Moved example source files into sub folder
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saschawillems
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69 changed files with 685 additions and 164 deletions
710
examples/indirectdraw/indirectdraw.cpp
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710
examples/indirectdraw/indirectdraw.cpp
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/*
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* Vulkan Example - Indirect drawing
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*
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* Copyright (C) 2016 by Sascha Willems - www.saschawillems.de
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*
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* This code is licensed under the MIT license (MIT) (http://opensource.org/licenses/MIT)
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*
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* Summary:
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* Use a device local buffer that stores draw commands for instanced rendering of different meshes stored
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* in the same buffer.
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*
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* Indirect drawing offloads draw command generation and offers the ability to update them on the GPU
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* without the CPU having to touch the buffer again, also reducing the number of drawcalls.
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*
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* The example shows how to setup and fill such a buffer on the CPU side, stages it to the device and
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* shows how to render it using only one draw command.
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*
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* See readme.md for details
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*
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <assert.h>
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#include <time.h>
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#include <vector>
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#include <random>
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#define GLM_FORCE_RADIANS
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#define GLM_FORCE_DEPTH_ZERO_TO_ONE
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#include <glm/glm.hpp>
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#include <glm/gtc/matrix_transform.hpp>
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#include <vulkan/vulkan.h>
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#include "vulkanexamplebase.h"
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#include "VulkanBuffer.hpp"
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#include "VulkanTexture.hpp"
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#include "VulkanModel.hpp"
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#define VERTEX_BUFFER_BIND_ID 0
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#define INSTANCE_BUFFER_BIND_ID 1
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#define ENABLE_VALIDATION false
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// Number of instances per object
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#if defined(__ANDROID__)
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#define OBJECT_INSTANCE_COUNT 1024
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// Circular range of plant distribution
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#define PLANT_RADIUS 20.0f
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#else
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#define OBJECT_INSTANCE_COUNT 2048
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// Circular range of plant distribution
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#define PLANT_RADIUS 25.0f
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#endif
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class VulkanExample : public VulkanExampleBase
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{
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public:
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struct {
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vks::Texture2DArray plants;
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vks::Texture2D ground;
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} textures;
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// Vertex layout for the models
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vks::VertexLayout vertexLayout = vks::VertexLayout({
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vks::VERTEX_COMPONENT_POSITION,
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vks::VERTEX_COMPONENT_NORMAL,
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vks::VERTEX_COMPONENT_UV,
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vks::VERTEX_COMPONENT_COLOR,
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});
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struct {
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vks::Model plants;
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vks::Model ground;
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vks::Model skysphere;
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} models;
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struct {
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VkPipelineVertexInputStateCreateInfo inputState;
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std::vector<VkVertexInputBindingDescription> bindingDescriptions;
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std::vector<VkVertexInputAttributeDescription> attributeDescriptions;
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} vertices;
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// Per-instance data block
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struct InstanceData {
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glm::vec3 pos;
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glm::vec3 rot;
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float scale;
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uint32_t texIndex;
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};
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// Contains the instanced data
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vks::Buffer instanceBuffer;
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// Contains the indirect drawing commands
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vks::Buffer indirectCommandsBuffer;
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uint32_t indirectDrawCount;
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struct {
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glm::mat4 projection;
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glm::mat4 view;
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} uboVS;
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struct {
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vks::Buffer scene;
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} uniformData;
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struct {
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VkPipeline plants;
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VkPipeline ground;
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VkPipeline skysphere;
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} pipelines;
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VkPipelineLayout pipelineLayout;
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VkDescriptorSet descriptorSet;
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VkDescriptorSetLayout descriptorSetLayout;
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VkSampler samplerRepeat;
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uint32_t objectCount = 0;
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// Store the indirect draw commands containing index offsets and instance count per object
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std::vector<VkDrawIndexedIndirectCommand> indirectCommands;
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VulkanExample() : VulkanExampleBase(ENABLE_VALIDATION)
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{
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title = "Indirect rendering";
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camera.type = Camera::CameraType::firstperson;
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camera.setPerspective(60.0f, (float)width / (float)height, 0.1f, 512.0f);
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camera.setRotation(glm::vec3(-12.0f, 159.0f, 0.0f));
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camera.setTranslation(glm::vec3(0.4f, 1.25f, 0.0f));
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camera.movementSpeed = 5.0f;
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settings.overlay = true;
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}
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~VulkanExample()
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{
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vkDestroyPipeline(device, pipelines.plants, nullptr);
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vkDestroyPipeline(device, pipelines.ground, nullptr);
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vkDestroyPipeline(device, pipelines.skysphere, nullptr);
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vkDestroyPipelineLayout(device, pipelineLayout, nullptr);
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vkDestroyDescriptorSetLayout(device, descriptorSetLayout, nullptr);
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models.plants.destroy();
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models.ground.destroy();
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models.skysphere.destroy();
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textures.plants.destroy();
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textures.ground.destroy();
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instanceBuffer.destroy();
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indirectCommandsBuffer.destroy();
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uniformData.scene.destroy();
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}
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// Enable physical device features required for this example
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virtual void getEnabledFeatures()
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{
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// Example uses multi draw indirect if available
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if (deviceFeatures.multiDrawIndirect) {
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enabledFeatures.multiDrawIndirect = VK_TRUE;
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}
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// Enable anisotropic filtering if supported
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if (deviceFeatures.samplerAnisotropy) {
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enabledFeatures.samplerAnisotropy = VK_TRUE;
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}
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// Enable texture compression
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if (deviceFeatures.textureCompressionBC) {
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enabledFeatures.textureCompressionBC = VK_TRUE;
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}
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else if (deviceFeatures.textureCompressionASTC_LDR) {
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enabledFeatures.textureCompressionASTC_LDR = VK_TRUE;
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}
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else if (deviceFeatures.textureCompressionETC2) {
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enabledFeatures.textureCompressionETC2 = VK_TRUE;
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}
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};
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void buildCommandBuffers()
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{
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VkCommandBufferBeginInfo cmdBufInfo = vks::initializers::commandBufferBeginInfo();
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VkClearValue clearValues[2];
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clearValues[0].color = { { 0.18f, 0.27f, 0.5f, 0.0f } };
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clearValues[1].depthStencil = { 1.0f, 0 };
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VkRenderPassBeginInfo renderPassBeginInfo = vks::initializers::renderPassBeginInfo();
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renderPassBeginInfo.renderPass = renderPass;
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renderPassBeginInfo.renderArea.extent.width = width;
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renderPassBeginInfo.renderArea.extent.height = height;
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renderPassBeginInfo.clearValueCount = 2;
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renderPassBeginInfo.pClearValues = clearValues;
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for (int32_t i = 0; i < drawCmdBuffers.size(); ++i)
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{
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// Set target frame buffer
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renderPassBeginInfo.framebuffer = frameBuffers[i];
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VK_CHECK_RESULT(vkBeginCommandBuffer(drawCmdBuffers[i], &cmdBufInfo));
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vkCmdBeginRenderPass(drawCmdBuffers[i], &renderPassBeginInfo, VK_SUBPASS_CONTENTS_INLINE);
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VkViewport viewport = vks::initializers::viewport((float)width, (float)height, 0.0f, 1.0f);
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vkCmdSetViewport(drawCmdBuffers[i], 0, 1, &viewport);
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VkRect2D scissor = vks::initializers::rect2D(width, height, 0, 0);
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vkCmdSetScissor(drawCmdBuffers[i], 0, 1, &scissor);
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VkDeviceSize offsets[1] = { 0 };
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vkCmdBindDescriptorSets(drawCmdBuffers[i], VK_PIPELINE_BIND_POINT_GRAPHICS, pipelineLayout, 0, 1, &descriptorSet, 0, NULL);
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// Plants
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vkCmdBindPipeline(drawCmdBuffers[i], VK_PIPELINE_BIND_POINT_GRAPHICS, pipelines.plants);
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// Binding point 0 : Mesh vertex buffer
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vkCmdBindVertexBuffers(drawCmdBuffers[i], VERTEX_BUFFER_BIND_ID, 1, &models.plants.vertices.buffer, offsets);
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// Binding point 1 : Instance data buffer
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vkCmdBindVertexBuffers(drawCmdBuffers[i], INSTANCE_BUFFER_BIND_ID, 1, &instanceBuffer.buffer, offsets);
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vkCmdBindIndexBuffer(drawCmdBuffers[i], models.plants.indices.buffer, 0, VK_INDEX_TYPE_UINT32);
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// If the multi draw feature is supported:
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// One draw call for an arbitrary number of ojects
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// Index offsets and instance count are taken from the indirect buffer
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if (vulkanDevice->features.multiDrawIndirect)
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{
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vkCmdDrawIndexedIndirect(drawCmdBuffers[i], indirectCommandsBuffer.buffer, 0, indirectDrawCount, sizeof(VkDrawIndexedIndirectCommand));
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}
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else
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{
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// If multi draw is not available, we must issue separate draw commands
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for (auto j = 0; j < indirectCommands.size(); j++)
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{
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vkCmdDrawIndexedIndirect(drawCmdBuffers[i], indirectCommandsBuffer.buffer, j * sizeof(VkDrawIndexedIndirectCommand), 1, sizeof(VkDrawIndexedIndirectCommand));
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}
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}
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// Ground
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vkCmdBindPipeline(drawCmdBuffers[i], VK_PIPELINE_BIND_POINT_GRAPHICS, pipelines.ground);
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vkCmdBindVertexBuffers(drawCmdBuffers[i], VERTEX_BUFFER_BIND_ID, 1, &models.ground.vertices.buffer, offsets);
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vkCmdBindIndexBuffer(drawCmdBuffers[i], models.ground.indices.buffer, 0, VK_INDEX_TYPE_UINT32);
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vkCmdDrawIndexed(drawCmdBuffers[i], models.ground.indexCount, 1, 0, 0, 0);
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// Skysphere
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vkCmdBindPipeline(drawCmdBuffers[i], VK_PIPELINE_BIND_POINT_GRAPHICS, pipelines.skysphere);
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vkCmdBindVertexBuffers(drawCmdBuffers[i], VERTEX_BUFFER_BIND_ID, 1, &models.skysphere.vertices.buffer, offsets);
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vkCmdBindIndexBuffer(drawCmdBuffers[i], models.skysphere.indices.buffer, 0, VK_INDEX_TYPE_UINT32);
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vkCmdDrawIndexed(drawCmdBuffers[i], models.skysphere.indexCount, 1, 0, 0, 0);
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vkCmdEndRenderPass(drawCmdBuffers[i]);
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VK_CHECK_RESULT(vkEndCommandBuffer(drawCmdBuffers[i]));
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}
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}
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void loadAssets()
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{
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models.plants.loadFromFile(getAssetPath() + "models/plants.dae", vertexLayout, 0.0025f, vulkanDevice, queue);
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models.ground.loadFromFile(getAssetPath() + "models/plane_circle.dae", vertexLayout, PLANT_RADIUS + 1.0f, vulkanDevice, queue);
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models.skysphere.loadFromFile(getAssetPath() + "models/skysphere.dae", vertexLayout, 512.0f / 10.0f, vulkanDevice, queue);
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// Textures
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std::string texFormatSuffix;
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VkFormat texFormat;
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// Get supported compressed texture format
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if (vulkanDevice->features.textureCompressionBC) {
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texFormatSuffix = "_bc3_unorm";
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texFormat = VK_FORMAT_BC3_UNORM_BLOCK;
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}
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else if (vulkanDevice->features.textureCompressionASTC_LDR) {
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texFormatSuffix = "_astc_8x8_unorm";
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texFormat = VK_FORMAT_ASTC_8x8_UNORM_BLOCK;
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}
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else if (vulkanDevice->features.textureCompressionETC2) {
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texFormatSuffix = "_etc2_unorm";
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texFormat = VK_FORMAT_ETC2_R8G8B8A8_UNORM_BLOCK;
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}
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else {
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vks::tools::exitFatal("Device does not support any compressed texture format!", "Error");
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}
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textures.plants.loadFromFile(getAssetPath() + "textures/texturearray_plants" + texFormatSuffix + ".ktx", texFormat, vulkanDevice, queue);
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textures.ground.loadFromFile(getAssetPath() + "textures/ground_dry" + texFormatSuffix + ".ktx", texFormat, vulkanDevice, queue);
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}
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void setupVertexDescriptions()
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{
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// Binding description
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vertices.bindingDescriptions.resize(2);
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// Mesh vertex buffer (description) at binding point 0
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vertices.bindingDescriptions[0] =
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vks::initializers::vertexInputBindingDescription(
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VERTEX_BUFFER_BIND_ID,
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vertexLayout.stride(),
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// Input rate for the data passed to shader
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// Step for each vertex rendered
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VK_VERTEX_INPUT_RATE_VERTEX);
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vertices.bindingDescriptions[1] =
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vks::initializers::vertexInputBindingDescription(
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INSTANCE_BUFFER_BIND_ID,
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sizeof(InstanceData),
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// Input rate for the data passed to shader
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// Step for each instance rendered
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VK_VERTEX_INPUT_RATE_INSTANCE);
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// Attribute descriptions
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// Describes memory layout and shader positions
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vertices.attributeDescriptions.clear();
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// Per-Vertex attributes
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// Location 0 : Position
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vertices.attributeDescriptions.push_back(
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vks::initializers::vertexInputAttributeDescription(
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VERTEX_BUFFER_BIND_ID,
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0,
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VK_FORMAT_R32G32B32_SFLOAT,
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0)
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);
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// Location 1 : Normal
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vertices.attributeDescriptions.push_back(
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vks::initializers::vertexInputAttributeDescription(
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VERTEX_BUFFER_BIND_ID,
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1,
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VK_FORMAT_R32G32B32_SFLOAT,
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sizeof(float) * 3)
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);
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// Location 2 : Texture coordinates
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vertices.attributeDescriptions.push_back(
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vks::initializers::vertexInputAttributeDescription(
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VERTEX_BUFFER_BIND_ID,
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2,
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VK_FORMAT_R32G32_SFLOAT,
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sizeof(float) * 6)
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);
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// Location 3 : Color
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vertices.attributeDescriptions.push_back(
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vks::initializers::vertexInputAttributeDescription(
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VERTEX_BUFFER_BIND_ID,
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3,
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VK_FORMAT_R32G32B32_SFLOAT,
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sizeof(float) * 8)
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);
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// Instanced attributes
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// Location 4: Position
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vertices.attributeDescriptions.push_back(
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vks::initializers::vertexInputAttributeDescription(
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INSTANCE_BUFFER_BIND_ID, 4, VK_FORMAT_R32G32B32_SFLOAT, offsetof(InstanceData, pos))
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);
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// Location 5: Rotation
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vertices.attributeDescriptions.push_back(
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vks::initializers::vertexInputAttributeDescription(
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INSTANCE_BUFFER_BIND_ID, 5, VK_FORMAT_R32G32B32_SFLOAT, offsetof(InstanceData, rot))
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);
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// Location 6: Scale
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vertices.attributeDescriptions.push_back(
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vks::initializers::vertexInputAttributeDescription(
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INSTANCE_BUFFER_BIND_ID, 6, VK_FORMAT_R32_SFLOAT, offsetof(InstanceData, scale))
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);
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// Location 7: Texture array layer index
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vertices.attributeDescriptions.push_back(
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vks::initializers::vertexInputAttributeDescription(
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INSTANCE_BUFFER_BIND_ID, 7, VK_FORMAT_R32_SINT, offsetof(InstanceData, texIndex))
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);
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vertices.inputState = vks::initializers::pipelineVertexInputStateCreateInfo();
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vertices.inputState.vertexBindingDescriptionCount = static_cast<uint32_t>(vertices.bindingDescriptions.size());
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vertices.inputState.pVertexBindingDescriptions = vertices.bindingDescriptions.data();
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vertices.inputState.vertexAttributeDescriptionCount = static_cast<uint32_t>(vertices.attributeDescriptions.size());
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vertices.inputState.pVertexAttributeDescriptions = vertices.attributeDescriptions.data();
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}
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void setupDescriptorPool()
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{
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// Example uses one ubo
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std::vector<VkDescriptorPoolSize> poolSizes =
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{
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vks::initializers::descriptorPoolSize(VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER, 1),
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vks::initializers::descriptorPoolSize(VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, 2),
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};
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VkDescriptorPoolCreateInfo descriptorPoolInfo =
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vks::initializers::descriptorPoolCreateInfo(
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static_cast<uint32_t>(poolSizes.size()),
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poolSizes.data(),
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2);
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VK_CHECK_RESULT(vkCreateDescriptorPool(device, &descriptorPoolInfo, nullptr, &descriptorPool));
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}
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void setupDescriptorSetLayout()
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{
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std::vector<VkDescriptorSetLayoutBinding> setLayoutBindings =
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{
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// Binding 0: Vertex shader uniform buffer
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vks::initializers::descriptorSetLayoutBinding(
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VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER,
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VK_SHADER_STAGE_VERTEX_BIT,
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0),
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// Binding 1: Fragment shader combined sampler (plants texture array)
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vks::initializers::descriptorSetLayoutBinding(
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VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER,
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VK_SHADER_STAGE_FRAGMENT_BIT,
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1),
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// Binding 1: Fragment shader combined sampler (ground texture)
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vks::initializers::descriptorSetLayoutBinding(
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VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER,
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VK_SHADER_STAGE_FRAGMENT_BIT,
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2),
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};
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VkDescriptorSetLayoutCreateInfo descriptorLayout =
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vks::initializers::descriptorSetLayoutCreateInfo(
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setLayoutBindings.data(),
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static_cast<uint32_t>(setLayoutBindings.size()));
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VK_CHECK_RESULT(vkCreateDescriptorSetLayout(device, &descriptorLayout, nullptr, &descriptorSetLayout));
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VkPipelineLayoutCreateInfo pPipelineLayoutCreateInfo =
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vks::initializers::pipelineLayoutCreateInfo(
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&descriptorSetLayout,
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1);
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VK_CHECK_RESULT(vkCreatePipelineLayout(device, &pPipelineLayoutCreateInfo, nullptr, &pipelineLayout));
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}
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void setupDescriptorSet()
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{
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VkDescriptorSetAllocateInfo allocInfo =
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vks::initializers::descriptorSetAllocateInfo(
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descriptorPool,
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&descriptorSetLayout,
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1);
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VK_CHECK_RESULT(vkAllocateDescriptorSets(device, &allocInfo, &descriptorSet));
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std::vector<VkWriteDescriptorSet> writeDescriptorSets =
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{
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// Binding 0: Vertex shader uniform buffer
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vks::initializers::writeDescriptorSet(
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descriptorSet,
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VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER,
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0,
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&uniformData.scene.descriptor),
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// Binding 1: Plants texture array combined
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vks::initializers::writeDescriptorSet(
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||||
descriptorSet,
|
||||
VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER,
|
||||
1,
|
||||
&textures.plants.descriptor),
|
||||
// Binding 2: Ground texture combined
|
||||
vks::initializers::writeDescriptorSet(
|
||||
descriptorSet,
|
||||
VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER,
|
||||
2,
|
||||
&textures.ground.descriptor)
|
||||
};
|
||||
|
||||
vkUpdateDescriptorSets(device, static_cast<uint32_t>(writeDescriptorSets.size()), writeDescriptorSets.data(), 0, NULL);
|
||||
}
|
||||
|
||||
void preparePipelines()
|
||||
{
|
||||
VkPipelineInputAssemblyStateCreateInfo inputAssemblyState =
|
||||
vks::initializers::pipelineInputAssemblyStateCreateInfo(
|
||||
VK_PRIMITIVE_TOPOLOGY_TRIANGLE_LIST,
|
||||
0,
|
||||
VK_FALSE);
|
||||
|
||||
VkPipelineRasterizationStateCreateInfo rasterizationState =
|
||||
vks::initializers::pipelineRasterizationStateCreateInfo(
|
||||
VK_POLYGON_MODE_FILL,
|
||||
VK_CULL_MODE_NONE,
|
||||
VK_FRONT_FACE_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
|
||||
};
|
||||
VkPipelineDynamicStateCreateInfo dynamicState =
|
||||
vks::initializers::pipelineDynamicStateCreateInfo(
|
||||
dynamicStateEnables.data(),
|
||||
static_cast<uint32_t>(dynamicStateEnables.size()),
|
||||
0);
|
||||
|
||||
VkGraphicsPipelineCreateInfo pipelineCreateInfo =
|
||||
vks::initializers::pipelineCreateInfo(
|
||||
pipelineLayout,
|
||||
renderPass,
|
||||
0);
|
||||
|
||||
std::array<VkPipelineShaderStageCreateInfo, 2> shaderStages;
|
||||
|
||||
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 = static_cast<uint32_t>(shaderStages.size());
|
||||
pipelineCreateInfo.pStages = shaderStages.data();
|
||||
|
||||
// Indirect (and instanced) pipeline for the plants
|
||||
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);
|
||||
VK_CHECK_RESULT(vkCreateGraphicsPipelines(device, pipelineCache, 1, &pipelineCreateInfo, nullptr, &pipelines.plants));
|
||||
|
||||
// Ground
|
||||
shaderStages[0] = loadShader(getAssetPath() + "shaders/indirectdraw/ground.vert.spv", VK_SHADER_STAGE_VERTEX_BIT);
|
||||
shaderStages[1] = loadShader(getAssetPath() + "shaders/indirectdraw/ground.frag.spv", VK_SHADER_STAGE_FRAGMENT_BIT);
|
||||
//rasterizationState.cullMode = VK_CULL_MODE_BACK_BIT;
|
||||
VK_CHECK_RESULT(vkCreateGraphicsPipelines(device, pipelineCache, 1, &pipelineCreateInfo, nullptr, &pipelines.ground));
|
||||
|
||||
// Skysphere
|
||||
shaderStages[0] = loadShader(getAssetPath() + "shaders/indirectdraw/skysphere.vert.spv", VK_SHADER_STAGE_VERTEX_BIT);
|
||||
shaderStages[1] = loadShader(getAssetPath() + "shaders/indirectdraw/skysphere.frag.spv", VK_SHADER_STAGE_FRAGMENT_BIT);
|
||||
//rasterizationState.cullMode = VK_CULL_MODE_FRONT_BIT;
|
||||
VK_CHECK_RESULT(vkCreateGraphicsPipelines(device, pipelineCache, 1, &pipelineCreateInfo, nullptr, &pipelines.skysphere));
|
||||
}
|
||||
|
||||
// Prepare (and stage) a buffer containing the indirect draw commands
|
||||
void prepareIndirectData()
|
||||
{
|
||||
indirectCommands.clear();
|
||||
|
||||
// Create on indirect command for each mesh in the scene
|
||||
uint32_t m = 0;
|
||||
for (auto& modelPart : models.plants.parts)
|
||||
{
|
||||
VkDrawIndexedIndirectCommand indirectCmd{};
|
||||
indirectCmd.instanceCount = OBJECT_INSTANCE_COUNT;
|
||||
indirectCmd.firstInstance = m * OBJECT_INSTANCE_COUNT;
|
||||
indirectCmd.firstIndex = modelPart.indexBase;
|
||||
indirectCmd.indexCount = modelPart.indexCount;
|
||||
|
||||
indirectCommands.push_back(indirectCmd);
|
||||
|
||||
m++;
|
||||
}
|
||||
|
||||
indirectDrawCount = static_cast<uint32_t>(indirectCommands.size());
|
||||
|
||||
objectCount = 0;
|
||||
for (auto indirectCmd : indirectCommands)
|
||||
{
|
||||
objectCount += indirectCmd.instanceCount;
|
||||
}
|
||||
|
||||
vks::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));
|
||||
|
||||
vulkanDevice->copyBuffer(&stagingBuffer, &indirectCommandsBuffer, queue);
|
||||
|
||||
stagingBuffer.destroy();
|
||||
}
|
||||
|
||||
// Prepare (and stage) a buffer containing instanced data for the mesh draws
|
||||
void prepareInstanceData()
|
||||
{
|
||||
std::vector<InstanceData> instanceData;
|
||||
instanceData.resize(objectCount);
|
||||
|
||||
std::mt19937 rndGenerator((unsigned)time(NULL));
|
||||
std::uniform_real_distribution<float> uniformDist(0.0f, 1.0f);
|
||||
|
||||
for (uint32_t i = 0; i < objectCount; i++)
|
||||
{
|
||||
instanceData[i].rot = glm::vec3(0.0f, float(M_PI) * uniformDist(rndGenerator), 0.0f);
|
||||
float theta = 2 * float(M_PI) * uniformDist(rndGenerator);
|
||||
float phi = acos(1 - 2 * uniformDist(rndGenerator));
|
||||
instanceData[i].pos = glm::vec3(sin(phi) * cos(theta), 0.0f, cos(phi)) * PLANT_RADIUS;
|
||||
instanceData[i].scale = 1.0f + uniformDist(rndGenerator) * 2.0f;
|
||||
instanceData[i].texIndex = i / OBJECT_INSTANCE_COUNT;
|
||||
}
|
||||
|
||||
vks::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));
|
||||
|
||||
vulkanDevice->copyBuffer(&stagingBuffer, &instanceBuffer, queue);
|
||||
|
||||
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 = camera.matrices.perspective;
|
||||
uboVS.view = camera.matrices.view;
|
||||
}
|
||||
|
||||
memcpy(uniformData.scene.mapped, &uboVS, sizeof(uboVS));
|
||||
}
|
||||
|
||||
void draw()
|
||||
{
|
||||
VulkanExampleBase::prepareFrame();
|
||||
|
||||
// Command buffer to be submitted 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();
|
||||
loadAssets();
|
||||
prepareIndirectData();
|
||||
prepareInstanceData();
|
||||
setupVertexDescriptions();
|
||||
prepareUniformBuffers();
|
||||
setupDescriptorSetLayout();
|
||||
preparePipelines();
|
||||
setupDescriptorPool();
|
||||
setupDescriptorSet();
|
||||
buildCommandBuffers();
|
||||
prepared = true;
|
||||
}
|
||||
|
||||
virtual void render()
|
||||
{
|
||||
if (!prepared)
|
||||
{
|
||||
return;
|
||||
}
|
||||
draw();
|
||||
}
|
||||
|
||||
virtual void viewChanged()
|
||||
{
|
||||
updateUniformBuffer(true);
|
||||
}
|
||||
|
||||
virtual void OnUpdateUIOverlay(vks::UIOverlay *overlay)
|
||||
{
|
||||
if (!vulkanDevice->features.multiDrawIndirect) {
|
||||
if (overlay->header("Info")) {
|
||||
overlay->text("multiDrawIndirect not supported");
|
||||
}
|
||||
}
|
||||
if (overlay->header("Statistics")) {
|
||||
overlay->text("Objects: %d", objectCount);
|
||||
}
|
||||
}
|
||||
};
|
||||
|
||||
VULKAN_EXAMPLE_MAIN()
|
||||
Loading…
Add table
Add a link
Reference in a new issue