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2025-09-04 10:54:47 +08:00
commit 6bc8f61b18
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+/* Copyright (c) 2022-2024, NVIDIA CORPORATION. All rights reserved.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Licensed under the Apache License, Version 2.0 the "License";
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/*
+ * Instanced mesh rendering, uses a separate vertex buffer for instanced data, using vulkan.hpp
+ */
+
+#pragma once
+
+#include <hpp_api_vulkan_sample.h>
+
+#if defined(__ANDROID__)
+#	define INSTANCE_COUNT 4096
+#else
+#	define INSTANCE_COUNT 8192
+#endif
+
+class HPPInstancing : public HPPApiVulkanSample
+{
+  public:
+	HPPInstancing();
+	~HPPInstancing();
+
+  private:
+	// Contains the instanced data
+	struct InstanceBuffer
+	{
+		std::unique_ptr<vkb::core::BufferCpp> buffer;
+		vk::DescriptorBufferInfo              descriptor;
+		size_t                                size = 0;
+	};
+
+	// Per-instance data block
+	struct InstanceData
+	{
+		glm::vec3 pos;
+		glm::vec3 rot;
+		float     scale;
+		uint32_t  texIndex;
+	};
+
+	struct Model
+	{
+		vk::DescriptorSet                                         descriptor_set;
+		std::unique_ptr<vkb::scene_graph::components::HPPSubMesh> mesh;
+		vk::Pipeline                                              pipeline;
+		HPPTexture                                                texture;
+
+		void destroy(vk::Device device)
+		{
+			mesh.reset();
+			device.destroyPipeline(pipeline);
+			device.destroySampler(texture.sampler);
+		}
+	};
+
+	struct UBOVS
+	{
+		glm::mat4 projection;
+		glm::mat4 view;
+		glm::vec4 light_pos  = glm::vec4(0.0f, -5.0f, 0.0f, 1.0f);
+		float     loc_speed  = 0.0f;
+		float     glob_speed = 0.0f;
+	};
+
+	struct UniformBuffers
+	{
+		std::unique_ptr<vkb::core::BufferCpp> scene;
+	};
+
+  private:
+	// from vkb::Application
+	bool prepare(const vkb::ApplicationOptions &options) override;
+	bool resize(const uint32_t width, const uint32_t height) override;
+
+	// from vkb::VulkanSample
+	void request_gpu_features(vkb::core::HPPPhysicalDevice &gpu) override;
+
+	// from HPPApiVulkanSample
+	void build_command_buffers() override;
+	void on_update_ui_overlay(vkb::Drawer &drawer) override;
+	void render(float delta_time) override;
+
+	vk::DescriptorPool      create_descriptor_pool();
+	vk::DescriptorSetLayout create_descriptor_set_layout();
+	vk::Pipeline            create_planet_pipeline();
+	vk::Pipeline            create_rocks_pipeline();
+	vk::Pipeline            create_starfield_pipeline();
+	void                    draw();
+	void                    load_assets();
+	void                    initialize_camera();
+	void                    prepare_instance_data();
+	void                    prepare_uniform_buffers();
+	void                    update_uniform_buffer(float delta_time);
+	void                    update_planet_descriptor_set();
+	void                    update_rocks_descriptor_set();
+
+  private:
+	vk::DescriptorSetLayout descriptor_set_layout;
+	InstanceBuffer          instance_buffer;
+	Model                   planet;
+	Model                   rocks;
+	vk::PipelineLayout      pipeline_layout;
+	vk::Pipeline            starfield_pipeline;
+	UBOVS                   ubo_vs;
+	UniformBuffers          uniform_buffers;
+};
+
+std::unique_ptr<vkb::Application> create_hpp_instancing();