sphericalHarmonics/simple_render_system.cpp at main · lsakunes/sphericalHarmonics · GitHub

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#include "simple_render_system.hpp"
#include <stdexcept>
#include <array>
#include <cassert>

#define GLM_FORCE_RADIANS
#define GLM_FORCE_DEPTH_ZERO_TO_ONE
#include <glm/glm.hpp>
#include <glm/gtc/constants.hpp>

namespace sve {

	struct SimplePushConstantData {
		glm::mat4 modelMatrix{1.f};
		glm::mat4 normalMatrix{1.f};
	};

	SimpleRenderSystem::SimpleRenderSystem(SveDevice& device, VkRenderPass renderPass, VkDescriptorSetLayout globalSetLayout) : sveDevice{ device } {
		createPipelineLayout(globalSetLayout);
		createPipeline(renderPass);
	}

	SimpleRenderSystem::~SimpleRenderSystem() {
		vkDestroyPipelineLayout(sveDevice.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(sveDevice.device(), &pipelineLayoutInfo, nullptr, &pipelineLayout) != VK_SUCCESS) {
			throw std::runtime_error("failed to create pipeline layout");
		}
	}

	void SimpleRenderSystem::createPipeline(VkRenderPass renderPass) {
		assert(pipelineLayout != nullptr && "Cannot create pipeline before pipeline layout");
		PipelineConfigInfo pipelineConfig{};
		SvePipeline::defaultPipelineConfigInfo(pipelineConfig);
		pipelineConfig.renderPass = renderPass;
		pipelineConfig.pipelineLayout = pipelineLayout;
		svePipeline = std::make_unique<SvePipeline>(
			sveDevice,
			"shaders/simple_shader.vert.spv",
			"shaders/simple_shader.frag.spv",
			pipelineConfig
		);
	}


	void SimpleRenderSystem::renderGameObjects(FrameInfo& frameInfo, std::vector<SveGameObject>& gameObjects) {
		svePipeline->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);
		}
	}
}