{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:HLFJSRJASTPGHUMH2FXUPMZ5RE","short_pith_number":"pith:HLFJSRJA","canonical_record":{"source":{"id":"1811.03510","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.GR","submitted_at":"2018-11-08T15:58:40Z","cross_cats_sorted":[],"title_canon_sha256":"17b7efed591132eabe5cd9c73b941fc53ab16d8903dc4ce5d09dfc290e6aa9a9","abstract_canon_sha256":"2bb7fa549c424c00bb923d23e041d6a44cb4132ad7d890cf2751074fcf79bbc5"},"schema_version":"1.0"},"canonical_sha256":"3aca99452094de63d187d16f47b33d8932181d48f9c3d2d542fda5d171978edb","source":{"kind":"arxiv","id":"1811.03510","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1811.03510","created_at":"2026-05-18T00:01:15Z"},{"alias_kind":"arxiv_version","alias_value":"1811.03510v1","created_at":"2026-05-18T00:01:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1811.03510","created_at":"2026-05-18T00:01:15Z"},{"alias_kind":"pith_short_12","alias_value":"HLFJSRJASTPG","created_at":"2026-05-18T12:32:28Z"},{"alias_kind":"pith_short_16","alias_value":"HLFJSRJASTPGHUMH","created_at":"2026-05-18T12:32:28Z"},{"alias_kind":"pith_short_8","alias_value":"HLFJSRJA","created_at":"2026-05-18T12:32:28Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:HLFJSRJASTPGHUMH2FXUPMZ5RE","target":"record","payload":{"canonical_record":{"source":{"id":"1811.03510","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.GR","submitted_at":"2018-11-08T15:58:40Z","cross_cats_sorted":[],"title_canon_sha256":"17b7efed591132eabe5cd9c73b941fc53ab16d8903dc4ce5d09dfc290e6aa9a9","abstract_canon_sha256":"2bb7fa549c424c00bb923d23e041d6a44cb4132ad7d890cf2751074fcf79bbc5"},"schema_version":"1.0"},"canonical_sha256":"3aca99452094de63d187d16f47b33d8932181d48f9c3d2d542fda5d171978edb","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:01:15.919269Z","signature_b64":"jXgKYKz/MGN9HmDlIb/frVqbsDGCsA7SI7UiLCwJiCBf9did9V1SZeXJ4sBzHTa50NbkQOWgCe+epgAWcA3wCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"3aca99452094de63d187d16f47b33d8932181d48f9c3d2d542fda5d171978edb","last_reissued_at":"2026-05-18T00:01:15.918668Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:01:15.918668Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1811.03510","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:01:15Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"zmGiRoH7R0oC8V8GmKZRJf7B+xCLhUD4ghcRmt7u8Dv4o09vDfqS88gohviXO1CwoAHv1rbfoZimJ8JdRs0XCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T09:31:00.736829Z"},"content_sha256":"5a9cd2b04f75cd2905e4f3c8f341c9bb407a509f98f97d8ca7c5f8a21d5c7dc8","schema_version":"1.0","event_id":"sha256:5a9cd2b04f75cd2905e4f3c8f341c9bb407a509f98f97d8ca7c5f8a21d5c7dc8"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:HLFJSRJASTPGHUMH2FXUPMZ5RE","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Massively Parallel Stackless Ray Tracing of Catmull-Clark Subdivision Surfaces","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cs.GR","authors_text":"Alexander Keller, Nikolaus Binder","submitted_at":"2018-11-08T15:58:40Z","abstract_excerpt":"We present a fast and efficient method for intersecting rays with Catmull-Clark subdivision surfaces. It takes advantage of the approximation democratized by OpenSubdiv, in which regular patches are represented by tensor product B\\'ezier surfaces and irregular ones are approximated using Gregory patches. Our algorithm operates solely on the original patch data and can process both patch types simultaneously with only a small amount of control flow divergence. Besides introducing an optimized method to determine axis aligned bounding boxes of Gregory patches restricted in the parametric domain,"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1811.03510","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:01:15Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"zBthUj/3kOiyFueLHwENIypG6NuFojD5KrZfaqqwEA99GBeecfcTswCm5xnSo/zLlXIdedenGsFoFCAxpZDCDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T09:31:00.737197Z"},"content_sha256":"75e90a6392fb2a079e15cfbc923fa974d703e13d3464f6191a97031747c80a63","schema_version":"1.0","event_id":"sha256:75e90a6392fb2a079e15cfbc923fa974d703e13d3464f6191a97031747c80a63"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/HLFJSRJASTPGHUMH2FXUPMZ5RE/bundle.json","state_url":"https://pith.science/pith/HLFJSRJASTPGHUMH2FXUPMZ5RE/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/HLFJSRJASTPGHUMH2FXUPMZ5RE/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-05-30T09:31:00Z","links":{"resolver":"https://pith.science/pith/HLFJSRJASTPGHUMH2FXUPMZ5RE","bundle":"https://pith.science/pith/HLFJSRJASTPGHUMH2FXUPMZ5RE/bundle.json","state":"https://pith.science/pith/HLFJSRJASTPGHUMH2FXUPMZ5RE/state.json","well_known_bundle":"https://pith.science/.well-known/pith/HLFJSRJASTPGHUMH2FXUPMZ5RE/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:HLFJSRJASTPGHUMH2FXUPMZ5RE","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"2bb7fa549c424c00bb923d23e041d6a44cb4132ad7d890cf2751074fcf79bbc5","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.GR","submitted_at":"2018-11-08T15:58:40Z","title_canon_sha256":"17b7efed591132eabe5cd9c73b941fc53ab16d8903dc4ce5d09dfc290e6aa9a9"},"schema_version":"1.0","source":{"id":"1811.03510","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1811.03510","created_at":"2026-05-18T00:01:15Z"},{"alias_kind":"arxiv_version","alias_value":"1811.03510v1","created_at":"2026-05-18T00:01:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1811.03510","created_at":"2026-05-18T00:01:15Z"},{"alias_kind":"pith_short_12","alias_value":"HLFJSRJASTPG","created_at":"2026-05-18T12:32:28Z"},{"alias_kind":"pith_short_16","alias_value":"HLFJSRJASTPGHUMH","created_at":"2026-05-18T12:32:28Z"},{"alias_kind":"pith_short_8","alias_value":"HLFJSRJA","created_at":"2026-05-18T12:32:28Z"}],"graph_snapshots":[{"event_id":"sha256:75e90a6392fb2a079e15cfbc923fa974d703e13d3464f6191a97031747c80a63","target":"graph","created_at":"2026-05-18T00:01:15Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"We present a fast and efficient method for intersecting rays with Catmull-Clark subdivision surfaces. It takes advantage of the approximation democratized by OpenSubdiv, in which regular patches are represented by tensor product B\\'ezier surfaces and irregular ones are approximated using Gregory patches. Our algorithm operates solely on the original patch data and can process both patch types simultaneously with only a small amount of control flow divergence. Besides introducing an optimized method to determine axis aligned bounding boxes of Gregory patches restricted in the parametric domain,","authors_text":"Alexander Keller, Nikolaus Binder","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.GR","submitted_at":"2018-11-08T15:58:40Z","title":"Massively Parallel Stackless Ray Tracing of Catmull-Clark Subdivision Surfaces"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1811.03510","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:5a9cd2b04f75cd2905e4f3c8f341c9bb407a509f98f97d8ca7c5f8a21d5c7dc8","target":"record","created_at":"2026-05-18T00:01:15Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"2bb7fa549c424c00bb923d23e041d6a44cb4132ad7d890cf2751074fcf79bbc5","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.GR","submitted_at":"2018-11-08T15:58:40Z","title_canon_sha256":"17b7efed591132eabe5cd9c73b941fc53ab16d8903dc4ce5d09dfc290e6aa9a9"},"schema_version":"1.0","source":{"id":"1811.03510","kind":"arxiv","version":1}},"canonical_sha256":"3aca99452094de63d187d16f47b33d8932181d48f9c3d2d542fda5d171978edb","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"3aca99452094de63d187d16f47b33d8932181d48f9c3d2d542fda5d171978edb","first_computed_at":"2026-05-18T00:01:15.918668Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:01:15.918668Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"jXgKYKz/MGN9HmDlIb/frVqbsDGCsA7SI7UiLCwJiCBf9did9V1SZeXJ4sBzHTa50NbkQOWgCe+epgAWcA3wCQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:01:15.919269Z","signed_message":"canonical_sha256_bytes"},"source_id":"1811.03510","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:5a9cd2b04f75cd2905e4f3c8f341c9bb407a509f98f97d8ca7c5f8a21d5c7dc8","sha256:75e90a6392fb2a079e15cfbc923fa974d703e13d3464f6191a97031747c80a63"],"state_sha256":"119d66857806fdf372ea3fcc1d0a9469d748dce3e2f71016f6eaf55e82b8a57c"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"bj+9sLpafgvJ/7TgieCBsrc0X7zXPa6QtGWsSdWLDYkM7FowOEBpUPZiPY3pWLRfA6dqqxJ9t0DglI4noKXQBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-30T09:31:00.740246Z","bundle_sha256":"c2444704db503be18e701357bd58f71dec46befe356b48a26fa5a8d6b7a88c12"}}