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render_exporter.py
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import bpy
import bmesh
import os
import math
from math import *
import mathutils
from mathutils import Vector
import shutil
import struct
# Simple wrapper on IO to handle indentation
class PBRTWriter:
def __init__(self, file):
self.indent = ''
self.file = open(file, 'w')
def write(self, s):
self.file.write(self.indent)
self.file.write(s)
def inc_indent(self):
self.indent = self.indent + '\t'
def dec_indent(self):
self.indent = self.indent[:-1]
def attr_begin(self):
self.write("AttributeBegin\n")
self.inc_indent()
def attr_end(self):
self.dec_indent()
self.write("AttributeEnd\n")
def close(self):
self.file.close()
def objects_in_render(scene):
return [ob for ob in scene.objects if not ob.hide_render]
def write_ply(file, mesh, indices, normals, i):
# Pack U,V
uvs = []
for uv_layer in mesh.uv_layers:
for tri in mesh.loop_triangles:
if tri.material_index == i:
for loop_index in tri.loops:
uvs.append((
uv_layer.data[loop_index].uv[0],
uv_layer.data[loop_index].uv[1]
))
out = open(file, 'w')
out.write("ply\n")
out.write("format binary_little_endian 1.0\n")
out.write(f"element vertex {len(indices)}\n")
out.write("property float x\n")
out.write("property float y\n")
out.write("property float z\n")
out.write("property float nx\n")
out.write("property float ny\n")
out.write("property float nz\n")
# TODO: Check UV have same size than indices, normals
if len(uvs) != 0:
out.write("property float u\n")
out.write("property float v\n")
out.write(f"element face {len(indices) // 3}\n")
# TODO: Check size and switch to proper precision
out.write("property list uint int vertex_indices\n")
out.write("end_header\n")
# Now switch to binary writing
out.close()
out = open(file, "ab")
# Position & Normals & UVs
for (id,(id_vertex,n)) in enumerate(zip(indices, normals)):
out.write(struct.pack('<f', mesh.vertices[id_vertex].co.x))
out.write(struct.pack('<f', mesh.vertices[id_vertex].co.y))
out.write(struct.pack('<f', mesh.vertices[id_vertex].co.z))
out.write(struct.pack('<f', n[0]))
out.write(struct.pack('<f', n[1]))
out.write(struct.pack('<f', n[2]))
if len(uvs) != 0:
out.write(struct.pack('<f', uvs[id][0]))
out.write(struct.pack('<f', uvs[id][1]))
# Indices
for i in range(0, len(indices), 3):
out.write(struct.pack('<I', 3))
out.write(struct.pack('<I', i))
out.write(struct.pack('<I', i+1))
out.write(struct.pack('<I', i+2))
out.close()
#render engine custom begin
class PBRTRenderEngine(bpy.types.RenderEngine):
bl_idname = 'PBRT_Renderer'
bl_label = 'PBRT_Renderer'
bl_use_preview = False
bl_use_material = True
bl_use_shading_nodes = False
bl_use_shading_nodes_custom = False
bl_use_texture_preview = True
bl_use_texture = True
def render(self, scene):
self.report({'ERROR'}, "Use export function in PBRT panel.")
from bl_ui import properties_render
from bl_ui import properties_material
for member in dir(properties_render):
subclass = getattr(properties_render, member)
try:
subclass.COMPAT_ENGINES.add('PBRT_Renderer')
except:
pass
for member in dir(properties_material):
subclass = getattr(properties_material, member)
try:
subclass.COMPAT_ENGINES.add('PBRT_Renderer')
except:
pass
bpy.utils.register_class(PBRTRenderEngine)
#Camera code:
#https://blender.stackexchange.com/questions/16472/how-can-i-get-the-cameras-projection-matrix
def measure(first, second):
locx = second[0] - first[0]
locy = second[1] - first[1]
locz = second[2] - first[2]
distance = sqrt((locx)**2 + (locy)**2 + (locz)**2)
return distance
def export_spot_lights(pbrt_file, scene):
for ob in objects_in_render(scene):
print('OB TYPE: ' + ob.type)
if ob.type == "LIGHT" :
la = ob.data
print('Light type: ' + la.type)
if la.type == "SPOT" :
print('\n\nexporting light: ' + la.name + ' - type: ' + la.type)
from_point=ob.matrix_world.col[3]
at_point=ob.matrix_world.col[2]
at_point=at_point * -1
at_point=at_point + from_point
pbrt_file.attr_begin()
pbrt_file.write(" LightSource \"spot\"\n \"point from\" [%s %s %s]\n \"point to\" [%s %s %s]\n" % (from_point.x, from_point.y, from_point.z,at_point.x, at_point.y, at_point.z))
#TODO: Parse the values from the light \ color and so on. also add falloff etc.
pbrt_file.write("\"blackbody I\" [5500 125]\n")
pbrt_file.write("AttributeEnd\n\n")
return ''
def export_point_lights(pbrt_file, scene):
for object in objects_in_render(scene):
if object.type == "LIGHT" :
la = object.data
print('Light type: ' + la.type)
if la.type == "POINT" :
print('\n\nexporting lamp: ' + object.name + ' - type: ' + object.type)
print('\nExporting point light: ' + object.name)
pbrt_file.attr_begin()
from_point=object.matrix_world.col[3]
pbrt_file.write("Translate\t%s %s %s\n" % (from_point.x, from_point.y, from_point.z))
pbrt_file.write("LightSource \"point\"\n\"rgb I\" [%s %s %s]\n" % (bpy.data.objects[object.name].color[0], bpy.data.objects[object.name].color[1], bpy.data.objects[object.name].color[2]))
pbrt_file.attr_end()
pbrt_file.write("\n\n")
return ''
def export_camera(pbrt_file):
print("Fetching camera..")
cam_ob = bpy.context.scene.camera
if cam_ob is None:
print("no scene camera,aborting")
self.report({'ERROR'}, "No camera in scene, aborting")
elif cam_ob.type == 'CAMERA':
print("regular scene cam")
print("render res: ", bpy.data.scenes['Scene'].render.resolution_x , " x ", bpy.data.scenes['Scene'].render.resolution_y)
print("Exporting camera: ", cam_ob.name)
pbrt_file.write("Scale -1 1 1 #avoid the 'flipped image' bug..\n")
# https://blender.stackexchange.com/questions/13738/how-to-calculate-camera-direction-and-up-vector/13739#13739
# https://www.randelshofer.ch/jpbrt/javadoc/org/jpbrt/io/package-summary.html#Cameras
# https://blender.stackexchange.com/questions/16493/is-there-a-way-to-fit-the-viewport-to-the-current-field-of-view
# https://blender.stackexchange.com/questions/16472/how-can-i-get-the-cameras-projection-matrix
# https://github.com/Volodymyrk/pbrtMayaPy/blob/master/PBRT/ExportModules/Camera.py
# https://github.com/mmp/pbrt-v2/blob/master/exporters/blender/pbrtBlend.py
# https://blenderartists.org/forum/showthread.php?268039-Converting-camera-orientation-to-up-vector-and-line-of-sight-vector
cameramatrix = cam_ob.matrix_world.copy()
matrixTransposed = cameramatrix.transposed()
up_point = matrixTransposed[1]
from_point=cam_ob.matrix_world.col[3]
at_point=cam_ob.matrix_world.col[2]
at_point=at_point * -1
at_point=at_point + from_point
pbrt_file.write("LookAt\t%s %s %s\n\t%s %s %s\n\t%s %s %s\n\n" % \
(from_point.x, from_point.y, from_point.z, \
at_point.x, at_point.y, at_point.z, \
up_point[0],up_point[1],up_point[2]))
#https://blender.stackexchange.com/questions/14745/how-do-i-change-the-focal-length-of-a-camera-with-python
# compute fov according to ratio and angle (Blender uses max angle whereas pbrt uses min angle)
ratio = bpy.data.scenes['Scene'].render.resolution_y / bpy.data.scenes['Scene'].render.resolution_x
angle_rad = bpy.data.cameras[0].angle
fov = 2.0 * math.atan ( ratio * math.tan( angle_rad / 2.0 )) * 180.0 / math.pi
pbrt_file.write('Camera "perspective"\n')
pbrt_file.write('"float fov" [%s]\n' % (fov))
if bpy.data.scenes['Scene'].dofLookAt is not None:
pbrt_file.write('"float lensradius" [%s]\n' % (bpy.data.scenes['Scene'].lensradius))
pbrt_file.write('"float focaldistance" [%s]\n\n' % (measure(cam_ob.matrix_world.translation, bpy.data.scenes['Scene'].dofLookAt.matrix_world.translation)))
return ''
def export_film(pbrt_file, frameNumber):
outputFileName = os.path.splitext(os.path.basename(bpy.data.scenes[0].outputfilename))
print("Outputfilename:")
print(outputFileName[0])
print(outputFileName[1])
finalFileName = outputFileName[0] + frameNumber + outputFileName[1]
pbrt_file.write(r'Film "image" "integer xresolution" [%s] "integer yresolution" [%s] "string filename" "%s"' % (bpy.data.scenes[0].resolution_x, bpy.data.scenes[0].resolution_y, finalFileName))
pbrt_file.write("\n")
pbrt_file.write(r'PixelFilter "%s" "float xwidth" [%s] "float ywidth" [%s] ' % (bpy.data.scenes[0].filterType, bpy.data.scenes[0].filter_x_width, bpy.data.scenes[0].filter_y_width))
if bpy.data.scenes[0].filterType == 'sinc':
pbrt_file.write(r'"float tau" [%s]' % (bpy.data.scenes[0].filter_tau))
if bpy.data.scenes[0].filterType == 'mitchell':
pbrt_file.write(r'"float B" [%s]' % (bpy.data.scenes[0].filter_b))
pbrt_file.write(r'"float C" [%s]' % (bpy.data.scenes[0].filter_c))
if bpy.data.scenes[0].filterType == 'gaussian':
pbrt_file.write(r'"float alpha" [%s]' % (bpy.data.scenes[0].filter_alpha))
pbrt_file.write("\n")
pbrt_file.write(r'Accelerator "%s" ' % (bpy.data.scenes[0].accelerator))
pbrt_file.write("\n")
if bpy.data.scenes[0].accelerator == 'kdtree':
pbrt_file.write('"integer intersectcost" [%s]\n' % (bpy.data.scenes['Scene'].kdtreeaccel_intersectcost))
pbrt_file.write('"integer traversalcost" [%s]\n' % (bpy.data.scenes['Scene'].kdtreeaccel_traversalcost))
pbrt_file.write('"float emptybonus" [%s]\n' % (bpy.data.scenes['Scene'].kdtreeaccel_emptybonus))
pbrt_file.write('"integer maxprims" [%s]\n' % (bpy.data.scenes['Scene'].kdtreeaccel_maxprims))
pbrt_file.write('"integer maxdepth" [%s]\n' % (bpy.data.scenes['Scene'].kdtreeaccel_maxdepth))
if bpy.data.scenes[0].accelerator == 'bvh':
pbrt_file.write(r'"string splitmethod" "%s"' % (bpy.data.scenes[0].splitmethod))
pbrt_file.write("\n")
pbrt_file.write('"integer maxnodeprims" [%s]\n' % (bpy.data.scenes['Scene'].maxnodeprims))
return ''
def export_sampler(pbrt_file):
pbrt_file.write(r'Sampler "%s"'% (bpy.data.scenes[0].sampler))
pbrt_file.write("\n")
if bpy.data.scenes[0].sampler == 'halton':
pbrt_file.write(r'"integer pixelsamples" [%s]'% (bpy.data.scenes[0].spp))
pbrt_file.write("\n")
if bpy.data.scenes[0].samplepixelcenter:
pbrt_file.write(r'"bool samplepixelcenter" "true"')
else:
pbrt_file.write(r'"bool samplepixelcenter" "false"')
pbrt_file.write("\n")
if bpy.data.scenes[0].sampler == 'maxmin':
pbrt_file.write(r'"integer pixelsamples" [%s]'% (bpy.data.scenes[0].spp))
pbrt_file.write("\n")
pbrt_file.write(r'"integer dimensions" [%s]'% (bpy.data.scenes[0].dimension))
pbrt_file.write("\n")
if bpy.data.scenes[0].sampler == 'random':
pbrt_file.write(r'"integer pixelsamples" [%s]'% (bpy.data.scenes[0].spp))
pbrt_file.write("\n")
if bpy.data.scenes[0].sampler == 'sobol':
pbrt_file.write(r'"integer pixelsamples" [%s]'% (bpy.data.scenes[0].spp))
pbrt_file.write("\n")
if bpy.data.scenes[0].sampler == 'lowdiscrepancy':
pbrt_file.write(r'"integer pixelsamples" [%s]'% (bpy.data.scenes[0].spp))
pbrt_file.write("\n")
pbrt_file.write(r'"integer dimensions" [%s]'% (bpy.data.scenes[0].dimension))
pbrt_file.write("\n")
if bpy.data.scenes[0].sampler == 'stratified':
pbrt_file.write(r'"integer xsamples" [%s]'% (bpy.data.scenes[0].xsamples))
pbrt_file.write("\n")
pbrt_file.write(r'"integer ysamples" [%s]'% (bpy.data.scenes[0].ysamples))
pbrt_file.write("\n")
pbrt_file.write(r'"integer dimensions" [%s]'% (bpy.data.scenes[0].dimension))
pbrt_file.write("\n")
if bpy.data.scenes[0].jitter:
pbrt_file.write(r'"bool jitter" "true"')
else:
pbrt_file.write(r'"bool jitter" "false"')
pbrt_file.write("\n")
return ''
def export_integrator(pbrt_file, scene):
pbrt_file.write(r'Integrator "%s"' % (bpy.data.scenes[0].integrators))
pbrt_file.write("\n")
pbrt_file.write(r'"integer maxdepth" [%s]' % (bpy.data.scenes[0].maxdepth))
pbrt_file.write("\n")
if scene.integrators == 'bdpt':
if scene.bdpt_visualizestrategies :
pbrt_file.write(r'"bool visualizestrategies" "true"')
pbrt_file.write("\n")
if scene.bdpt_visualizeweights :
pbrt_file.write(r'"bool visualizeweights" "true"')
pbrt_file.write("\n")
if scene.integrators == 'mlt':
pbrt_file.write(r'"integer bootstrapsamples" [%s]' % (bpy.data.scenes[0].mlt_bootstrapsamples))
pbrt_file.write("\n")
pbrt_file.write(r'"integer chains" [%s]' % (bpy.data.scenes[0].mlt_chains))
pbrt_file.write("\n")
pbrt_file.write(r'"integer mutationsperpixel" [%s]' % (bpy.data.scenes[0].mlt_mutationsperpixel))
pbrt_file.write("\n")
pbrt_file.write(r'"float largestepprobability" [%s]' % (bpy.data.scenes[0].mlt_largestepprobability))
pbrt_file.write("\n")
pbrt_file.write(r'"float sigma" [%s]' % (bpy.data.scenes[0].mlt_sigma))
pbrt_file.write("\n")
if scene.integrators == 'sppm':
pbrt_file.write(r'"integer numiterations" [%s]' % (bpy.data.scenes[0].sppm_numiterations))
pbrt_file.write("\n")
pbrt_file.write(r'"integer photonsperiteration" [%s]' % (bpy.data.scenes[0].sppm_photonsperiteration))
pbrt_file.write("\n")
pbrt_file.write(r'"integer imagewritefrequency" [%s]' % (bpy.data.scenes[0].sppm_imagewritefrequency))
pbrt_file.write("\n")
pbrt_file.write(r'"float radius" [%s]' % (bpy.data.scenes[0].sppm_radius))
pbrt_file.write("\n")
return ''
def export_LightSampleDistribution(pbrt_file, scene):
pbrt_file.write(r'"string lightsamplestrategy" "%s"' % (bpy.data.scenes[0].lightsamplestrategy))
pbrt_file.write("\n")
return ''
def world_begin(pbrt_file):
pbrt_file.write("WorldBegin")
pbrt_file.write("\n\n")
return ''
def world_end(pbrt_file):
pbrt_file.write("WorldEnd")
pbrt_file.write("\n")
return ''
def export_EnviromentMap(pbrt_file):
if bpy.data.scenes[0].environmentmaptpath != "":
environmentMapFileName= getTextureInSlotName(bpy.data.scenes[0].environmentmaptpath)
#Copy the file by getting the full filepath:
srcfile = bpy.path.abspath(bpy.data.scenes[0].environmentmaptpath)
dstdir = bpy.path.abspath(bpy.data.scenes[0].exportpath + 'textures/' + environmentMapFileName)
print("os.path.dirname...")
print(os.path.dirname(srcfile))
print("\n")
print("srcfile: ")
print(srcfile)
print("\n")
print("dstdir: ")
print(dstdir)
print("\n")
print("File name is :")
print(environmentMapFileName)
print("Copying environment texture from source directory to destination directory.")
shutil.copyfile(srcfile, dstdir)
environmentmapscaleValue = bpy.data.scenes[0].environmentmapscale
pbrt_file.attr_begin()
pbrt_file.write(r'LightSource "infinite" "string mapname" "%s" "color scale" [%s %s %s]' % ("textures/" + environmentMapFileName,environmentmapscaleValue,environmentmapscaleValue,environmentmapscaleValue))
pbrt_file.write("\n")
pbrt_file.attr_end()
pbrt_file.write("\n\n")
def export_environmentLight(pbrt_file):
print("image texture type: ")
pbrt_file.write("\n")
environmenttype = bpy.data.worlds['World'].node_tree.nodes['Background'].inputs['Color'].links[0].from_node.type
environmentMapPath = ""
environmentMapFileName = ""
print(environmenttype)
pbrt_file.attr_begin()
if environmenttype == "TEX_IMAGE":
print(environmenttype)
environmentMapPath = bpy.data.worlds['World'].node_tree.nodes['Background'].inputs['Color'].links[0].from_node.image.filepath
environmentMapFileName= getTextureInSlotName(environmentMapPath)
print(environmentMapPath)
print(environmentMapFileName)
print("background strength: value:")
backgroundStrength = bpy.data.worlds['World'].node_tree.nodes['Background'].inputs[1].default_value
print(backgroundStrength)
pbrt_file.write(r'LightSource "infinite" "string mapname" "%s" "color scale" [%s %s %s]' % ("textures/" + environmentMapFileName,backgroundStrength,backgroundStrength,backgroundStrength))
pbrt_file.write("\n")
#pbrt_file.write(r'Rotate 10 0 0 1 Rotate -110 1 0 0 LightSource "infinite" "string mapname" "textures/20060807_wells6_hd.exr" "color scale" [2.5 2.5 2.5]')
if environmenttype == "RGB":
print(bpy.data.worlds['World'].node_tree.nodes['Background'].inputs['Color'].default_value[0])
pbrt_file.write(r'LightSource "infinite" "color L" [%s %s %s] "color scale" [%s %s %s]' %(bpy.data .worlds['World'].node_tree.nodes['Background'].inputs['Color'].default_value[0],bpy.data .worlds['World'].node_tree.nodes['Background'].inputs['Color'].default_value[1],bpy.data .worlds['World'].node_tree.nodes['Background'].inputs['Color'].default_value[2],backgroundStrength,backgroundStrength,backgroundStrength))
pbrt_file.write("\n")
pbrt_file.attr_end()
pbrt_file.write("\n\n")
return ''
def export_defaultMaterial(pbrt_file):
pbrt_file.write(r'Material "plastic"')
pbrt_file.write("\n")
pbrt_file.write(r'"color Kd" [.1 .1 .1]')
pbrt_file.write("\n")
pbrt_file.write(r'"color Ks" [.7 .7 .7] "float roughness" .1')
pbrt_file.write("\n\n")
return ''
def exportTextureInSlotNew(pbrt_file,textureSlotParam,isFloatTexture):
pbrt_file.write("\n")
srcfile = bpy.path.abspath(textureSlotParam)
texturefilename = getTextureInSlotName(srcfile)
if isFloatTexture :
pbrt_file.write(r'Texture "%s" "float" "imagemap" "string filename" ["%s"]' % (texturefilename, ("textures/" + texturefilename)))
else:
pbrt_file.write(r'Texture "%s" "color" "imagemap" "string filename" ["%s"]' % (texturefilename, ("textures/" + texturefilename)))
pbrt_file.write("\n")
dstdir = bpy.path.abspath(bpy.data.scenes[0].exportpath + 'textures/' + texturefilename)
print("os.path.dirname...")
print(os.path.dirname(srcfile))
print("\n")
print("srcfile: ")
print(srcfile)
print("\n")
print("dstdir: ")
print(dstdir)
print("\n")
print("File name is :")
print(texturefilename)
print("Copying texture from source directory to destination directory.")
shutil.copyfile(srcfile, dstdir)
return ''
def export_texture_from_input (pbrt_file, inputSlot, mat, isFloatTexture):
textureName = ""
links = inputSlot.links
print('Number of links: ')
print(len(links))
for x in inputSlot.links:
textureName = x.from_node.image.name
exportTextureInSlotNew(pbrt_file,x.from_node.image.filepath,isFloatTexture)
return textureName
def export_pbrt_matte_material (pbrt_file, mat):
print('Currently exporting Pbrt Matte material')
print (mat.name)
kdTextureName = ""
kdTextureName = export_texture_from_input(pbrt_file,mat.inputs[0],mat, False)
pbrt_file.write(r'Material "matte"')
pbrt_file.write("\n")
pbrt_file.write(r'"float sigma" [%s]' %(mat.Sigma))
pbrt_file.write("\n")
if kdTextureName != "" :
pbrt_file.write(r'"texture %s" "%s"' % ("Kd", kdTextureName))
else:
pbrt_file.write(r'"color Kd" [ %s %s %s]' %(mat.Kd[0],mat.Kd[1],mat.Kd[2]))
pbrt_file.write("\n")
return ''
def export_pbrt_mirror_material (pbrt_file, mat):
print('Currently exporting Pbrt mirror material')
print (mat.name)
krTextureName = export_texture_from_input(pbrt_file,mat.inputs[0],mat,False)
pbrt_file.write(r'Material "mirror"')
pbrt_file.write("\n")
if krTextureName != "":
pbrt_file.write(r'"texture %s" "%s"' % ("Kr", krTextureName))
else:
pbrt_file.write(r'"color Kr" [ %s %s %s]' %(mat.Kr[0],mat.Kr[1],mat.Kr[2]))
pbrt_file.write("\n")
return ''
def export_principled_bsdf_material(pbrt_file, mat):
print('Currently exporting principled_bsdf material, converting the material to pbrt disney on export.')
print (mat.name)
pbrt_file.write(r'Material "disney"')
pbrt_file.write("\n")
pbrt_file.write(r'"color color" [%s %s %s]' %(mat.inputs[0].default_value[0], mat.inputs[0].default_value[1], mat.inputs[0].default_value[2]))
pbrt_file.write("\n")
pbrt_file.write(r'"float metallic" [%s]' %(mat.inputs[4].default_value))
pbrt_file.write("\n")
pbrt_file.write(r'"float speculartint" [%s]' %(mat.inputs[6].default_value))
pbrt_file.write("\n")
pbrt_file.write(r'"float roughness" [%s]' %(mat.inputs[7].default_value))
pbrt_file.write("\n")
pbrt_file.write(r'"float sheen" [%s]' %(mat.inputs[10].default_value))
pbrt_file.write("\n")
pbrt_file.write(r'"float sheentint" [%s]' %(mat.inputs[11].default_value))
pbrt_file.write("\n")
pbrt_file.write(r'"float clearcoat" [%s]' %(mat.inputs[12].default_value))
pbrt_file.write("\n")
pbrt_file.write(r'"float difftrans" [%s]' %(mat.inputs[15].default_value))
pbrt_file.write("\n")
return ''
def export_pbrt_emissive_material(pbrt_file, mat):
color = mat.inputs["Color"]
strength = mat.inputs["Strength"].default_value
pbrt_file.write(r'AreaLightSource "diffuse" "rgb L" [ {} {} {} ]'.format(color.default_value[0] * strength, color.default_value[1] * strength, color.default_value[2] * strength))
pbrt_file.write("\n")
return ''
def export_pbrt_translucent_material(pbrt_file, mat):
print('Currently exporting Pbrt Translucent material')
print (mat.name)
nodes = mat.node_tree.nodes
kdTextureName = ""
kdTextureName = export_texture_from_input(pbrt_file,mat.inputs[0],mat, False)
ksTextureName = ""
ksTextureName = export_texture_from_input(pbrt_file,mat.inputs[1],mat, False)
ReflectTextureName = ""
ReflectTextureName = export_texture_from_input(pbrt_file,mat.inputs[2],mat, False)
TransmitTextureName = ""
TransmitTextureName = export_texture_from_input(pbrt_file,mat.inputs[3],mat, False)
pbrt_file.write(r'Material "translucent"')
pbrt_file.write("\n")
pbrt_file.write(r'"float roughness" [%s]' %(mat.Roughness))
pbrt_file.write("\n")
if kdTextureName != "" :
pbrt_file.write(r'"texture %s" "%s"' % ("Kd", kdTextureName))
pbrt_file.write("\n")
else:
pbrt_file.write(r'"color Kd" [ %s %s %s]' %(mat.Kd[0],mat.Kd[1],mat.Kd[2]))
pbrt_file.write("\n")
if ksTextureName != "" :
pbrt_file.write(r'"texture %s" "%s"' % ("Ks", ksTextureName))
pbrt_file.write("\n")
else:
pbrt_file.write(r'"color Ks" [ %s %s %s]' %(mat.Ks[0],mat.Ks[1],mat.Ks[2]))
pbrt_file.write("\n")
if ReflectTextureName != "" :
pbrt_file.write(r'"texture %s" "%s"' % ("reflect", ReflectTextureName))
pbrt_file.write("\n")
else:
pbrt_file.write(r'"color reflect" [ %s %s %s]' %(mat.Reflect[0],mat.Reflect[1],mat.Reflect[2]))
pbrt_file.write("\n")
if TransmitTextureName != "" :
pbrt_file.write(r'"texture %s" "%s"' % ("transmit", TransmitTextureName))
pbrt_file.write("\n")
else:
pbrt_file.write(r'"color transmit" [ %s %s %s]' %(mat.Transmit[0],mat.Transmit[1],mat.Transmit[2]))
if mat.Remaproughness == True :
pbrt_file.write(r'"bool remaproughness" "true"')
pbrt_file.write("\n")
else:
pbrt_file.write(r'"bool remaproughness" "false"')
pbrt_file.write("\n")
return ''
def export_medium(pbrt_file, inputNode):
if inputNode is not None:
for node_links in inputNode.links:
if node_links.from_node.bl_idname == "CustomNodeTypeMedium":
mediumNode = node_links.from_node
print('We have a node connected to medium slot.')
print('The name of the connected node is: ')
print(mediumNode.name)
pbrt_file.write(r'MakeNamedMedium "%s"' % (mediumNode.name))
pbrt_file.write("\n")
pbrt_file.write(r'"string type" ["%s"]' % (mediumNode.Type))
pbrt_file.write("\n")
sigma_a = mediumNode.inputs[0].default_value
pbrt_file.write(r'"rgb sigma_a" [ %s %s %s]' %(sigma_a[0],sigma_a[1],sigma_a[2]))
pbrt_file.write("\n")
sigma_s = mediumNode.inputs[1].default_value
pbrt_file.write(r'"rgb sigma_s" [ %s %s %s]' %(sigma_s[0],sigma_s[1],sigma_s[2]))
pbrt_file.write("\n")
pbrt_file.write(r'"float g" [ %s ]' % (mediumNode.g))
pbrt_file.write("\n")
pbrt_file.write(r'"float scale" [ %s ]' % (mediumNode.Scale))
pbrt_file.write("\n")
pbrt_file.write("\n")
return mediumNode.name
return None
def export_pbrt_glass_material (pbrt_file, mat):
print('Currently exporting Pbrt Glass material')
print (mat.name)
krTextureName = export_texture_from_input(pbrt_file,mat.inputs[2],mat,False)
ktTextureName = export_texture_from_input(pbrt_file,mat.inputs[3],mat,False)
uRoughnessTextureName = export_texture_from_input(pbrt_file,mat.inputs[0],mat,True)
vRoughnessTextureName = export_texture_from_input(pbrt_file,mat.inputs[1],mat, True)
#TODO: Fix so that medium is exported from slot.
mediumNodeName = export_medium(pbrt_file,mat.inputs[4])
if mediumNodeName is not None:
pbrt_file.write(r'MediumInterface "%s" ""' % (mediumNodeName))
pbrt_file.write("\n")
pbrt_file.write(r'Material "glass"')
pbrt_file.write("\n")
if krTextureName != "":
pbrt_file.write(r'"texture %s" "%s"' % ("Kr", krTextureName))
else:
pbrt_file.write(r'"color Kr" [ %s %s %s]' %(mat.kr[0],mat.kr[1],mat.kr[2]))
pbrt_file.write("\n")
if ktTextureName != "":
pbrt_file.write(r'"texture %s" "%s"' % ("Kt", ktTextureName))
else:
pbrt_file.write(r'"color Kt" [ %s %s %s]' %(mat.kt[0],mat.kt[1],mat.kt[2]))
pbrt_file.write("\n")
if(uRoughnessTextureName != ""):
pbrt_file.write(r'"texture %s" "%s"' % ("uroughness", uRoughnessTextureName))
else:
pbrt_file.write(r'"float uroughness" [%s]' %(mat.uRoughness))
pbrt_file.write("\n")
if (vRoughnessTextureName != ""):
pbrt_file.write(r'"texture %s" "%s"' % ("vroughness", vRoughnessTextureName))
else:
pbrt_file.write(r'"float vroughness" [%s]' %(mat.vRoughness))
pbrt_file.write("\n")
pbrt_file.write(r'"float index" [%s]' %(mat.Index))
pbrt_file.write("\n")
return ''
def export_pbrt_substrate_material (pbrt_file, mat):
print('Currently exporting Pbrt Substrate material')
print (mat.name)
uRoughnessTextureName = export_texture_from_input(pbrt_file,mat.inputs[0],mat,True)
vRoughnessTextureName = export_texture_from_input(pbrt_file,mat.inputs[1],mat, True)
kdTextureName = export_texture_from_input(pbrt_file,mat.inputs[2],mat,False)
ksTextureName = export_texture_from_input(pbrt_file,mat.inputs[3],mat,False)
pbrt_file.write(r'Material "substrate"')
pbrt_file.write("\n")
if(uRoughnessTextureName != ""):
pbrt_file.write(r'"texture %s" "%s"' % ("uroughness", uRoughnessTextureName))
else:
pbrt_file.write(r'"float uroughness" [%s]'\
%(mat.uRoughness))
pbrt_file.write("\n")
if (vRoughnessTextureName != ""):
pbrt_file.write(r'"texture %s" "%s"' % ("vroughness", vRoughnessTextureName))
else:
pbrt_file.write(r'"float vroughness" [%s]'\
%(mat.vRoughness))
pbrt_file.write("\n")
if (kdTextureName != ""):
pbrt_file.write(r'"texture %s" "%s"' % ("Kd", kdTextureName))
else :
pbrt_file.write(r'"color Kd" [ %s %s %s]' %(mat.Kd[0],mat.Kd[1],mat.Kd[2]))
pbrt_file.write("\n")
if (ksTextureName != ""):
pbrt_file.write(r'"texture %s" "%s"' % ("Ks", ksTextureName))
else :
pbrt_file.write(r'"color Ks" [ %s %s %s]' %(mat.Ks[0],mat.Ks[1],mat.Ks[2]))
pbrt_file.write("\n")
return ''
#TODO: export sigma_a sigma_s texture and color
def export_pbrt_subsurface_material (pbrt_file, mat):
print('Currently exporting Pbrt Subsurface material.')
print (mat.name)
uRoughnessTextureName = export_texture_from_input(pbrt_file,mat.inputs[0],mat,True)
vRoughnessTextureName = export_texture_from_input(pbrt_file,mat.inputs[1],mat, True)
krTextureName = export_texture_from_input(pbrt_file,mat.inputs[2],mat,False)
ktTextureName = export_texture_from_input(pbrt_file,mat.inputs[3],mat,False)
sigma_aTextureName = export_texture_from_input(pbrt_file,mat.inputs[4],mat,False)
sigma_sTextureName = export_texture_from_input(pbrt_file,mat.inputs[5],mat,False)
mediumNodeName = export_medium(pbrt_file,mat.inputs[6])
if mediumNodeName is not None:
pbrt_file.write(r'MediumInterface "%s" ""' % (mediumNodeName))
pbrt_file.write("\n")
pbrt_file.write(r'Material "subsurface"')
pbrt_file.write("\n")
if (mat.presetName != "None"):
pbrt_file.write(r'"string name" ["%s"]' % (mat.presetName))
pbrt_file.write("\n")
pbrt_file.write(r'"float scale" [%s]'\
%(mat.scale))
pbrt_file.write("\n")
pbrt_file.write(r'"float eta" [%s]'\
%(mat.eta))
pbrt_file.write("\n")
if(uRoughnessTextureName != ""):
pbrt_file.write(r'"texture %s" "%s"' % ("uroughness", uRoughnessTextureName))
else:
pbrt_file.write(r'"float uroughness" [%s]'\
%(mat.uRoughness))
pbrt_file.write("\n")
if (vRoughnessTextureName != ""):
pbrt_file.write(r'"texture %s" "%s"' % ("vroughness", vRoughnessTextureName))
else:
pbrt_file.write(r'"float vroughness" [%s]'\
%(mat.vRoughness))
pbrt_file.write("\n")
if (krTextureName != ""):
pbrt_file.write(r'"texture %s" "%s"' % ("Kr", krTextureName))
else :
if (mat.presetName == "None"):
pbrt_file.write(r'"color Kr" [ %s %s %s]' %(mat.kr[0],mat.kr[1],mat.kr[2]))
pbrt_file.write("\n")
if (ktTextureName != ""):
pbrt_file.write(r'"texture %s" "%s"' % ("Kt", ktTextureName))
else :
if (mat.presetName == "None"):
pbrt_file.write(r'"color Kt" [ %s %s %s]' %(mat.kt[0],mat.kt[1],mat.kt[2]))
pbrt_file.write("\n")
if (mat.presetName == "None"):
if (sigma_aTextureName != ""):
pbrt_file.write(r'"texture %s" "%s"' % ("Sigma_a", sigma_aTextureName))
else:
pbrt_file.write(r'"color sigma_a" [ %s %s %s]' %(mat.sigma_a[0],mat.sigma_a[1],mat.sigma_a[2]))
pbrt_file.write("\n")
if (sigma_sTextureName != ""):
pbrt_file.write(r'"texture %s" "%s"' % ("Sigma_s", sigma_sTextureName))
else:
pbrt_file.write(r'"color sigma_s" [ %s %s %s]' %(mat.sigma_s[0],mat.sigma_s[1],mat.sigma_a[2]))
pbrt_file.write("\n")
if mat.remaproughness == True :
pbrt_file.write(r'"bool remaproughness" "true"')
pbrt_file.write("\n")
else:
pbrt_file.write(r'"bool remaproughness" "false"')
pbrt_file.write("\n")
return ''
def export_pbrt_uber_material (pbrt_file, mat):
print('Currently exporting Pbrt Uber material.')
print (mat.name)
kdTextureName = export_texture_from_input(pbrt_file,mat.inputs[0],mat,False)
ksTextureName = export_texture_from_input(pbrt_file,mat.inputs[1],mat,False)
krTextureName = export_texture_from_input(pbrt_file,mat.inputs[2],mat,False)
ktTextureName = export_texture_from_input(pbrt_file,mat.inputs[3],mat,False)
uRoughnessTextureName = export_texture_from_input(pbrt_file,mat.inputs[4],mat,True)
vRoughnessTextureName = export_texture_from_input(pbrt_file,mat.inputs[5],mat, True)
opacityTextureName = export_texture_from_input(pbrt_file,mat.inputs[6],mat, True)
pbrt_file.write(r'Material "uber"')
pbrt_file.write("\n")
if (kdTextureName != ""):
pbrt_file.write(r'"texture %s" "%s"' % ("Kd", kdTextureName))
else :
pbrt_file.write(r'"color Kd" [ %s %s %s]' %(mat.kd[0],mat.kd[1],mat.kd[2]))
pbrt_file.write("\n")
if (ksTextureName != ""):
pbrt_file.write(r'"texture %s" "%s"' % ("Ks", ksTextureName))
else :
pbrt_file.write(r'"color Ks" [ %s %s %s]' %(mat.ks[0],mat.ks[1],mat.ks[2]))
pbrt_file.write("\n")
if (krTextureName != ""):
pbrt_file.write(r'"texture %s" "%s"' % ("Kr", krTextureName))
else :
pbrt_file.write(r'"color Kr" [ %s %s %s]' %(mat.kr[0],mat.kr[1],mat.kr[2]))
pbrt_file.write("\n")
if (ktTextureName != ""):
pbrt_file.write(r'"texture %s" "%s"' % ("Kt", ktTextureName))
else :
pbrt_file.write(r'"color Kt" [ %s %s %s]' %(mat.kt[0],mat.kt[1],mat.kt[2]))
pbrt_file.write("\n")
if(uRoughnessTextureName != ""):
pbrt_file.write(r'"texture %s" "%s"' % ("uroughness", uRoughnessTextureName))
else:
pbrt_file.write(r'"float uroughness" [%s]'\
%(mat.uRoughness))
pbrt_file.write("\n")
if (vRoughnessTextureName != ""):
pbrt_file.write(r'"texture %s" "%s"' % ("vroughness", vRoughnessTextureName))
else:
pbrt_file.write(r'"float vroughness" [%s]' %(mat.vRoughness))
pbrt_file.write("\n")
if mat.eta != 0.0:
pbrt_file.write(r'"float eta" [%s]' %(mat.eta))
pbrt_file.write("\n")
if (opacityTextureName != ""):
pbrt_file.write(r'"texture %s" "%s"' % ("opacity", opacityTextureName))
pbrt_file.write("\n")
return ''
def export_pbrt_plastic_material (pbrt_file, mat):
print('Currently exporting Pbrt Plastic material.')
print (mat.name)
kdTextureName = export_texture_from_input(pbrt_file,mat.inputs[0],mat,False)
ksTextureName = export_texture_from_input(pbrt_file,mat.inputs[1],mat,False)
roughnessTextureName=export_texture_from_input(pbrt_file,mat.inputs[2],mat,True)
pbrt_file.write(r'Material "plastic"')
pbrt_file.write("\n")
if (kdTextureName != ""):
pbrt_file.write(r'"texture %s" "%s"' % ("Kd", kdTextureName))
else :
pbrt_file.write(r'"color Kd" [ %s %s %s]' %(mat.Kd[0],mat.Kd[1],mat.Kd[2]))
pbrt_file.write("\n")
if (ksTextureName != ""):
pbrt_file.write(r'"texture %s" "%s"' % ("Ks", ksTextureName))
else :
pbrt_file.write(r'"color Ks" [ %s %s %s]' %(mat.Ks[0],mat.Ks[1],mat.Ks[2]))
pbrt_file.write("\n")
if (roughnessTextureName != ""):
pbrt_file.write(r'"texture %s" "%s"' % ("Roughness", roughnessTextureName))
else:
pbrt_file.write(r'"float roughness" [%s]' %(mat.Roughness))
pbrt_file.write("\n")
return ''
def export_pbrt_metal_material (pbrt_file, mat):
print('Currently exporting Pbrt Metal material')
print (mat.name)
etaTextureName = export_texture_from_input(pbrt_file,mat.inputs[0],mat,False)
kTextureName = export_texture_from_input(pbrt_file,mat.inputs[1],mat,False)
uRoughnessTextureName = export_texture_from_input(pbrt_file,mat.inputs[2],mat,True)
vRoughnessTextureName = export_texture_from_input(pbrt_file,mat.inputs[3],mat, True)
bumpTextureName = export_texture_from_input(pbrt_file,mat.inputs[4],mat, True)
pbrt_file.write(r'Material "metal"')
pbrt_file.write("\n")
if (etaTextureName != ""):
pbrt_file.write(r'"texture %s" "%s"' % ("eta", etaTextureName))
else :
pbrt_file.write(r'"color eta" [ %s %s %s]' %(mat.eta[0],mat.eta[1],mat.eta[2]))
pbrt_file.write("\n")
if (kTextureName != ""):
pbrt_file.write(r'"texture %s" "%s"' % ("k", kTextureName))
else :
pbrt_file.write(r'"color k" [ %s %s %s]' %(mat.kt[0],mat.kt[1],mat.kt[2]))
pbrt_file.write("\n")
pbrt_file.write(r'"float roughness" [%s]' %(mat.roughness))
pbrt_file.write("\n")
if(uRoughnessTextureName != ""):
pbrt_file.write(r'"texture %s" "%s"' % ("uroughness", uRoughnessTextureName))
else:
pbrt_file.write(r'"float uroughness" [%s]'\
%(mat.uRoughness))
pbrt_file.write("\n")
if (vRoughnessTextureName != ""):
pbrt_file.write(r'"texture %s" "%s"' % ("vroughness", vRoughnessTextureName))
else:
pbrt_file.write(r'"float vroughness" [%s]'\
%(mat.vRoughness))
pbrt_file.write("\n")
if (bumpTextureName != ""):
pbrt_file.write(r'"texture %s" "%s"' % ("bumpmap", bumpTextureName))
return ''
def export_pbrt_disney_material (pbrt_file, mat):
print('Currently exporting Pbrt Disney material.')
print (mat.name)
colorTextureName = export_texture_from_input(pbrt_file,mat.inputs[0],mat,False)
metallicTextureName = export_texture_from_input(pbrt_file,mat.inputs[1],mat,True)
etaTextureName = export_texture_from_input(pbrt_file,mat.inputs[2],mat,True)
roughnessTextureName = export_texture_from_input(pbrt_file,mat.inputs[3],mat,True)
speculartintTextureName = export_texture_from_input(pbrt_file,mat.inputs[4],mat,True)
anisotropicTextureName = export_texture_from_input(pbrt_file,mat.inputs[5],mat,True)
sheenTextureName = export_texture_from_input(pbrt_file,mat.inputs[6],mat,True)
sheenTintTextureName = export_texture_from_input(pbrt_file,mat.inputs[7],mat,True)
clearCoatTextureName = export_texture_from_input(pbrt_file,mat.inputs[8],mat,True)
clearCoatGlossTextureName = export_texture_from_input(pbrt_file,mat.inputs[9],mat,True)
specTransTextureName = export_texture_from_input(pbrt_file,mat.inputs[10],mat,True)
flatnessTextureName = export_texture_from_input(pbrt_file,mat.inputs[11],mat,True)
diffTransTextureName = export_texture_from_input(pbrt_file,mat.inputs[12],mat,True)
pbrt_file.write(r'Material "disney"')
pbrt_file.write("\n")
if (colorTextureName != ""):
pbrt_file.write(r'"texture %s" "%s"' % ("color", colorTextureName))
else :
pbrt_file.write(r'"color color" [%s %s %s]' %(mat.color[0], mat.color[1], mat.color[2]))
pbrt_file.write("\n")
if (metallicTextureName != ""):
pbrt_file.write(r'"texture %s" "%s"' % ("metallic", metallicTextureName))
else :
pbrt_file.write(r'"float metallic" [%s]' %(mat.metallic))
pbrt_file.write("\n")
if (etaTextureName != ""):
pbrt_file.write(r'"texture %s" "%s"' % ("eta", etaTextureName))
else :
pbrt_file.write(r'"float eta" [%s]' %(mat.eta))
pbrt_file.write("\n")
if (roughnessTextureName != ""):
pbrt_file.write(r'"texture %s" "%s"' % ("roughness", roughnessTextureName))
else :
pbrt_file.write(r'"float roughness" [%s]' %(mat.roughness))
pbrt_file.write("\n")
if (speculartintTextureName != ""):
pbrt_file.write(r'"texture %s" "%s"' % ("speculartint", speculartintTextureName))
else :
pbrt_file.write(r'"float speculartint" [%s]' %(mat.specularTint))
pbrt_file.write("\n")
if (anisotropicTextureName != ""):
pbrt_file.write(r'"texture %s" "%s"' % ("anisotropic", anisotropicTextureName))
else :
pbrt_file.write(r'"float anisotropic" [%s]' %(mat.anisotropic))
pbrt_file.write("\n")
if (sheenTextureName != ""):
pbrt_file.write(r'"texture %s" "%s"' % ("sheen", sheenTextureName))
else :
pbrt_file.write(r'"float sheen" [%s]' %(mat.sheen))
pbrt_file.write("\n")
if (sheenTintTextureName != ""):
pbrt_file.write(r'"texture %s" "%s"' % ("sheentint", sheenTintTextureName))
else :
pbrt_file.write(r'"float sheentint" [%s]' %(mat.sheenTint))
pbrt_file.write("\n")
if (clearCoatTextureName != ""):
pbrt_file.write(r'"texture %s" "%s"' % ("clearcoat", clearCoatTextureName))
else :
pbrt_file.write(r'"float clearcoat" [%s]' %(mat.clearCoat))
pbrt_file.write("\n")
if (clearCoatGlossTextureName != ""):
pbrt_file.write(r'"texture %s" "%s"' % ("clearcoatgloss", clearCoatGlossTextureName))
else :
pbrt_file.write(r'"float clearcoatgloss" [%s]' %(mat.clearCoatGloss))
pbrt_file.write("\n")
if (specTransTextureName != ""):
pbrt_file.write(r'"texture %s" "%s"' % ("spectrans", specTransTextureName))
else :
pbrt_file.write(r'"float spectrans" [%s]' %(mat.specTrans))
pbrt_file.write("\n")