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samples/api/instancing/instancing.h

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+/* Copyright (c) 2019-2024, Sascha Willems
+ *
+ * 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
+ */
+
+#pragma once
+
+#include "api_vulkan_sample.h"
+
+#if defined(__ANDROID__)
+#	define INSTANCE_COUNT 4096
+#else
+#	define INSTANCE_COUNT 8192
+#endif
+
+class Instancing : public ApiVulkanSample
+{
+  public:
+	struct Textures
+	{
+		Texture rocks;
+		Texture planet;
+	} textures;
+
+	struct Models
+	{
+		std::unique_ptr<vkb::sg::SubMesh> rock;
+		std::unique_ptr<vkb::sg::SubMesh> planet;
+	} models;
+
+	// Per-instance data block
+	struct InstanceData
+	{
+		glm::vec3 pos;
+		glm::vec3 rot;
+		float     scale;
+		uint32_t  texIndex;
+	};
+	// Contains the instanced data
+	struct InstanceBuffer
+	{
+		std::unique_ptr<vkb::core::BufferC> buffer;
+		size_t                              size = 0;
+		VkDescriptorBufferInfo              descriptor;
+	} instance_buffer;
+
+	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;
+	} ubo_vs;
+
+	struct UniformBuffers
+	{
+		std::unique_ptr<vkb::core::BufferC> scene;
+	} uniform_buffers;
+
+	VkPipelineLayout pipeline_layout;
+	struct Pipelines
+	{
+		VkPipeline instanced_rocks;
+		VkPipeline planet;
+		VkPipeline starfield;
+	} pipelines;
+
+	VkDescriptorSetLayout descriptor_set_layout;
+	struct DescriptorSets
+	{
+		VkDescriptorSet instanced_rocks;
+		VkDescriptorSet planet;
+	} descriptor_sets;
+
+	Instancing();
+	~Instancing();
+	virtual void request_gpu_features(vkb::PhysicalDevice &gpu) override;
+	void         build_command_buffers() override;
+	void         load_assets();
+	void         setup_descriptor_pool();
+	void         setup_descriptor_set_layout();
+	void         setup_descriptor_set();
+	void         prepare_pipelines();
+	void         prepare_instance_data();
+	void         prepare_uniform_buffers();
+	void         update_uniform_buffer(float delta_time);
+	void         draw();
+	bool         prepare(const vkb::ApplicationOptions &options) override;
+	virtual void render(float delta_time) override;
+	virtual void on_update_ui_overlay(vkb::Drawer &drawer) override;
+	virtual bool resize(const uint32_t width, const uint32_t height) override;
+};
+
+std::unique_ptr<vkb::Application> create_instancing();