Lunatic: add some shade/vis debugging functions.

engine.lua: linearizeBasePal(), mapster32 only
test/shadexfog.lua: create_depth_shtab(), create_vismarker_shtab()

git-svn-id: https://svn.eduke32.com/eduke32@4404 1a8010ca-5511-0410-912e-c29ae57300e0

polymer/eduke32/source/lunatic/engine.lua

@@ -6,6 +6,7 @@ local bcarray = require("bcarray")
 
 local assert = assert
 local error = error
+local ipairs = ipairs
 local type = type
 
 local decl = assert(decl)  -- comes from above (defs.ilua or defs_m32.lua)
@@ -397,6 +398,27 @@ if (ismapster32) then
             end
         end
     end
+
+    function engine.linearizeBasePal()
+        for _, begi in ipairs{0, 32, 96, 160} do
+            local ptr = C.basepaltable[0] + 3*begi
+            local refcol = ptr + 3*31
+
+            for i=0,30 do
+                for c=0,2 do
+                    ptr[3*i + c] = i*refcol[c]/31
+                end
+            end
+        end
+
+        for _, begi in ipairs{128, 144, 192, 208, 224} do
+            local ptr = C.basepaltable[0] + 3*begi
+
+            for i=0,3*15+2 do
+                ptr[i] = 0
+            end
+        end
+    end
 end
 
 

polymer/eduke32/source/lunatic/test/shadexfog.lua

@@ -133,6 +133,36 @@ end
 
 ---------- BASE SHADE TABLE TESTS ----------
 
+-- sht = shadexfog.create_depth_shtab([palnum])
+function shadexfog.create_depth_shtab(palnum)
+    local sht = engine.shadetab()
+
+    for s=0,31 do
+        for i=0,255 do
+            sht[s][i] = s
+        end
+    end
+
+    if (palnum) then
+        engine.setshadetab(palnum, sht)
+    end
+    return sht
+end
+
+function shadexfog.create_vismarker_shtab(palnum)
+    local sht = engine.getshadetab(0)
+
+    for i=0,255 do
+        sht[1][i] = 242
+        sht[30][i] = 245
+    end
+
+    if (palnum) then
+        engine.setshadetab(palnum, sht)
+    end
+    return sht
+end
+
 -- Basic test of whether for a color index i corresponding to a color (r,g,b),
 -- getclosestcol() returns a color index ii corresponding to the same color.
 -- (In the Duke3D palette, there are duplicates, so the requirement i==ii is