Started work on indirect draw example (wip)
This commit is contained in:
saschawillems
parent
919a510549
commit
c3207287b5
4 changed files with 882 additions and 0 deletions
719
indirectdraw/indirectdraw.cpp
Normal file
719
indirectdraw/indirectdraw.cpp
Normal file
|
|
@ -0,0 +1,719 @@
|
|||
/*
|
||||
* Vulkan Example - Indirect drawing
|
||||
*
|
||||
* Copyright (C) 2016 by Sascha Willems - www.saschawillems.de
|
||||
*
|
||||
* This code is licensed under the MIT license (MIT) (http://opensource.org/licenses/MIT)
|
||||
*
|
||||
* Summary:
|
||||
* Use a device local buffer that stores draw commands for instanced rendering of different meshes.
|
||||
*
|
||||
* Indirect drawing offloads draw command generation and offers the ability to update them on the GPU
|
||||
* without the CPU having to touch the buffer again, also reducing the number of drawcalls.
|
||||
*
|
||||
* The example shows how to setup and fill such a buffer on the CPU side, stages it to the device and
|
||||
* shows how render it using only one draw command.
|
||||
*
|
||||
*/
|
||||
|
||||
#include <stdio.h>
|
||||
#include <stdlib.h>
|
||||
#include <string.h>
|
||||
#include <assert.h>
|
||||
#include <time.h>
|
||||
#include <vector>
|
||||
#include <random>
|
||||
|
||||
#define GLM_FORCE_RADIANS
|
||||
#define GLM_FORCE_DEPTH_ZERO_TO_ONE
|
||||
#include <glm/glm.hpp>
|
||||
#include <glm/gtc/matrix_transform.hpp>
|
||||
|
||||
#include <vulkan/vulkan.h>
|
||||
#include "vulkanexamplebase.h"
|
||||
#include "vulkanbuffer.hpp"
|
||||
|
||||
#define VERTEX_BUFFER_BIND_ID 0
|
||||
#define INSTANCE_BUFFER_BIND_ID 1
|
||||
#define ENABLE_VALIDATION false
|
||||
|
||||
// Number of instances per object
|
||||
#define OBJECT_INSTANCE_COUNT 2048
|
||||
|
||||
// Vertex layout for this example
|
||||
std::vector<vkMeshLoader::VertexLayout> vertexLayout =
|
||||
{
|
||||
vkMeshLoader::VERTEX_LAYOUT_POSITION,
|
||||
vkMeshLoader::VERTEX_LAYOUT_NORMAL,
|
||||
vkMeshLoader::VERTEX_LAYOUT_UV,
|
||||
vkMeshLoader::VERTEX_LAYOUT_COLOR
|
||||
};
|
||||
|
||||
class VulkanExample : public VulkanExampleBase
|
||||
{
|
||||
public:
|
||||
struct {
|
||||
VkPipelineVertexInputStateCreateInfo inputState;
|
||||
std::vector<VkVertexInputBindingDescription> bindingDescriptions;
|
||||
std::vector<VkVertexInputAttributeDescription> attributeDescriptions;
|
||||
} vertices;
|
||||
|
||||
struct {
|
||||
vkMeshLoader::MeshBuffer example;
|
||||
} meshes;
|
||||
|
||||
struct {
|
||||
vkTools::VulkanTexture colorMap;
|
||||
} textures;
|
||||
|
||||
// Per-instance data block
|
||||
struct InstanceData {
|
||||
glm::vec3 pos;
|
||||
glm::vec3 rot;
|
||||
glm::vec3 color;
|
||||
float scale;
|
||||
uint32_t texIndex;
|
||||
};
|
||||
|
||||
// Contains the instanced data
|
||||
vk::Buffer instanceBuffer;
|
||||
// Contains the indirect drawing commands
|
||||
vk::Buffer indirectCommandsBuffer;
|
||||
uint32_t indirectDrawCount;
|
||||
|
||||
struct {
|
||||
glm::mat4 projection;
|
||||
glm::mat4 view;
|
||||
float time = 0.0f;
|
||||
} uboVS;
|
||||
|
||||
struct {
|
||||
vk::Buffer scene;
|
||||
} uniformData;
|
||||
|
||||
struct {
|
||||
VkPipeline solid;
|
||||
} pipelines;
|
||||
|
||||
VkPipelineLayout pipelineLayout;
|
||||
VkDescriptorSet descriptorSet;
|
||||
VkDescriptorSetLayout descriptorSetLayout;
|
||||
|
||||
uint32_t objectCount = 0;
|
||||
|
||||
// Store the indirect draw commands containing index offsets and instance count per object
|
||||
std::vector<VkDrawIndexedIndirectCommand> indirectCommands;
|
||||
|
||||
VulkanExample() : VulkanExampleBase(ENABLE_VALIDATION)
|
||||
{
|
||||
zoom = -12.0f;
|
||||
rotationSpeed = 0.25f;
|
||||
enableTextOverlay = true;
|
||||
title = "Vulkan Example - Indirect rendering";
|
||||
srand(time(NULL));
|
||||
}
|
||||
|
||||
~VulkanExample()
|
||||
{
|
||||
vkDestroyPipeline(device, pipelines.solid, nullptr);
|
||||
vkDestroyPipelineLayout(device, pipelineLayout, nullptr);
|
||||
vkDestroyDescriptorSetLayout(device, descriptorSetLayout, nullptr);
|
||||
vkMeshLoader::freeMeshBufferResources(device, &meshes.example);
|
||||
textureLoader->destroyTexture(textures.colorMap);
|
||||
instanceBuffer.destroy();
|
||||
indirectCommandsBuffer.destroy();
|
||||
uniformData.scene.destroy();
|
||||
}
|
||||
|
||||
void reBuildCommandBuffers()
|
||||
{
|
||||
if (!checkCommandBuffers())
|
||||
{
|
||||
destroyCommandBuffers();
|
||||
createCommandBuffers();
|
||||
}
|
||||
buildCommandBuffers();
|
||||
}
|
||||
|
||||
void buildCommandBuffers()
|
||||
{
|
||||
VkCommandBufferBeginInfo cmdBufInfo = vkTools::initializers::commandBufferBeginInfo();
|
||||
|
||||
VkClearValue clearValues[2];
|
||||
clearValues[0].color = { { 0.0f, 0.0f, 0.0f, 0.0f } };
|
||||
clearValues[1].depthStencil = { 1.0f, 0 };
|
||||
|
||||
VkRenderPassBeginInfo renderPassBeginInfo = vkTools::initializers::renderPassBeginInfo();
|
||||
renderPassBeginInfo.renderPass = renderPass;
|
||||
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 = vkTools::initializers::viewport((float)width, (float)height, 0.0f, 1.0f);
|
||||
vkCmdSetViewport(drawCmdBuffers[i], 0, 1, &viewport);
|
||||
|
||||
VkRect2D scissor = vkTools::initializers::rect2D(width, height, 0, 0);
|
||||
vkCmdSetScissor(drawCmdBuffers[i], 0, 1, &scissor);
|
||||
|
||||
vkCmdBindDescriptorSets(drawCmdBuffers[i], VK_PIPELINE_BIND_POINT_GRAPHICS, pipelineLayout, 0, 1, &descriptorSet, 0, NULL);
|
||||
vkCmdBindPipeline(drawCmdBuffers[i], VK_PIPELINE_BIND_POINT_GRAPHICS, pipelines.solid);
|
||||
|
||||
VkDeviceSize offsets[1] = { 0 };
|
||||
// Binding point 0 : Mesh vertex buffer
|
||||
vkCmdBindVertexBuffers(drawCmdBuffers[i], VERTEX_BUFFER_BIND_ID, 1, &meshes.example.vertices.buf, offsets);
|
||||
// Binding point 1 : Instance data buffer
|
||||
vkCmdBindVertexBuffers(drawCmdBuffers[i], INSTANCE_BUFFER_BIND_ID, 1, &instanceBuffer.buffer, offsets);
|
||||
|
||||
vkCmdBindIndexBuffer(drawCmdBuffers[i], meshes.example.indices.buf, 0, VK_INDEX_TYPE_UINT32);
|
||||
|
||||
// One draw call for an arbitrary number of ojects
|
||||
// Index offsets and instance count are taken from the indirect buffer
|
||||
vkCmdDrawIndexedIndirect(drawCmdBuffers[i], indirectCommandsBuffer.buffer, 0, indirectDrawCount, sizeof(VkDrawIndexedIndirectCommand));
|
||||
|
||||
vkCmdEndRenderPass(drawCmdBuffers[i]);
|
||||
|
||||
VK_CHECK_RESULT(vkEndCommandBuffer(drawCmdBuffers[i]));
|
||||
}
|
||||
}
|
||||
|
||||
void loadMeshes()
|
||||
{
|
||||
loadMesh(getAssetPath() + "models/basicmeshes.dae", &meshes.example, vertexLayout, 0.1f);
|
||||
}
|
||||
|
||||
void loadTextures()
|
||||
{
|
||||
textureLoader->loadTextureArray(
|
||||
getAssetPath() + "textures/texturearray_rocks_bc3.ktx",
|
||||
VK_FORMAT_BC3_UNORM_BLOCK,
|
||||
&textures.colorMap);
|
||||
}
|
||||
|
||||
void setupVertexDescriptions()
|
||||
{
|
||||
// Binding description
|
||||
vertices.bindingDescriptions.resize(2);
|
||||
|
||||
// Mesh vertex buffer (description) at binding point 0
|
||||
vertices.bindingDescriptions[0] =
|
||||
vkTools::initializers::vertexInputBindingDescription(
|
||||
VERTEX_BUFFER_BIND_ID,
|
||||
vkMeshLoader::vertexSize(vertexLayout),
|
||||
// Input rate for the data passed to shader
|
||||
// Step for each vertex rendered
|
||||
VK_VERTEX_INPUT_RATE_VERTEX);
|
||||
|
||||
vertices.bindingDescriptions[1] =
|
||||
vkTools::initializers::vertexInputBindingDescription(
|
||||
INSTANCE_BUFFER_BIND_ID,
|
||||
sizeof(InstanceData),
|
||||
// Input rate for the data passed to shader
|
||||
// Step for each instance rendered
|
||||
VK_VERTEX_INPUT_RATE_INSTANCE);
|
||||
|
||||
// Attribute descriptions
|
||||
// Describes memory layout and shader positions
|
||||
vertices.attributeDescriptions.clear();
|
||||
|
||||
// Per-Vertex attributes
|
||||
// Location 0 : Position
|
||||
vertices.attributeDescriptions.push_back(
|
||||
vkTools::initializers::vertexInputAttributeDescription(
|
||||
VERTEX_BUFFER_BIND_ID,
|
||||
0,
|
||||
VK_FORMAT_R32G32B32_SFLOAT,
|
||||
0)
|
||||
);
|
||||
// Location 1 : Normal
|
||||
vertices.attributeDescriptions.push_back(
|
||||
vkTools::initializers::vertexInputAttributeDescription(
|
||||
VERTEX_BUFFER_BIND_ID,
|
||||
1,
|
||||
VK_FORMAT_R32G32B32_SFLOAT,
|
||||
sizeof(float) * 3)
|
||||
);
|
||||
// Location 2 : Texture coordinates
|
||||
vertices.attributeDescriptions.push_back(
|
||||
vkTools::initializers::vertexInputAttributeDescription(
|
||||
VERTEX_BUFFER_BIND_ID,
|
||||
2,
|
||||
VK_FORMAT_R32G32_SFLOAT,
|
||||
sizeof(float) * 6)
|
||||
);
|
||||
// Location 3 : Color
|
||||
vertices.attributeDescriptions.push_back(
|
||||
vkTools::initializers::vertexInputAttributeDescription(
|
||||
VERTEX_BUFFER_BIND_ID,
|
||||
3,
|
||||
VK_FORMAT_R32G32B32_SFLOAT,
|
||||
sizeof(float) * 8)
|
||||
);
|
||||
|
||||
// Instanced attributes
|
||||
// Location 4: Position
|
||||
vertices.attributeDescriptions.push_back(
|
||||
vkTools::initializers::vertexInputAttributeDescription(
|
||||
INSTANCE_BUFFER_BIND_ID, 4, VK_FORMAT_R32G32B32_SFLOAT, offsetof(InstanceData, pos))
|
||||
);
|
||||
// Location 5: Rotation
|
||||
vertices.attributeDescriptions.push_back(
|
||||
vkTools::initializers::vertexInputAttributeDescription(
|
||||
INSTANCE_BUFFER_BIND_ID, 5, VK_FORMAT_R32G32B32_SFLOAT, offsetof(InstanceData, rot))
|
||||
);
|
||||
// Location 6: Color
|
||||
vertices.attributeDescriptions.push_back(
|
||||
vkTools::initializers::vertexInputAttributeDescription(
|
||||
INSTANCE_BUFFER_BIND_ID, 6, VK_FORMAT_R32G32B32_SFLOAT, offsetof(InstanceData, color))
|
||||
);
|
||||
// Location 6: Scale
|
||||
vertices.attributeDescriptions.push_back(
|
||||
vkTools::initializers::vertexInputAttributeDescription(
|
||||
INSTANCE_BUFFER_BIND_ID, 7, VK_FORMAT_R32_SFLOAT, offsetof(InstanceData, scale))
|
||||
);
|
||||
// Location 7: Texture array layer index
|
||||
vertices.attributeDescriptions.push_back(
|
||||
vkTools::initializers::vertexInputAttributeDescription(
|
||||
INSTANCE_BUFFER_BIND_ID, 8, VK_FORMAT_R32_SINT, offsetof(InstanceData, texIndex))
|
||||
);
|
||||
|
||||
vertices.inputState = vkTools::initializers::pipelineVertexInputStateCreateInfo();
|
||||
vertices.inputState.vertexBindingDescriptionCount = vertices.bindingDescriptions.size();
|
||||
vertices.inputState.pVertexBindingDescriptions = vertices.bindingDescriptions.data();
|
||||
vertices.inputState.vertexAttributeDescriptionCount = vertices.attributeDescriptions.size();
|
||||
vertices.inputState.pVertexAttributeDescriptions = vertices.attributeDescriptions.data();
|
||||
}
|
||||
|
||||
void setupDescriptorPool()
|
||||
{
|
||||
// Example uses one ubo
|
||||
std::vector<VkDescriptorPoolSize> poolSizes =
|
||||
{
|
||||
vkTools::initializers::descriptorPoolSize(VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER, 1),
|
||||
vkTools::initializers::descriptorPoolSize(VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, 1),
|
||||
};
|
||||
|
||||
VkDescriptorPoolCreateInfo descriptorPoolInfo =
|
||||
vkTools::initializers::descriptorPoolCreateInfo(
|
||||
poolSizes.size(),
|
||||
poolSizes.data(),
|
||||
2);
|
||||
|
||||
VK_CHECK_RESULT(vkCreateDescriptorPool(device, &descriptorPoolInfo, nullptr, &descriptorPool));
|
||||
}
|
||||
|
||||
void setupDescriptorSetLayout()
|
||||
{
|
||||
std::vector<VkDescriptorSetLayoutBinding> setLayoutBindings =
|
||||
{
|
||||
// Binding 0 : Vertex shader uniform buffer
|
||||
vkTools::initializers::descriptorSetLayoutBinding(
|
||||
VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER,
|
||||
VK_SHADER_STAGE_VERTEX_BIT,
|
||||
0),
|
||||
// Binding 1 : Fragment shader combined sampler
|
||||
vkTools::initializers::descriptorSetLayoutBinding(
|
||||
VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER,
|
||||
VK_SHADER_STAGE_FRAGMENT_BIT,
|
||||
1),
|
||||
};
|
||||
|
||||
VkDescriptorSetLayoutCreateInfo descriptorLayout =
|
||||
vkTools::initializers::descriptorSetLayoutCreateInfo(
|
||||
setLayoutBindings.data(),
|
||||
setLayoutBindings.size());
|
||||
|
||||
VK_CHECK_RESULT(vkCreateDescriptorSetLayout(device, &descriptorLayout, nullptr, &descriptorSetLayout));
|
||||
|
||||
VkPipelineLayoutCreateInfo pPipelineLayoutCreateInfo =
|
||||
vkTools::initializers::pipelineLayoutCreateInfo(
|
||||
&descriptorSetLayout,
|
||||
1);
|
||||
|
||||
VK_CHECK_RESULT(vkCreatePipelineLayout(device, &pPipelineLayoutCreateInfo, nullptr, &pipelineLayout));
|
||||
}
|
||||
|
||||
void setupDescriptorSet()
|
||||
{
|
||||
VkDescriptorSetAllocateInfo allocInfo =
|
||||
vkTools::initializers::descriptorSetAllocateInfo(
|
||||
descriptorPool,
|
||||
&descriptorSetLayout,
|
||||
1);
|
||||
|
||||
VK_CHECK_RESULT(vkAllocateDescriptorSets(device, &allocInfo, &descriptorSet));
|
||||
|
||||
VkDescriptorImageInfo texDescriptor =
|
||||
vkTools::initializers::descriptorImageInfo(
|
||||
textures.colorMap.sampler,
|
||||
textures.colorMap.view,
|
||||
VK_IMAGE_LAYOUT_GENERAL);
|
||||
|
||||
std::vector<VkWriteDescriptorSet> writeDescriptorSets =
|
||||
{
|
||||
// Binding 0 : Vertex shader uniform buffer
|
||||
vkTools::initializers::writeDescriptorSet(
|
||||
descriptorSet,
|
||||
VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER,
|
||||
0,
|
||||
&uniformData.scene.descriptor),
|
||||
// Binding 1 : Color map
|
||||
vkTools::initializers::writeDescriptorSet(
|
||||
descriptorSet,
|
||||
VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER,
|
||||
1,
|
||||
&texDescriptor)
|
||||
};
|
||||
|
||||
vkUpdateDescriptorSets(device, writeDescriptorSets.size(), writeDescriptorSets.data(), 0, NULL);
|
||||
}
|
||||
|
||||
void preparePipelines()
|
||||
{
|
||||
VkPipelineInputAssemblyStateCreateInfo inputAssemblyState =
|
||||
vkTools::initializers::pipelineInputAssemblyStateCreateInfo(
|
||||
VK_PRIMITIVE_TOPOLOGY_TRIANGLE_LIST,
|
||||
0,
|
||||
VK_FALSE);
|
||||
|
||||
VkPipelineRasterizationStateCreateInfo rasterizationState =
|
||||
vkTools::initializers::pipelineRasterizationStateCreateInfo(
|
||||
VK_POLYGON_MODE_FILL,
|
||||
VK_CULL_MODE_BACK_BIT,
|
||||
VK_FRONT_FACE_CLOCKWISE,
|
||||
0);
|
||||
|
||||
VkPipelineColorBlendAttachmentState blendAttachmentState =
|
||||
vkTools::initializers::pipelineColorBlendAttachmentState(
|
||||
0xf,
|
||||
VK_FALSE);
|
||||
|
||||
VkPipelineColorBlendStateCreateInfo colorBlendState =
|
||||
vkTools::initializers::pipelineColorBlendStateCreateInfo(
|
||||
1,
|
||||
&blendAttachmentState);
|
||||
|
||||
VkPipelineDepthStencilStateCreateInfo depthStencilState =
|
||||
vkTools::initializers::pipelineDepthStencilStateCreateInfo(
|
||||
VK_TRUE,
|
||||
VK_TRUE,
|
||||
VK_COMPARE_OP_LESS_OR_EQUAL);
|
||||
|
||||
VkPipelineViewportStateCreateInfo viewportState =
|
||||
vkTools::initializers::pipelineViewportStateCreateInfo(1, 1, 0);
|
||||
|
||||
VkPipelineMultisampleStateCreateInfo multisampleState =
|
||||
vkTools::initializers::pipelineMultisampleStateCreateInfo(
|
||||
VK_SAMPLE_COUNT_1_BIT,
|
||||
0);
|
||||
|
||||
std::vector<VkDynamicState> dynamicStateEnables = {
|
||||
VK_DYNAMIC_STATE_VIEWPORT,
|
||||
VK_DYNAMIC_STATE_SCISSOR
|
||||
};
|
||||
VkPipelineDynamicStateCreateInfo dynamicState =
|
||||
vkTools::initializers::pipelineDynamicStateCreateInfo(
|
||||
dynamicStateEnables.data(),
|
||||
dynamicStateEnables.size(),
|
||||
0);
|
||||
|
||||
// Instacing pipeline
|
||||
// Load shaders
|
||||
std::array<VkPipelineShaderStageCreateInfo, 2> shaderStages;
|
||||
|
||||
shaderStages[0] = loadShader(getAssetPath() + "shaders/indirectdraw/indirectdraw.vert.spv", VK_SHADER_STAGE_VERTEX_BIT);
|
||||
shaderStages[1] = loadShader(getAssetPath() + "shaders/indirectdraw/indirectdraw.frag.spv", VK_SHADER_STAGE_FRAGMENT_BIT);
|
||||
|
||||
VkGraphicsPipelineCreateInfo pipelineCreateInfo =
|
||||
vkTools::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.stageCount = shaderStages.size();
|
||||
pipelineCreateInfo.pStages = shaderStages.data();
|
||||
|
||||
VK_CHECK_RESULT(vkCreateGraphicsPipelines(device, pipelineCache, 1, &pipelineCreateInfo, nullptr, &pipelines.solid));
|
||||
}
|
||||
|
||||
// Prepare (and stage) a buffer containing the indirect draw commands
|
||||
void prepareIndirectData()
|
||||
{
|
||||
VkDrawIndexedIndirectCommand dic{};
|
||||
dic.firstInstance = 0;
|
||||
dic.instanceCount = OBJECT_INSTANCE_COUNT;
|
||||
|
||||
dic.firstIndex = 0;
|
||||
dic.indexCount = 36;
|
||||
indirectCommands.push_back(dic);
|
||||
|
||||
dic.firstInstance += OBJECT_INSTANCE_COUNT;
|
||||
dic.firstIndex = 36;
|
||||
dic.indexCount = 2880;
|
||||
indirectCommands.push_back(dic);
|
||||
|
||||
dic.firstInstance += OBJECT_INSTANCE_COUNT;
|
||||
dic.firstIndex = 2916;
|
||||
dic.indexCount = 186;
|
||||
indirectCommands.push_back(dic);
|
||||
|
||||
indirectDrawCount = static_cast<uint32_t>(indirectCommands.size());
|
||||
|
||||
objectCount = 0;
|
||||
for (auto indirectCmd : indirectCommands)
|
||||
{
|
||||
objectCount += indirectCmd.instanceCount;
|
||||
}
|
||||
|
||||
vk::Buffer stagingBuffer;
|
||||
VK_CHECK_RESULT(vulkanDevice->createBuffer(
|
||||
VK_BUFFER_USAGE_TRANSFER_SRC_BIT,
|
||||
VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT | VK_MEMORY_PROPERTY_HOST_COHERENT_BIT,
|
||||
&stagingBuffer,
|
||||
indirectCommands.size() * sizeof(VkDrawIndexedIndirectCommand),
|
||||
indirectCommands.data()));
|
||||
|
||||
VK_CHECK_RESULT(vulkanDevice->createBuffer(
|
||||
VK_BUFFER_USAGE_INDIRECT_BUFFER_BIT | VK_BUFFER_USAGE_TRANSFER_DST_BIT,
|
||||
VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT,
|
||||
&indirectCommandsBuffer,
|
||||
stagingBuffer.size));
|
||||
|
||||
// Copy to staging buffer
|
||||
VkCommandBuffer copyCmd = VulkanExampleBase::createCommandBuffer(VK_COMMAND_BUFFER_LEVEL_PRIMARY, true);
|
||||
|
||||
VkBufferCopy copyRegion = {};
|
||||
copyRegion.size = indirectCommandsBuffer.size;
|
||||
vkCmdCopyBuffer(
|
||||
copyCmd,
|
||||
stagingBuffer.buffer,
|
||||
indirectCommandsBuffer.buffer,
|
||||
1,
|
||||
©Region);
|
||||
|
||||
VulkanExampleBase::flushCommandBuffer(copyCmd, queue, true);
|
||||
|
||||
stagingBuffer.destroy();
|
||||
}
|
||||
|
||||
float rnd(float range)
|
||||
{
|
||||
return range * (rand() / double(RAND_MAX));
|
||||
}
|
||||
|
||||
// Prepare (and stage) a buffer containing instanced data for the mesh draws
|
||||
void prepareInstanceData()
|
||||
{
|
||||
std::vector<InstanceData> instanceData;
|
||||
instanceData.resize(objectCount);
|
||||
|
||||
std::mt19937 rndGenerator(time(NULL));
|
||||
std::uniform_real_distribution<double> uniformDist(0.0, 1.0);
|
||||
|
||||
for (auto i = 0; i < objectCount; i++)
|
||||
{
|
||||
instanceData[i].rot = glm::vec3(M_PI * uniformDist(rndGenerator), M_PI * uniformDist(rndGenerator), M_PI * uniformDist(rndGenerator));
|
||||
float theta = 2 * M_PI * uniformDist(rndGenerator);
|
||||
float phi = acos(1 - 2 * uniformDist(rndGenerator));
|
||||
glm::vec3 pos;
|
||||
instanceData[i].pos = glm::vec3(sin(phi) * cos(theta), sin(theta) * uniformDist(rndGenerator) / 1500.0f, cos(phi)) * 7.5f;
|
||||
instanceData[i].color = glm::vec3(rnd(1.0f), rnd(1.0f), rnd(1.0f));
|
||||
instanceData[i].scale = 1.0f + uniformDist(rndGenerator) * 2.0f;
|
||||
instanceData[i].texIndex = rnd(textures.colorMap.layerCount);
|
||||
}
|
||||
|
||||
vk::Buffer stagingBuffer;
|
||||
VK_CHECK_RESULT(vulkanDevice->createBuffer(
|
||||
VK_BUFFER_USAGE_TRANSFER_SRC_BIT,
|
||||
VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT | VK_MEMORY_PROPERTY_HOST_COHERENT_BIT,
|
||||
&stagingBuffer,
|
||||
instanceData.size() * sizeof(InstanceData),
|
||||
instanceData.data()));
|
||||
|
||||
VK_CHECK_RESULT(vulkanDevice->createBuffer(
|
||||
VK_BUFFER_USAGE_VERTEX_BUFFER_BIT | VK_BUFFER_USAGE_TRANSFER_DST_BIT,
|
||||
VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT,
|
||||
&instanceBuffer,
|
||||
stagingBuffer.size));
|
||||
|
||||
// Copy to staging buffer
|
||||
VkCommandBuffer copyCmd = VulkanExampleBase::createCommandBuffer(VK_COMMAND_BUFFER_LEVEL_PRIMARY, true);
|
||||
|
||||
VkBufferCopy copyRegion = { };
|
||||
copyRegion.size = instanceBuffer.size;
|
||||
vkCmdCopyBuffer(
|
||||
copyCmd,
|
||||
stagingBuffer.buffer,
|
||||
instanceBuffer.buffer,
|
||||
1,
|
||||
©Region);
|
||||
|
||||
VulkanExampleBase::flushCommandBuffer(copyCmd, queue, true);
|
||||
|
||||
stagingBuffer.destroy();
|
||||
}
|
||||
|
||||
void prepareUniformBuffers()
|
||||
{
|
||||
VK_CHECK_RESULT(vulkanDevice->createBuffer(
|
||||
VK_BUFFER_USAGE_UNIFORM_BUFFER_BIT,
|
||||
VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT | VK_MEMORY_PROPERTY_HOST_COHERENT_BIT,
|
||||
&uniformData.scene,
|
||||
sizeof(uboVS)));
|
||||
|
||||
VK_CHECK_RESULT(uniformData.scene.map());
|
||||
|
||||
updateUniformBuffer(true);
|
||||
}
|
||||
|
||||
void updateUniformBuffer(bool viewChanged)
|
||||
{
|
||||
if (viewChanged)
|
||||
{
|
||||
uboVS.projection = glm::perspective(glm::radians(60.0f), (float)width / (float)height, 0.001f, 256.0f);
|
||||
uboVS.view = glm::translate(glm::mat4(), cameraPos + glm::vec3(0.0f, 0.0f, zoom));
|
||||
uboVS.view = glm::rotate(uboVS.view, glm::radians(rotation.x), glm::vec3(1.0f, 0.0f, 0.0f));
|
||||
uboVS.view = glm::rotate(uboVS.view, glm::radians(rotation.y), glm::vec3(0.0f, 1.0f, 0.0f));
|
||||
uboVS.view = glm::rotate(uboVS.view, glm::radians(rotation.z), glm::vec3(0.0f, 0.0f, 1.0f));
|
||||
}
|
||||
|
||||
if (!paused)
|
||||
{
|
||||
uboVS.time += frameTimer * 0.05f;
|
||||
}
|
||||
|
||||
memcpy(uniformData.scene.mapped, &uboVS, sizeof(uboVS));
|
||||
}
|
||||
|
||||
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()
|
||||
{
|
||||
VulkanExampleBase::prepare();
|
||||
loadTextures();
|
||||
loadMeshes();
|
||||
prepareIndirectData();
|
||||
prepareInstanceData();
|
||||
setupVertexDescriptions();
|
||||
prepareUniformBuffers();
|
||||
setupDescriptorSetLayout();
|
||||
preparePipelines();
|
||||
setupDescriptorPool();
|
||||
setupDescriptorSet();
|
||||
buildCommandBuffers();
|
||||
prepared = true;
|
||||
}
|
||||
|
||||
virtual void render()
|
||||
{
|
||||
if (!prepared)
|
||||
{
|
||||
return;
|
||||
}
|
||||
draw();
|
||||
if (!paused)
|
||||
{
|
||||
updateUniformBuffer(false);
|
||||
}
|
||||
}
|
||||
|
||||
virtual void viewChanged()
|
||||
{
|
||||
updateUniformBuffer(true);
|
||||
}
|
||||
|
||||
virtual void getOverlayText(VulkanTextOverlay *textOverlay)
|
||||
{
|
||||
textOverlay->addText("Rendering " + std::to_string(objectCount) + " objects", 5.0f, 85.0f, VulkanTextOverlay::alignLeft);
|
||||
}
|
||||
};
|
||||
|
||||
VulkanExample *vulkanExample;
|
||||
|
||||
#if defined(_WIN32)
|
||||
LRESULT CALLBACK WndProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
|
||||
{
|
||||
if (vulkanExample != NULL)
|
||||
{
|
||||
vulkanExample->handleMessages(hWnd, uMsg, wParam, lParam);
|
||||
}
|
||||
return (DefWindowProc(hWnd, uMsg, wParam, lParam));
|
||||
}
|
||||
#elif defined(__linux__) && !defined(__ANDROID__)
|
||||
static void handleEvent(const xcb_generic_event_t *event)
|
||||
{
|
||||
if (vulkanExample != NULL)
|
||||
{
|
||||
vulkanExample->handleEvent(event);
|
||||
}
|
||||
}
|
||||
#endif
|
||||
|
||||
// Main entry point
|
||||
#if defined(_WIN32)
|
||||
// Windows entry point
|
||||
int APIENTRY WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR pCmdLine, int nCmdShow)
|
||||
#elif defined(__ANDROID__)
|
||||
// Android entry point
|
||||
void android_main(android_app* state)
|
||||
#elif defined(__linux__)
|
||||
// Linux entry point
|
||||
int main(const int argc, const char *argv[])
|
||||
#endif
|
||||
{
|
||||
#if defined(__ANDROID__)
|
||||
// Removing this may cause the compiler to omit the main entry point
|
||||
// which would make the application crash at start
|
||||
app_dummy();
|
||||
#endif
|
||||
vulkanExample = new VulkanExample();
|
||||
#if defined(_WIN32)
|
||||
vulkanExample->setupWindow(hInstance, WndProc);
|
||||
#elif defined(__ANDROID__)
|
||||
// Attach vulkan example to global android application state
|
||||
state->userData = vulkanExample;
|
||||
state->onAppCmd = VulkanExample::handleAppCommand;
|
||||
state->onInputEvent = VulkanExample::handleAppInput;
|
||||
vulkanExample->androidApp = state;
|
||||
#elif defined(__linux__)
|
||||
vulkanExample->setupWindow();
|
||||
#endif
|
||||
#if !defined(__ANDROID__)
|
||||
vulkanExample->initSwapchain();
|
||||
vulkanExample->prepare();
|
||||
#endif
|
||||
vulkanExample->renderLoop();
|
||||
delete(vulkanExample);
|
||||
#if !defined(__ANDROID__)
|
||||
return 0;
|
||||
#endif
|
||||
}
|
||||
Loading…
Add table
Add a link
Reference in a new issue