init

2023-07-16 10:08:20 +02:00 · 2023-07-16 10:08:20 +02:00 · 00d6f03442
commit 00d6f03442
parent ef8a42de8f
12 changed files with 617 additions and 0 deletions
--- a/Engine/Engine.sln
+++ b/Engine/Engine.sln
@ -0,0 +1,31 @@
+
+Microsoft Visual Studio Solution File, Format Version 12.00
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+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "Engine", "Engine\Engine.vcxproj", "{3BEE640E-71B2-4D18-9D8C-8B6B85CAE21A}"
+EndProject
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+		Debug|x86 = Debug|x86
+		Release|x64 = Release|x64
+		Release|x86 = Release|x86
+	EndGlobalSection
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+		{3BEE640E-71B2-4D18-9D8C-8B6B85CAE21A}.Release|x64.ActiveCfg = Release|x64
+		{3BEE640E-71B2-4D18-9D8C-8B6B85CAE21A}.Release|x64.Build.0 = Release|x64
+		{3BEE640E-71B2-4D18-9D8C-8B6B85CAE21A}.Release|x86.ActiveCfg = Release|Win32
+		{3BEE640E-71B2-4D18-9D8C-8B6B85CAE21A}.Release|x86.Build.0 = Release|Win32
+	EndGlobalSection
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+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {25B3C080-617C-4BEA-9F36-818FB47E657F}
+	EndGlobalSection
+EndGlobal
--- a/Engine/Engine/Engine.vcxproj
+++ b/Engine/Engine/Engine.vcxproj
@ -0,0 +1,158 @@
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+    <LibraryPath>C:\Users\Daniel\Documents\SelfmadeProgramme\libraries\glfw\lib;$(LibraryPath)</LibraryPath>
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+      <ConformanceMode>true</ConformanceMode>
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+      <PreprocessorDefinitions>WIN32;NDEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <ConformanceMode>true</ConformanceMode>
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+    <Link>
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+    <ClCompile>
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+      <PreprocessorDefinitions>_DEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <ConformanceMode>true</ConformanceMode>
+    </ClCompile>
+    <Link>
+      <SubSystem>Console</SubSystem>
+      <GenerateDebugInformation>true</GenerateDebugInformation>
+      <AdditionalDependencies>glfw3.lib;opengl32.lib;%(AdditionalDependencies)</AdditionalDependencies>
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+      <PreprocessorDefinitions>NDEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <ConformanceMode>true</ConformanceMode>
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+      <AdditionalDependencies>glfw3.lib;opengl32.lib;%(AdditionalDependencies)</AdditionalDependencies>
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+    <ClCompile Include="main.cpp" />
+    <ClCompile Include="Shaders\Shader.cpp" />
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+    <None Include="Shaders\default\default.frag" />
+    <None Include="Shaders\default\default.vert" />
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+    <ClInclude Include="Exceptions\Shaders\CreateProgramException.h" />
+    <ClInclude Include="Exceptions\Shaders\ShaderCompileException.h" />
+    <ClInclude Include="Shaders\Enums.h" />
+    <ClInclude Include="Shaders\Shader.h" />
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--- a/Engine/Engine/Engine.vcxproj.filters
+++ b/Engine/Engine/Engine.vcxproj.filters
@ -0,0 +1,51 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <ItemGroup>
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+    <Filter Include="Header Files">
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+      <Extensions>h;hh;hpp;hxx;h++;hm;inl;inc;ipp;xsd</Extensions>
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+      <Extensions>rc;ico;cur;bmp;dlg;rc2;rct;bin;rgs;gif;jpg;jpeg;jpe;resx;tiff;tif;png;wav;mfcribbon-ms</Extensions>
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+    <ClCompile Include="..\..\..\libraries\glad\src\glad.c">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="main.cpp">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="Shaders\Shader.cpp">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+  </ItemGroup>
+  <ItemGroup>
+    <ClInclude Include="Shaders\Shader.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
+    <ClInclude Include="Exceptions\IOException.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
+    <ClInclude Include="Exceptions\Shaders\ShaderCompileException.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
+    <ClInclude Include="Shaders\Enums.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
+    <ClInclude Include="Exceptions\Shaders\CreateProgramException.h">
+      <Filter>Header Files</Filter>
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+      <Filter>Resource Files</Filter>
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+    <None Include="Shaders\default\default.frag" />
+  </ItemGroup>
+</Project>
--- a/Engine/Engine/exceptions/IOException.h
+++ b/Engine/Engine/exceptions/IOException.h
@ -0,0 +1,22 @@
+#pragma once
+#include <stdexcept>
+
+namespace Nebulix 
+{
+	/// <summary>
+	/// This exception will be thrown if there is an error to do with its IO. For example opening the file
+	/// </summary>
+	class IOException : public std::runtime_error
+	{
+	public:
+		using runtime_error::runtime_error;
+
+		IOException() : runtime_error{ "ERROR::FILE::IO" } {}
+		/// <summary>
+		/// Overrides the default error message
+		/// </summary>
+		IOException(std::string message) : runtime_error{ message } {}
+
+	private:
+	};
+}
--- a/Engine/Engine/exceptions/shaders/CreateProgramException.h
+++ b/Engine/Engine/exceptions/shaders/CreateProgramException.h
@ -0,0 +1,15 @@
+#pragma once
+#include <stdexcept>
+
+namespace Nebulix
+{
+	class CreateProgramException : public std::runtime_error
+	{
+	public:
+		using runtime_error::runtime_error;
+
+		CreateProgramException(std::string &message) : runtime_error{ "ERROR::SHADER::CREATE_PROGRAM\n" + message } {}
+
+	private:
+	};
+}
--- a/Engine/Engine/exceptions/shaders/ShaderCompileException.h
+++ b/Engine/Engine/exceptions/shaders/ShaderCompileException.h
@ -0,0 +1,39 @@
+#pragma once
+#include <stdexcept>
+#include "../../shaders/Enums.h"
+
+namespace Nebulix
+{
+	class ShaderCompileException: public std::exception
+	{
+	public:
+		ShaderCompileException() = delete;
+
+		ShaderCompileException(Nebulix::ShaderType shaderType, std::string compileMessage)
+		{
+			std::string shader;
+
+			switch (shaderType)
+			{
+			case Nebulix::ShaderType::Vertex:
+				shader = std::string{"VERTEX"};
+				break;
+			case Nebulix::ShaderType::Fragment:
+				shader = std::string{ "FRAGMENT" };
+				break;
+			default:
+				shader = std::string{ "UNKNOWN" };
+				break;
+			}
+			_message = "ERROR::SHADER::" + shader + "::COMPILATION_FAILED\n Error message -> " + compileMessage;
+		}
+
+		virtual const char* what() const override
+		{
+			return _message.c_str();
+		}
+
+	private:
+		std::string _message;
+	};
+}
--- a/Engine/Engine/main.cpp
+++ b/Engine/Engine/main.cpp
@ -0,0 +1,131 @@
+#include <glad/glad.h>
+#include <GLFW/glfw3.h>
+#include <iostream>
+#include <fstream>
+#include <string>
+
+#include "shaders/Shader.h"
+
+// Continue: https://learnopengl.com/Getting-started/Shaders
+// Chapter: Not yet started
+//
+
+
+// 
+// HOW TO redirect error output to file
+// Maybe it is possible to redirect to another stream object which adds infos like thread id/time etc.?
+// 
+// std::ofstream errorFile("error.log");
+// std::streambuf* originalCerrBuffer = std::cerr.rdbuf();  // Save original buffer
+// Redirect cerr to the error file
+// std::cerr.rdbuf(errorFile.rdbuf());
+
+#define WINDOW_WIDTH 800
+#define WINDOW_HEIGHT 600
+
+
+void OnWindowResize(GLFWwindow* window, int width, int height)
+{
+	glViewport(0, 0, width, height);
+}
+
+void ProcessInput(GLFWwindow* window)
+{
+	if (glfwGetKey(window, GLFW_KEY_ESCAPE) == GLFW_PRESS)
+		glfwSetWindowShouldClose(window, true);
+}
+
+int main()
+{
+	glfwInit();
+	glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
+	glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
+	glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
+
+	GLFWwindow* window = glfwCreateWindow(WINDOW_WIDTH, WINDOW_HEIGHT, "Henlo worl", nullptr, nullptr);
+
+	if (window == nullptr)
+	{
+		std::cerr << "Failed to create GLFW window";
+		glfwTerminate();
+
+		return -1;
+	}
+
+	glfwMakeContextCurrent(window);
+
+	if (!gladLoadGLLoader((GLADloadproc)glfwGetProcAddress))
+	{
+		std::cerr << "Failed to initialise GLAD";
+		return -1;
+	}
+
+	OnWindowResize(window, WINDOW_WIDTH, WINDOW_HEIGHT);
+	glfwSetFramebufferSizeCallback(window, OnWindowResize);
+
+	GLfloat vertices[] = {
+	  0.5f,  0.5f, 0.0f,  // top right
+	  0.5f, -0.5f, 0.0f,  // bottom right
+	 -0.5f, -0.5f, 0.0f,  // bottom left
+	 -0.5f,  0.5f, 0.0f   // top left 
+	};
+	GLuint indices[]{
+		0, 1, 3,
+		1, 2, 3
+	};
+
+	GLuint vertexBufferObject, elementBufferObject, vertexArrayObject;
+	glGenVertexArrays(1, &vertexArrayObject);
+	glGenBuffers(1, &vertexBufferObject);
+	glGenBuffers(1, &elementBufferObject);
+
+	glBindVertexArray(vertexArrayObject);
+
+	glBindBuffer(GL_ARRAY_BUFFER, vertexBufferObject);
+	glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW);
+
+	glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, elementBufferObject);
+	glBufferData(GL_ELEMENT_ARRAY_BUFFER, sizeof(indices), indices, GL_STATIC_DRAW);
+
+	glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 3 * sizeof(float), (void*)0);
+	glEnableVertexAttribArray(0);
+	// I could unbind the VAO, but this is usually not needed because when creating a new VAO we need to bind that to change it anyway, so there shouldn't be a problem
+
+	std::string vertexPath = "shaders/default/default.vert";
+	std::string fragmentPath = "shaders/default/default.frag";
+
+	std::unique_ptr<Nebulix::Shader> shader;
+	try
+	{
+		shader = std::make_unique<Nebulix::Shader>(vertexPath, fragmentPath);
+	}
+	catch (const std::exception &e)
+	{
+		std::cerr << e.what();
+		return -1;
+	}
+	glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
+	
+	// main loop
+	while(!glfwWindowShouldClose(window))
+	{
+		glClearColor(0.2f, 0.3f, 0.3f, 1.0f);
+		glClear(GL_COLOR_BUFFER_BIT);
+
+		ProcessInput(window);
+
+		shader->Use();
+		glBindVertexArray(vertexArrayObject);
+		glDrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_INT, 0);
+
+		glfwSwapBuffers(window);
+		glfwPollEvents();
+	}
+
+	// optional, as we are at the end of the program.
+	glDeleteVertexArrays(1, &vertexArrayObject);
+	glDeleteBuffers(1, &elementBufferObject);
+
+	glfwTerminate();
+	return 0;
+}
--- a/Engine/Engine/shaders/Enums.h
+++ b/Engine/Engine/shaders/Enums.h
@ -0,0 +1,12 @@
+#pragma once
+
+namespace Nebulix
+{
+	enum class ShaderType
+	{
+		Vertex,
+		Fragment,
+		Unknown
+		// TODO: Add compute etc in future
+	};
+}
--- a/Engine/Engine/shaders/Shader.cpp
+++ b/Engine/Engine/shaders/Shader.cpp
@ -0,0 +1,98 @@
+#include <sstream>
+#include <fstream>
+#include "Shader.h"
+
+#include "../Exceptions/IOException.h"
+#include "../Exceptions/Shaders/ShaderCompileException.h"
+#include "../exceptions/shaders/CreateProgramException.h"
+
+namespace Nebulix 
+{
+
+	const char* vertexShaderSourceCode = "#version 330 core\n"
+		"layout (location = 0) in vec3 aPos;\n"
+		"void main()\n"
+		"{\n"
+		"   gl_Position = vec4(aPos.x, aPos.y, aPos.z, 1.0);\n"
+		"}\0";
+	const char* fragmentShaderSourceCode = "#version 330 core\n"
+		"out vec4 FragColor;\n"
+		"void main()\n"
+		"{\n"
+		"   FragColor = vec4(1.0f, 0.5f, 0.2f, 1.0f);\n"
+		"}\n\0";
+
+	Shader::Shader(std::string& vertexShaderfile, std::string& fragmentShaderfile): _vertexFile{vertexShaderfile}, _fragmentFile{fragmentShaderfile}
+	{
+		std::ifstream vertexShaderSource(vertexShaderfile), fragmentShaderSource(fragmentShaderfile);
+		GLuint vertexShader = 0, fragmentShader = 0;
+
+		CompileShadercode(vertexShaderSource, vertexShader, ShaderType::Vertex);
+		CompileShadercode(fragmentShaderSource, fragmentShader, ShaderType::Fragment);
+
+		CreateProgram(vertexShader, fragmentShader);
+	}
+
+	void Shader::CompileShadercode(std::ifstream& shaderSource, GLuint& shaderObject, ShaderType type)
+	{
+		if (!shaderSource.is_open())
+		{
+			throw IOException("ERROR::SHADER::CANNOT_OPEN_FILE");
+		}
+
+		const char* shader;
+		
+		shaderSource.exceptions(std::ifstream::failbit | std::ifstream::badbit);
+		try
+		{
+			std::stringstream sourceCode;
+			sourceCode << shaderSource.rdbuf();
+			shaderSource.close();
+			std::string code = sourceCode.str();
+			shader = code.c_str();
+		}
+		catch (const std::exception&)
+		{
+			throw Nebulix::IOException("ERROR::SHADER::READ_FILE");
+		}
+		
+
+		if (type == ShaderType::Vertex)
+			shaderObject = glCreateShader(GL_VERTEX_SHADER);
+		else if (type == ShaderType::Fragment)
+			shaderObject = glCreateShader(GL_FRAGMENT_SHADER);
+		else
+			throw std::runtime_error("ERROR::SHADER::TYPE \nCannot create shader program with the given shader type '" + std::to_string((int)type) + "'");
+
+		glShaderSource(shaderObject, 1, &shader, NULL);
+		glCompileShader(shaderObject);
+
+		int success;
+		char infoLog[512];
+		glGetShaderiv(shaderObject, GL_COMPILE_STATUS, &success);
+		if (!success)
+		{
+			glGetShaderInfoLog(shaderObject, 512, NULL, infoLog);
+			throw Nebulix::ShaderCompileException(type, infoLog);
+		}
+	}
+
+	void Shader::CreateProgram(GLuint& vertexShader, GLuint& fragmentShader)
+	{
+		shaderId = glCreateProgram();
+		glAttachShader(shaderId, vertexShader);
+		glAttachShader(shaderId, fragmentShader);
+		glLinkProgram(shaderId);
+
+		int success;
+		char infoLog[512];
+		glGetProgramiv(shaderId, GL_LINK_STATUS, &success);
+		if (!success) {
+			glGetProgramInfoLog(shaderId, 512, NULL, infoLog);
+			throw Nebulix::CreateProgramException(infoLog);
+		}
+
+		glDeleteShader(vertexShader);
+		glDeleteShader(fragmentShader);
+	}
+}
--- a/Engine/Engine/shaders/Shader.h
+++ b/Engine/Engine/shaders/Shader.h
@ -0,0 +1,46 @@
+#pragma once
+#include <fstream>
+#include <vector>
+#include <string>
+#include <glad/glad.h>
+#include "Enums.h"
+
+
+namespace Nebulix 
+{
+	class Shader
+	{
+	public:
+		Shader() = delete;
+		Shader(std::string& vertexShaderfile, std::string& fragmentShaderfile);
+		~Shader() 
+		{
+			glDeleteProgram(shaderId);
+		}
+
+		/// <summary>
+		/// To actually use and activate the shader, call this.
+		/// </summary>
+		void Use() { glUseProgram(shaderId); }
+
+		void setBool(const std::string& name, bool value) const 
+		{
+			glUniform1i(glGetUniformLocation(shaderId, name.c_str()), (int)value);
+		}
+		void setInt(const std::string& name, int value) const
+		{
+			glUniform1i(glGetUniformLocation(shaderId, name.c_str()), value);
+		}
+		void setFloat(const std::string& name, float value) const
+		{
+			glUniform1f(glGetUniformLocation(shaderId, name.c_str()), value);
+		}
+
+	private:
+		std::string &_vertexFile, &_fragmentFile;
+		GLuint shaderId;
+
+		void CompileShadercode(std::ifstream& shaderSource, GLuint& shaderId, ShaderType type);
+		void CreateProgram(GLuint& vertexShader, GLuint& fragmentShader);
+	};
+}
--- a/Engine/Engine/shaders/default/default.frag
+++ b/Engine/Engine/shaders/default/default.frag
@ -0,0 +1,7 @@
+#version 330 core
+out vec4 FragColor;
+
+void main()
+{
+    FragColor = vec4(1.0f, 0.5f, 0.2f, 1.0f);
+} 
--- a/Engine/Engine/shaders/default/default.vert
+++ b/Engine/Engine/shaders/default/default.vert
@ -0,0 +1,7 @@
+#version 330 core
+layout (location = 0) in vec3 aPos;
+
+void main()
+{
+	gl_Position = vec4(aPos.x, aPos.y, aPos.z, 1.0);
+}