3 files changed, 80 insertions, 0 deletions
diff --git a/metapost/context/base/mpiv/mp-luas.mpiv b/metapost/context/base/mpiv/mp-luas.mpiv
index c30798247..c7c97228e 100644
--- a/metapost/context/base/mpiv/mp-luas.mpiv
+++ b/metapost/context/base/mpiv/mp-luas.mpiv
@@ -97,3 +97,5 @@ enddef ;
 vardef MP@#(text t) =
     mlib_luas_lualist("MP." & str @#,t)
 enddef ;
+
+def message = lua.mp.report enddef ;
diff --git a/metapost/context/base/mpiv/mp-mlib.mpiv b/metapost/context/base/mpiv/mp-mlib.mpiv
index a4541ae2d..ea148d0c1 100644
--- a/metapost/context/base/mpiv/mp-mlib.mpiv
+++ b/metapost/context/base/mpiv/mp-mlib.mpiv
@@ -585,6 +585,7 @@ primarydef p withshademethod m =
     hide(mfun_with_shade_method_analyze(p))
     p
     withprescript "sh_domain=0 1"
+    withprescript "sh_transform=yes"
     withprescript "sh_color=into"
     withprescript "sh_color_a=" & colordecimals white
     withprescript "sh_color_b=" & colordecimals black
@@ -611,6 +612,16 @@ primarydef p withshademethod m =
     fi
 enddef ;
 
+def withshaderadius expr a =
+    withprescript "sh_radius_a=" & decimal (xpart a)
+    withprescript "sh_radius_b=" & decimal (ypart a)
+enddef ;
+
+def withshadeorigin expr a =
+    withprescript "sh_center_a=" & ddecimal a
+    withprescript "sh_center_b=" & ddecimal a
+enddef ;
+
 def withshadevector expr a =
     withprescript "sh_center_a=" & ddecimal (point xpart a of mfun_shade_path)
     withprescript "sh_center_b=" & ddecimal (point ypart a of mfun_shade_path)
@@ -621,6 +632,10 @@ def withshadedirection expr a =
     withprescript "sh_center_b=" & ddecimal (point ypart a of boundingbox(mfun_shade_path))
 enddef ;
 
+def withshadetransform expr a = % yes | no
+    withprescript "sh_transform=" & a
+enddef ;
+
 pair shadedup    ; shadedup    := (0.5,2.5) ;
 pair shadeddown  ; shadeddown  := (2.5,0.5) ;
 pair shadedleft  ; shadedleft  := (1.5,3.5) ;
@@ -690,10 +705,47 @@ def shaded text s =
     s
 enddef ;
 
+% For me.
+
+primarydef p shownshadevector v =
+    image (
+        drawarrow (point xpart v of p) -- (point ypart v of p) ;
+        fill fullcircle scaled 2 shifted point xpart v of p ;
+        setbounds currentpicture to center currentpicture -- cycle ;
+    )
+enddef ;
+
+primarydef p shownshadedirection v =
+    image (
+        drawarrow (point xpart v of boundingbox p) -- (point ypart v of boundingbox p) ;
+        fill fullcircle scaled 2 shifted (point xpart v of boundingbox p) ;
+        setbounds currentpicture to center currentpicture -- cycle ;
+    )
+enddef ;
+
+primarydef p shownshadecenter v =
+    image (
+        fill fullcircle scaled 2
+            shifted center p shifted (
+            xpart v * bbwidth (p)/2,
+            ypart v * bbheight(p)/2
+        ) ;
+        setbounds currentpicture to center currentpicture -- cycle ;
+    )
+enddef ;
+
+primarydef p shownshadeorigin v =
+    image (
+        fill fullcircle scaled 2 shifted v ;
+        setbounds currentpicture to center currentpicture -- cycle ;
+    )
+enddef ;
+
 % Old macros:
 
 def withcircularshade (expr a, b, ra, rb, ca, cb) =
     withprescript "sh_type=circular"
+    withprescript "sh_transform=yes"
     withprescript "sh_domain=0 1"
     withprescript "sh_factor=1"
     withprescript "sh_color_a="  & colordecimals ca
@@ -706,6 +758,7 @@ enddef ;
 
 def withlinearshade (expr a, b, ca, cb) =
     withprescript "sh_type=linear"
+    withprescript "sh_transform=yes"
     withprescript "sh_domain=0 1"
     withprescript "sh_factor=1"
     withprescript "sh_color_a="  & colordecimals ca
@@ -1530,6 +1583,9 @@ vardef formatted(expr f, x) = textext(varfmt(f, x)) enddef ;
 % def strfmt = format    enddef ; % old
 % def varfmt = formatted enddef ; % old
 
+
+def fmttext = lua.mp.formatted enddef ;
+
 % new
 
 def fillup   text t = draw t withpostscript "both"    enddef ; % we use draw because we need the proper boundingbox
diff --git a/metapost/context/base/mpiv/mp-tool.mpiv b/metapost/context/base/mpiv/mp-tool.mpiv
index 4922d5075..220a7b6a9 100644
--- a/metapost/context/base/mpiv/mp-tool.mpiv
+++ b/metapost/context/base/mpiv/mp-tool.mpiv
@@ -1246,6 +1246,15 @@ vardef arrowheadonpath (expr p, s) =
     arrowhead p if s < 1 : cutafter (point (s*arclength(p) + (ahlength/2)) on p) fi
 enddef ;
 
+def resetarrows =
+    hide (
+        ahlength  :=  4 ;
+        ahangle   := 45 ;
+        ahvariant := 0 ;
+        ahdimple  := 1/5 ;
+    )
+enddef ;
+
 %D Points.
 
 def drawpoint expr c =
@@ -2811,4 +2820,17 @@ enddef;
 
 extra_endfig := extra_endfig & "mfun_apply_max_dimensions ;" ;
 
+%D Bonus shapes (need along):
+
+path unittriangle, fulltriangle ; % not really units but circle based
+
+unittriangle := point 0   along unitcircle
+             -- point 1/3 along unitcircle
+             -- point 2/3 along unitcircle
+             -- cycle ;
+fulltriangle := point 0   along fullcircle
+             -- point 1/3 along fullcircle
+             -- point 2/3 along fullcircle
+             -- cycle ;
+
 let dump = relax ;