initial (bad) voxel renderer

2024-06-04 12:11:28 -04:00
commit 7ae6a01949
31 changed files with 4268 additions and 0 deletions
@@ -0,0 +1,59 @@
+use wgpu::{BufferUsages, VertexAttribute};
+
+use super::buf::{ArrBuf, ArrBufUpdate, BufMove};
+
+pub struct Instances<T: bytemuck::Pod> {
+    buf: ArrBuf<T>,
+    location: u32,
+    attrs: [VertexAttribute; 1],
+}
+
+impl<T: bytemuck::Pod> Instances<T> {
+    pub fn update(
+        &mut self,
+        device: &wgpu::Device,
+        encoder: &mut wgpu::CommandEncoder,
+        belt: &mut wgpu::util::StagingBelt,
+        size: usize,
+        updates: &[ArrBufUpdate<T>],
+    ) -> bool {
+        self.buf.update(device, encoder, belt, size, updates)
+    }
+
+    pub fn init(
+        device: &wgpu::Device,
+        label: &str,
+        location: u32,
+        format: wgpu::VertexFormat,
+    ) -> Self {
+        Self {
+            buf: ArrBuf::init(
+                device,
+                &(label.to_owned() + " Instance"),
+                BufferUsages::VERTEX,
+            ),
+            location,
+            attrs: [wgpu::VertexAttribute {
+                format,
+                offset: 0,
+                shader_location: location,
+            }],
+        }
+    }
+
+    pub fn set_in<'a>(&'a self, render_pass: &mut wgpu::RenderPass<'a>) {
+        render_pass.set_vertex_buffer(self.location, self.buf.buffer().slice(..));
+    }
+
+    pub fn desc(&self) -> wgpu::VertexBufferLayout {
+        wgpu::VertexBufferLayout {
+            array_stride: std::mem::size_of::<T>() as wgpu::BufferAddress,
+            step_mode: wgpu::VertexStepMode::Instance,
+            attributes: &self.attrs,
+        }
+    }
+
+    pub fn mov(&mut self, mov: BufMove) {
+        self.buf.mov(mov);
+    }
+}