Matt Pharr 0270166920 Add Zero-Day frames (from measure one) 8 years ago
..
geometry 0270166920 Add Zero-Day frames (from measure one) 8 years ago
spds 0270166920 Add Zero-Day frames (from measure one) 8 years ago
textures 0270166920 Add Zero-Day frames (from measure one) 8 years ago
README.txt 0270166920 Add Zero-Day frames (from measure one) 8 years ago
frame120.pbrt 0270166920 Add Zero-Day frames (from measure one) 8 years ago
frame180.pbrt 0270166920 Add Zero-Day frames (from measure one) 8 years ago
frame210.pbrt 0270166920 Add Zero-Day frames (from measure one) 8 years ago
frame25.pbrt 0270166920 Add Zero-Day frames (from measure one) 8 years ago
frame300.pbrt 0270166920 Add Zero-Day frames (from measure one) 8 years ago
frame35.pbrt 0270166920 Add Zero-Day frames (from measure one) 8 years ago
frame380.pbrt 0270166920 Add Zero-Day frames (from measure one) 8 years ago
frame52.pbrt 0270166920 Add Zero-Day frames (from measure one) 8 years ago
frame85.pbrt 0270166920 Add Zero-Day frames (from measure one) 8 years ago
geometry-f120.pbrt 0270166920 Add Zero-Day frames (from measure one) 8 years ago
geometry-f180.pbrt 0270166920 Add Zero-Day frames (from measure one) 8 years ago
geometry-f210.pbrt 0270166920 Add Zero-Day frames (from measure one) 8 years ago
geometry-f25.pbrt 0270166920 Add Zero-Day frames (from measure one) 8 years ago
geometry-f300.pbrt 0270166920 Add Zero-Day frames (from measure one) 8 years ago
geometry-f35.pbrt 0270166920 Add Zero-Day frames (from measure one) 8 years ago
geometry-f380.pbrt 0270166920 Add Zero-Day frames (from measure one) 8 years ago
geometry-f52.pbrt 0270166920 Add Zero-Day frames (from measure one) 8 years ago
geometry-f85.pbrt 0270166920 Add Zero-Day frames (from measure one) 8 years ago
geometry.pbrt 0270166920 Add Zero-Day frames (from measure one) 8 years ago
lights.sed 0270166920 Add Zero-Day frames (from measure one) 8 years ago
main.pbrt 0270166920 Add Zero-Day frames (from measure one) 8 years ago
materials.pbrt 0270166920 Add Zero-Day frames (from measure one) 8 years ago
parseass.go 0270166920 Add Zero-Day frames (from measure one) 8 years ago
textures.pbrt 0270166920 Add Zero-Day frames (from measure one) 8 years ago

README.txt


Conversion notes:

Frames were exported from Cinema4D using the pbrt exporter. (It's important
to change the logging level in the export dialog to "Error", since
otherwise many messages are generated and it seems that c4d has some sort
of O(n^2) thing going on there, since exports slow to a crawl.

Geometry fiels were then converted to use PLY meshes using "pbrt
--toply". There are many repeated meshes (both shared across multiple
frames but also identical meshes within a single frame. These were boiled
down to unique messages using the following go program, which prints a
script for "sed" to stdout.

package main

import (
"crypto/sha256"
"encoding/hex"
"fmt"
"io/ioutil"
"os"
)

func main() {
for _, fn := range os.Args[1:] {
contents, err := ioutil.ReadFile(fn)
if err != nil {
fmt.Fprintf(os.Stderr, "%s: %v", fn, err)
continue
}
sum := sha256.Sum256(contents)
str := hex.EncodeToString(sum[:]) + ".ply"
fmt.Printf("s/%s/%s/g\n", fn, str)
err = os.Rename(fn, str)
if err != nil {
fmt.Fprintf(os.Stderr, "%s: %v", fn, err)
}
}
}

The pbrt geometry file that --toply emitted was then updated to use the
hashed file names generated by the go program:

% sed -f out.sed < ply-geometry.pbrt > g.pbrt

Note that the sed script has thousands of lines and sed seems to be quite
slow--it takes many minutes to run the sed script, even though the geometry
file is only around 4.5MB.

To add all of the light sources, use the lights.sed script:

% sed -f lights.sed < g.pbrt > g-lights.pbrt

Finally, rename g-lights.pbrt to something sensible and update the Include
in the main pbrt file for the frame to use it. More generally, replace
everything after the Film directive in the generated pbrt file up to the
geometry Include with the text from one of the other frame files.

Whew