  if(hybri) {
+    cell *c1 = hybrid::get_where(c).first;
+    if(c1->land != laHive) hybrid::in_underlying_map([&] { set_cell(c1); });
+    c->land = c1->land;
+    c->wall = c1->wall;
+    c->landparam = c1->landparam;
+    c->item = itNone;
+    c->monst = moNone;
+    }
+  else {
+    if(c->land == laHive) return;
+    color_t col;
+    if(hyperbolic)
+      col = rcolor();
+    else if(nil) {
+      part(col, 0) = 128 + c->master->zebraval * 50;
+      part(col, 1) = 128 + c->master->emeraldval * 50;
+      part(col, 2) = 255;
+      }
+    else {
+      hyperpoint h = calc_relative_matrix(c, currentmap->gamestart(), C0) * C0;
+      part(col, 0) = (h[0] * 127.5 + 127.5);
+      part(col, 1) = (h[1] * 127.5 + 127.5);
+      part(col, 2) = (h[2] * 127.5 + 127.5);
+      }
+    c->landparam = col;
+    c->land = laHive;
+    c->wall = (nil ? (c->master->zebraval & c->master->emeraldval & 1) : pseudohept(c)) ? waWaxWall : waNone;
+    c->item = itNone;
+    c->monst = moNone;
+    }
+  }
+
+bool qtm_on;
+
+bool may_set_cell(cell *c, const transmatrix& T) {
+  if(qtm_on) set_cell(c);
+  return false;
+  }
+
+int args() {
+  using namespace arg;
+           
+  if(0) ;
+  else if(argis("-qtm")) {
+    PHASEFROM(2);
+    qtm_on = true;
+    }
+
+  else return 1;
+  return 0;
+  }
+
+
+
+auto magichook = addHook(hooks_drawcell, 100, may_set_cell)
+  + addHook(hooks_args, 100, args);
+
+}
diff --git a/rogueviz/rogueviz.cpp b/rogueviz/rogueviz.cpp
index d3d81744..6cd380ab 100644
--- a/rogueviz/rogueviz.cpp
+++ b/rogueviz/rogueviz.cpp
@@ -2475,3 +2475,4 @@ auto hooks  =
 #include "cvl.cpp"
 #include "newconf.cpp"
 #include "grigorchuk.cpp"
+#include "qtm.cpp"