GameDevArea/wgpu-rs
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[INSTANCE] Update instances

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This commit is contained in:
Florian RICHER 2022-06-14 13:08:10 +02:00
parent ba226db6e5
commit d9e8b96754
1 changed files with 20 additions and 1 deletions
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21
engine_core/src/state.rs
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@ -35,6 +35,9 @@ const INSTANCE_DISPLACEMENT: cgmath::Vector3<f32> = cgmath::Vector3::new(
NUM_INSTANCES_PER_ROW as f32 * 0.5,
);
const FRAME_TIME: f32 = 1.0 / 60.0;
const ROTATION_SPEED: f32 = std::f32::consts::PI * FRAME_TIME * 0.5;
pub struct State {
pub surface: wgpu::Surface,
pub device: wgpu::Device,
@ -310,7 +313,7 @@ impl State {
let instance_buffer = device.create_buffer_init(&wgpu::util::BufferInitDescriptor {
label: Some("Instance Buffer"),
contents: bytemuck::cast_slice(&instance_data),
usage: wgpu::BufferUsages::VERTEX,
usage: wgpu::BufferUsages::VERTEX | wgpu::BufferUsages::COPY_DST,
});
let render_pipeline = device.create_render_pipeline(&wgpu::RenderPipelineDescriptor {
@ -418,6 +421,22 @@ impl State {
0,
bytemuck::cast_slice(&[self.camera_uniform]),
);
for instance in &mut self.instances {
let amount = cgmath::Quaternion::from_angle_y(cgmath::Rad(ROTATION_SPEED));
let current = instance.rotation;
instance.rotation = amount * current;
}
let instance_data = self
.instances
.iter()
.map(super::instance::Instance::to_raw)
.collect::<Vec<_>>();
self.queue.write_buffer(
&self.instance_buffer,
0,
bytemuck::cast_slice(&instance_data),
);
}
pub fn render(&mut self) -> Result<(), wgpu::SurfaceError> {