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rewrite model generation to use indexed rendering

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This commit is contained in:
Quaternions 2023-09-07 16:03:51 -07:00
parent e28e94e4c9
commit 5e235b97df
1 changed files with 38 additions and 14 deletions
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48
src/main.rs
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@ -254,7 +254,6 @@ impl strafe_client::framework::Example for Skybox {
continue;
}
//simply draw a box
let mut vertices = Vec::new();
let face_data = [
[0.0f32, 0., 1.],
[0.0f32, 0., -1.],
@ -263,6 +262,12 @@ impl strafe_client::framework::Example for Skybox {
[0.0f32, 1., 0.],
[0.0f32, -1., 0.],
];
let texture_data = [
[1.0f32, 0.],
[0.0f32, 0.],
[0.0f32, 1.],
[1.0f32, 1.],
];
let vertex_data = [
// top (0, 0, 1)
[-1.0f32, -1., 1.],
@ -295,42 +300,61 @@ impl strafe_client::framework::Example for Skybox {
[-1.0f32, -1., -1.],
[1.0f32, -1., -1.],
];
let mut indices = Vec::new();
let mut vertices = Vec::new();
let mut vertex_index = std::collections::HashMap::<usize,u16>::new();
for face in 0..6 {
for end_index in 2..4 {
for &index in &[0, end_index - 1, end_index] {
let vert = face*4+index;
let unique_id=vert * 1<<0 + index * 1<<8 + face * 1<<16;
if let Some(&i)=vertex_index.get(&unique_id){
indices.push(i as u16);
}else{
let i=vertices.len() as u16;
vertices.push(Vertex {
pos: vertex_data[face*4+index],
pos: vertex_data[vert],
texture: texture_data[index],
normal: face_data[face],
})
});
vertex_index.insert(unique_id,i);
indices.push(i);
}
}
}
}
let index_buf = device.create_buffer_init(&wgpu::util::BufferInitDescriptor {
label: Some("Index"),
contents: bytemuck::cast_slice(&indices),
usage: wgpu::BufferUsages::INDEX,
});
let mut entities = Vec::<Entity>::new();
entities.push(Entity {
index_buf,
index_count: indices.len() as u32,
});
let vertex_buf = device.create_buffer_init(&wgpu::util::BufferInitDescriptor {
label: Some("Vertex"),
contents: bytemuck::cast_slice(&vertices),
usage: wgpu::BufferUsages::VERTEX,
});
let mut entities = Vec::<Entity>::new();
entities.push(Entity {
vertex_count: vertices.len() as u32,
vertex_buf,
});
modeldatas.push(ModelData {
transform: glam::Affine3A::from_translation(
transform: glam::Mat4::from_translation(
glam::Vec3::new(cf.position.x,cf.position.y-13f32,cf.position.z)
)
* glam::Affine3A::from_mat3(
* glam::Mat4::from_mat3(
glam::Mat3::from_cols(
glam::Vec3::new(cf.orientation.x.x,cf.orientation.x.y,cf.orientation.x.z),
glam::Vec3::new(cf.orientation.y.x,cf.orientation.y.y,cf.orientation.y.z),
glam::Vec3::new(cf.orientation.z.x,cf.orientation.z.y,cf.orientation.z.z),
),
)
* glam::Affine3A::from_scale(
* glam::Mat4::from_scale(
glam::Vec3::new(size.x,size.y,size.z)/2.0
),
vertex_buf,
entities,
})
});
}
}
},