init

2025-09-04 10:54:47 +08:00
commit 6bc8f61b18
1808 changed files with 208268 additions and 0 deletions
@@ -0,0 +1,136 @@
+/* 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.
+ */
+
+/*
+ * Dynamic terrain tessellation
+ */
+
+#pragma once
+
+#include "api_vulkan_sample.h"
+#include "core/buffer.h"
+#include "geometry/frustum.h"
+
+class TerrainTessellation : public ApiVulkanSample
+{
+  public:
+	bool wireframe    = false;
+	bool tessellation = true;
+
+	struct
+	{
+		Texture heightmap;
+		Texture skysphere;
+		Texture terrain_array;
+	} textures;
+
+	std::unique_ptr<vkb::sg::SubMesh> skysphere;
+
+	struct Vertex
+	{
+		glm::vec3 pos;
+		glm::vec3 normal;
+		glm::vec2 uv;
+	};
+
+	struct Terrain
+	{
+		std::unique_ptr<vkb::core::BufferC> vertices;
+		std::unique_ptr<vkb::core::BufferC> indices;
+		uint32_t                            index_count;
+	} terrain;
+
+	struct
+	{
+		std::unique_ptr<vkb::core::BufferC> terrain_tessellation;
+		std::unique_ptr<vkb::core::BufferC> skysphere_vertex;
+	} uniform_buffers;
+
+	// Shared values for tessellation control and evaluation stages
+	struct
+	{
+		glm::mat4 projection;
+		glm::mat4 modelview;
+		glm::vec4 light_pos = glm::vec4(-48.0f, -40.0f, 46.0f, 0.0f);
+		glm::vec4 frustum_planes[6];
+		float     displacement_factor = 32.0f;
+		float     tessellation_factor = 0.75f;
+		glm::vec2 viewport_dim;
+		// Desired size of tessellated quad patch edge
+		float tessellated_edge_size = 20.0f;
+	} ubo_tess;
+
+	// Skysphere vertex shader stage
+	struct
+	{
+		glm::mat4 mvp;
+	} ubo_vs;
+
+	struct Pipelines
+	{
+		VkPipeline terrain;
+		VkPipeline wireframe = VK_NULL_HANDLE;
+		VkPipeline skysphere;
+	} pipelines;
+
+	struct
+	{
+		VkDescriptorSetLayout terrain;
+		VkDescriptorSetLayout skysphere;
+	} descriptor_set_layouts;
+
+	struct
+	{
+		VkPipelineLayout terrain;
+		VkPipelineLayout skysphere;
+	} pipeline_layouts;
+
+	struct
+	{
+		VkDescriptorSet terrain;
+		VkDescriptorSet skysphere;
+	} descriptor_sets;
+
+	// Pipeline statistics
+	VkQueryPool query_pool        = VK_NULL_HANDLE;
+	uint64_t    pipeline_stats[2] = {0};
+
+	// View frustum passed to tessellation control shader for culling
+	vkb::Frustum frustum;
+
+	TerrainTessellation();
+	~TerrainTessellation();
+	virtual void request_gpu_features(vkb::PhysicalDevice &gpu) override;
+	void         setup_query_result_buffer();
+	void         get_query_results();
+	void         load_assets();
+	void         build_command_buffers() override;
+	void         generate_terrain();
+	void         setup_descriptor_pool();
+	void         setup_descriptor_set_layouts();
+	void         setup_descriptor_sets();
+	void         prepare_pipelines();
+	void         prepare_uniform_buffers();
+	void         update_uniform_buffers();
+	void         draw();
+	bool         prepare(const vkb::ApplicationOptions &options) override;
+	virtual void render(float delta_time) override;
+	virtual void view_changed() override;
+	virtual void on_update_ui_overlay(vkb::Drawer &drawer) override;
+};
+
+std::unique_ptr<vkb::Application> create_terrain_tessellation();