converting a very simple two-mesh GLB to IQM
_
parent
d250cf12fa
commit
ce29ce6ad1
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@ -2,15 +2,292 @@
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# It is not intended for manual editing.
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# It is not intended for manual editing.
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name = "adler32"
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[[package]]
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[[package]]
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name = "byteorder"
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[[package]]
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name = "cfg-if"
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[[package]]
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name = "color_quant"
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name = "crc32fast"
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checksum = "b540bd8bc810d3885c6ea91e2018302f68baba2129ab3e88f32389ee9370880d"
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dependencies = [
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"cfg-if",
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]
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[[package]]
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name = "deflate"
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version = "0.8.6"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "73770f8e1fe7d64df17ca66ad28994a0a623ea497fa69486e14984e715c5d174"
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dependencies = [
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"adler32",
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"byteorder",
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]
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[[package]]
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name = "glam"
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version = "0.20.2"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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[[package]]
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name = "gltf"
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version = "1.0.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "00e0a0eace786193fc83644907097285396360e9e82e30f81a21e9b1ba836a3e"
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dependencies = [
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"base64",
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"byteorder",
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"gltf-json",
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"image",
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"lazy_static",
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]
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[[package]]
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name = "gltf-derive"
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version = "1.0.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "bdd53d6e284bb2bf02a6926e4cc4984978c1990914d6cd9deae4e31cf37cd113"
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dependencies = [
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"inflections",
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"proc-macro2",
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"quote",
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"syn",
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]
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[[package]]
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name = "gltf-json"
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version = "1.0.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "9949836a9ec5e7f83f76fb9bbcbc77f254a577ebbdb0820867bc11979ef97cad"
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dependencies = [
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"gltf-derive",
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"serde",
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"serde_derive",
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"serde_json",
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]
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[[package]]
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name = "image"
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version = "0.23.14"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "24ffcb7e7244a9bf19d35bf2883b9c080c4ced3c07a9895572178cdb8f13f6a1"
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dependencies = [
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"bytemuck",
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"byteorder",
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"color_quant",
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"jpeg-decoder",
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"num-iter",
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"num-rational",
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"num-traits",
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"png",
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]
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name = "inflections"
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version = "1.1.1"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "a257582fdcde896fd96463bf2d40eefea0580021c0712a0e2b028b60b47a837a"
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name = "itoa"
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version = "1.0.1"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "1aab8fc367588b89dcee83ab0fd66b72b50b72fa1904d7095045ace2b0c81c35"
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[[package]]
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name = "jpeg-decoder"
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version = "0.1.22"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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[[package]]
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name = "lazy_static"
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name = "miniz_oxide"
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checksum = "791daaae1ed6889560f8c4359194f56648355540573244a5448a83ba1ecc7435"
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dependencies = [
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"adler32",
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]
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[[package]]
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name = "model_converter"
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name = "model_converter"
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version = "0.1.0"
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version = "0.1.0"
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dependencies = [
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dependencies = [
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"byteorder",
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"byteorder",
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"glam",
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"gltf",
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]
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]
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[[package]]
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name = "num-integer"
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version = "0.1.44"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "d2cc698a63b549a70bc047073d2949cce27cd1c7b0a4a862d08a8031bc2801db"
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dependencies = [
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"autocfg",
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"num-traits",
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]
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[[package]]
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name = "num-iter"
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version = "0.1.42"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "b2021c8337a54d21aca0d59a92577a029af9431cb59b909b03252b9c164fad59"
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dependencies = [
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"autocfg",
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"num-integer",
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"num-traits",
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]
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[[package]]
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name = "num-rational"
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version = "0.3.2"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "12ac428b1cb17fce6f731001d307d351ec70a6d202fc2e60f7d4c5e42d8f4f07"
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dependencies = [
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"autocfg",
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"num-integer",
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"num-traits",
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]
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[[package]]
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name = "num-traits"
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version = "0.2.14"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "9a64b1ec5cda2586e284722486d802acf1f7dbdc623e2bfc57e65ca1cd099290"
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dependencies = [
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"autocfg",
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]
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[[package]]
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name = "png"
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version = "0.16.8"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "3c3287920cb847dee3de33d301c463fba14dda99db24214ddf93f83d3021f4c6"
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dependencies = [
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"bitflags",
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"crc32fast",
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"deflate",
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"miniz_oxide",
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]
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[[package]]
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name = "proc-macro2"
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version = "1.0.36"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "c7342d5883fbccae1cc37a2353b09c87c9b0f3afd73f5fb9bba687a1f733b029"
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dependencies = [
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"unicode-xid",
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]
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[[package]]
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name = "quote"
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version = "1.0.15"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "864d3e96a899863136fc6e99f3d7cae289dafe43bf2c5ac19b70df7210c0a145"
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dependencies = [
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"proc-macro2",
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]
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[[package]]
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name = "ryu"
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version = "1.0.9"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "73b4b750c782965c211b42f022f59af1fbceabdd026623714f104152f1ec149f"
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[[package]]
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name = "serde"
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version = "1.0.136"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "ce31e24b01e1e524df96f1c2fdd054405f8d7376249a5110886fb4b658484789"
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[[package]]
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name = "serde_derive"
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version = "1.0.136"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "08597e7152fcd306f41838ed3e37be9eaeed2b61c42e2117266a554fab4662f9"
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dependencies = [
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"proc-macro2",
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"quote",
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"syn",
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]
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[[package]]
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name = "serde_json"
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version = "1.0.79"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "8e8d9fa5c3b304765ce1fd9c4c8a3de2c8db365a5b91be52f186efc675681d95"
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dependencies = [
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"itoa",
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"ryu",
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"serde",
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]
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[[package]]
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name = "syn"
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version = "1.0.86"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "8a65b3f4ffa0092e9887669db0eae07941f023991ab58ea44da8fe8e2d511c6b"
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dependencies = [
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"proc-macro2",
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"quote",
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"unicode-xid",
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]
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[[package]]
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name = "unicode-xid"
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version = "0.2.2"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "8ccb82d61f80a663efe1f787a51b16b5a51e3314d6ac365b08639f52387b33f3"
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@ -7,3 +7,5 @@ edition = "2021"
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[dependencies]
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[dependencies]
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byteorder = "1.4.3"
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byteorder = "1.4.3"
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glam = "0.20.2"
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gltf = "1.0.0"
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155
src/main.rs
155
src/main.rs
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@ -3,59 +3,111 @@ use std::{
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io::Write,
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io::Write,
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};
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};
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use glam::{
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Mat4,
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Vec3,
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};
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fn main () {
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fn main () {
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let vertexes = [
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let (document, buffers, _images) = gltf::import ("input.glb").unwrap ();
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[-1.0, -1.0, -1.0],
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let buffer = buffers.get (0).unwrap ();
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[ 1.0, -1.0, -1.0],
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[ 1.0, 1.0, -1.0],
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[-1.0, 1.0, -1.0],
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[-1.0, -1.0, 1.0],
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[ 1.0, -1.0, 1.0],
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[ 1.0, 1.0, 1.0],
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[-1.0, 1.0, 1.0],
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];
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let triangles = [
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let mut vertexes = Vec::default ();
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[0, 2, 1],
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let mut triangles = Vec::default ();
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[0, 3, 2],
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let mut meshes = Vec::default ();
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let mut texts = String::default ();
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for node in document.nodes () {
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let mesh = match node.mesh () {
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None => continue,
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Some (x) => x,
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};
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[0, 5, 1],
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let m = gltf_node_get_mat4 (&node);
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[1, 6, 2],
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[2, 7, 3],
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[3, 4, 0],
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[0, 4, 5],
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for prim in mesh.primitives () {
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[1, 5, 6],
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assert_eq! (prim.mode (), gltf::mesh::Mode::Triangles);
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[2, 6, 7],
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[3, 7, 4],
|
let indices = prim.indices ().unwrap ();
|
||||||
|
let indices_view = indices.view ().unwrap ();
|
||||||
[4, 6, 5],
|
let indices_offset = indices.offset () + indices_view.offset ();
|
||||||
[4, 7, 6],
|
let indices_slice = &buffer [indices_offset..(indices_offset + indices.count () * 2)];
|
||||||
];
|
|
||||||
|
let pos = prim.get (&gltf::Semantic::Positions).unwrap ();
|
||||||
|
let pos_view = pos.view ().unwrap ();
|
||||||
|
let pos_offset = pos.offset () + pos_view.offset ();
|
||||||
|
let pos_slice = &buffer [pos_offset..(pos_offset + pos.count () * 4 * 3)];
|
||||||
|
|
||||||
|
let first_vertex = vertexes.len ();
|
||||||
|
|
||||||
|
let mesh = iqm::Mesh {
|
||||||
|
name: u32::try_from (texts.len ()).unwrap (),
|
||||||
|
material: 0,
|
||||||
|
first_vertex: u32::try_from (first_vertex).unwrap (),
|
||||||
|
num_vertexes: u32::try_from (indices_slice.len () / 2).unwrap (),
|
||||||
|
// num_vertexes: u32::try_from (3).unwrap (),
|
||||||
|
first_triangle: u32::try_from (triangles.len ()).unwrap (),
|
||||||
|
num_triangles: u32::try_from (indices_slice.len () / 6).unwrap (),
|
||||||
|
//num_triangles: u32::try_from (1).unwrap (),
|
||||||
|
};
|
||||||
|
texts.push_str ("\0");
|
||||||
|
|
||||||
|
meshes.push (mesh);
|
||||||
|
|
||||||
|
for chunk in indices_slice.chunks_exact (2 * 3) {
|
||||||
|
let read_idx = |i: usize| u16::from_le_bytes ([chunk [i * 2 + 0], chunk [i * 2 + 1]]);
|
||||||
|
|
||||||
|
let idxs = [
|
||||||
|
read_idx (0),
|
||||||
|
read_idx (1),
|
||||||
|
read_idx (2),
|
||||||
|
];
|
||||||
|
|
||||||
|
let read_pos_coord = |i| f32::from_le_bytes ([
|
||||||
|
pos_slice [i * 4 + 0],
|
||||||
|
pos_slice [i * 4 + 1],
|
||||||
|
pos_slice [i * 4 + 2],
|
||||||
|
pos_slice [i * 4 + 3],
|
||||||
|
]);
|
||||||
|
|
||||||
|
let read_pos = move |i| {
|
||||||
|
let i = usize::try_from (i).unwrap ();
|
||||||
|
m.transform_point3 (Vec3::new (
|
||||||
|
read_pos_coord (i * 3 + 0),
|
||||||
|
read_pos_coord (i * 3 + 1),
|
||||||
|
read_pos_coord (i * 3 + 2),
|
||||||
|
))
|
||||||
|
};
|
||||||
|
|
||||||
|
let verts = [
|
||||||
|
read_pos (idxs [0]),
|
||||||
|
read_pos (idxs [2]),
|
||||||
|
read_pos (idxs [1]),
|
||||||
|
];
|
||||||
|
|
||||||
|
let tri_start = u32::try_from (vertexes.len ()).unwrap ();
|
||||||
|
triangles.push ([
|
||||||
|
tri_start + 0,
|
||||||
|
tri_start + 1,
|
||||||
|
tri_start + 2,
|
||||||
|
]);
|
||||||
|
|
||||||
|
for v in verts {
|
||||||
|
vertexes.push (v.to_array ());
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
let vertexes = vertexes;
|
||||||
|
let triangles = triangles;
|
||||||
|
let meshes = meshes;
|
||||||
|
let texts = texts;
|
||||||
|
|
||||||
let num_vertexes = u32::try_from (vertexes.len ()).unwrap ();
|
let num_vertexes = u32::try_from (vertexes.len ()).unwrap ();
|
||||||
let num_triangles = u32::try_from (triangles.len ()).unwrap ();
|
let num_triangles = u32::try_from (triangles.len ()).unwrap ();
|
||||||
|
|
||||||
let mut texts = Vec::default ();
|
let num_text = texts.len ();
|
||||||
|
|
||||||
let mesh = iqm::Mesh {
|
|
||||||
name: u32::try_from (texts.len ()).unwrap (),
|
|
||||||
material: 0,
|
|
||||||
first_vertex: 0,
|
|
||||||
num_vertexes,
|
|
||||||
first_triangle: 0,
|
|
||||||
num_triangles,
|
|
||||||
};
|
|
||||||
texts.push ("Cube");
|
|
||||||
|
|
||||||
let meshes = vec! [
|
|
||||||
mesh,
|
|
||||||
];
|
|
||||||
|
|
||||||
let num_text: usize = texts.iter ()
|
|
||||||
.map (|s| s.len () + 1)
|
|
||||||
.sum ();
|
|
||||||
let num_text = u32::try_from (num_text).unwrap ();
|
let num_text = u32::try_from (num_text).unwrap ();
|
||||||
|
|
||||||
let num_meshes = u32::try_from (meshes.len ()).unwrap ();
|
let num_meshes = u32::try_from (meshes.len ()).unwrap ();
|
||||||
|
|
@ -69,7 +121,7 @@ fn main () {
|
||||||
|
|
||||||
let filesize = ofs_text + num_text;
|
let filesize = ofs_text + num_text;
|
||||||
|
|
||||||
let mut f = File::create ("cube.iqm").unwrap ();
|
let mut f = File::create ("output.iqm").unwrap ();
|
||||||
|
|
||||||
f.write_all (b"INTERQUAKEMODEL\0").unwrap ();
|
f.write_all (b"INTERQUAKEMODEL\0").unwrap ();
|
||||||
|
|
||||||
|
|
@ -151,7 +203,7 @@ fn main () {
|
||||||
f.write_all (&(3u32.to_le_bytes ())).unwrap ();
|
f.write_all (&(3u32.to_le_bytes ())).unwrap ();
|
||||||
|
|
||||||
// offset
|
// offset
|
||||||
f.write_all (&(0xA8u32.to_le_bytes ())).unwrap ();
|
f.write_all (&((ofs_vertexarrays + 5 * 4 * 1).to_le_bytes ())).unwrap ();
|
||||||
|
|
||||||
// Vertexes
|
// Vertexes
|
||||||
|
|
||||||
|
|
@ -170,10 +222,11 @@ fn main () {
|
||||||
}
|
}
|
||||||
|
|
||||||
// Text
|
// Text
|
||||||
for s in texts {
|
f.write_all (texts.as_bytes ()).unwrap ();
|
||||||
f.write_all (s.as_bytes ()).unwrap ();
|
}
|
||||||
f.write_all (b"\0").unwrap ();
|
|
||||||
}
|
fn gltf_node_get_mat4 (node: &gltf::Node) -> Mat4 {
|
||||||
|
Mat4::from_cols_array_2d (&node.transform ().matrix ())
|
||||||
}
|
}
|
||||||
|
|
||||||
/// IQM structures as written to disk
|
/// IQM structures as written to disk
|
||||||
|
|
|
||||||
Loading…
Reference in New Issue