fix(renderings): Avoid too-thin books from rendering inside-out

sile-typesetter · Jan 5, 2021 · 8f0e595 · 8f0e595
1 parent 7cec966
commit 8f0e595
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Showing 2 changed files with 3 additions and 2 deletions.
diff --git a/rules/functions.mk b/rules/functions.mk
@@ -298,6 +298,7 @@ define povray ?=
 		#declare Rand1 = seed(1234);
 		#declare Rand2 = seed(4123);
 		#declare Rand3 = seed(2134);
+		#declare MinThickness = 0.005;
 	EOF
 	sleep 1.$${RANDOM} # block parallel execution
 	while $(PGREP) povray > /dev/null; do sleep 2.$${RANDOM}; done

diff --git a/rules/rules.mk b/rules/rules.mk
@@ -1149,7 +1149,7 @@ $(BOOKSCENESINC): %.inc: $$(geometryfile) %-pov-$(_front).png %-pov-$(_back).png
 		#declare CoilWidth = $(COILWIDTH);
 		#declare CoilColor = $(COILCOLOR);
 		#declare PaperWeight = $(PAPERWEIGHT);
-		#declare BookThickness = $${spinemm} / $${pagewmm} / 2;
+		#declare BookThickness = max($${spinemm} / $${pagewmm} / 2, MinThickness);
 		#declare HalfThick = BookThickness / 2;
 	EOF
 
@@ -1160,7 +1160,7 @@ $(BOOKSCENES): %-$(_3d).pov: $$(geometryfile) %.inc
 		#declare DefaultBook = "$(filter %.inc,$^)";
 		#declare Lights = $(call scale,8,2);
 		#declare BookAspect = $${pagewmm} / $${pagehmm};
-		#declare BookThickness = $${spinemm} / $${pagewmm} / 2;
+		#declare BookThickness = max($${spinemm} / $${pagewmm} / 2, MinThickness);
 		#declare HalfThick = BookThickness / 2;
 		#declare toMM = 1 / $${pagehmm};
 	EOF