559 lines
No EOL
18 KiB
C++
559 lines
No EOL
18 KiB
C++
/*
|
|
* Vulkan Example - Displacement mapping with tessellation shaders
|
|
*
|
|
* Copyright (C) 2016 by Sascha Willems - www.saschawillems.de
|
|
*
|
|
* This code is licensed under the MIT license (MIT) (http://opensource.org/licenses/MIT)
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <assert.h>
|
|
#include <vector>
|
|
|
|
#define GLM_FORCE_RADIANS
|
|
#define GLM_FORCE_DEPTH_ZERO_TO_ONE
|
|
#include <glm/glm.hpp>
|
|
#include <glm/gtc/matrix_transform.hpp>
|
|
#include <gli/gli.hpp>
|
|
|
|
#include <vulkan/vulkan.h>
|
|
#include "vulkanexamplebase.h"
|
|
#include "VulkanTexture.hpp"
|
|
#include "VulkanModel.hpp"
|
|
#include "VulkanBuffer.hpp"
|
|
|
|
#define VERTEX_BUFFER_BIND_ID 0
|
|
#define ENABLE_VALIDATION false
|
|
|
|
class VulkanExample : public VulkanExampleBase
|
|
{
|
|
private:
|
|
struct {
|
|
vks::Texture2D colorHeightMap;
|
|
} textures;
|
|
public:
|
|
bool splitScreen = true;
|
|
bool displacement = true;
|
|
|
|
struct {
|
|
VkPipelineVertexInputStateCreateInfo inputState;
|
|
std::vector<VkVertexInputBindingDescription> bindingDescriptions;
|
|
std::vector<VkVertexInputAttributeDescription> attributeDescriptions;
|
|
} vertices;
|
|
|
|
// Vertex layout for the models
|
|
vks::VertexLayout vertexLayout = vks::VertexLayout({
|
|
vks::VERTEX_COMPONENT_POSITION,
|
|
vks::VERTEX_COMPONENT_NORMAL,
|
|
vks::VERTEX_COMPONENT_UV,
|
|
});
|
|
|
|
struct {
|
|
vks::Model object;
|
|
} models;
|
|
|
|
struct {
|
|
vks::Buffer tessControl, tessEval;
|
|
} uniformBuffers;
|
|
|
|
struct UBOTessControl {
|
|
float tessLevel = 64.0f;
|
|
} uboTessControl;
|
|
|
|
struct UBOTessEval {
|
|
glm::mat4 projection;
|
|
glm::mat4 model;
|
|
glm::vec4 lightPos = glm::vec4(0.0f, -1.0f, 0.0f, 0.0f);
|
|
float tessAlpha = 1.0f;
|
|
float tessStrength = 0.1f;
|
|
} uboTessEval;
|
|
|
|
struct Pipelines {
|
|
VkPipeline solid;
|
|
VkPipeline wireframe = VK_NULL_HANDLE;
|
|
} pipelines;
|
|
|
|
VkPipelineLayout pipelineLayout;
|
|
VkDescriptorSet descriptorSet;
|
|
VkDescriptorSetLayout descriptorSetLayout;
|
|
|
|
VulkanExample() : VulkanExampleBase(ENABLE_VALIDATION)
|
|
{
|
|
zoom = -1.25f;
|
|
rotation = glm::vec3(-20.0f, 45.0f, 0.0f);
|
|
title = "Tessellation shader displacement";
|
|
settings.overlay = true;
|
|
}
|
|
|
|
~VulkanExample()
|
|
{
|
|
// Clean up used Vulkan resources
|
|
// Note : Inherited destructor cleans up resources stored in base class
|
|
vkDestroyPipeline(device, pipelines.solid, nullptr);
|
|
if (pipelines.wireframe != VK_NULL_HANDLE) {
|
|
vkDestroyPipeline(device, pipelines.wireframe, nullptr);
|
|
};
|
|
|
|
vkDestroyPipelineLayout(device, pipelineLayout, nullptr);
|
|
vkDestroyDescriptorSetLayout(device, descriptorSetLayout, nullptr);
|
|
|
|
uniformBuffers.tessControl.destroy();
|
|
uniformBuffers.tessEval.destroy();
|
|
models.object.destroy();
|
|
textures.colorHeightMap.destroy();
|
|
}
|
|
|
|
// Enable physical device features required for this example
|
|
virtual void getEnabledFeatures()
|
|
{
|
|
// Tessellation shader support is required for this example
|
|
if (deviceFeatures.tessellationShader) {
|
|
enabledFeatures.tessellationShader = VK_TRUE;
|
|
}
|
|
else {
|
|
vks::tools::exitFatal("Selected GPU does not support tessellation shaders!", "Feature not supported");
|
|
}
|
|
// Fill mode non solid is required for wireframe display
|
|
if (deviceFeatures.fillModeNonSolid) {
|
|
enabledFeatures.fillModeNonSolid = VK_TRUE;
|
|
}
|
|
else {
|
|
splitScreen = false;
|
|
}
|
|
}
|
|
|
|
void loadAssets()
|
|
{
|
|
models.object.loadFromFile(getAssetPath() + "models/plane.obj", vertexLayout, 0.25f, vulkanDevice, queue);
|
|
// Textures
|
|
if (vulkanDevice->features.textureCompressionBC) {
|
|
textures.colorHeightMap.loadFromFile(getAssetPath() + "textures/stonefloor03_color_bc3_unorm.ktx", VK_FORMAT_BC3_UNORM_BLOCK, vulkanDevice, queue);
|
|
}
|
|
else if (vulkanDevice->features.textureCompressionASTC_LDR) {
|
|
textures.colorHeightMap.loadFromFile(getAssetPath() + "textures/stonefloor03_color_astc_8x8_unorm.ktx", VK_FORMAT_ASTC_8x8_UNORM_BLOCK, vulkanDevice, queue);
|
|
}
|
|
else if (vulkanDevice->features.textureCompressionETC2) {
|
|
textures.colorHeightMap.loadFromFile(getAssetPath() + "textures/stonefloor03_color_etc2_unorm.ktx", VK_FORMAT_ETC2_R8G8B8_UNORM_BLOCK, vulkanDevice, queue);
|
|
}
|
|
else {
|
|
vks::tools::exitFatal("Device does not support any compressed texture format!", "Error");
|
|
}
|
|
}
|
|
|
|
void buildCommandBuffers()
|
|
{
|
|
VkCommandBufferBeginInfo cmdBufInfo = vks::initializers::commandBufferBeginInfo();
|
|
|
|
VkClearValue clearValues[2];
|
|
clearValues[0].color = defaultClearColor;
|
|
clearValues[1].depthStencil = { 1.0f, 0 };
|
|
|
|
VkRenderPassBeginInfo renderPassBeginInfo = vks::initializers::renderPassBeginInfo();
|
|
renderPassBeginInfo.renderPass = renderPass;
|
|
renderPassBeginInfo.renderArea.offset.x = 0;
|
|
renderPassBeginInfo.renderArea.offset.y = 0;
|
|
renderPassBeginInfo.renderArea.extent.width = width;
|
|
renderPassBeginInfo.renderArea.extent.height = height;
|
|
renderPassBeginInfo.clearValueCount = 2;
|
|
renderPassBeginInfo.pClearValues = clearValues;
|
|
|
|
for (int32_t i = 0; i < drawCmdBuffers.size(); ++i)
|
|
{
|
|
// Set target frame buffer
|
|
renderPassBeginInfo.framebuffer = frameBuffers[i];
|
|
|
|
VK_CHECK_RESULT(vkBeginCommandBuffer(drawCmdBuffers[i], &cmdBufInfo));
|
|
|
|
vkCmdBeginRenderPass(drawCmdBuffers[i], &renderPassBeginInfo, VK_SUBPASS_CONTENTS_INLINE);
|
|
|
|
VkViewport viewport = vks::initializers::viewport((float)width, (float)height, 0.0f, 1.0f);
|
|
vkCmdSetViewport(drawCmdBuffers[i], 0, 1, &viewport);
|
|
|
|
VkRect2D scissor = vks::initializers::rect2D(splitScreen ? width / 2 : width, height, 0, 0);
|
|
vkCmdSetScissor(drawCmdBuffers[i], 0, 1, &scissor);
|
|
|
|
vkCmdSetLineWidth(drawCmdBuffers[i], 1.0f);
|
|
|
|
vkCmdBindDescriptorSets(drawCmdBuffers[i], VK_PIPELINE_BIND_POINT_GRAPHICS, pipelineLayout, 0, 1, &descriptorSet, 0, NULL);
|
|
|
|
VkDeviceSize offsets[1] = { 0 };
|
|
vkCmdBindVertexBuffers(drawCmdBuffers[i], VERTEX_BUFFER_BIND_ID, 1, &models.object.vertices.buffer, offsets);
|
|
vkCmdBindIndexBuffer(drawCmdBuffers[i], models.object.indices.buffer, 0, VK_INDEX_TYPE_UINT32);
|
|
|
|
if (splitScreen)
|
|
{
|
|
vkCmdBindPipeline(drawCmdBuffers[i], VK_PIPELINE_BIND_POINT_GRAPHICS, pipelines.wireframe);
|
|
vkCmdDrawIndexed(drawCmdBuffers[i], models.object.indexCount, 1, 0, 0, 0);
|
|
scissor.offset.x = width / 2;
|
|
vkCmdSetScissor(drawCmdBuffers[i], 0, 1, &scissor);
|
|
}
|
|
|
|
vkCmdBindPipeline(drawCmdBuffers[i], VK_PIPELINE_BIND_POINT_GRAPHICS, pipelines.solid);
|
|
vkCmdDrawIndexed(drawCmdBuffers[i], models.object.indexCount, 1, 0, 0, 0);
|
|
|
|
vkCmdEndRenderPass(drawCmdBuffers[i]);
|
|
|
|
VK_CHECK_RESULT(vkEndCommandBuffer(drawCmdBuffers[i]));
|
|
}
|
|
}
|
|
|
|
void setupVertexDescriptions()
|
|
{
|
|
// Binding description
|
|
vertices.bindingDescriptions.resize(1);
|
|
vertices.bindingDescriptions[0] =
|
|
vks::initializers::vertexInputBindingDescription(
|
|
VERTEX_BUFFER_BIND_ID,
|
|
vertexLayout.stride(),
|
|
VK_VERTEX_INPUT_RATE_VERTEX);
|
|
|
|
// Attribute descriptions
|
|
// Describes memory layout and shader positions
|
|
vertices.attributeDescriptions.resize(3);
|
|
|
|
// Location 0 : Position
|
|
vertices.attributeDescriptions[0] =
|
|
vks::initializers::vertexInputAttributeDescription(
|
|
VERTEX_BUFFER_BIND_ID,
|
|
0,
|
|
VK_FORMAT_R32G32B32_SFLOAT,
|
|
0);
|
|
|
|
// Location 1 : Normals
|
|
vertices.attributeDescriptions[1] =
|
|
vks::initializers::vertexInputAttributeDescription(
|
|
VERTEX_BUFFER_BIND_ID,
|
|
1,
|
|
VK_FORMAT_R32G32B32_SFLOAT,
|
|
sizeof(float) * 3);
|
|
|
|
// Location 2 : Texture coordinates
|
|
vertices.attributeDescriptions[2] =
|
|
vks::initializers::vertexInputAttributeDescription(
|
|
VERTEX_BUFFER_BIND_ID,
|
|
2,
|
|
VK_FORMAT_R32G32_SFLOAT,
|
|
sizeof(float) * 6);
|
|
|
|
vertices.inputState = vks::initializers::pipelineVertexInputStateCreateInfo();
|
|
vertices.inputState.vertexBindingDescriptionCount = static_cast<uint32_t>(vertices.bindingDescriptions.size());
|
|
vertices.inputState.pVertexBindingDescriptions = vertices.bindingDescriptions.data();
|
|
vertices.inputState.vertexAttributeDescriptionCount = static_cast<uint32_t>(vertices.attributeDescriptions.size());
|
|
vertices.inputState.pVertexAttributeDescriptions = vertices.attributeDescriptions.data();
|
|
}
|
|
|
|
void setupDescriptorPool()
|
|
{
|
|
// Example uses two ubos and two image samplers
|
|
std::vector<VkDescriptorPoolSize> poolSizes =
|
|
{
|
|
vks::initializers::descriptorPoolSize(VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER, 2),
|
|
vks::initializers::descriptorPoolSize(VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, 1)
|
|
};
|
|
|
|
VkDescriptorPoolCreateInfo descriptorPoolInfo =
|
|
vks::initializers::descriptorPoolCreateInfo(
|
|
static_cast<uint32_t>(poolSizes.size()),
|
|
poolSizes.data(),
|
|
2);
|
|
|
|
VK_CHECK_RESULT(vkCreateDescriptorPool(device, &descriptorPoolInfo, nullptr, &descriptorPool));
|
|
}
|
|
|
|
void setupDescriptorSetLayout()
|
|
{
|
|
std::vector<VkDescriptorSetLayoutBinding> setLayoutBindings =
|
|
{
|
|
// Binding 0 : Tessellation control shader ubo
|
|
vks::initializers::descriptorSetLayoutBinding(
|
|
VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER,
|
|
VK_SHADER_STAGE_TESSELLATION_CONTROL_BIT,
|
|
0),
|
|
// Binding 1 : Tessellation evaluation shader ubo
|
|
vks::initializers::descriptorSetLayoutBinding(
|
|
VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER,
|
|
VK_SHADER_STAGE_TESSELLATION_EVALUATION_BIT,
|
|
1),
|
|
// Binding 2 : Combined color (rgb) and height (alpha) map
|
|
vks::initializers::descriptorSetLayoutBinding(
|
|
VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER,
|
|
VK_SHADER_STAGE_TESSELLATION_EVALUATION_BIT | VK_SHADER_STAGE_FRAGMENT_BIT,
|
|
2),
|
|
};
|
|
|
|
VkDescriptorSetLayoutCreateInfo descriptorLayout =
|
|
vks::initializers::descriptorSetLayoutCreateInfo(
|
|
setLayoutBindings.data(),
|
|
static_cast<uint32_t>(setLayoutBindings.size()));
|
|
|
|
VK_CHECK_RESULT(vkCreateDescriptorSetLayout(device, &descriptorLayout, nullptr, &descriptorSetLayout));
|
|
|
|
VkPipelineLayoutCreateInfo pPipelineLayoutCreateInfo =
|
|
vks::initializers::pipelineLayoutCreateInfo(
|
|
&descriptorSetLayout,
|
|
1);
|
|
|
|
VK_CHECK_RESULT(vkCreatePipelineLayout(device, &pPipelineLayoutCreateInfo, nullptr, &pipelineLayout));
|
|
}
|
|
|
|
void setupDescriptorSet()
|
|
{
|
|
VkDescriptorSetAllocateInfo allocInfo =
|
|
vks::initializers::descriptorSetAllocateInfo(
|
|
descriptorPool,
|
|
&descriptorSetLayout,
|
|
1);
|
|
|
|
VK_CHECK_RESULT(vkAllocateDescriptorSets(device, &allocInfo, &descriptorSet));
|
|
|
|
// Color and height map image descriptor
|
|
VkDescriptorImageInfo texDescriptor =
|
|
vks::initializers::descriptorImageInfo(
|
|
textures.colorHeightMap.sampler,
|
|
textures.colorHeightMap.view,
|
|
VK_IMAGE_LAYOUT_GENERAL);
|
|
|
|
std::vector<VkWriteDescriptorSet> writeDescriptorSets =
|
|
{
|
|
// Binding 0 : Tessellation control shader ubo
|
|
vks::initializers::writeDescriptorSet(
|
|
descriptorSet,
|
|
VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER,
|
|
0,
|
|
&uniformBuffers.tessControl.descriptor),
|
|
// Binding 1 : Tessellation evaluation shader ubo
|
|
vks::initializers::writeDescriptorSet(
|
|
descriptorSet,
|
|
VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER,
|
|
1,
|
|
&uniformBuffers.tessEval.descriptor),
|
|
// Binding 2 : Color and displacement map (alpha channel)
|
|
vks::initializers::writeDescriptorSet(
|
|
descriptorSet,
|
|
VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER,
|
|
2,
|
|
&texDescriptor),
|
|
};
|
|
|
|
vkUpdateDescriptorSets(device, static_cast<uint32_t>(writeDescriptorSets.size()), writeDescriptorSets.data(), 0, NULL);
|
|
}
|
|
|
|
void preparePipelines()
|
|
{
|
|
VkPipelineInputAssemblyStateCreateInfo inputAssemblyState =
|
|
vks::initializers::pipelineInputAssemblyStateCreateInfo(
|
|
VK_PRIMITIVE_TOPOLOGY_PATCH_LIST,
|
|
0,
|
|
VK_FALSE);
|
|
|
|
VkPipelineRasterizationStateCreateInfo rasterizationState =
|
|
vks::initializers::pipelineRasterizationStateCreateInfo(
|
|
VK_POLYGON_MODE_FILL,
|
|
VK_CULL_MODE_NONE,
|
|
VK_FRONT_FACE_COUNTER_CLOCKWISE,
|
|
0);
|
|
|
|
VkPipelineColorBlendAttachmentState blendAttachmentState =
|
|
vks::initializers::pipelineColorBlendAttachmentState(
|
|
0xf,
|
|
VK_FALSE);
|
|
|
|
VkPipelineColorBlendStateCreateInfo colorBlendState =
|
|
vks::initializers::pipelineColorBlendStateCreateInfo(
|
|
1,
|
|
&blendAttachmentState);
|
|
|
|
VkPipelineDepthStencilStateCreateInfo depthStencilState =
|
|
vks::initializers::pipelineDepthStencilStateCreateInfo(
|
|
VK_TRUE,
|
|
VK_TRUE,
|
|
VK_COMPARE_OP_LESS_OR_EQUAL);
|
|
|
|
VkPipelineViewportStateCreateInfo viewportState =
|
|
vks::initializers::pipelineViewportStateCreateInfo(1, 1, 0);
|
|
|
|
VkPipelineMultisampleStateCreateInfo multisampleState =
|
|
vks::initializers::pipelineMultisampleStateCreateInfo(
|
|
VK_SAMPLE_COUNT_1_BIT,
|
|
0);
|
|
|
|
std::vector<VkDynamicState> dynamicStateEnables = {
|
|
VK_DYNAMIC_STATE_VIEWPORT,
|
|
VK_DYNAMIC_STATE_SCISSOR,
|
|
VK_DYNAMIC_STATE_LINE_WIDTH
|
|
};
|
|
VkPipelineDynamicStateCreateInfo dynamicState =
|
|
vks::initializers::pipelineDynamicStateCreateInfo(
|
|
dynamicStateEnables.data(),
|
|
static_cast<uint32_t>(dynamicStateEnables.size()),
|
|
0);
|
|
|
|
VkPipelineTessellationStateCreateInfo tessellationState =
|
|
vks::initializers::pipelineTessellationStateCreateInfo(3);
|
|
|
|
// Tessellation pipeline
|
|
// Load shaders
|
|
std::array<VkPipelineShaderStageCreateInfo, 4> shaderStages;
|
|
shaderStages[0] = loadShader(getAssetPath() + "shaders/displacement/base.vert.spv", VK_SHADER_STAGE_VERTEX_BIT);
|
|
shaderStages[1] = loadShader(getAssetPath() + "shaders/displacement/base.frag.spv", VK_SHADER_STAGE_FRAGMENT_BIT);
|
|
shaderStages[2] = loadShader(getAssetPath() + "shaders/displacement/displacement.tesc.spv", VK_SHADER_STAGE_TESSELLATION_CONTROL_BIT);
|
|
shaderStages[3] = loadShader(getAssetPath() + "shaders/displacement/displacement.tese.spv", VK_SHADER_STAGE_TESSELLATION_EVALUATION_BIT);
|
|
|
|
VkGraphicsPipelineCreateInfo pipelineCreateInfo =
|
|
vks::initializers::pipelineCreateInfo(
|
|
pipelineLayout,
|
|
renderPass,
|
|
0);
|
|
|
|
pipelineCreateInfo.pVertexInputState = &vertices.inputState;
|
|
pipelineCreateInfo.pInputAssemblyState = &inputAssemblyState;
|
|
pipelineCreateInfo.pRasterizationState = &rasterizationState;
|
|
pipelineCreateInfo.pColorBlendState = &colorBlendState;
|
|
pipelineCreateInfo.pMultisampleState = &multisampleState;
|
|
pipelineCreateInfo.pViewportState = &viewportState;
|
|
pipelineCreateInfo.pDepthStencilState = &depthStencilState;
|
|
pipelineCreateInfo.pDynamicState = &dynamicState;
|
|
pipelineCreateInfo.pTessellationState = &tessellationState;
|
|
pipelineCreateInfo.stageCount = static_cast<uint32_t>(shaderStages.size());
|
|
pipelineCreateInfo.pStages = shaderStages.data();
|
|
pipelineCreateInfo.renderPass = renderPass;
|
|
|
|
// Solid pipeline
|
|
rasterizationState.cullMode = VK_CULL_MODE_BACK_BIT;
|
|
VK_CHECK_RESULT(vkCreateGraphicsPipelines(device, pipelineCache, 1, &pipelineCreateInfo, nullptr, &pipelines.solid));
|
|
if (deviceFeatures.fillModeNonSolid) {
|
|
// Wireframe pipeline
|
|
rasterizationState.polygonMode = VK_POLYGON_MODE_LINE;
|
|
rasterizationState.cullMode = VK_CULL_MODE_NONE;
|
|
VK_CHECK_RESULT(vkCreateGraphicsPipelines(device, pipelineCache, 1, &pipelineCreateInfo, nullptr, &pipelines.wireframe));
|
|
}
|
|
}
|
|
|
|
// Prepare and initialize uniform buffer containing shader uniforms
|
|
void prepareUniformBuffers()
|
|
{
|
|
// Tessellation evaluation shader uniform buffer
|
|
VK_CHECK_RESULT(vulkanDevice->createBuffer(
|
|
VK_BUFFER_USAGE_UNIFORM_BUFFER_BIT,
|
|
VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT | VK_MEMORY_PROPERTY_HOST_COHERENT_BIT,
|
|
&uniformBuffers.tessEval,
|
|
sizeof(uboTessEval)));
|
|
|
|
// Tessellation control shader uniform buffer
|
|
VK_CHECK_RESULT(vulkanDevice->createBuffer(
|
|
VK_BUFFER_USAGE_UNIFORM_BUFFER_BIT,
|
|
VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT | VK_MEMORY_PROPERTY_HOST_COHERENT_BIT,
|
|
&uniformBuffers.tessControl,
|
|
sizeof(uboTessControl)));
|
|
|
|
// Map persistent
|
|
VK_CHECK_RESULT(uniformBuffers.tessControl.map());
|
|
VK_CHECK_RESULT(uniformBuffers.tessEval.map());
|
|
|
|
updateUniformBuffers();
|
|
}
|
|
|
|
void updateUniformBuffers()
|
|
{
|
|
// Tessellation eval
|
|
glm::mat4 viewMatrix = glm::mat4(1.0f);
|
|
uboTessEval.projection = glm::perspective(glm::radians(45.0f), (float)(width) / (float)height, 0.1f, 256.0f);
|
|
viewMatrix = glm::translate(viewMatrix, glm::vec3(0.0f, 0.0f, zoom));
|
|
|
|
uboTessEval.model = glm::mat4(1.0f);
|
|
uboTessEval.model = viewMatrix * glm::translate(uboTessEval.model, glm::vec3(0, 0, 0));
|
|
uboTessEval.model = glm::rotate(uboTessEval.model, glm::radians(rotation.x), glm::vec3(1.0f, 0.0f, 0.0f));
|
|
uboTessEval.model = glm::rotate(uboTessEval.model, glm::radians(rotation.y), glm::vec3(0.0f, 1.0f, 0.0f));
|
|
uboTessEval.model = glm::rotate(uboTessEval.model, glm::radians(rotation.z), glm::vec3(0.0f, 0.0f, 1.0f));
|
|
|
|
uboTessEval.lightPos.y = -0.5f - uboTessEval.tessStrength;
|
|
|
|
memcpy(uniformBuffers.tessEval.mapped, &uboTessEval, sizeof(uboTessEval));
|
|
|
|
// Tessellation control
|
|
float savedLevel = uboTessControl.tessLevel;
|
|
if (!displacement)
|
|
{
|
|
uboTessControl.tessLevel = 1.0f;
|
|
}
|
|
|
|
memcpy(uniformBuffers.tessControl.mapped, &uboTessControl, sizeof(uboTessControl));
|
|
|
|
if (!displacement)
|
|
{
|
|
uboTessControl.tessLevel = savedLevel;
|
|
}
|
|
}
|
|
|
|
void draw()
|
|
{
|
|
VulkanExampleBase::prepareFrame();
|
|
|
|
// Command buffer to be sumitted to the queue
|
|
submitInfo.commandBufferCount = 1;
|
|
submitInfo.pCommandBuffers = &drawCmdBuffers[currentBuffer];
|
|
|
|
// Submit to queue
|
|
VK_CHECK_RESULT(vkQueueSubmit(queue, 1, &submitInfo, VK_NULL_HANDLE));
|
|
|
|
VulkanExampleBase::submitFrame();
|
|
}
|
|
|
|
void prepare()
|
|
{
|
|
// Check if device supports tessellation shaders
|
|
if (!deviceFeatures.tessellationShader)
|
|
{
|
|
vks::tools::exitFatal("Selected GPU does not support tessellation shaders!", "Feature not supported");
|
|
}
|
|
|
|
VulkanExampleBase::prepare();
|
|
loadAssets();
|
|
setupVertexDescriptions();
|
|
prepareUniformBuffers();
|
|
setupDescriptorSetLayout();
|
|
preparePipelines();
|
|
setupDescriptorPool();
|
|
setupDescriptorSet();
|
|
buildCommandBuffers();
|
|
prepared = true;
|
|
}
|
|
|
|
virtual void render()
|
|
{
|
|
if (!prepared)
|
|
return;
|
|
draw();
|
|
}
|
|
|
|
virtual void viewChanged()
|
|
{
|
|
updateUniformBuffers();
|
|
}
|
|
|
|
virtual void OnUpdateUIOverlay(vks::UIOverlay *overlay)
|
|
{
|
|
if (overlay->header("Settings")) {
|
|
if (overlay->checkBox("Tessellation displacement", &displacement)) {
|
|
updateUniformBuffers();
|
|
}
|
|
if (overlay->inputFloat("Strength", &uboTessEval.tessStrength, 0.025f, 3)) {
|
|
updateUniformBuffers();
|
|
}
|
|
if (overlay->inputFloat("Level", &uboTessControl.tessLevel, 0.5f, 2)) {
|
|
updateUniformBuffers();
|
|
}
|
|
if (deviceFeatures.fillModeNonSolid) {
|
|
if (overlay->checkBox("Splitscreen", &splitScreen)) {
|
|
buildCommandBuffers();
|
|
updateUniformBuffers();
|
|
}
|
|
}
|
|
|
|
}
|
|
}
|
|
};
|
|
|
|
VULKAN_EXAMPLE_MAIN() |