### William Schilthuis
### WilliamGS.com
### http://www.sfdm.scad.edu/faculty/mkesson/vsfx319/index.html
### spring 2009

### Renderman Archive
### Matrix Composition

### Part 2 of 6
### Description:
### Prepass Ambient Occlusion
### Use this to bake out AO point cloud
### 
### uncomment appropriate lines to render the
### image for displacment occlusion, which is
### just a cool effect.
###

Option "searchpath" "shader" "@:../shaders"
Option "searchpath" "texture" "../textures"
Option "searchpath" "archive" "../archives:Cutter_Help/templates/Rib:custom_templates/Rib"

	DisplayChannel "float _area"
#	Display "wgs_matrix_rook_AOprepass" "it" "rgba" #use this to test camera

	Format 512 512 1
	Projection "perspective" "fov" 36 #38* is all.	2* is really close
	ShadingRate 0.2

	Translate  0.0 0 15
	Rotate -90 1 0 0
	Rotate 00  0 1 0
	Scale 1 1 -1

WorldBegin
		Attribute "visibility" "trace" [1]	# use to test AO

		Attribute "cull" "hidden" 0
		Attribute "cull" "backfacing" 0
		Attribute "dice" "rasterorient" 0
#		hide ptc shader and use occlude to test camera composition
		Surface "bakeAreas" "bakename" ["/stuhome/vsfx319/textures/wgs_matrix_rook_AO.ptc"] #linux
#		Surface "bakeAreas" "bakename" ["M:/vsfx319/textures/wgs_matrix_rook_AO.ptc"] 	#windows
#		Surface "rtOcclude" "samples" [256]	#use to test AO
	AttributeBegin	#SCENE GROUP
		TransformBegin
#			ReadArchive "cutrAxes.rib"
#			Surface "rtOcclude" "samples" [256]	#use to test AO
			Scale 10 10 10
			Polygon "P" [-0.5 0 -0.5  -0.5 0 0.5  0.5 0 0.5  0.5 0 -0.5]
					"st" [0 0  0 1  1 1  1 0]
		TransformEnd
	AttributeEnd	

	AttributeBegin	#COMPOSITION GROUP
#			Surface "rtOcclude" "samples" [256]	#use to test AO
#			Surface "plastic"	#use for AO displace bake
		ReadArchive "wgs_matrix_rook_compositiongroup_archive.rib"
	AttributeEnd
WorldEnd



#execute the next line to generate AO texture map
#txmake ../textures/wgs_matrix_rook_AO.tif ../textures/wgs_matrix_rook_AO.tex