From 175c061ab49507879a7563bcb4a601dcd3aac99d Mon Sep 17 00:00:00 2001
From: Zeno Rogue <zeno@attnam.com>
Date: Mon, 13 May 2019 09:34:22 +0200
Subject: [PATCH] 2d3d:: shadows

---
 3d-models.cpp | 17 +++++++++++++++++
 graph.cpp     | 12 +++++++++++-
 hyper.h       |  1 +
 3 files changed, 29 insertions(+), 1 deletion(-)

diff --git a/3d-models.cpp b/3d-models.cpp
index 0ca74e80..7212b836 100644
--- a/3d-models.cpp
+++ b/3d-models.cpp
@@ -828,6 +828,12 @@ void queueball(const transmatrix& V, ld rad, color_t col, eItem what) {
     }
   }
 
+void make_shadow(hpcshape& sh) {
+  sh.shs = isize(hpc);
+  for(int i=sh.s; i < sh.e; i++) hpcpush(orthogonal_move(hpc[i], geom3::FLOOR - geom3::human_height / 100));
+  sh.she = isize(hpc);
+  }
+
 void make_3d_models() {
   if(DIM == 2) return;
   DEBBI(DF_POLY, ("make_3d_models"));
@@ -838,6 +844,17 @@ void make_3d_models() {
     utt.tvertices.clear();
     utt.texture_id = floor_textures->renderedTexture;
     }
+  
+  if(WDIM == 2) {
+    DEBB(DF_POLY, ("shadows"));
+    for(hpcshape* sh: {&shBatWings, &shBugBody, &shBullBody, &shButterflyWing, &shCatBody, &shDogBody, &shDogTorso,
+      &shEagle, &shFemaleBody, &shFlailMissile, &shGadflyWing, &shGargoyleWings, &shHawk, &shJiangShi, &shKnife,
+      &shPBody, &shPHead, &shRaiderBody, &shReptileBody, &shSkeletonBody, &shTongue, &shTrapArrow, &shTrylobite,
+      &shWaterElemental, &shWolfBody, &shYeti})
+      make_shadow(*sh);
+    
+    for(int i=0; i<8; i++) make_shadow(shAsteroid[i]);
+    }
     
   DEBB(DF_POLY, ("humanoids"));
   make_humanoid_3d(shPBody);
diff --git a/graph.cpp b/graph.cpp
index c830203a..889836d5 100644
--- a/graph.cpp
+++ b/graph.cpp
@@ -563,6 +563,16 @@ bool noshadow;
 
 #if CAP_SHAPES
 void ShadowV(const transmatrix& V, const hpcshape& bp, PPR prio) {
+  if(WDIM == 2 && GDIM == 3 && bp.shs != bp.she) {
+    auto& p = queuepolyat(V, bp, 0x18, PPR::TRANSPARENT); 
+    p.outline = 0;
+    p.subprio = -100;
+    p.offset = bp.shs;
+    p.cnt = bp.she - bp.shs;
+    p.flags &=~ POLY_TRIANGLES;
+    p.tinf = NULL;
+    return;
+    }
   if(mmspatial) { 
     if(model_needs_depth() || noshadow) 
       return; // shadows break the depth testing
@@ -5177,7 +5187,7 @@ void drawcell(cell *c, transmatrix V, int spinv, bool mirrored) {
 
         int fd0 = fd ? fd-1 : 0;      
         if(WDIM == 2 && GDIM == 3 && qfi.fshape)
-          draw_shapevec(c, V, qfi.fshape->levels[SIDE_LAKE], darkena3(fcol, fd0, 0x80), PPR::TRANSPARENT), ptds.back()->subprio = c->cpdist * 4;
+          draw_shapevec(c, V, qfi.fshape->levels[SIDE_LAKE], darkena3(fcol, fd0, 0x80), PPR::TRANSPARENT), ptds.back()->subprio = -200;
         else
           draw_qfi(c, (*Vdp), darkena(fcol, fd0, 0x80), PPR::LAKELEV);
         }
diff --git a/hyper.h b/hyper.h
index 097fb700..dbed4ff0 100644
--- a/hyper.h
+++ b/hyper.h
@@ -4045,6 +4045,7 @@ struct hpcshape {
   hyperpoint intester;
   basic_textureinfo *tinf;
   int texture_offset;
+  int shs, she;
   };
 
 extern hpcshape shFullCross[2];