Matt Pharr f411bd77a6 Fix Object/Attribute End nesting for measure-one 1 year ago
..
geometry 0270166920 Add Zero-Day frames (from measure one) 4 years ago
spds 0270166920 Add Zero-Day frames (from measure one) 4 years ago
textures 0270166920 Add Zero-Day frames (from measure one) 4 years ago
README.txt 0270166920 Add Zero-Day frames (from measure one) 4 years ago
frame120.pbrt b69350d299 More improvements to the Measure One scenes 3 years ago
frame180.pbrt b69350d299 More improvements to the Measure One scenes 3 years ago
frame210.pbrt b69350d299 More improvements to the Measure One scenes 3 years ago
frame25.pbrt b69350d299 More improvements to the Measure One scenes 3 years ago
frame300.pbrt b69350d299 More improvements to the Measure One scenes 3 years ago
frame35.pbrt b69350d299 More improvements to the Measure One scenes 3 years ago
frame380.pbrt b69350d299 More improvements to the Measure One scenes 3 years ago
frame52.pbrt b69350d299 More improvements to the Measure One scenes 3 years ago
frame85.pbrt b69350d299 More improvements to the Measure One scenes 3 years ago
geometry-f120.pbrt f411bd77a6 Fix Object/Attribute End nesting for measure-one 1 year ago
geometry-f180.pbrt f411bd77a6 Fix Object/Attribute End nesting for measure-one 1 year ago
geometry-f210.pbrt f411bd77a6 Fix Object/Attribute End nesting for measure-one 1 year ago
geometry-f25.pbrt f411bd77a6 Fix Object/Attribute End nesting for measure-one 1 year ago
geometry-f300.pbrt f411bd77a6 Fix Object/Attribute End nesting for measure-one 1 year ago
geometry-f35.pbrt f411bd77a6 Fix Object/Attribute End nesting for measure-one 1 year ago
geometry-f380.pbrt f411bd77a6 Fix Object/Attribute End nesting for measure-one 1 year ago
geometry-f52.pbrt f411bd77a6 Fix Object/Attribute End nesting for measure-one 1 year ago
geometry-f85.pbrt 1abbabfaa1 Remove "twosided" option from measure-one emitters. 1 year ago
geometry.pbrt f411bd77a6 Fix Object/Attribute End nesting for measure-one 1 year ago
lights.sed 0270166920 Add Zero-Day frames (from measure one) 4 years ago
main.pbrt 0270166920 Add Zero-Day frames (from measure one) 4 years ago
materials.pbrt 654a13ea97 Update measure-one materials to be more energy-conserving. 3 years ago
parseass.go 0270166920 Add Zero-Day frames (from measure one) 4 years ago
textures.pbrt b69350d299 More improvements to the Measure One scenes 3 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