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fix(obj): negative indexing for vertex normals and texcoords as well

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This commit is contained in:
Illusion
2023-11-02 04:00:18 +02:00
parent 72992c2e3c
commit d10f549c83
1 changed files with 29 additions and 5 deletions
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src/importer/obj.rs
+29 -5
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@@ -290,7 +290,12 @@ pub fn load_obj(obj_path: &PathBuf, file: std::fs::File) -> Result<Object, Box<d
} else { } else {
vert -= 1; vert -= 1;
} }
let normal = it.next().unwrap().parse::<i32>().unwrap() - 1; let mut normal = it.next().unwrap().parse::<i32>().unwrap();
if normal < 0 {
normal = normals.len() as i32 + normal;
} else {
normal -= 1;
}
vertices.push(Vertex{ vertices.push(Vertex{
position: *temp_vertices.get(vert as usize).unwrap(), position: *temp_vertices.get(vert as usize).unwrap(),
normal: *normals.get(normal as usize).unwrap(), normal: *normals.get(normal as usize).unwrap(),
@@ -304,8 +309,18 @@ pub fn load_obj(obj_path: &PathBuf, file: std::fs::File) -> Result<Object, Box<d
} else { } else {
vertex -= 1; vertex -= 1;
} }
let t_coords = it.next().unwrap().parse::<i32>().unwrap() - 1; let mut t_coords = it.next().unwrap().parse::<i32>().unwrap();
let normal = it.next().unwrap().parse::<i32>().unwrap() - 1; if t_coords < 0 {
t_coords = tex_coords.len() as i32 + t_coords;
} else {
t_coords -= 1;
}
let mut normal = it.next().unwrap().parse::<i32>().unwrap();
if normal < 0 {
normal = normals.len() as i32 + normal;
} else {
normal -= 1;
}
vertices.push(Vertex{ vertices.push(Vertex{
position: *temp_vertices.get(vertex as usize).unwrap(), position: *temp_vertices.get(vertex as usize).unwrap(),
normal: *normals.get(normal as usize).unwrap(), normal: *normals.get(normal as usize).unwrap(),
@@ -319,7 +334,12 @@ pub fn load_obj(obj_path: &PathBuf, file: std::fs::File) -> Result<Object, Box<d
} else { } else {
vertex -= 1; vertex -= 1;
} }
let t_coords = it.next().unwrap().parse::<i32>().unwrap() - 1; let mut t_coords = it.next().unwrap().parse::<i32>().unwrap();
if t_coords < 0 {
t_coords = tex_coords.len() as i32 + t_coords;
} else {
t_coords -= 1;
}
vertices.push(Vertex{ vertices.push(Vertex{
position: *temp_vertices.get(vertex as usize).unwrap(), position: *temp_vertices.get(vertex as usize).unwrap(),
normal: calculated_normal, normal: calculated_normal,
@@ -339,7 +359,7 @@ pub fn load_obj(obj_path: &PathBuf, file: std::fs::File) -> Result<Object, Box<d
}); });
} }
// 2 triangles per face // Triangulate faces. 2 triangles per face
if i < face.len() - 2 { if i < face.len() - 2 {
indices.push(indices_counter); indices.push(indices_counter);
indices.push(indices_counter + i as u32 + 1); indices.push(indices_counter + i as u32 + 1);
@@ -389,9 +409,13 @@ pub fn load_obj(obj_path: &PathBuf, file: std::fs::File) -> Result<Object, Box<d
let mat_name = iter.next().unwrap_or("").to_string(); let mat_name = iter.next().unwrap_or("").to_string();
current_material = materials.get(&mat_name).cloned(); current_material = materials.get(&mat_name).cloned();
} }
// Things we ignore have a statement to not clutter the log
Some(ObjToken::Line) | Some(ObjToken::Point) => { Some(ObjToken::Line) | Some(ObjToken::Point) => {
// we don't handle lines or points // we don't handle lines or points
} }
Some(ObjToken::SmoothShading) => {
// idc about this
}
_ => { warn!("Unhandled obj token: {}", token) }, _ => { warn!("Unhandled obj token: {}", token) },
} }
} }