--wip-- [skip ci]

tape-drive/src/main.rs

@@ -1002,6 +1002,7 @@ impl ApplicationHandler for App {
             &self.pipeline_cache,
             &shader_modules,
             &self.gstate.debug,
+            &self.gstate.csg,
         );
 
         let scene = Scene::new(
@@ -1878,6 +1879,7 @@ impl App {
             &self.pipeline_cache,
             &rcx.shader_modules,
             &self.gstate.debug,
+            &self.gstate.csg,
         );
 
         while csg_pipelines_left > 0 {
@@ -2713,6 +2715,7 @@ fn pipeline_recompile(
     cache: &Arc<PipelineCache>,
     shader_modules: &Arc<RwLock<HashMap<String, Arc<ShaderModule>>>>,
     debug: &PreviousDebug,
+    csgs: &[Arc<RwLock<CSG>>],
 ) -> (
     Arc<GraphicsPipeline>,
     Arc<RayTracingPipeline>,
@@ -2805,15 +2808,32 @@ fn pipeline_recompile(
             .unwrap();
 
         // Make a list of the shader stages that the pipeline will have.
-        let stages = [
-            &PipelineShaderStageCreateInfo::new(raygen),
-            &PipelineShaderStageCreateInfo::new(miss),
-            &PipelineShaderStageCreateInfo::new(closest_hit),
+        let mut stages = vec![
+            PipelineShaderStageCreateInfo::new(raygen),
+            PipelineShaderStageCreateInfo::new(miss),
+            PipelineShaderStageCreateInfo::new(closest_hit),
         ];
 
+        for csg in csgs {
+            let csg = csg.read().unwrap();
+            let rps = csg.replacement_modules.read().unwrap();
+            let hit = rps["normals.rchit"]
+                .specialize(specs.clone())
+                .unwrap()
+                .single_entry_point()
+                .unwrap();
+            stages.push(PipelineShaderStageCreateInfo::new(hit));
+            let intersection = rps["trace.rint"]
+                .specialize(specs.clone())
+                .unwrap()
+                .single_entry_point()
+                .unwrap();
+            stages.push(PipelineShaderStageCreateInfo::new(intersection));
+        }
+
         let layout = PipelineLayout::new(
             device.clone(),
-            PipelineDescriptorSetLayoutCreateInfo::from_stages(stages)
+            PipelineDescriptorSetLayoutCreateInfo::from_stages(stages.iter())
                 .into_pipeline_layout_create_info(device.clone())
                 .unwrap(),
         )
@@ -2822,7 +2842,7 @@ fn pipeline_recompile(
         // Define the shader groups that will eventually turn into the shader binding
         // table. The numbers are the indices of the stages in the `stages`
         // array.
-        let groups = [
+        let mut groups = vec![
             RayTracingShaderGroupCreateInfo::General { general_shader: 0 },
             RayTracingShaderGroupCreateInfo::General { general_shader: 1 },
             RayTracingShaderGroupCreateInfo::TrianglesHit {
@@ -2831,12 +2851,20 @@ fn pipeline_recompile(
             },
         ];
 
+        for i in 0..csgs.len() {
+            groups.push(RayTracingShaderGroupCreateInfo::ProceduralHit {
+                closest_hit_shader:  Some((3 + (i * 2)) as u32),
+                any_hit_shader:      None,
+                intersection_shader: (4 + (i * 2)) as u32,
+            })
+        }
+
         RayTracingPipeline::new(
             device.clone(),
             Some(cache.clone()),
             RayTracingPipelineCreateInfo {
                 //flags: PipelineCreateFlags::DISABLE_OPTIMIZATION,
-                stages: stages.into_iter().cloned().collect(),
+                stages: stages.into_iter().collect(),
                 groups: groups.into_iter().collect(),
                 max_pipeline_ray_recursion_depth: 1,
                 //dynamic_state: dynamic_state.clone(),

tape-drive/src/scene.rs

@@ -31,7 +31,8 @@ use crate::objects::{CSG, Mesh, OVertex};
 pub struct Scene {
     // The bottom-level acceleration structure is required to be kept alive
     // as we reference it in the top-level acceleration structure.
-    pub _blases: Vec<Arc<AccelerationStructure>>,
+    pub _mesh_blases: Vec<Arc<AccelerationStructure>>,
+    pub _csg_blases:  Vec<Arc<AccelerationStructure>>,
     pub tlas:         Arc<AccelerationStructure>,
 }
 
@@ -61,7 +62,7 @@ impl Scene {
         // contains the instances of the bottom-level acceleration structures. In our
         // shader, we will trace rays against the top-level acceleration
         // structure.
-        let mut blases: Vec<Arc<AccelerationStructure>> = meshes
+        let mesh_blases: Vec<Arc<AccelerationStructure>> = meshes
             .iter()
             .map(|mesh| unsafe {
                 build_acceleration_structure_triangles(
@@ -72,7 +73,10 @@ impl Scene {
                 )
             })
             .collect();
-        blases.extend(csgs.iter().map(|csg| unsafe {
+
+        let csg_blases: Vec<Arc<AccelerationStructure>> = csgs
+            .iter()
+            .map(|csg| unsafe {
                 build_acceleration_structure_boxes(
                     csg,
                     image_index,
@@ -80,7 +84,8 @@ impl Scene {
                     device.clone(),
                     &mut builder,
                 )
-        }));
+            })
+            .collect();
 
         let blas_fence = builder
             .build()
@@ -101,7 +106,7 @@ impl Scene {
 
         let tlas = unsafe {
             build_top_level_acceleration_structure(
-                blases
+                mesh_blases
                     .iter()
                     .map(|blas| AccelerationStructureInstance {
                         instance_shader_binding_table_record_offset_and_flags: Packed24_8::new(
@@ -111,6 +116,16 @@ impl Scene {
                         acceleration_structure_reference: blas.device_address().into(),
                         ..Default::default()
                     })
+                    .chain(csg_blases.iter().enumerate().map(|(i, blas)| {
+                        AccelerationStructureInstance {
+                            instance_shader_binding_table_record_offset_and_flags: Packed24_8::new(
+                                (i + 1) as u32,
+                                (GeometryInstanceFlags::FORCE_OPAQUE).into(),
+                            ),
+                            acceleration_structure_reference: blas.device_address().into(),
+                            ..Default::default()
+                        }
+                    }))
                     .collect(),
                 memory_allocator.clone(),
                 device.clone(),
@@ -129,7 +144,8 @@ impl Scene {
             .unwrap();
 
         Scene {
-            _blases: blases,
+            _mesh_blases: mesh_blases,
+            _csg_blases: csg_blases,
             tlas,
         }
     }