Added primitives

CMakeLists.txt

@@ -2,6 +2,8 @@ cmake_minimum_required(VERSION 3.7)
 
 project("ComplexPlotting")
 
+set(CMAKE_CXX_STANDARD 17)
+
 find_package(OpenGL REQUIRED)
 find_package(glfw3 REQUIRED)
 

src/CMakeLists.txt

@@ -1,7 +1,7 @@
 
 add_executable(ComplexPlotting
 	"main.cpp"
-)
+ "ShaderProgram.hpp")
 
 file(GLOB vendor_SRC
 	${CMAKE_SOURCE_DIR}/vendor/src/*.c
@@ -13,9 +13,14 @@ target_sources(ComplexPlotting PRIVATE
 
 target_include_directories(ComplexPlotting PRIVATE
 	glfw
+	./primitives
 	${CMAKE_SOURCE_DIR}/vendor/include
 )
 
 target_link_libraries(ComplexPlotting
 	glfw
+)
+
+add_custom_command(TARGET ComplexPlotting POST_BUILD
+	COMMAND ${CMAKE_COMMAND} -E copy_directory ${CMAKE_SOURCE_DIR}/src/shaders $<TARGET_FILE_DIR:ComplexPlotting>/shaders
 )

src/ShaderProgram.hpp

@@ -0,0 +1,95 @@
+#pragma once
+
+#include <glad/glad.h>
+
+#include <fstream>
+#include <streambuf>
+
+class ShaderProgram
+{
+public:
+	ShaderProgram() = default;
+
+	~ShaderProgram()
+	{
+		glDeleteShader(fragmentShader_id);
+		glDeleteShader(vertexShader_id);
+	}
+
+	std::string VertexShader, FragmentShader;
+
+	int Build(char** error)
+	{
+		int success;
+
+		// Vertex Shader initialization
+		if (VertexShader != "")
+		{
+			vertexShader_id = glCreateShader(GL_VERTEX_SHADER);
+			char* source = new char;
+			LoadFile(VertexShader, &source);
+			glShaderSource(vertexShader_id, 1, &source, NULL);
+			glCompileShader(vertexShader_id);
+
+			glGetShaderiv(vertexShader_id, GL_COMPILE_STATUS, &success);
+			if (!success)
+			{
+				glGetShaderInfoLog(vertexShader_id, 512, NULL, *error);
+				return success;
+			}
+		}
+
+		// Fragment Shader initialization
+		if (FragmentShader != "")
+		{
+			fragmentShader_id = glCreateShader(GL_FRAGMENT_SHADER);
+			char* source = new char;
+			LoadFile(FragmentShader, &source);
+			glShaderSource(fragmentShader_id, 1, &source, NULL);
+			glCompileShader(fragmentShader_id);
+
+			glGetShaderiv(fragmentShader_id, GL_COMPILE_STATUS, &success);
+			if (!success)
+			{
+				glGetShaderInfoLog(fragmentShader_id, 512, NULL, *error);
+				return success;
+			}
+		}
+
+		// Link shaders
+		program_id = glCreateProgram();
+		glAttachShader(program_id, vertexShader_id);
+		glAttachShader(program_id, fragmentShader_id);
+		glLinkProgram(program_id);
+
+		glGetProgramiv(program_id, GL_LINK_STATUS, &success);
+		if (!success)
+		{
+			glGetProgramInfoLog(program_id, 512, NULL, *error);
+			return success;
+		}
+
+		return 1;
+	}
+
+	void Use()
+	{
+		glUseProgram(program_id);
+	}
+
+private:
+	void LoadFile(std::string path, char** source)
+	{
+		std::ifstream file(path);
+		std::string shader(
+			(std::istreambuf_iterator<char>(file)),
+			std::istreambuf_iterator<char>()
+		);
+		size_t s = shader.size();
+		*source = (char*)realloc(*source, s + sizeof(char));
+		memcpy_s(*source, s, shader.c_str(), s);
+		(*source)[s] = '\0';
+	}
+
+	unsigned int vertexShader_id, fragmentShader_id, program_id;
+};

src/main.cpp

@@ -3,6 +3,10 @@
 
 #include <iostream>
 
+#include "ShaderProgram.hpp"
+#include "Triangle.hpp"
+#include "Quad.hpp"
+
 void LogGLFWerror()
 {
 	const char* error = new const char;
@@ -42,6 +46,32 @@ int main(int argc, char** argv)
 	glViewport(0, 0, 800, 800);
 	glfwSetFramebufferSizeCallback(window, FramebufferSizeCallback);
 
+	// Create Shader Program
+	ShaderProgram program;
+	program.VertexShader = "shaders/triangle.vert";
+	program.FragmentShader = "shaders/triangle.frag";
+
+	char* error = new char;
+	if (!program.Build(&error))
+	{
+		std::cout << error << std::endl;
+		return -1;
+	}
+
+	// Make triangle
+	Triangle t(
+		{ -0.5f, -0.5f, 0.f },
+		{ 0.5f, -0.5f, 0.f },
+		{ 0.f, 0.5, 0.f }
+	);
+
+	Quad q(
+		{ -0.5f, 0.5f, 0.0f },
+		{ 0.5f, 0.5f, 0.0f },
+		{ 0.5f, -0.5f, 0.0f },
+		{ -0.5f, -0.5f, 0.0f }
+	);
+
 	while (!glfwWindowShouldClose(window))
 	{
 		glfwPollEvents();
@@ -49,8 +79,15 @@ int main(int argc, char** argv)
 		glClearColor(0.4f, 0.1f, 0.5f, 1.0f);
 		glClear(GL_COLOR_BUFFER_BIT);
 
+		program.Use();
+		q.Draw();
+
 		glfwSwapBuffers(window);
 	}
 
+	glfwDestroyWindow(window);
+
+	glfwTerminate();
+
 	return 0;
 }

src/primitives/IDrawable.hpp

@@ -0,0 +1,18 @@
+#pragma once
+
+#include <glad/glad.h>
+
+class IDrawable
+{
+public:
+	virtual void Draw() = 0;
+
+protected:
+	IDrawable()
+	{
+		glCreateVertexArrays(1, &VAO);
+		glCreateBuffers(1, &VBO);
+	}
+
+	unsigned int VBO, VAO;
+};

src/primitives/Quad.hpp

@@ -0,0 +1,50 @@
+#pragma once
+#include <memory>
+
+#include "IDrawable.hpp"
+#include "util.hpp"
+
+class Quad :
+	public IDrawable
+{
+public:
+	Quad(Vec3 topLeft, Vec3 topRight, Vec3 botRight, Vec3 botLeft)
+	{
+		memcpy_s(vertices + 0, sizeof(vertices), &topLeft, sizeof(topLeft));
+		memcpy_s(vertices + 3, sizeof(vertices), &topRight, sizeof(topRight));
+		memcpy_s(vertices + 6, sizeof(vertices), &botRight, sizeof(botRight));
+		memcpy_s(vertices + 9, sizeof(vertices), &botLeft, sizeof(botLeft));
+
+		glGenBuffers(1, &EBO);
+
+		glBindVertexArray(VAO);
+
+		glBindBuffer(GL_ARRAY_BUFFER, VBO);
+		glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW);
+
+		glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, EBO);
+		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);
+
+		glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
+		glBindBuffer(GL_ARRAY_BUFFER, 0);
+		glBindVertexArray(0);
+	}
+
+	void Draw() override
+	{
+		glBindVertexArray(VAO);
+		glDrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_INT, indices);
+		glBindVertexArray(0);
+	}
+
+private:
+	unsigned int EBO;
+	float vertices[3 * 4];
+	inline static unsigned int indices[6] = {
+		0, 1, 3,
+		1, 2, 3
+	};
+};

src/primitives/Triangle.hpp

@@ -0,0 +1,36 @@
+#include <memory>
+
+#include "IDrawable.hpp"
+#include "util.hpp"
+
+class Triangle : 
+	public IDrawable
+{
+public:
+	Triangle(Vec3 v1, Vec3 v2, Vec3 v3)
+	{
+		memcpy_s(vertices + 0, 9 * sizeof(float), &v1, 3 * sizeof(float));
+		memcpy_s(vertices + 3, 9 * sizeof(float), &v2, 3 * sizeof(float));
+		memcpy_s(vertices + 6, 9 * sizeof(float), &v3, 3 * sizeof(float));
+
+		glBindVertexArray(VAO);
+		glBindBuffer(GL_ARRAY_BUFFER, VBO);
+
+		glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW);
+		glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 3 * sizeof(float), (void*)0);
+		glEnableVertexAttribArray(0);
+
+		glBindBuffer(GL_ARRAY_BUFFER, 0);
+		glBindVertexArray(0);
+	}
+
+	void Draw() override 
+	{
+		glBindVertexArray(VAO);
+		glDrawArrays(GL_TRIANGLES, 0, 3);
+		glBindVertexArray(0);
+	}
+
+private:
+	float vertices[9];
+};

src/shaders/triangle.frag

@@ -0,0 +1,8 @@
+#version 460 core
+out vec4 FragColor;
+
+
+void main()
+{
+	FragColor = vec4(1.0f, 0.5f, 0.2f, 1.0f);
+}

src/shaders/triangle.vert

@@ -0,0 +1,7 @@
+#version 460 core
+layout (location = 0) in vec3 aPos;
+
+void main()
+{
+	gl_Position = vec4(aPos.x, aPos.y, aPos.z, 1.0);
+}

src/util.hpp

@@ -0,0 +1,6 @@
+#pragma once
+
+typedef struct
+{
+	float x, y, z;
+} Vec3;