104 lines
2.3 KiB
PHP
104 lines
2.3 KiB
PHP
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<?php
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$script = array_shift($argv);
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/* Convert Wavefront OBJ to Retarded Model Format (RMF)
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struct {
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u8 num_frames;
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u8 num_verts; // per frame
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u8 num_indices;
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struct {
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u8 x, y, z;
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} verts[num_frames * num_verts];
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struct {
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u8 a_address_inc, b_index, c_index;
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} indices[num_indices];
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} rmf_data;
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*/
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if (count($argv) < 2 || !file_exists($argv[0])) {
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die("Usage: php model_packer.php frame1.obj frame2.obj... outfile.rmf\n");
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}
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$infiles = array_slice($argv, 0, -1);
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$verts = [];
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$indices = [];
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$max = -INF;
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// Find vertices in all files
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foreach ($infiles as $file) {
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if (!file_exists($file)) {
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die("Couldn't load $file\n");
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}
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echo "Loading $file\n";
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foreach (file($file) as $line) {
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if (preg_match('#^v (.*?) (.*?) (.*?)$#', $line, $m)) {
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$v = [(float)$m[1], (float)$m[2], (float)$m[3]];
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$verts[] = $v;
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$max = max($max, abs($v[0]), abs($v[1]), abs($v[2]));
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}
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}
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}
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// Find indices in first file (we assume the layout is the same in all
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// subsequent animation frames).
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foreach (file($infiles[0]) as $line) {
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if (preg_match('#^f (\d+).*?(\d+).*?(\d+).*?$#', $line, $m)) {
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$indices[] = [((int)$m[1])-1, ((int)$m[2])-1, ((int)$m[3])-1];
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}
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}
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// Pack header
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$packed =
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pack('C', count($infiles)).
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pack('C', count($verts)/count($infiles)).
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pack('C', count($indices));
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// Pack normalized (-15, 15) vertices
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foreach ($verts as $i => $v) {
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$x = round(($v[0]/$max)*15)+15;
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$y = round(($v[1]/$max)*15)+15;
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$z = round(($v[2]/$max)*15)+15;
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// echo "Vertex $i => ($x, $y, $z)\n";
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$packed .=
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pack('C', $x).
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pack('C', $y).
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pack('C', $z);
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}
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// Pack indices w. vertex index
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$a_last_index = 0;
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foreach ($indices as $i => $f) {
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$a_address_inc = $f[0] - $a_last_index;
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if ($a_address_inc > 3) {
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die("Face $i index a increment exceeds 2 bits ($a_address_inc)\n");
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}
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$a_last_index = $f[0];
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if ($f[1] > 127 || $f[2] > 127) {
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die("Face $i index exceeds 7 bits ({$f[1]}, {$f[1]}, {$f[2]})\n");
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}
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// echo "Face $i => ({$f[1]}, {$f[1]}, {$f[2]})\n";
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// $packed .= pack('v', ($a_address_inc << 14) | ($f[1] << 7) | $f[2]);
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$packed .=
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pack('C', $a_address_inc).
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pack('C', $f[1]).
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pack('C', $f[2]);
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}
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// Write
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$packedfile = $argv[count($argv)-1];
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file_put_contents($packedfile, $packed);
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echo "Wrote $packedfile: ".
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count($infiles)." frame(s), ".
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count($verts)." verts, ".
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count($indices)." indices, ".
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strlen($packed)." bytes\n";
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