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instanced rendering

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This commit is contained in:
Quaternions 2023-09-20 13:03:25 -07:00
parent d16485ae6d
commit 7e427b3879
2 changed files with 27 additions and 18 deletions
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36
src/main.rs
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@ -19,13 +19,13 @@ struct Entity {
//temp?
struct ModelData {
transform: glam::Mat4,
transforms: Vec<glam::Mat4>,
vertex_buf: wgpu::Buffer,
entities: Vec<Entity>,
}
struct ModelGraphics {
transform: glam::Mat4,
transforms: Vec<glam::Mat4>,
vertex_buf: wgpu::Buffer,
entities: Vec<Entity>,
bind_group: wgpu::BindGroup,
@ -152,9 +152,13 @@ impl Skybox {
}
}
fn get_transform_uniform_data(transform:&glam::Mat4) -> [f32; 4*4] {
let mut raw = [0f32; 4*4];
raw[0..16].copy_from_slice(&AsRef::<[f32; 4*4]>::as_ref(transform)[..]);
fn get_transform_uniform_data(transforms:&Vec<glam::Mat4>) -> Vec<f32> {
let mut raw = Vec::with_capacity(4*4*transforms.len());
for (i,t) in transforms.iter().enumerate(){
let mut v = raw.split_off(4*4*i);
raw.extend_from_slice(&AsRef::<[f32; 4*4]>::as_ref(t)[..]);
raw.append(&mut v);
}
raw
}
@ -200,7 +204,7 @@ fn add_obj(device:&wgpu::Device,modeldatas:& mut Vec<ModelData>,data:obj::ObjDat
usage: wgpu::BufferUsages::VERTEX,
});
modeldatas.push(ModelData {
transform: glam::Mat4::default(),
transforms: vec![glam::Mat4::default()],
vertex_buf,
entities,
})
@ -246,9 +250,13 @@ impl strafe_client::framework::Example for Skybox {
add_obj(device,& mut modeldatas,obj::ObjData::load_buf(&include_bytes!("../models/teapot.obj")[..]).unwrap());
add_obj(device,& mut modeldatas,ground);
println!("models.len = {:?}", modeldatas.len());
modeldatas[1].transform=glam::Mat4::from_translation(glam::vec3(10.,5.,10.));
modeldatas[2].transform=glam::Mat4::from_translation(glam::vec3(-10.,5.,10.));
modeldatas[3].transform=glam::Mat4::from_translation(glam::vec3(0.,-10.,0.))*glam::Mat4::from_scale(glam::vec3(160.0, 1.0, 160.0));
modeldatas[0].transforms[0]=glam::Mat4::from_translation(glam::vec3(10.,0.,-10.));
modeldatas[1].transforms[0]=glam::Mat4::from_translation(glam::vec3(10.,5.,10.));
modeldatas[1].transforms.push(glam::Mat4::from_translation(glam::vec3(20.,5.,10.)));
modeldatas[1].transforms.push(glam::Mat4::from_translation(glam::vec3(10.,5.,20.)));
modeldatas[1].transforms.push(glam::Mat4::from_translation(glam::vec3(20.,5.,20.)));
modeldatas[2].transforms[0]=glam::Mat4::from_translation(glam::vec3(-10.,5.,10.));
modeldatas[3].transforms[0]=glam::Mat4::from_translation(glam::vec3(0.,0.,0.))*glam::Mat4::from_scale(glam::vec3(160.0, 1.0, 160.0));
let main_bind_group_layout = device.create_bind_group_layout(&wgpu::BindGroupLayoutDescriptor {
label: None,
@ -326,7 +334,7 @@ impl strafe_client::framework::Example for Skybox {
temp_control_dir: glam::Vec3::ZERO,
walkspeed: 18.0,
contacts: std::collections::HashSet::new(),
models_cringe_clone: modeldatas.iter().map(|m|strafe_client::body::Model::new(m.transform)).collect(),
models_cringe_clone: modeldatas.iter().map(|m|m.transforms.iter().map(|t|strafe_client::body::Model::new(*t))).flatten().collect(),
walk: strafe_client::body::WalkState::new(),
hitbox_halfsize: glam::vec3(1.0,2.5,1.0),
};
@ -341,7 +349,7 @@ impl strafe_client::framework::Example for Skybox {
//drain the modeldata vec so entities can be /moved/ to models.entities
let mut models = Vec::<ModelGraphics>::with_capacity(modeldatas.len());
for (i,modeldata) in modeldatas.drain(..).enumerate() {
let model_uniforms = get_transform_uniform_data(&modeldata.transform);
let model_uniforms = get_transform_uniform_data(&modeldata.transforms);
let model_buf = device.create_buffer_init(&wgpu::util::BufferInitDescriptor {
label: Some(format!("ModelGraphics{}",i).as_str()),
contents: bytemuck::cast_slice(&model_uniforms),
@ -359,7 +367,7 @@ impl strafe_client::framework::Example for Skybox {
});
//all of these are being moved here
models.push(ModelGraphics{
transform: modeldata.transform,
transforms: modeldata.transforms,
vertex_buf:modeldata.vertex_buf,
entities: modeldata.entities,
bind_group: model_bind_group,
@ -675,7 +683,7 @@ impl strafe_client::framework::Example for Skybox {
.copy_from_slice(bytemuck::cast_slice(&camera_uniforms));
//This code only needs to run when the uniforms change
for model in self.models.iter() {
let model_uniforms = get_transform_uniform_data(&model.transform);
let model_uniforms = get_transform_uniform_data(&model.transforms);
self.staging_belt
.write_buffer(
&mut encoder,
@ -723,7 +731,7 @@ impl strafe_client::framework::Example for Skybox {
for entity in model.entities.iter() {
rpass.set_index_buffer(entity.index_buf.slice(..), wgpu::IndexFormat::Uint16);
rpass.draw_indexed(0..entity.index_count, 0, 0..1);
rpass.draw_indexed(0..entity.index_count, 0, 0..model.transforms.len() as u32);
}
}

9
src/shader.wgsl
View File

@ -45,20 +45,21 @@ struct EntityOutput {
@location(2) normal: vec3<f32>,
@location(3) view: vec3<f32>,
};
const MAX_ENTITY_INSTANCES=1024;
@group(1)
@binding(0)
var<uniform> r_EntityTransform: mat4x4<f32>;
var<uniform> r_EntityTransform: array<mat4x4<f32>,MAX_ENTITY_INSTANCES>;
@vertex
fn vs_entity(
@builtin(instance_index) instance: u32,
@location(0) pos: vec3<f32>,
@location(1) texture: vec2<f32>,
@location(2) normal: vec3<f32>,
) -> EntityOutput {
var position: vec4<f32> = r_EntityTransform * vec4<f32>(pos, 1.0);
var position: vec4<f32> = r_EntityTransform[instance] * vec4<f32>(pos, 1.0);
var result: EntityOutput;
result.normal = (r_EntityTransform * vec4<f32>(normal, 0.0)).xyz;
result.normal = (r_EntityTransform[instance] * vec4<f32>(normal, 0.0)).xyz;
result.texture=texture;
result.view = position.xyz - r_data.cam_pos.xyz;
result.position = r_data.proj * r_data.view * position;