♻️ refactor: parameterize the IQM writing
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parent
0b57f1a53e
commit
d250cf12fa
153
src/main.rs
153
src/main.rs
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@ -4,6 +4,71 @@ use std::{
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};
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fn main () {
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let vertexes = [
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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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[-1.0, 1.0, 1.0],
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];
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let triangles = [
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[0, 2, 1],
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[0, 3, 2],
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[0, 5, 1],
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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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[1, 5, 6],
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[2, 6, 7],
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[3, 7, 4],
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[4, 6, 5],
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[4, 7, 6],
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];
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let num_vertexes = u32::try_from (vertexes.len ()).unwrap ();
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let num_triangles = u32::try_from (triangles.len ()).unwrap ();
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let mut texts = Vec::default ();
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let mesh = iqm::Mesh {
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name: u32::try_from (texts.len ()).unwrap (),
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material: 0,
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first_vertex: 0,
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num_vertexes,
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first_triangle: 0,
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num_triangles,
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};
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texts.push ("Cube");
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let meshes = vec! [
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mesh,
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];
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let num_text: usize = texts.iter ()
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.map (|s| s.len () + 1)
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.sum ();
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let num_text = u32::try_from (num_text).unwrap ();
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let num_meshes = u32::try_from (meshes.len ()).unwrap ();
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let num_vertexarrays = 1u32;
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let header_len = 124u32;
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let ofs_meshes = header_len;
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let ofs_vertexarrays = ofs_meshes + num_meshes * 6 * 4;
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let ofs_triangles = ofs_vertexarrays + num_vertexarrays * 5 * 4 + num_vertexes * 3 * 4;
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let ofs_text = ofs_triangles + num_triangles * 3 * 4;
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let filesize = ofs_text + num_text;
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let mut f = File::create ("cube.iqm").unwrap ();
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f.write_all (b"INTERQUAKEMODEL\0").unwrap ();
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@ -11,27 +76,27 @@ fn main () {
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f.write_all (&(2u32.to_le_bytes ())).unwrap ();
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// filesize
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f.write_all (&(0x198u32.to_le_bytes ())).unwrap ();
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f.write_all (&(filesize.to_le_bytes ())).unwrap ();
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// flags
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f.write_all (&(0u32.to_le_bytes ())).unwrap ();
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// num_text, ofs_text
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f.write_all (&(0u32.to_le_bytes ())).unwrap ();
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f.write_all (&(0u32.to_le_bytes ())).unwrap ();
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f.write_all (&(num_text.to_le_bytes ())).unwrap ();
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f.write_all (&(ofs_text.to_le_bytes ())).unwrap ();
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// num_meshes, ofs_meshes
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f.write_all (&(1u32.to_le_bytes ())).unwrap ();
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f.write_all (&(0x7Cu32.to_le_bytes ())).unwrap ();
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f.write_all (&(num_meshes.to_le_bytes ())).unwrap ();
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f.write_all (&(ofs_meshes.to_le_bytes ())).unwrap ();
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// num_vertexarrays, num_vertexes, ofs_vertexarrays
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f.write_all (&(1u32.to_le_bytes ())).unwrap ();
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f.write_all (&(8u32.to_le_bytes ())).unwrap ();
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f.write_all (&(0x94u32.to_le_bytes ())).unwrap ();
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f.write_all (&(num_vertexarrays.to_le_bytes ())).unwrap ();
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f.write_all (&(num_vertexes.to_le_bytes ())).unwrap ();
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f.write_all (&(ofs_vertexarrays.to_le_bytes ())).unwrap ();
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// num_triangles, ofs_triangles, ofs_adjacency
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f.write_all (&(1u32.to_le_bytes ())).unwrap ();
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f.write_all (&(0x108u32.to_le_bytes ())).unwrap ();
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f.write_all (&(num_triangles.to_le_bytes ())).unwrap ();
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f.write_all (&(ofs_triangles.to_le_bytes ())).unwrap ();
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f.write_all (&(0u32.to_le_bytes ())).unwrap ();
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// num_joints, ofs_joints
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@ -62,19 +127,14 @@ fn main () {
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// Meshes
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// name
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f.write_all (&(0u32.to_le_bytes ())).unwrap ();
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// material
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f.write_all (&(0u32.to_le_bytes ())).unwrap ();
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// first_vertex, num_vertexes
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f.write_all (&(0u32.to_le_bytes ())).unwrap ();
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f.write_all (&(8u32.to_le_bytes ())).unwrap ();
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// first_triangle, num_triangles
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f.write_all (&(0u32.to_le_bytes ())).unwrap ();
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f.write_all (&(12u32.to_le_bytes ())).unwrap ();
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for mesh in meshes {
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f.write_all (&(mesh.name.to_le_bytes ())).unwrap ();
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f.write_all (&(mesh.material.to_le_bytes ())).unwrap ();
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f.write_all (&(mesh.first_vertex.to_le_bytes ())).unwrap ();
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f.write_all (&(mesh.num_vertexes.to_le_bytes ())).unwrap ();
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f.write_all (&(mesh.first_triangle.to_le_bytes ())).unwrap ();
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f.write_all (&(mesh.num_triangles.to_le_bytes ())).unwrap ();
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}
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// Vertex arrays
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@ -95,17 +155,7 @@ fn main () {
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// Vertexes
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for t in [
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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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[-1.0, 1.0, 1.0],
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] {
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for t in vertexes {
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for x in t {
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f.write_all (&(f32::to_le_bytes (x))).unwrap ();
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}
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@ -113,30 +163,31 @@ fn main () {
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// Triangles
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for t in [
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[0, 2, 1],
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[0, 3, 2],
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[0, 5, 1],
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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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[1, 5, 6],
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[2, 6, 7],
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[3, 7, 4],
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[4, 6, 5],
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[4, 7, 6],
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] {
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for t in triangles {
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for x in t {
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f.write_all (&(u32::to_le_bytes (x))).unwrap ();
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}
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}
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// Text
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for s in texts {
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f.write_all (s.as_bytes ()).unwrap ();
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f.write_all (b"\0").unwrap ();
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}
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}
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/// IQM structures as written to disk
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mod iqm {
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pub struct Mesh {
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pub name: u32,
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pub material: u32,
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pub first_vertex: u32,
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pub num_vertexes: u32,
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pub first_triangle: u32,
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pub num_triangles: u32,
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}
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struct VertexArray {
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r#type: u32,
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flags: u32,
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