# Makefile (for gnumake) to translate OBJ files to Radiance octree representing
# an exemplary model of a cellular office (one work desk with small meeting
# desk) as a realistic setting for daylight simulation.

# Modelling and assignment of material names in Blender, export to Wavefront OBJ.
# Furniture is modelled by collections in Blender with marker triangles for
# replmarks, these get material <object>Marker with <object>.obj being the file-
# name of the exported, detailed geometry. The latter are exported with the main
# model but mapped to void by obj2rad.

# Oct 2020, Lars O. Grobe <larsoliver.grobe@hslu.ch>
# Lucerne University of Applied Sciences and Arts HSLU, Switzerland

# This work is licensed under a Creative Commons Attribution 4.0 International
# License: https://creativecommons.org/licenses/by/4.0/

# Begin model configuration ====================================================

# Name of this model, will be used to name scene files
name = Cellular

# Switch artificial lighting on (<0) or off (=0)
export lighting=0

# Glazing definition
# Overwrite default (red, green, blue) properties of window groups by defining
# wgTopMat, wgMiddleMat, wgBottoMat and point variable to the file here
glazingMat = glazingMatDef.mat

# Sky definition
# Overwrite default by given file
sky = skies/skyDef.sky

# Radiance object files to be included by xform (use only for simple geometries)
objects = desk.rad locker.rad sideBoard.rad lamp.rad workstation.rad

# Radiance meshes to be compiled from Wavefront OBJs
meshes = chair1.rtm chair2.rtm poster1.rtm poster2.rtm

# window group descriptions for e.g. Three Phase Method
windowGroups = wgTop.rad wgMiddle.rad wgBottom.rad

# Number of processort cores / parallel processes to fork
NCPU=1

# End model configuration ======================================================

# Main scene file, may contain triangular markers processed by replmarks
octree = $(name).oct
blackOctree = $(name)Black.oct
scene = $(name).rad
ambfile = $(name).amb
unffile = $(name).unf

# render settings for test
rvuopt = -n $(NCPU)  -ab 2 -ad 1024 -as 512 -aa .15 -st 0 -ss 16 -lw 2e-3

# render settings for unfiltered HDR
rtpictopt = -n $(NCPU) -ab 3 -ad 2048 -as 1024 -aa .1 -st 0 -ss 16 -lw 1e-4 -af $(ambfile) -x 2400 -y 2400

# markers must be have modifier name <mesh>Marker, where <mesh> is the basenam
# of the compiled mesh (without suffix .rtm)
meshMarkers := $(foreach mesh, $(meshes),-I $(mesh) $(subst .rtm,Marker,$(mesh)))
objectMarkers := $(foreach object, $(objects),-x $(object) $(subst .rad,Marker,$(object)))
replmarksStr = $(meshMarkers) $(objectMarkers)

# Complete RAYPATH variable
myRAYPATH = $(RAYPATH):$(glazingPath)

vpath %.obj obj   # Wavefront OBJ files
vpath %.map mat   # Mapping from Wavefront materials to Radiance modifiers
vpath %.mat mat   # Radiance modifiers
vpath %.sky skies # Sky desciptions
vpath %.vf  vf    # View descriptions

# recipes from here
.PHONY: clean debug octree

# default target
debug : fisheye.vf $(octree)
	RAYPATH=$(myRAYPATH); rvu $(rvuopt) -vf $^

octree : $(octree)

blackOctree : $(blackOctree)

windowGroups : $(windowGroups)

unf : fisheye.vf $(octree)
	RAYPATH=$(myRAYPATH); rtpict $(rtpictopt) -x 64 -y 64 -vf $^ > /dev/null
	RAYPATH=$(myRAYPATH); rtpict $(rtpictopt) -vf $^ > $(unffile)

# Convert scene and replace markers by objects or meshes
$(scene) : %.rad : %.mat $(glazingMat) %.map %.obj $(meshes) $(objects)
	cat $< $(word 2, $^) > $@
	obj2rad -m $(word 3, $^) $(word 4, $^) | replmarks $(replmarksStr) >> $@

# Extract window group descriptions from OBJ
$(windowGroups) : %.rad : $(glazingMat) %.map $(name).obj
	echo '#@rfluxmtx u=Z h=kf' > $@
	cat $< >> $@
	obj2rad -m $(word 2, $^) $(word 3, $^) >> $@

# Map file per window group
%.map :
	echo "void ;" > $@
	echo $(subst .map,Mat,$@) '(Material "'$(subst .map,Mat,$@)'");' >> $@

# Convert Wavefront OBJs to Radiance meshes
%.rtm : %.mat %.obj
	obj2mesh -w -a $^ $@

# Convert Wavefront OBJs to Radiance objects
$(objects) : %.rad : %.mat %.obj
	cat $< > $@
	obj2rad  $(lastword $^) >> $@

# Compile scene into octree
$(octree) : $(scene) $(sky)
	oconv $^ > $@

$(blackOctree) : $(scene) $(windowGroups)
		RAYPATH=$$RAYPATH:.; echo "void plastic blackMat 0 0 5 0 0 0 0 0" | cat - $^ | \
	  xform -c -m blackMat | oconv - > $@

clean :
	rm -f $(meshes) $(objects) $(scene) $(octree) $(ambfile) $(windowGroups) $(foreach wg, $(windowGroups), $(subst .rad,.map,$(wg) ) )