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# Copyright 2004-2008 Nanorex, Inc. See LICENSE file for details.
"""
writepovfile.py -- write a Part into a POV-Ray file
@version: $Id$
@copyright: 2004-2008 Nanorex, Inc. See LICENSE file for details.
History:
Bruce 080917 split this out of graphics/rendering/fileIO.py.
For earlier history see that file's repository log.
"""
import math
import foundation.env as env
from geometry.VQT import V, Q, A, vlen
from graphics.rendering.povray.povheader import povheader, povpoint
from utilities.prefs_constants import PERSPECTIVE
from utilities.prefs_constants import material_specular_highlights_prefs_key
from utilities.prefs_constants import material_specular_finish_prefs_key
# ==
# Create a POV-Ray file
def writepovfile(part, glpane, filename):
"""
write the given part into a new POV-Ray file with the given name,
using glpane for lighting, color, etc
"""
f = open(filename,"w")
# POV-Ray images now look correct when Projection = ORTHOGRAPHIC. Mark 051104.
if glpane.ortho == PERSPECTIVE:
cdist = 6.0 # Camera distance [see also glpane.cdist]
else: # ORTHOGRAPHIC
cdist = 1600.0
aspect = (glpane.width + 0.0)/(glpane.height + 0.0)
zfactor = 0.4 # zoom factor
up = V(0.0, zfactor, 0.0)
right = V( aspect * zfactor, 0.0, 0.0) ##1.33
angle = 2.0*math.atan2(aspect, cdist)*180.0/math.pi
f.write("// Recommended window size: width=%d, height=%d \n"%(glpane.width, glpane.height))
f.write("// Suggested command line switches: +A +W%d +H%d\n\n"%(glpane.width, glpane.height))
f.write(povheader)
# Camera info
vdist = cdist
if aspect < 1.0:
vdist = cdist / aspect
eyePos = vdist * glpane.scale*glpane.out-glpane.pov
# note: this is probably the same as glpane.eyeball(),
# in perspective view, except for the aspect < 1.0 correction.
# See comments in def eyeball about whether that correction
# is needed there as well. [bruce 080912 comment]
f.write("#declare cameraPosition = "+ povpoint(eyePos) + ";\n" +
"\ncamera {\n location cameraPosition" +
"\n up " + povpoint(up) +
"\n right " + povpoint(right) +
"\n sky " + povpoint(glpane.up) +
"\n angle " + str(angle) +
"\n look_at " + povpoint(-glpane.pov) + "\n}\n\n")
# Background color. The SkyBlue gradient is supported, but only works correctly when in "Front View".
# This is a work in progress (and this implementation is better than nothing). See bug 888 for more info.
# Mark 051104.
if glpane.backgroundGradient: # SkyBlue.
dt = Q(glpane.quat)
if not vlen(V(dt.x, dt.y, dt.z)):
# This addresses a problem in POV-Ray when dt=0,0,0 for Axis_Rotate_Trans. mark 051111.
dt.x = .00001
degY = dt.angle*180.0/math.pi
f.write("sky_sphere {\n" +
" pigment {\n" +
" gradient y\n" +
" color_map {\n" +
" [(1-cos(radians(" + str(90-angle/2) + ")))/2 color SkyWhite]\n" +
" [(1-cos(radians(" + str(90+angle/2) + ")))/2 color SkyBlue]\n" +
" }\n" +
" scale 2\n" +
" translate -1\n" +
" }\n" +
' #include "transforms.inc"\n' +
" Axis_Rotate_Trans(" + povpoint(V(dt.x, dt.y, dt.z)) + ", " + str(degY) + ")\n" +
" }\n")
else: # Solid
f.write("background {\n color rgb " + povpoint(glpane.backgroundColor*V(1,1,-1)) + "\n}\n")
# Lights and Atomic finish.
_writepovlighting(f, glpane)
# write a union object, which encloses all following objects, so it's
# easier to set a global modifier like "Clipped_by" for all objects
# Huaicai 1/6/05
f.write("\nunion {\t\n") # Head of the union object
# Write atoms and bonds in the part
part.writepov(f, glpane.displayMode)
#bruce 050421 changed assy.tree to assy.part.topnode to fix an assy/part bug
#bruce 050927 changed assy.part -> new part arg
#bruce 070928 call part.writepov instead of directly calling part.topnode.writepov,
# so the part can prevent external bonds from being drawn twice.
# set the near and far clipping plane
# removed 050817 josh -- caused crud to appear in the output (and slowed rendering 5x!!)
## farPos = -cdist*glpane.scale*glpane.out*glpane.far + eyePos
## nearPos = -cdist*glpane.scale*glpane.out*glpane.near + eyePos
## pov_out = (glpane.out[0], glpane.out[1], -glpane.out[2])
## pov_far = (farPos[0], farPos[1], -farPos[2])
## pov_near = (nearPos[0], nearPos[1], -nearPos[2])
## pov_in = (-glpane.out[0], -glpane.out[1], glpane.out[2])
## f.write("clipped_by { plane { " + povpoint(-glpane.out) + ", " + str(dot(pov_in, pov_far)) + " }\n")
## f.write(" plane { " + povpoint(glpane.out) + ", " + str(dot(pov_out, pov_near)) + " } }\n")
# [and what was this for? bruce question 071009]
## if glpane.assy.commandSequencer.currentCommand.commandName == 'DEPOSIT':
## dt = -glpane.quat
## degY = dt.angle*180.0/pi
## f.write("plane { \n" +
## " z 0\n" +
## " pigment { color rgbf <0.29, 0.7294, 0.8863, 0.6>}\n" +
## ' #include "transforms.inc"\n' +
## " Axis_Rotate_Trans(" + povpoint(V(dt.x, dt.y, dt.z)) + ", " + str(degY) + ")}\n")
f.write("}\n\n")
f.close()
return # from writepovfile
# _writepovlighting() added by Mark. Feel free to ask him if you have questions. 051130.
def _writepovlighting(f, glpane):
"""
Writes a light source record for each light (if enabled) and the
'Atomic' finish record. These records impact the lighting affect.
"""
# Get the lighting parameters for the 3 lights.
(((r0,g0,b0),a0,d0,s0,x0,y0,z0,e0), \
( (r1,g1,b1),a1,d1,s1,x1,y1,z1,e1), \
( (r2,g2,b2),a2,d2,s2,x2,y2,z2,e2)) = glpane.getLighting()
# For now, we copy the coords of each light here.
pos0 = (glpane.right * x0) + (glpane.up *y0) + (glpane.out * z0)
pos1 = (glpane.right * x1) + (glpane.up * y1) + (glpane.out * z1)
pos2 = (glpane.right * x2) + (glpane.up * y2) + (glpane.out * z2)
# The ambient values of only the enabled lights are summed up.
# 'ambient' is used in the 'Atomic' finish record. It can have a value
# over 1.0 (and makes a difference).
ambient = 0.25 # Add 0.25; matches better with NE1 default lighting.
# The diffuse values of only the enabled lights are summed up.
# 'diffuse' is used in the 'Atomic' finish record. It can have a value
# over 1.0 (and makes a difference).
diffuse = 0.0
f.write( "\n// Light #0 (Camera Light)" +
"\nlight_source {" +
"\n cameraPosition" +
"\n color <0.3, 0.3, 0.3>" +
"\n parallel" +
"\n point_at <0.0, 0.0, 0.0>" +
"\n}\n")
if e0: # Light 1 is On
ambient += a0
diffuse += d0
f.write( "\n// Light #1" +
"\nlight_source {" +
"\n " + povpoint(pos0) +
"\n color <" + str(r0*d0) + ", " + str(g0*d0) + ", " + str(b0*d0) + ">" +
"\n parallel" +
"\n point_at <0.0, 0.0, 0.0>" +
"\n}\n")
if e1: # Light 2 is On
ambient += a1
diffuse += d1
f.write( "\n// Light #2" +
"\nlight_source {\n " + povpoint(pos1) +
"\n color <" + str(r1*d1) + ", " + str(g1*d1) + ", " + str(b1*d1) + ">" +
"\n parallel" +
"\n point_at <0.0, 0.0, 0.0>" +
"\n}\n")
if e2: # Light 3 is On
ambient += a2
diffuse += d2
f.write("\n// Light #3" +
"\nlight_source {\n " + povpoint(pos2) +
"\n color <" + str(r2*d2) + ", " + str(g2*d2) + ", " + str(b2*d2) + ">" +
"\n parallel" +
"\n point_at <0.0, 0.0, 0.0>" +
"\n}\n")
# Atomic finish record.
#
# phong determines the brightness of the highlight, while phong_size determines its size.
#
# phong: 0.0 (no highlight) to 1.0 (saturated highlight)
#
# phong_size: 1 (very dull) to 250 (highly polished)
# The larger the phong size the tighter, or smaller, the highlight and
# the shinier the appearance. The smaller the phong size the looser,
# or larger, the highlight and the less glossy the appearance.
#
# Good values:
# brushed metal: phong .25, phong_size 12
# plastic: .7, phong_size 17
#
# so phong ranges from .25 - .7
# and phong_size ranges from 12-17
#
if env.prefs[material_specular_highlights_prefs_key]:
# whiteness: 0.0-1.0, where 0 = metal and 1 = plastic
phong = 0.25 + (env.prefs[material_specular_finish_prefs_key] * 0.45) # .25-.7
phong_size = 12.0 + (env.prefs[material_specular_finish_prefs_key] * 5.0) # 12-17
else:
phong = 0.0 # No specular highlights
phong_size = 0.0
f.write( "\n#declare Atomic =" +
"\nfinish {" +
"\n ambient 0.1" + # str(ambient) + # Mark 060929
"\n diffuse " + str(diffuse) +
"\n phong " + str(phong) +
"\n phong_size " + str(phong_size) +
"\n}\n")
return # from _writepovlighting
# end
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