rtx: fix tlas rebuild

ref_vk/TODO.md

@@ -1,12 +1,9 @@
-## 2021-04-06..07
-- [ ] persistent models
-	- [x] load brushes into render model
-	- [x] destroy brushes when time comes (when?)
-	- [x] rasterize models in renderer
-	- [ ] rtx: build AS for model
-	- [ ] rtx: include pre-built models in TLAS
+## 2021-04-10
+- [x] rtx: fix tlas rebuild
+- [ ] rtx: upload kusochki metadata w/ leaves
 
 # Next
+- [ ] rtx: fix blas destruction on exit
 - [ ] rtx: use light visibility data
 - [ ] rtx: read rad file data
 	- [ ] rtx: hack: interpret textures with '~' or '{' as emissive
@@ -159,3 +156,13 @@
 
 ## 2021-03-28
 - [x] bake s/d-lights visibility data into bsp leaves
+
+## 2021-04-06..08
+- [x] persistent models
+	- [x] load brushes into render model
+	- [x] destroy brushes when time comes (when?)
+	- [x] rasterize models in renderer
+
+## 2021-04-09
+- [x] rtx: build AS for model
+- [x] rtx: include pre-built models in TLAS

ref_vk/vk_rtx.c

@@ -126,7 +126,10 @@ typedef struct {
 } as_build_args_t;
 
 static qboolean createOrUpdateAccelerationStructure(VkCommandBuffer cmdbuf, const as_build_args_t *args) {
-	const qboolean is_update = *args->accel != VK_NULL_HANDLE;
+	const qboolean should_create = *args->accel == VK_NULL_HANDLE;
+	const qboolean is_update = false; // TODO: can allow updates only if we know that we only touch vertex positions essentially
+	// (no geometry/instance count, flags, etc changes are allowed by the spec)
+
 	VkAccelerationStructureBuildGeometryInfoKHR build_info = {
 		.sType = VK_STRUCTURE_TYPE_ACCELERATION_STRUCTURE_BUILD_GEOMETRY_INFO_KHR,
 		.type = args->type,
@@ -163,7 +166,7 @@ static qboolean createOrUpdateAccelerationStructure(VkCommandBuffer cmdbuf, cons
 		return false;
 	}
 
-	if (*args->accel == VK_NULL_HANDLE) {
+	if (should_create) {
 		VkAccelerationStructureCreateInfoKHR asci = {
 			.sType = VK_STRUCTURE_TYPE_ACCELERATION_STRUCTURE_CREATE_INFO_KHR,
 			.buffer = g_rtx.accels_buffer.buffer,
@@ -360,8 +363,7 @@ void VK_RayFrameEnd(const vk_ray_frame_render_args_t* args)
 	}
 
 	// 2. Create TLAS
-	/* FIXME once*/
-	if (!g_rtx.tlas && g_rtx.frame.num_models > 0)
+	if (g_rtx.frame.num_models > 0)
 	{
 		const VkAccelerationStructureGeometryKHR tl_geom[] = {
 			{

ref_vk/vk_scene.c

@@ -648,7 +648,7 @@ void VK_SceneRender( const ref_viewpass_t *rvp )
 		cl_entity_t *world = gEngine.GetEntityByIndex( 0 );
 		if( world && world->model )
 		{
-			VK_LightsBakePVL( 0 /* FIXME frame number */);
+			//VK_LightsBakePVL( 0 /* FIXME frame number */);
 
 			VK_RenderStateSetColor( 1.f, 1.f, 1.f, 1.f);
 			VK_BrushModelDraw( world, kRenderNormal );