Interaction.. Yay?

.idea/misc.xml

@@ -1,4 +1,9 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
   <component name="CMakeWorkspace" PROJECT_DIR="$PROJECT_DIR$" />
+  <component name="CidrRootsConfiguration">
+    <excludeRoots>
+      <file path="$PROJECT_DIR$/build" />
+    </excludeRoots>
+  </component>
 </project>

CMakeLists.txt

@@ -6,6 +6,5 @@ set(CMAKE_CXX_STANDARD 20)
 find_package(Vulkan REQUIRED)
 find_package(Qt5 COMPONENTS Gui REQUIRED)
 
-add_executable(VulkanCppSetup src/main.cpp src/VulkanWindow.cpp src/VulkanRenderer.cpp src/ShaderLoader.cpp)
-#include_directories(VulkanCppSetup ${Vulkan_INCLUDE_DIRS} ${Qt5_INCLUDE_DIRS})
+add_executable(VulkanCppSetup src/main.cpp src/VulkanWindow.cpp src/VulkanRenderer.cpp src/ShaderLoader.cpp src/WorldView.cpp src/UniformBuffers.cpp src/camera.cpp)
 target_link_libraries(VulkanCppSetup ${Vulkan_LIBRARIES} Qt5::Gui)

shaders/shader.vert

@@ -1,20 +1,44 @@
 #version 450
 
+layout(push_constant) uniform VertexUniformBufferObject {
+    mat4 model;
+    mat4 view;
+    mat4 proj;
+} ubo;
+
 layout(location = 0) out vec3 fragColor;
 
-vec2 positions[3] = vec2[](
-    vec2(0.0, -0.5),
-    vec2(0.5, 0.5),
-    vec2(-0.5, 0.5)
+vec3 positions[12] = vec3[](
+    vec3(0.0, -1.0, 1.0), // 1
+    vec3(1.0, 1.0, 1.0), // 2
+    vec3(-1.0, 1.0, 1.0), // 3
+    vec3(-1.0, 1.0, 1.0), // 3
+    vec3(0.0, 0.0, -1.0), // 4
+    vec3(0.0, -1.0, 1.0), // 1
+    vec3(0.0, -1.0, 1.0), // 1
+    vec3(0.0, 0.0, -1.0), // 4
+    vec3(1.0, 1.0, 1.0), // 2
+    vec3(1.0, 1.0, 1.0), // 2
+    vec3(0.0, 0.0, -1.0), // 4
+    vec3(-1.0, 1.0, 1.0) // 3
 );
 
-vec3 colors[3] = vec3[](
+vec3 colors[12] = vec3[](
     vec3(1.0, 0.0, 0.0),
     vec3(0.0, 1.0, 0.0),
+    vec3(0.0, 0.0, 1.0),
+    vec3(0.0, 0.0, 1.0),
+    vec3(1.0, 1.0, 1.0),
+    vec3(1.0, 0.0, 0.0),
+    vec3(1.0, 0.0, 0.0),
+    vec3(1.0, 1.0, 1.0),
+    vec3(0.0, 1.0, 0.0),
+    vec3(0.0, 1.0, 0.0),
+    vec3(1.0, 1.0, 1.0),
     vec3(0.0, 0.0, 1.0)
 );
 
 void main() {
-    gl_Position = vec4(positions[gl_VertexIndex], 0.0, 1.0);
+    gl_Position = ubo.proj * ubo.view * ubo.model * vec4(positions[gl_VertexIndex], 1.0);
     fragColor = colors[gl_VertexIndex];
 }

src/UniformBuffers.cpp

@@ -0,0 +1,103 @@
+#include "UniformBuffers.h"
+#include "VertexUniformBufferObject.h"
+#include <QVulkanDeviceFunctions>
+
+/// Find a memory in `memoryTypeBitsRequirement` that includes all of
+/// `requiredProperties` see
+/// https://www.khronos.org/registry/vulkan/specs/1.2-extensions/man/html/VkPhysicalDeviceMemoryProperties.html
+int32_t
+findProperties(const VkPhysicalDeviceMemoryProperties *pMemoryProperties,
+               uint32_t memoryTypeBitsRequirement,
+               VkMemoryPropertyFlags requiredProperties) {
+  const uint32_t memoryCount = pMemoryProperties->memoryTypeCount;
+  for (uint32_t memoryIndex = 0; memoryIndex < memoryCount; ++memoryIndex) {
+    const uint32_t memoryTypeBits = (1 << memoryIndex);
+    const bool isRequiredMemoryType =
+        memoryTypeBitsRequirement & memoryTypeBits;
+
+    const VkMemoryPropertyFlags properties =
+        pMemoryProperties->memoryTypes[memoryIndex].propertyFlags;
+    const bool hasRequiredProperties =
+        (properties & requiredProperties) == requiredProperties;
+
+    if (isRequiredMemoryType && hasRequiredProperties)
+      return static_cast<int32_t>(memoryIndex);
+  }
+
+  // failed to find memory type
+  return -1;
+}
+
+void UniformBuffers::createBuffers(QVulkanWindow *window,
+                                   QVulkanDeviceFunctions *devFuncs) {
+  VkResult result;
+
+  VkDeviceSize bufferSize = sizeof(VertexUniformBufferObject);
+
+  int swapChainImageCount = window->swapChainImageCount();
+  if (!m_uniformBuffers.empty() || !m_uniformBuffersMemory.empty()) {
+    qFatal("Uniform buffers are allocated! Old buffers need to be destroyed.");
+  }
+  m_uniformBuffers.resize(swapChainImageCount);
+  m_uniformBuffersMemory.resize(swapChainImageCount);
+
+  VkBufferCreateInfo bufferCreateInfo{};
+  bufferCreateInfo.sType = VK_STRUCTURE_TYPE_BUFFER_CREATE_INFO;
+  bufferCreateInfo.size = bufferSize;
+  bufferCreateInfo.usage = VK_BUFFER_USAGE_UNIFORM_BUFFER_BIT;
+  bufferCreateInfo.sharingMode = VK_SHARING_MODE_EXCLUSIVE;
+
+  QVulkanFunctions *pFunctions = window->vulkanInstance()->functions();
+  VkPhysicalDeviceMemoryProperties memProperties;
+  pFunctions->vkGetPhysicalDeviceMemoryProperties(window->physicalDevice(),
+                                                  &memProperties);
+
+  for (size_t i = 0; i < swapChainImageCount; i++) {
+    result = devFuncs->vkCreateBuffer(window->device(), &bufferCreateInfo,
+                                      VK_NULL_HANDLE, &m_uniformBuffers[i]);
+    if (result != VK_SUCCESS) {
+      qFatal("Failed to create buffer, code %d", result);
+    }
+
+    VkMemoryRequirements memRequirements;
+    devFuncs->vkGetBufferMemoryRequirements(
+        window->device(), m_uniformBuffers[i], &memRequirements);
+
+    VkMemoryAllocateInfo allocInfo{};
+    allocInfo.sType = VK_STRUCTURE_TYPE_MEMORY_ALLOCATE_INFO;
+    allocInfo.allocationSize = memRequirements.size;
+    uint32_t requiredProperties{VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT |
+                                VK_MEMORY_PROPERTY_HOST_COHERENT_BIT};
+    allocInfo.memoryTypeIndex = findProperties(
+        &memProperties, memRequirements.memoryTypeBits, requiredProperties);
+
+    if (allocInfo.memoryTypeIndex == -1) {
+      qFatal("Unable to find memory type with props %d", requiredProperties);
+    }
+
+    result =
+        devFuncs->vkAllocateMemory(window->device(), &allocInfo, VK_NULL_HANDLE,
+                                   &m_uniformBuffersMemory[i]);
+    if (result != VK_SUCCESS) {
+      qFatal("Failed to allocate buffer memory, code %d", result);
+    }
+
+    result = devFuncs->vkBindBufferMemory(window->device(), m_uniformBuffers[i],
+                                          m_uniformBuffersMemory[i], 0);
+    if (result != VK_SUCCESS) {
+      qFatal("Failed to bind buffer memory, code %d", result);
+    }
+  }
+}
+
+void UniformBuffers::destroyBuffers(QVulkanWindow *window,
+                                    QVulkanDeviceFunctions *devFuncs) {
+  for (VkBuffer &buffer : m_uniformBuffers) {
+    devFuncs->vkDestroyBuffer(window->device(), buffer, VK_NULL_HANDLE);
+  }
+  m_uniformBuffers.clear();
+  for (VkDeviceMemory &memory : m_uniformBuffersMemory) {
+    devFuncs->vkFreeMemory(window->device(), memory, VK_NULL_HANDLE);
+  }
+  m_uniformBuffersMemory.clear();
+}

src/UniformBuffers.h

@@ -0,0 +1,23 @@
+#ifndef VULKANCPPSETUP_UNIFORMBUFFERS_H
+#define VULKANCPPSETUP_UNIFORMBUFFERS_H
+
+#include <QVulkanDeviceFunctions>
+#include <QVulkanWindow>
+#include <vector>
+
+// Note: Switched to push constants, but kept this work
+class UniformBuffers {
+public:
+  explicit UniformBuffers() = default;
+  ~UniformBuffers() = default;
+
+  void createBuffers(QVulkanWindow *window, QVulkanDeviceFunctions *devFuncs);
+  void destroyBuffers(QVulkanWindow *window,
+                      QVulkanDeviceFunctions *devFuncs);
+
+private:
+  std::vector<VkBuffer> m_uniformBuffers{};
+  std::vector<VkDeviceMemory> m_uniformBuffersMemory{};
+};
+
+#endif // VULKANCPPSETUP_UNIFORMBUFFERS_H

src/VertexUniformBufferObject.h

@@ -0,0 +1,12 @@
+#ifndef VULKANCPPSETUP_VERTEXUNIFORMBUFFEROBJECT_H
+#define VULKANCPPSETUP_VERTEXUNIFORMBUFFEROBJECT_H
+
+#include <array>
+
+struct VertexUniformBufferObject {
+  std::array<float, 16> model;
+  std::array<float, 16> view;
+  std::array<float, 16> proj;
+};
+
+#endif // VULKANCPPSETUP_VERTEXUNIFORMBUFFEROBJECT_H

src/VulkanRenderer.cpp

@@ -1,32 +1,38 @@
 #include "VulkanRenderer.h"
+#include "VertexUniformBufferObject.h"
 #include <complex>
 
-VulkanRenderer::VulkanRenderer(QVulkanWindow *w) : m_window(w) {}
+VulkanRenderer::VulkanRenderer(QVulkanWindow *window, WorldView *worldView)
+    : m_window(window), m_worldView(worldView) {}
 
-void VulkanRenderer::initResources() {
+void VulkanRenderer::createPipeline() {
   VkResult result;
-  m_devFuncs = m_window->vulkanInstance()->deviceFunctions(m_window->device());
 
-  VkPipelineLayoutCreateInfo pipelineLayoutInfo{};
-  pipelineLayoutInfo.sType = VK_STRUCTURE_TYPE_PIPELINE_LAYOUT_CREATE_INFO;
-  pipelineLayoutInfo.setLayoutCount = 0;            // Optional
-  pipelineLayoutInfo.pSetLayouts = nullptr;         // Optional
-  pipelineLayoutInfo.pushConstantRangeCount = 0;    // Optional
-  pipelineLayoutInfo.pPushConstantRanges = nullptr; // Optional
+  // Note: switched to push constants instead
+  //  VkDescriptorSetLayoutBinding uboLayoutBinding{};
+  //  uboLayoutBinding.binding = 0;
+  //  uboLayoutBinding.descriptorType = VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER;
+  //  uboLayoutBinding.descriptorCount = 1;
+  //  uboLayoutBinding.stageFlags = VK_SHADER_STAGE_VERTEX_BIT;
+  //
+  //  VkDescriptorSetLayoutCreateInfo layoutInfo{};
+  //  layoutInfo.sType = VK_STRUCTURE_TYPE_DESCRIPTOR_SET_LAYOUT_CREATE_INFO;
+  //  layoutInfo.bindingCount = 1;
+  //  layoutInfo.pBindings = &uboLayoutBinding;
+  //
+  //  result = m_devFuncs->vkCreateDescriptorSetLayout(
+  //      m_window->device(), &layoutInfo, VK_NULL_HANDLE,
+  //      &m_descriptorSetLayout);
+  //  if (result != VK_SUCCESS) {
+  //    qFatal("Failed to create descriptor set layout, code %d", result);
+  //  }
 
-  result = m_devFuncs->vkCreatePipelineLayout(
-      m_window->device(), &pipelineLayoutInfo, nullptr, &m_pipelineLayout);
-  if (result != VK_SUCCESS) {
-    qFatal("Failed to create pipeline layout, code: %d", result);
-  }
-
-  VkPipelineVertexInputStateCreateInfo vertexInputInfo{};
-  vertexInputInfo.sType =
-      VK_STRUCTURE_TYPE_PIPELINE_VERTEX_INPUT_STATE_CREATE_INFO;
-  vertexInputInfo.vertexBindingDescriptionCount = 0;
-  vertexInputInfo.pVertexBindingDescriptions = nullptr; // Optional
-  vertexInputInfo.vertexAttributeDescriptionCount = 0;
-  vertexInputInfo.pVertexAttributeDescriptions = nullptr; // Optional
+  VkPushConstantRange pushConstant{};
+  pushConstant.offset = 0;
+  // might be too big for some graphics cards, spec requires min 128 bytes (the
+  // validation layer will tell us)
+  pushConstant.size = sizeof(VertexUniformBufferObject);
+  pushConstant.stageFlags = VK_SHADER_STAGE_VERTEX_BIT;
 
   auto shaders =
       std::array<std::string, 2>{"shaders/vert.spv", "shaders/frag.spv"};
@@ -46,6 +52,30 @@ void VulkanRenderer::initResources() {
   fragShaderStageInfo.pName = "main";
   std::array<VkPipelineShaderStageCreateInfo, 2> shaderStages{
       vertShaderStageInfo, fragShaderStageInfo};
+
+  VkPipelineLayoutCreateInfo pipelineLayoutInfo{};
+  pipelineLayoutInfo.sType = VK_STRUCTURE_TYPE_PIPELINE_LAYOUT_CREATE_INFO;
+  // Note: switched to push constants instead
+  //  pipelineLayoutInfo.setLayoutCount = 1;
+  //  pipelineLayoutInfo.pSetLayouts = &m_descriptorSetLayout;
+  pipelineLayoutInfo.pushConstantRangeCount = 1;
+  pipelineLayoutInfo.pPushConstantRanges = &pushConstant;
+
+  result = m_devFuncs->vkCreatePipelineLayout(
+      m_window->device(), &pipelineLayoutInfo, VK_NULL_HANDLE,
+      &m_pipelineLayout);
+  if (result != VK_SUCCESS) {
+    qFatal("Failed to create pipeline layout, code: %d", result);
+  }
+
+  VkPipelineVertexInputStateCreateInfo vertexInputInfo{};
+  vertexInputInfo.sType =
+      VK_STRUCTURE_TYPE_PIPELINE_VERTEX_INPUT_STATE_CREATE_INFO;
+  vertexInputInfo.vertexBindingDescriptionCount = 0;
+  vertexInputInfo.pVertexBindingDescriptions = VK_NULL_HANDLE; // Optional
+  vertexInputInfo.vertexAttributeDescriptionCount = 0;
+  vertexInputInfo.pVertexAttributeDescriptions = VK_NULL_HANDLE; // Optional
+
   VkGraphicsPipelineCreateInfo pipelineInfo{};
   pipelineInfo.sType = VK_STRUCTURE_TYPE_GRAPHICS_PIPELINE_CREATE_INFO;
   pipelineInfo.stageCount = shaderStages.size();
@@ -114,34 +144,55 @@ void VulkanRenderer::initResources() {
   pipelineInfo.basePipelineIndex = -1;              // Optional
 
   result = m_devFuncs->vkCreateGraphicsPipelines(
-      m_window->device(), VK_NULL_HANDLE, 1, &pipelineInfo, nullptr,
+      m_window->device(), VK_NULL_HANDLE, 1, &pipelineInfo, VK_NULL_HANDLE,
       &m_graphicsPipeline);
   if (result != VK_SUCCESS) {
     qFatal("Failed to create graphics pipeline: code %d", result);
   }
 }
 
+void VulkanRenderer::initResources() {
+  QVulkanWindowRenderer::initResources();
+  m_devFuncs = m_window->vulkanInstance()->deviceFunctions(m_window->device());
+  createPipeline();
+}
+
 void VulkanRenderer::releaseResources() {
+  QVulkanWindowRenderer::releaseResources();
   m_devFuncs->vkDestroyPipeline(m_window->device(), m_graphicsPipeline,
-                                nullptr);
+                                VK_NULL_HANDLE);
   m_devFuncs->vkDestroyPipelineLayout(m_window->device(), m_pipelineLayout,
-                                      nullptr);
+                                      VK_NULL_HANDLE);
+  //  m_devFuncs->vkDestroyDescriptorSetLayout(
+  //      m_window->device(), m_descriptorSetLayout, VK_NULL_HANDLE);
   m_shaderLoader.destroyShaders(m_window->device(), m_devFuncs);
 }
 
+void VulkanRenderer::initSwapChainResources() {
+  QVulkanWindowRenderer::initSwapChainResources();
+  //  m_uniformBuffers.createBuffers(m_window, m_devFuncs);
+  m_worldView->initializeProjectionMatrix(m_window);
+}
+
+void VulkanRenderer::releaseSwapChainResources() {
+  QVulkanWindowRenderer::releaseSwapChainResources();
+  //  m_uniformBuffers.destroyBuffers(m_window, m_devFuncs);
+}
+
 void VulkanRenderer::startNextFrame() {
   VkCommandBuffer cmdBuf = m_window->currentCommandBuffer();
 
   VkClearDepthStencilValue clearDS = {1, 0};
   std::array<VkClearValue, 3> clearValue{};
-  float flash = std::abs(std::sin(static_cast<float>(m_frameNumber) / 120.f));
+  float flash =
+      std::abs(std::sin(static_cast<float>(m_frameNumber) / 80.f)) / 2.f;
   clearValue[0].color = {{0.0f, 0.0f, flash, 1.0f}};
   clearValue[1].depthStencil = clearDS;
   clearValue[2].color = clearValue[0].color;
 
   VkRenderPassBeginInfo rpInfo{};
   rpInfo.sType = VK_STRUCTURE_TYPE_RENDER_PASS_BEGIN_INFO;
-  rpInfo.pNext = nullptr;
+  rpInfo.pNext = VK_NULL_HANDLE;
 
   rpInfo.renderPass = m_window->defaultRenderPass();
   rpInfo.renderArea.offset.x = 0;
@@ -169,7 +220,12 @@ void VulkanRenderer::startNextFrame() {
   m_devFuncs->vkCmdBindPipeline(cmdBuf, VK_PIPELINE_BIND_POINT_GRAPHICS,
                                 m_graphicsPipeline);
 
-  m_devFuncs->vkCmdDraw(cmdBuf, 3, 1, 0, 0);
+  const VertexUniformBufferObject &mvp = m_worldView->getBufferObject();
+  m_devFuncs->vkCmdPushConstants(cmdBuf, m_pipelineLayout,
+                                 VK_SHADER_STAGE_VERTEX_BIT, 0,
+                                 sizeof(VertexUniformBufferObject), &mvp);
+
+  m_devFuncs->vkCmdDraw(cmdBuf, 12, 1, 0, 0);
 
   m_devFuncs->vkCmdEndRenderPass(cmdBuf);
   m_window->frameReady();

src/VulkanRenderer.h

@@ -1,26 +1,35 @@
 #ifndef VULKANCPPSETUP_VULKANRENDERER_H
 #define VULKANCPPSETUP_VULKANRENDERER_H
 
+#include "WorldView.h"
 #include "ShaderLoader.h"
+#include "UniformBuffers.h"
 #include <QVulkanWindowRenderer>
 #include <qvulkanfunctions.h>
 
 class VulkanRenderer : public QVulkanWindowRenderer {
 public:
-  explicit VulkanRenderer(QVulkanWindow *w);
+  explicit VulkanRenderer(QVulkanWindow *window, WorldView *worldView);
 
   void initResources() override;
   void releaseResources() override;
+  void initSwapChainResources() override;
+  void releaseSwapChainResources() override;
 
   void startNextFrame() override;
 
 private:
   QVulkanWindow *m_window;
+  WorldView *m_worldView;
   QVulkanDeviceFunctions *m_devFuncs{};
   unsigned long m_frameNumber{0UL};
   ShaderLoader m_shaderLoader{};
+//  UniformBuffers m_uniformBuffers{};
+//  VkDescriptorSetLayout m_descriptorSetLayout{};
   VkPipelineLayout m_pipelineLayout{};
   VkPipeline m_graphicsPipeline{};
+
+  void createPipeline();
 };
 
 #endif // VULKANCPPSETUP_VULKANRENDERER_H

src/VulkanWindow.cpp

@@ -3,16 +3,57 @@
 #include <qevent.h>
 
 static const int KEY_ESCAPE = 16777216;
+static const int KEY_W = 87;
+static const int KEY_A = 65;
+static const int KEY_S = 83;
+static const int KEY_D = 68;
 
 void VulkanWindow::keyPressEvent(QKeyEvent *event) {
   QWindow::keyPressEvent(event);
   qDebug() << "text" << event->text() << "key" << event->key() << "modifiers"
            << event->modifiers();
-  if (event->matches(QKeySequence::Quit) || event->key() == KEY_ESCAPE) {
+  if (event->key() == KEY_W) {
+    m_worldView.moveCamera(1.f);
+  } else if (event->key() == KEY_S) {
+    m_worldView.moveCamera(-1.f);
+  } else if (event->key() == KEY_A) {
+    m_worldView.strafeCamera(-1.f);
+  } else if (event->key() == KEY_D) {
+    m_worldView.strafeCamera(1.f);
+  } else if (event->matches(QKeySequence::Quit) || event->key() == KEY_ESCAPE) {
     close();
   }
 }
 
-QVulkanWindowRenderer *VulkanWindow::createRenderer() {
-  return new VulkanRenderer(this);
+void VulkanWindow::mousePressEvent(QMouseEvent *e)
+{
+  m_mousePressed = true;
+  m_lastMousePos = e->localPos().toPoint();
+}
+
+void VulkanWindow::mouseReleaseEvent(QMouseEvent *)
+{ m_mousePressed = false;
+}
+
+void VulkanWindow::mouseMoveEvent(QMouseEvent *e)
+{
+  if (!m_mousePressed)
+    return;
+
+  int dx = e->localPos().toPoint().x() - m_lastMousePos.x();
+  int dy = e->localPos().toPoint().y() - m_lastMousePos.y();
+
+  if (dy) {
+    m_worldView.pitchCamera(static_cast<float>(dy) / 10.0f);
+  }
+
+  if (dx) {
+    m_worldView.yawCamera(static_cast<float>(dx) / 10.0f);
+  }
+
+  m_lastMousePos = e->localPos().toPoint();
+}
+
+QVulkanWindowRenderer *VulkanWindow::createRenderer() {
+  return new VulkanRenderer(this, &m_worldView);
 }

src/VulkanWindow.h

@@ -1,13 +1,10 @@
-//
-// Created by ben on 13.01.22.
-//
-
 #ifndef VULKANCPPSETUP_VULKANWINDOW_H
 #define VULKANCPPSETUP_VULKANWINDOW_H
 
 #include <QVulkanWindow>
 #include <iostream>
 #include <qevent.h>
+#include "WorldView.h"
 
 class VulkanWindow : public QVulkanWindow {
 public:
@@ -15,6 +12,14 @@ public:
 
 protected:
   void keyPressEvent(QKeyEvent *event) override;
+  void mousePressEvent(QMouseEvent *event) override;
+  void mouseReleaseEvent(QMouseEvent *event) override;
+  void mouseMoveEvent(QMouseEvent *event) override;
+
+private:
+  WorldView m_worldView{};
+  bool m_mousePressed{false};
+  QPoint m_lastMousePos;
 };
 
 #endif // VULKANCPPSETUP_VULKANWINDOW_H

src/WorldView.cpp

@@ -0,0 +1,43 @@
+#include "WorldView.h"
+
+WorldView::WorldView() {
+//  m_modelMat.translate(0, 0, -5);
+//  m_modelMat.rotate(-90, 1, 0, 0);
+//  m_modelMat.scale(1.f, 1.f, 1.5f);
+}
+
+void WorldView::initializeProjectionMatrix(QVulkanWindow *window) {
+//  m_projectionMat = window->clipCorrectionMatrix();
+//  const QSize sz = window->swapChainImageSize();
+//  m_projectionMat.perspective(
+//      90.0f, static_cast<float>(sz.width()) / static_cast<float>(sz.height()),
+//      0.01f, 1000.0f);
+}
+
+VertexUniformBufferObject WorldView::getBufferObject() {
+  VertexUniformBufferObject obj{};
+  m_modelMat.copyDataTo(obj.model.data());
+  m_camera.viewMatrix().copyDataTo(obj.view.data());
+  m_projectionMat.copyDataTo(obj.proj.data());
+  return obj;
+}
+
+QVector4D WorldView::multiply(const QVector4D &vector) {
+  return m_projectionMat * m_camera.viewMatrix() * m_modelMat * vector;
+}
+
+void WorldView::pitchCamera(float degrees) {
+  m_camera.pitch(degrees);
+}
+
+void WorldView::yawCamera(float degrees) {
+  m_camera.yaw(degrees);
+}
+
+void WorldView::strafeCamera(float amount) {
+  m_camera.strafe(amount);
+}
+
+void WorldView::moveCamera(float amount) {
+  m_camera.walk(amount);
+}

src/WorldView.h

@@ -0,0 +1,26 @@
+#ifndef VULKANCPPSETUP_WORLDVIEW_H
+#define VULKANCPPSETUP_WORLDVIEW_H
+
+#include "camera.h"
+#include "VertexUniformBufferObject.h"
+#include <QMatrix4x4>
+#include <QVulkanWindow>
+
+class WorldView {
+public:
+  explicit WorldView();
+  void initializeProjectionMatrix(QVulkanWindow *window);
+  QVector4D multiply(const QVector4D &vector);
+  VertexUniformBufferObject getBufferObject();
+  void pitchCamera(float degrees);
+  void yawCamera(float degrees);
+  void moveCamera(float amount);
+  void strafeCamera(float amount);
+
+private:
+  QMatrix4x4 m_modelMat{};
+  QMatrix4x4 m_projectionMat{};
+  Camera m_camera{QVector3D{0.f, 0.f, -1.f}};
+};
+
+#endif // VULKANCPPSETUP_WORLDVIEW_H

src/camera.cpp

@@ -0,0 +1,112 @@
+/****************************************************************************
+**
+** Copyright (C) 2017 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the examples of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** BSD License Usage
+** Alternatively, you may use this file under the terms of the BSD license
+** as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of The Qt Company Ltd nor the names of its
+**     contributors may be used to endorse or promote products derived
+**     from this software without specific prior written permission.
+**
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "camera.h"
+
+Camera::Camera(const QVector3D &pos)
+    : m_forward(0.0f, 0.0f, -1.0f),
+      m_right(1.0f, 0.0f, 0.0f),
+      m_up(0.0f, 1.0f, 0.0f),
+      m_pos(pos),
+      m_yaw(0.0f),
+      m_pitch(0.0f)
+{
+}
+
+static inline void clamp360(float *v)
+{
+    if (*v > 360.0f)
+        *v -= 360.0f;
+    if (*v < -360.0f)
+        *v += 360.0f;
+}
+
+void Camera::yaw(float degrees)
+{
+    m_yaw += degrees;
+    clamp360(&m_yaw);
+    m_yawMatrix.setToIdentity();
+    m_yawMatrix.rotate(m_yaw, 0, 1, 0);
+
+    QMatrix4x4 rotMat = m_pitchMatrix * m_yawMatrix;
+    m_forward = (QVector4D(0.0f, 0.0f, -1.0f, 0.0f) * rotMat).toVector3D();
+    m_right = (QVector4D(1.0f, 0.0f, 0.0f, 0.0f) * rotMat).toVector3D();
+}
+
+void Camera::pitch(float degrees)
+{
+    m_pitch += degrees;
+    clamp360(&m_pitch);
+    m_pitchMatrix.setToIdentity();
+    m_pitchMatrix.rotate(m_pitch, 1, 0, 0);
+
+    QMatrix4x4 rotMat = m_pitchMatrix * m_yawMatrix;
+    m_forward = (QVector4D(0.0f, 0.0f, -1.0f, 0.0f) * rotMat).toVector3D();
+    m_up = (QVector4D(0.0f, 1.0f, 0.0f, 0.0f) * rotMat).toVector3D();
+}
+
+void Camera::walk(float amount)
+{
+    m_pos[0] += amount * m_forward.x();
+    m_pos[2] += amount * m_forward.z();
+}
+
+void Camera::strafe(float amount)
+{
+    m_pos[0] += amount * m_right.x();
+    m_pos[2] += amount * m_right.z();
+}
+
+QMatrix4x4 Camera::viewMatrix() const
+{
+    QMatrix4x4 m = m_pitchMatrix * m_yawMatrix;
+    m.translate(-m_pos);
+    return m;
+}

src/camera.h

@@ -0,0 +1,80 @@
+/****************************************************************************
+**
+** Copyright (C) 2017 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the examples of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** BSD License Usage
+** Alternatively, you may use this file under the terms of the BSD license
+** as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of The Qt Company Ltd nor the names of its
+**     contributors may be used to endorse or promote products derived
+**     from this software without specific prior written permission.
+**
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef CAMERA_H
+#define CAMERA_H
+
+#include <QVector3D>
+#include <QMatrix4x4>
+
+class Camera
+{
+public:
+    explicit Camera(const QVector3D &pos);
+
+    void yaw(float degrees);
+    void pitch(float degrees);
+    void walk(float amount);
+    void strafe(float amount);
+
+    [[nodiscard]] QMatrix4x4 viewMatrix() const;
+
+private:
+    QVector3D m_forward;
+    QVector3D m_right;
+    QVector3D m_up;
+    QVector3D m_pos;
+    float m_yaw;
+    float m_pitch;
+    QMatrix4x4 m_yawMatrix;
+    QMatrix4x4 m_pitchMatrix;
+};
+
+#endif

src/main.cpp

@@ -6,11 +6,15 @@ int main(int argc, char **argv) {
   QGuiApplication app(argc, argv);
 
   QVulkanInstance inst;
-  QByteArrayList layers{"VK_LAYER_LUNARG_standard_validation"};
+  QByteArrayList layers{"VK_LAYER_KHRONOS_validation"};
   inst.setLayers(layers);
   if (!inst.create()) {
-    qFatal("Could not create Vulkan instance %d", inst.errorCode());
-    return EXIT_FAILURE;
+    qFatal("Could not create Vulkan instance, code %d", inst.errorCode());
+  }
+  for (const auto& layer : layers) {
+    if (!inst.layers().contains(layer)) {
+      qFatal("Layer not available: %s", layer.toStdString().c_str());
+    }
   }
   VulkanWindow window{};
   window.setVulkanInstance(&inst);