跟着cherno手搓游戏引擎【27】升级2DRenderer（添加旋转）

水节，添加了旋转的DrawQuad：

Renderer2D.h: 

#pragma once
#include "OrthographicCamera.h"
#include"Texture.h"
namespace YOTO {class Renderer2D{public://为什么渲染器是静态的：static void Init();static void ShutDown();static void BeginScene(const OrthographicCamera& camera);static void EndScene();static void DrawQuad(const glm::vec2& position, const glm::vec2& size ,const glm::vec4& color);static void DrawQuad(const glm::vec3& position, const glm::vec2& size ,const glm::vec4& color);static void DrawQuad(const glm::vec2& position, const glm::vec2& size ,const Ref<Texture2D> texture,float tilingFactor=1.0f,const glm::vec4& tintColor=glm::vec4(1.0f));static void DrawQuad(const glm::vec3& position, const glm::vec2& size ,const Ref<Texture2D> texture,float tilingFactor=1.0f,const glm::vec4& tintColor=glm::vec4(1.0f));static void DrawRotatedQuad(const glm::vec2& position, const glm::vec2& size, float rotation,const glm::vec4& color);static void DrawRotatedQuad(const glm::vec3& position, const glm::vec2& size, float rotation,const glm::vec4& color);static void DrawRotatedQuad(const glm::vec2& position, const glm::vec2& size, float rotation,const Ref<Texture2D> texture, float tilingFactor = 1.0f,  const glm::vec4& tintColor = glm::vec4(1.0f));static void DrawRotatedQuad(const glm::vec3& position, const glm::vec2& size, float rotation,const Ref<Texture2D> texture, float tilingFactor = 1.0f, const glm::vec4& tintColor = glm::vec4(1.0f));};
}

Renderer2D.cpp:  

#include "ytpch.h"
#include "Renderer2D.h"
#include"VertexArray.h"
#include"Shader.h"
//#include "Platform/OpenGL/OpenGLShader.h"
#include <glm/gtc/matrix_transform.hpp>
#include "RenderCommand.h"
namespace YOTO {struct  Renderer2DStorage {Ref<VertexArray> QuadVertexArray;//Ref<Shader> FlatColorShader;Ref<Shader> TextureShader;Ref<Texture2D> WhiteTexture;};static Renderer2DStorage* s_Data;void Renderer2D::Init(){YT_PROFILE_FUNCTION();s_Data = new  Renderer2DStorage();s_Data->QuadVertexArray = VertexArray::Create();float squareVertices[5 * 4] = {-0.5f,-0.5f,0.0f,0.0f,0.0f,0.5f,-0.5f,0.0f,1.0f,0.0f,0.5f,0.5f,0.0f,1.0f,1.0f,-0.5f,0.5f,0.0f,0.0f,1.0f,};Ref<VertexBuffer> squareVB;squareVB.reset(VertexBuffer::Create(squareVertices, sizeof(squareVertices)));squareVB->SetLayout({{ShaderDataType::Float3,"a_Position"},{ShaderDataType::Float2,"a_TexCoord"}});s_Data->QuadVertexArray->AddVertexBuffer(squareVB);uint32_t squareIndices[6] = { 0,1,2,2,3,0 };Ref<IndexBuffer> squareIB;squareIB.reset((IndexBuffer::Create(squareIndices, sizeof(squareIndices) / sizeof(uint32_t))));s_Data->QuadVertexArray->AddIndexBuffer(squareIB);s_Data->WhiteTexture = Texture2D::Create(1, 1);uint32_t whiteTextureData = 0xffffffff;s_Data->WhiteTexture->SetData(&whiteTextureData,sizeof(uint32_t));//s_Data->FlatColorShader =Shader::Create("assets/shaders/FlatColor.glsl");s_Data->TextureShader= Shader::Create("assets/shaders/Texture.glsl");s_Data->TextureShader->Bind();s_Data->TextureShader->SetInt("u_Texture", 0);}void Renderer2D::ShutDown(){YT_PROFILE_FUNCTION();delete s_Data;}void Renderer2D::BeginScene(const OrthographicCamera& camera){YT_PROFILE_FUNCTION();/*s_Data->FlatColorShader->Bind();s_Data->FlatColorShader->SetMat4("u_ViewProjection",camera.GetViewProjectionMatrix());*/s_Data->TextureShader->Bind();s_Data->TextureShader->SetMat4("u_ViewProjection", camera.GetViewProjectionMatrix());}void Renderer2D::EndScene(){YT_PROFILE_FUNCTION();}void Renderer2D::DrawQuad(const glm::vec2& position, const glm::vec2& size, const glm::vec4& color){DrawQuad({ position.x,position.y,0.0f }, size, color);}void Renderer2D::DrawQuad(const glm::vec3& position, const glm::vec2& size, const glm::vec4& color){YT_PROFILE_FUNCTION();//s_Data->FlatColorShader->Bind();//s_Data->FlatColorShader->SetFloat4("u_Color", color);//s_Data->TextureShader->Bind();s_Data->TextureShader->SetFloat4("u_Color", color);s_Data->TextureShader->SetFloat("m_TilingFactor", 1.0f);s_Data->WhiteTexture->Bind();glm::mat4 transform = glm::translate(glm::mat4(1.0f), position) /**rotation*/ * glm::scale(glm::mat4(1.0f), {size.x,size.y,1.0f});s_Data->TextureShader->SetMat4("u_Transform", transform);s_Data->QuadVertexArray->Bind();RenderCommand::DrawIndexed(s_Data->QuadVertexArray);}void Renderer2D::DrawQuad(const glm::vec2& position, const glm::vec2& size, const Ref<Texture2D> texture,  float tilingFactor, const glm::vec4& tintColor){DrawQuad({ position.x,position.y,0.0f }, size, texture, tilingFactor, tintColor);}void Renderer2D::DrawQuad(const glm::vec3& position, const glm::vec2& size, const Ref<Texture2D> texture, float tilingFactor, const glm::vec4& tintColor){YT_PROFILE_FUNCTION();//s_Data->TextureShader->Bind();s_Data->TextureShader->SetFloat4("u_Color", tintColor);s_Data->TextureShader->SetFloat("m_TilingFactor",tilingFactor);texture->Bind();glm::mat4 transform = glm::translate(glm::mat4(1.0f), position) /**rotation*/ * glm::scale(glm::mat4(1.0f), { size.x,size.y,1.0f });s_Data->TextureShader->SetMat4("u_Transform", transform);s_Data->QuadVertexArray->Bind();RenderCommand::DrawIndexed(s_Data->QuadVertexArray);}void Renderer2D::DrawRotatedQuad(const glm::vec2& position, const glm::vec2& size, float rotation, const glm::vec4& color){DrawRotatedQuad({ position.x,position.y,0.0f }, size, rotation,color);}void Renderer2D::DrawRotatedQuad(const glm::vec3& position, const glm::vec2& size, float rotation, const glm::vec4& color){YT_PROFILE_FUNCTION();s_Data->TextureShader->SetFloat4("u_Color", color);s_Data->TextureShader->SetFloat("m_TilingFactor", 1.0f);s_Data->WhiteTexture->Bind();glm::mat4 transform = glm::translate(glm::mat4(1.0f), position) * glm::rotate(glm::mat4(1.0f), rotation, {0.0f,0.0f,1.0f}) * glm::scale(glm::mat4(1.0f), { size.x,size.y,1.0f });s_Data->TextureShader->SetMat4("u_Transform", transform);s_Data->QuadVertexArray->Bind();RenderCommand::DrawIndexed(s_Data->QuadVertexArray);}void Renderer2D::DrawRotatedQuad(const glm::vec2& position, const glm::vec2& size, float rotation, const Ref<Texture2D> texture, float tilingFactor, const glm::vec4& tintColor){DrawRotatedQuad({ position.x,position.y,0.0f }, size, rotation, texture, tilingFactor, tintColor);}void Renderer2D::DrawRotatedQuad(const glm::vec3& position, const glm::vec2& size, float rotation, const Ref<Texture2D> texture, float tilingFactor, const glm::vec4& tintColor){YT_PROFILE_FUNCTION();//s_Data->TextureShader->Bind();s_Data->TextureShader->SetFloat4("u_Color", tintColor);s_Data->TextureShader->SetFloat("m_TilingFactor", tilingFactor);texture->Bind();glm::mat4 transform = glm::translate(glm::mat4(1.0f), position) * glm::rotate(glm::mat4(1.0f), rotation, { 0.0f,0.0f,1.0f }) * glm::scale(glm::mat4(1.0f), { size.x,size.y,1.0f });s_Data->TextureShader->SetMat4("u_Transform", transform);s_Data->QuadVertexArray->Bind();RenderCommand::DrawIndexed(s_Data->QuadVertexArray);}
}

OpenGLShader.h:添加SetFloat（父类Shader.h也要添加）：

	void OpenGLShader::SetFloat(const std::string& name, float value){YT_PROFILE_FUNCTION();UploadUniformFloat(name, value);}

 修改测试：

Texture.glsl:

		#type vertex#version 330 corelayout(location = 0) in vec3 a_Position;layout(location = 1) in vec2 a_TexCoord;uniform mat4 u_ViewProjection;uniform mat4 u_Transform;out vec2 v_TexCoord;out vec3 v_Position;void main(){v_TexCoord=a_TexCoord;v_Position=a_Position;gl_Position =u_ViewProjection*u_Transform*vec4( a_Position,1.0);}#type fragment#version 330 corelayout(location = 0) out vec4 color;in vec3 v_Position;in vec2 v_TexCoord;uniform vec4 u_Color ;uniform float m_TilingFactor;uniform sampler2D u_Texture ;void main(){color = texture(u_Texture, v_TexCoord*m_TilingFactor)*u_Color;	}

Sandbox2D.cpp: 

#include "Sandbox2D.h"
#include <imgui/imgui.h>
#include <glm/gtc/matrix_transform.hpp>
//#include <Platform/OpenGL/OpenGLShader.h>
#include <glm/gtc/type_ptr.hpp>
#include<vector>
#include<chrono>
template<typename Fn>
class Timer {
public:Timer(const char* name, Fn&&func):m_Name(name),m_Func(func),m_Stopped(false){m_StartTimepoint = std::chrono::high_resolution_clock::now();}~Timer() {if (!m_Stopped) {Stop();}}void Stop() {auto endTimepoint= std::chrono::high_resolution_clock::now();long long start = std::chrono::time_point_cast<std::chrono::microseconds>(m_StartTimepoint).time_since_epoch().count();long long end = std::chrono::time_point_cast<std::chrono::microseconds>(endTimepoint).time_since_epoch().count();m_Stopped = true;float duration = (end - start)*0.001f;m_Func({m_Name,duration});//std::cout << "Timer:"<< m_Name << "时差：" << duration << "ms" << std::endl;}
private:const char* m_Name;std::chrono::time_point<std::chrono::steady_clock>m_StartTimepoint;bool m_Stopped;Fn m_Func;
};
//未找到匹配的重载：auto的问题，改回原来的类型就好了
#define PROFILE_SCOPE(name) Timer timer##__LINE__(name,[&](ProfileResult profileResult) {m_ProfileResults.push_back(profileResult);})
Sandbox2D::Sandbox2D()
:Layer("Sandbox2D"), m_CameraController(1280.0f / 720.0f, true) 
{
}
void Sandbox2D::OnAttach()
{YT_PROFILE_FUNCTION();m_CheckerboardTexture = YOTO::Texture2D::Create("assets/textures/Checkerboard.png");}
void Sandbox2D::OnDetach()
{YT_PROFILE_FUNCTION();
}void Sandbox2D::OnUpdate(YOTO::Timestep ts)
{YT_PROFILE_FUNCTION();//updatem_CameraController.OnUpdate(ts);{YT_PROFILE_SCOPE("Sandbox2D::Renderer Prep");//RenderYOTO::RenderCommand::SetClearColor({ 0.2f, 0.2f, 0.2f, 1.0f });YOTO::RenderCommand::Clear();}{YT_PROFILE_SCOPE("Sandbox2D::Renderer Draw");YOTO::Renderer2D::BeginScene(m_CameraController.GetCamera());{static glm::mat4 scale = glm::scale(glm::mat4(1.0f), glm::vec3(0.1f));glm::vec4  redColor(0.8f, 0.3f, 0.3f, 1.0f);glm::vec4  blueColor(0.2f, 0.3f, 0.8f, 1.0f);/*std::dynamic_pointer_cast<YOTO::OpenGLShader>(m_FlatColorShader)->Bind();std::dynamic_pointer_cast<YOTO::OpenGLShader>(m_FlatColorShader)->UploadUniformFloat4("u_Color", m_SquareColor);YOTO::Renderer::Submit(m_FlatColorShader, m_SquareVA, glm::scale(glm::mat4(1.0f), glm::vec3(1.5f)));*/YOTO::Renderer2D::DrawRotatedQuad({ -1.0f,0.0f }, { 0.8f,0.8f }, glm::radians(45.0f),{ 0.8f,0.2f,0.3f,1.0f });YOTO::Renderer2D::DrawQuad({ 0.5f,-0.5f }, { 0.5f,0.75f }, { 0.2f,0.3f,0.8f,1.0f });YOTO::Renderer2D::DrawQuad({ 0.0f,0.0f,-0.1f }, { 10.0f,10.0f }, m_CheckerboardTexture,10.0f,glm::vec4(1.0f,0.9f,0.9f,1.0f));YOTO::Renderer2D::EndScene();}}}
void Sandbox2D::OnImGuiRender()
{YT_PROFILE_FUNCTION();ImGui::Begin("Setting");ImGui::ColorEdit4("Color", glm::value_ptr(m_SquareColor));for (auto& res : m_ProfileResults) {char lable[50];strcpy(lable, "%.3fms  ");strcat(lable, res.Name);ImGui::Text(lable, res.Time);}m_ProfileResults.clear();ImGui::End();
}void Sandbox2D::OnEvent(YOTO::Event& e)
{YT_PROFILE_FUNCTION();m_CameraController.OnEvent(e);
}