From 8045b8ba04aae39a4cf9733e72413f648b6ebe2b Mon Sep 17 00:00:00 2001
From: tylermurphy534 <tylermurphy534@gmail.com>
Date: Sun, 18 Sep 2022 21:20:51 -0400
Subject: stanford dragon rendering

---
 src/simple_render_system.cpp | 94 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 94 insertions(+)
 create mode 100644 src/simple_render_system.cpp

(limited to 'src/simple_render_system.cpp')

diff --git a/src/simple_render_system.cpp b/src/simple_render_system.cpp
new file mode 100644
index 0000000..6e4ab30
--- /dev/null
+++ b/src/simple_render_system.cpp
@@ -0,0 +1,94 @@
+#include "simple_render_system.hpp"
+#include "xe_device.hpp"
+#include <vector>
+#include <vulkan/vulkan_core.h>
+
+#define GLM_FORCE_RADIANS
+#define GLM_FORCE_DEPTH_ZERO_TO_ONE
+#include <glm/glm.hpp>
+#include <glm/gtc/constants.hpp>
+
+#include <array>
+#include <cassert>
+#include <stdexcept>
+
+namespace xe {
+
+struct SimplePushConstantData {
+  glm::mat4 modelMatrix{1.f};
+  glm::mat4 normalMatrix{1.f};
+};
+
+SimpleRenderSystem::SimpleRenderSystem(XeDevice& device, VkRenderPass renderPass, VkDescriptorSetLayout globalSetLayout) : xeDevice{device} {
+  createPipelineLayout(globalSetLayout);
+  createPipeline(renderPass);
+}
+
+SimpleRenderSystem::~SimpleRenderSystem() { vkDestroyPipelineLayout(xeDevice.device(), pipelineLayout, nullptr); }
+
+void SimpleRenderSystem::createPipelineLayout(VkDescriptorSetLayout globalSetLayout) {
+
+  VkPushConstantRange pushConstantRange;
+  pushConstantRange.stageFlags = VK_SHADER_STAGE_VERTEX_BIT | VK_SHADER_STAGE_FRAGMENT_BIT;
+  pushConstantRange.offset = 0;
+  pushConstantRange.size = sizeof(SimplePushConstantData);
+
+  std::vector<VkDescriptorSetLayout> descriptorSetLayouts{globalSetLayout};
+
+  VkPipelineLayoutCreateInfo pipelineLayoutInfo{};
+  pipelineLayoutInfo.sType = VK_STRUCTURE_TYPE_PIPELINE_LAYOUT_CREATE_INFO;
+  pipelineLayoutInfo.setLayoutCount = static_cast<uint32_t>(descriptorSetLayouts.size());
+  pipelineLayoutInfo.pSetLayouts = descriptorSetLayouts.data();
+  pipelineLayoutInfo.pushConstantRangeCount = 1;
+  pipelineLayoutInfo.pPushConstantRanges = &pushConstantRange;
+  if(vkCreatePipelineLayout(xeDevice.device(), &pipelineLayoutInfo, nullptr, &pipelineLayout) != VK_SUCCESS) {
+    std::runtime_error("failed to create pipeline layout!");
+  }
+}
+
+void SimpleRenderSystem::createPipeline(VkRenderPass renderPass) {
+  assert(pipelineLayout != nullptr && "Canor create pipeline before pipeline layout");
+
+  PipelineConfigInfo pipelineConfig{};
+  XePipeline::defaultPipelineConfigInfo(pipelineConfig);
+  pipelineConfig.renderPass = renderPass;
+  pipelineConfig.pipelineLayout = pipelineLayout;
+  xePipeline = std::make_unique<XePipeline>(
+    xeDevice,
+    "res/shaders/simple_shader.vert.spv",
+    "res/shaders/simple_shader.frag.spv",
+    pipelineConfig
+  );
+}
+
+void SimpleRenderSystem::renderGameObjects(XeFrameInfo &frameInfo, std::vector<XeGameObject> &gameObjects) {
+  xePipeline->bind(frameInfo.commandBuffer);
+
+  vkCmdBindDescriptorSets(
+    frameInfo.commandBuffer,
+    VK_PIPELINE_BIND_POINT_GRAPHICS,
+    pipelineLayout,
+    0,
+    1,
+    &frameInfo.globalDescriptorSet,
+    0,
+    nullptr);
+
+  for (auto& obj: gameObjects) {
+    SimplePushConstantData push{};
+    push.modelMatrix = obj.transform.mat4();
+    push.normalMatrix = obj.transform.normalMatrix();
+
+    vkCmdPushConstants(
+      frameInfo.commandBuffer, 
+      pipelineLayout, 
+      VK_SHADER_STAGE_VERTEX_BIT | VK_SHADER_STAGE_FRAGMENT_BIT, 
+      0, 
+      sizeof(SimplePushConstantData), 
+      &push);
+    obj.model->bind(frameInfo.commandBuffer);
+    obj.model->draw(frameInfo.commandBuffer);
+  }
+}
+
+}
\ No newline at end of file
-- 
cgit v1.2.3-freya