137 lines
3.3 KiB
C++
137 lines
3.3 KiB
C++
/* 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();
|