07: Add basic boilerplate for batching

06-monogame/GUI/Content/Content.mgcb

@@ -25,6 +25,18 @@
 /processorParam:TextureFormat=Color
 /build:button-default-texture.png
 
+#begin button.png
+/importer:TextureImporter
+/processor:TextureProcessor
+/processorParam:ColorKeyColor=255,0,255,255
+/processorParam:ColorKeyEnabled=True
+/processorParam:GenerateMipmaps=False
+/processorParam:PremultiplyAlpha=True
+/processorParam:ResizeToPowerOfTwo=False
+/processorParam:MakeSquare=False
+/processorParam:TextureFormat=Color
+/build:button.png
+
 #begin Fonts/default.spritefont
 /importer:FontDescriptionImporter
 /processor:LocalizedFontProcessor

06-monogame/GUI/Game1.cs

@@ -29,8 +29,7 @@ public class Game1 : Game
         Scene.content = Content;
         
         mainScene = new Scene();
-        DrawableData drawableData = new DrawableData(null);
-        drawableData.scale = new Vector2(120.0f, 40.0f);
+        DrawableData drawableData = new DrawableData("button");
         drawableData.position = new Vector2(100.0f, 100.0f);
 
         void buttonOnClick(Button obj)
@@ -39,8 +38,6 @@ public class Game1 : Game
         }
 
         ButtonData buttonData = new ButtonData(buttonOnClick);
-        buttonData.bgColor = Color.Red;
-        buttonData.fgColor = Color.White;
         buttonData.text = "Click me!";
 
         Button  mainButton = new Button(drawableData, buttonData);

06-monogame/GUI/UI/Button.cs

@@ -12,14 +12,14 @@ public class ButtonData
     public Color bgColor;
     public Color fgColor;
 
-    public Color hoverBgColor;
-    public Color hoverFgColor;
+    public Color? hoverBgColor; 
+    public Color? hoverFgColor;
 
-    public Color pressedBgColor;
-    public Color pressedFgColor;
+    public Color? pressedBgColor;
+    public Color? pressedFgColor;
 
-    public Color idleBgColor;
-    public Color idleFgColor;
+    public Color idleBgColor = Color.Black;
+    public Color idleFgColor = Color.White;
     
     public bool isPressed = false;
     public bool isReleased = false;
@@ -31,6 +31,7 @@ public class ButtonData
     public string text = "";
     public Vector2 textPosition;
     public Vector2 textResolution;
+    public Vector2 textScale;
 
     public ButtonData(Action<Button>? onClick)
     {
@@ -61,9 +62,8 @@ public class Button : Drawable
         if (_buttonData.isPressed)
             return;
 
-        Console.WriteLine("I'm being pressed!");
-        _buttonData.bgColor = Color.Red;
-        _buttonData.fgColor = Color.Black;
+        _buttonData.bgColor = _buttonData.pressedBgColor ?? _buttonData.idleBgColor;
+        _buttonData.fgColor = _buttonData.pressedFgColor ?? _buttonData.idleFgColor;
 
         if (_buttonData.onClick is not null)
             _buttonData.onClick(this);
@@ -77,8 +77,8 @@ public class Button : Drawable
         if (!_buttonData.isPressed)
             return;
 
-        _buttonData.bgColor = Color.Yellow;
-        _buttonData.fgColor = Color.Red;
+        _buttonData.bgColor = _buttonData.hoverBgColor ?? _buttonData.idleBgColor;
+        _buttonData.fgColor = _buttonData.hoverFgColor ?? _buttonData.idleFgColor;
         
         _buttonData.isPressed = false;
         _buttonData.isReleased = true;
@@ -89,17 +89,16 @@ public class Button : Drawable
         if (_buttonData.isHovered)
             return;
         
-        Console.WriteLine("I'm being hovered!");
-        _buttonData.bgColor = Color.Yellow;
-        _buttonData.fgColor = Color.Red;
+        _buttonData.bgColor = _buttonData.hoverBgColor ?? _buttonData.idleBgColor;
+        _buttonData.fgColor = _buttonData.hoverFgColor ?? _buttonData.idleFgColor;
 
         _buttonData.isHovered = true;
     }
 
     void onIdle()
     {
-        _buttonData.bgColor = Color.Red;
-        _buttonData.fgColor = Color.Yellow;
+        _buttonData.bgColor = _buttonData.idleBgColor;
+        _buttonData.fgColor = _buttonData.idleFgColor;
         
         _buttonData.isPressed = false;
         _buttonData.isReleased = false;
@@ -141,7 +140,7 @@ public class Button : Drawable
         _buttonData.textResolution = buttonFont.MeasureString(_buttonData.text);
         
         // we want to center the text so 
-        Vector2 buttonCenter = (_drawableData.position + (_drawableData.scale / 2.0f));
+        Vector2 buttonCenter = (_drawableData.position + (Vector2.One / 2.0f));
         Vector2 textHalfResolution = _buttonData.textResolution / 2.0f;
 
         _buttonData.textPosition = buttonCenter - textHalfResolution;
@@ -153,10 +152,10 @@ public class Button : Drawable
             _drawableData.texture, 
             _drawableData.position, 
             null, 
-            _buttonData.bgColor, 
+            Color.White, 
             _drawableData.rotation,
             Vector2.Zero,
-            _drawableData.scale, 
+            _drawableData.scale,
             SpriteEffects.None, 
             0f
         );
@@ -168,7 +167,7 @@ public class Button : Drawable
             _buttonData.fgColor, 
             _drawableData.rotation,
             Vector2.Zero,
-            Vector2.One, 
+            _drawableData.scale, 
             SpriteEffects.None, 
             0f, 
             false

06-monogame/GUI/UI/Drawable.cs

@@ -9,14 +9,23 @@ public class DrawableData
 {
     public Texture2D texture;
     public Vector2 position = Vector2.Zero;
-    public Vector2 scale = Vector2.One;
+    private Vector2 scale_multiplier = Vector2.One;
+    public Vector2 scale
+    {
+        get { return scale_multiplier * new Vector2(texture.Width, texture.Height); }
+        set
+        {
+            scale_multiplier = value;
+        }
+    }
+    
     public float rotation = 0.0f;
     
-    public DrawableData(Texture2D? texture)
+    public DrawableData(string? texture)
     {
         if (texture is not null)
         {
-            this.texture = texture;
+            this.texture = Scene.content.Load<Texture2D>(texture);
             return;
         }
 

07-boilerplate/Makefile

@@ -0,0 +1,28 @@
+CC=g++
+CFLAGS=-std=c++20 `pkg-config --cflags glfw3 glew glm`
+LDFLAGS=`pkg-config --libs glfw3 glew glm`
+TARGET=boilerplate
+SDIR=src
+ADIR=assets
+ODIR=build
+
+SRC=$(shell find $(SDIR) -type f -name *.cpp) 
+OBJ=$(SRC:.cpp=.o)
+
+all: $(TARGET)
+
+.PHONY: default
+$(TARGET): $(OBJ) 
+	mkdir -p build 
+	cp -rf $(ADIR) $(ODIR)/$(ADIR)
+	$(CC) -o $(ODIR)/$@ $^ $(LDFLAGS)
+
+%.o: %.cpp
+	$(CC) $(CFLAGS) -o $@ -c $< 
+
+run: 
+	$(ODIR)/$(TARGET)
+
+.PHONY: clean 
+clean: 
+	rm -f $(ODIR)/$(TARGET) $(OBJ)

07-boilerplate/README.md

@@ -0,0 +1,3 @@
+# Boilerplate API
+
+Creating a boilerplate API to abstract away OpenGL

07-boilerplate/assets/shaders/default_fragment.glsl

@@ -0,0 +1,12 @@
+#version 330 core
+in vec4 _color; 
+in vec2 _texture_position; 
+in float _ctt;
+
+out vec4 color; 
+
+void main() {
+//    color = texture(sampler, _texture_position);
+    //color = vec4(1.0, 1.0, 1.0, 1.0);
+    color = _color;
+}

07-boilerplate/assets/shaders/default_vertex.glsl

@@ -0,0 +1,23 @@
+#version 330 core 
+
+layout (location = 0) in vec4 position; 
+layout (location = 1) in vec4 origin;
+layout (location = 2) in vec4 color;
+layout (location = 3) in vec2 texture_position; 
+layout (location = 4) in float ctt;
+
+uniform mat4 view_matrix;
+uniform mat4 projection_matrix;
+
+out vec4 _color;
+out vec2 _texture_position;
+out float _ctt;
+
+void main() {
+    vec3 origined_position = origin.xyz + position.xyz;
+    //gl_Position = projection_matrix * view_matrix * position;
+    gl_Position = projection_matrix * view_matrix * vec4(position.xyz, 1.0);
+    _color = color;
+    _texture_position = texture_position;
+    _ctt = ctt;
+}

07-boilerplate/assets/shaders/fragment.glsl

@@ -0,0 +1,13 @@
+#version 330 core
+out vec4 color; 
+in vec2 tex_coord;
+
+uniform sampler2D sampler;
+
+void main() {
+    color = texture(sampler, tex_coord);
+//    color = vec4(1.0, 0.0, 0.0, 1.0);
+
+    if (color.a < 0.1) 
+        discard;
+}

07-boilerplate/assets/shaders/vertex.glsl

@@ -0,0 +1,14 @@
+#version 330 core 
+
+layout (location = 0) in vec3 pos; 
+layout (location = 1) in vec2 texture_coord; 
+
+uniform mat4 view;
+uniform mat4 projection; 
+
+out vec2 tex_coord;
+
+void main() {
+    gl_Position = projection * view * vec4(pos.xyz, 1.0);
+    tex_coord = texture_coord;
+}

07-boilerplate/src/base/common.cpp

@@ -0,0 +1,22 @@
+#include <iostream>
+#include <fstream>
+#include "common.hpp"
+
+std::string read_file(const char *path) {
+    std::string content;
+    std::ifstream fs(path, std::ios::in);
+
+    if(!fs.is_open()) {
+        std::cerr << "Error: Could not read file " << path << ". File does not exist." << std::endl;
+        return NULL;
+    }
+
+    std::string line = "";
+    while(!fs.eof()) {
+        std::getline(fs, line);
+        content.append(line + "\n");
+    }
+
+    fs.close();
+    return content;
+}

07-boilerplate/src/base/common.hpp

@@ -0,0 +1,5 @@
+#pragma once 
+
+#include <string>
+
+std::string read_file(const char *path);

07-boilerplate/src/base/graphics/graphics.hpp

@@ -0,0 +1,10 @@
+#pragma once 
+
+#define DEFAULT_POSITION_ATTRIBUTE  0 
+#define DEFAULT_ORIGIN_ATTRIBUTE    1
+#define DEFAULT_COLOR_ATTRIBUTE     2 
+#define DEFAULT_TEXTURE_ATTRIBUTE   3 
+#define DEFAULT_CTT_ATTRIBUTE       4 
+
+#define QUAD                        6 
+#define DEFAULT_VBO_SIZE            QUAD * 1000 // unit: rows of RenderData

07-boilerplate/src/base/graphics/program.cpp

@@ -0,0 +1,38 @@
+#include <iostream>
+#include <GL/glew.h>
+#include "program.hpp"
+#include "../macros.hpp"
+
+Program::Program() {
+    this->id = glCreateProgram();
+}
+
+int Program::add_shader(const char *path, unsigned int type) {
+    Shader new_shader; 
+    unsigned int ret = new_shader.load(path, type);
+
+    if (!ret) 
+        return RET_ERR;
+
+    this->shaders.push_back(new_shader);
+
+    return 0;
+}
+
+int Program::link() {
+    for (int shader = 0; shader < this->shaders.size(); shader++) 
+        glAttachShader(this->id, this->shaders[shader].id);
+        
+    glLinkProgram(this->id);
+
+    int success; 
+    char info_log[512]; 
+    glGetProgramiv(this->id, GL_LINK_STATUS, &success); 
+
+    if (!success) {
+        glGetProgramInfoLog(this->id, 512, NULL, info_log); 
+        return RET_ERR;
+    }
+
+    return 0;
+}

07-boilerplate/src/base/graphics/program.hpp

@@ -0,0 +1,14 @@
+#pragma once 
+
+#include <GL/glew.h>
+#include <vector>
+#include "shader.hpp"
+
+struct Program {
+    GLuint id;
+    std::vector<Shader> shaders;
+
+    Program();
+    int add_shader(const char *path, unsigned int type);
+    int link();
+};

07-boilerplate/src/base/graphics/renderer.cpp

@@ -0,0 +1,142 @@
+#include <optional>
+#include <glm/vec3.hpp>
+#include <glm/mat4x4.hpp>
+#include <glm/gtc/type_ptr.hpp>
+#include "renderer.hpp"
+#include "../macros.hpp"
+#include "graphics.hpp"
+
+Renderer::Renderer(Window &window) : window(window) {
+    pack = RendererPack();
+    this->window = window;
+    
+    glGenBuffers(1, &this->vertex_buffer_id);
+    glGenVertexArrays(1, &this->array_buffer_id);
+
+    this->view_matrix = glm::mat4(1.0f);
+    this->projection_matrix = glm::mat4(1.0f);
+}
+
+int Renderer::setup(std::optional<Program> program) {
+    int ret;
+
+    if (program != std::nullopt)
+        this->program = program.value();
+    else {
+        Program new_program = Program();
+
+        ret = new_program.add_shader("assets/shaders/default_vertex.glsl", GL_VERTEX_SHADER);
+        if (ret != RET_OK) {
+            LOG(LOG_ERR, "Failed adding vertex shader to program");
+            return RET_ERR;
+        }
+
+        ret = new_program.add_shader("assets/shaders/default_fragment.glsl", GL_FRAGMENT_SHADER);
+        if (ret != RET_OK) {
+            LOG(LOG_ERR, "Failed adding fragment shader to program");
+            return RET_ERR;
+        }
+
+        ret = new_program.link();
+        if (ret != RET_OK) {
+            LOG(LOG_ERR, "Failed linking program");
+            return RET_ERR;
+        }
+
+        this->program = new_program;
+    }
+
+    glBindVertexArray(this->array_buffer_id);
+    glBindBuffer(GL_ARRAY_BUFFER, this->vertex_buffer_id);
+
+    glBufferData(GL_ARRAY_BUFFER, sizeof(struct RendererData) * DEFAULT_VBO_SIZE, nullptr, GL_DYNAMIC_DRAW);
+
+    glVertexAttribPointer(
+        DEFAULT_POSITION_ATTRIBUTE, 
+        4, 
+        GL_FLOAT, 
+        GL_FALSE, 
+        sizeof(struct RendererData),
+        (void *) offsetof(RendererData, vertex)
+    );
+    glEnableVertexAttribArray(DEFAULT_POSITION_ATTRIBUTE);
+
+    glVertexAttribPointer(
+        DEFAULT_ORIGIN_ATTRIBUTE,
+        4, 
+        GL_FLOAT, 
+        GL_FALSE, 
+        sizeof(struct RendererData), 
+        (void *) offsetof(RendererData, origin)
+    );
+    glEnableVertexAttribArray(DEFAULT_ORIGIN_ATTRIBUTE);
+
+    glVertexAttribPointer(
+        DEFAULT_COLOR_ATTRIBUTE, 
+        4, 
+        GL_FLOAT,
+        GL_FALSE,
+        sizeof(struct RendererData), 
+        (void *) offsetof(RendererData, color)
+    );
+    glEnableVertexAttribArray(DEFAULT_COLOR_ATTRIBUTE);
+
+    glVertexAttribPointer(
+        DEFAULT_TEXTURE_ATTRIBUTE, 
+        2, 
+        GL_FLOAT,
+        GL_FALSE,
+        sizeof(struct RendererData), 
+        (void *) offsetof(RendererData, tex)
+    );
+    glEnableVertexAttribArray(DEFAULT_TEXTURE_ATTRIBUTE);
+
+    glVertexAttribPointer(
+        DEFAULT_COLOR_ATTRIBUTE, 
+        1, 
+        GL_FLOAT,
+        GL_FALSE,
+        sizeof(struct RendererData), 
+        (void *) offsetof(RendererData, ctt_ratio)
+    );
+    glEnableVertexAttribArray(DEFAULT_CTT_ATTRIBUTE);
+
+    // setup matrices 
+    this->view_matrix = glm::translate(this->view_matrix, glm::vec3(0.0f, 0.0f, -3.0f));
+    
+    return RET_OK;
+}
+
+void Renderer::render() {
+    glBindVertexArray(this->array_buffer_id);
+    glBindBuffer(GL_ARRAY_BUFFER, this->vertex_buffer_id);
+
+    glUseProgram(this->program.id);
+
+    glUniformMatrix4fv(glGetUniformLocation(this->program.id, "view_matrix"), 1, GL_FALSE, &this->view_matrix[0][0]);
+    glUniformMatrix4fv(glGetUniformLocation(this->program.id, "projection_matrix"), 1, GL_FALSE, &this->projection_matrix[0][0]);
+
+    glDrawArrays(GL_TRIANGLES, 0, DEFAULT_VBO_SIZE);
+}
+
+void Renderer::logic() {
+    int window_width; 
+    int window_height; 
+    float half_width; 
+    float half_height; 
+
+    this->window.get_size(&window_width, &window_height);
+
+    half_width = window_width / 2.0f;
+    half_height = window_height / 2.0f;
+
+    this->projection_matrix = glm::ortho(-half_width/100, half_width/100, -half_height/100, half_height/100, 0.1f, 100.0f);
+
+}
+
+Renderer::~Renderer() {
+    glDisableVertexAttribArray(DEFAULT_POSITION_ATTRIBUTE);
+    glDisableVertexAttribArray(DEFAULT_COLOR_ATTRIBUTE);
+    glDisableVertexAttribArray(DEFAULT_TEXTURE_ATTRIBUTE);
+    glDisableVertexAttribArray(DEFAULT_CTT_ATTRIBUTE);
+}

07-boilerplate/src/base/graphics/renderer.hpp

@@ -0,0 +1,28 @@
+#pragma once 
+
+#include <GL/glew.h>
+#include <optional>
+#include <glm/mat4x4.hpp>
+#include "renderer_pack.hpp"
+#include "program.hpp"
+#include "../window/window.hpp"
+
+class Renderer {
+public: 
+    GLuint array_buffer_id;
+    GLuint vertex_buffer_id;
+    Program program;
+    RendererPack pack;
+
+    glm::mat4 view_matrix; 
+    glm::mat4 projection_matrix;
+
+    Window &window;
+
+    Renderer(Window &window);
+    ~Renderer();
+
+    int setup(std::optional<Program> program = std::nullopt);
+    void logic();
+    void render();
+};

07-boilerplate/src/base/graphics/renderer_pack.cpp

@@ -0,0 +1,9 @@
+#include "renderer_pack.hpp"
+
+RendererPack::RendererPack() {
+    this->data = std::vector<struct RendererData>();
+}
+
+RendererPack::~RendererPack(){
+    
+}

07-boilerplate/src/base/graphics/renderer_pack.hpp

@@ -0,0 +1,22 @@
+#pragma once 
+
+#include <iostream>
+#include <vector>
+#include <glm/vec4.hpp>
+#include <glm/vec2.hpp>
+
+struct RendererData {
+    glm::vec4 vertex; 
+    glm::vec4 origin;
+    glm::vec4 color; 
+    glm::vec2 tex;
+    float ctt_ratio; // color to texture ratio (i.e. how much does the color affect the texture)
+};
+
+class RendererPack {
+
+public:
+    std::vector<struct RendererData> data;
+    RendererPack();
+    ~RendererPack();
+};

07-boilerplate/src/base/graphics/shader.cpp

@@ -0,0 +1,33 @@
+#include <iostream>
+#include <GL/glew.h>
+#include "shader.hpp"
+#include "../common.hpp"
+#include "../macros.hpp"
+
+unsigned int Shader::load(const char *path, unsigned int type) {
+    std::string source_s = read_file(path);
+    const char *source = source_s.c_str();
+
+    unsigned int new_shader = glCreateShader(type); 
+    if (!new_shader) 
+        return 0; 
+
+    glShaderSource(new_shader, 1, &source, NULL); 
+    glCompileShader(new_shader); 
+
+    int success; 
+    char info_log[512]; 
+    glGetShaderiv(new_shader, GL_COMPILE_STATUS, &success); 
+
+    if (!success) {
+        glGetShaderInfoLog(new_shader, 512, NULL, info_log); 
+        std::cout << "Error: failed compiling new shader " << info_log << std::endl; 
+        LOG(LOG_ERR, "Failed compiling new shader");
+        return RET_OK;
+    }
+
+    this->id = new_shader; 
+    this->type = type;
+
+    return new_shader;
+}

07-boilerplate/src/base/graphics/shader.hpp

@@ -0,0 +1,8 @@
+#pragma once 
+
+struct Shader {
+     unsigned int id; 
+     unsigned int type; 
+
+     unsigned int load(const char *path, unsigned int type);
+};

07-boilerplate/src/base/macros.hpp

@@ -0,0 +1,12 @@
+#pragma once 
+
+#include <iostream>
+
+#define LOG_DEBUG "debug"
+#define LOG_WARN "warning"
+#define LOG_ERR "error"
+
+#define LOG(level, ...) std::cout << "[" << __TIME__ << " " << level << "]: " << __VA_ARGS__ << std::endl;
+
+#define RET_OK 0 
+#define RET_ERR -1 

07-boilerplate/src/base/window/window.cpp

@@ -0,0 +1,39 @@
+#include <iostream>
+#include <GL/glew.h>
+#include <GLFW/glfw3.h>
+#include "window.hpp"
+#include "../macros.hpp"
+
+int Window::init(int width, int height, std::string title) {
+    glfwInit();
+    glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
+    glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
+    glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
+
+    this->window = glfwCreateWindow(width, height, title.c_str(), NULL, NULL);
+    if (this->window == NULL) {
+        LOG(LOG_ERR, "Failed creating window");
+        glfwTerminate();
+        return RET_ERR;
+    }
+
+    glfwMakeContextCurrent(this->window);
+
+    GLenum err = glewInit();
+    if (err != GLEW_OK) {
+        LOG(LOG_ERR, "FAiled initializing Glew");
+        return RET_ERR;
+    }
+
+    glfwSetFramebufferSizeCallback(this->window, this->resize_callback);
+
+    return RET_OK;
+}
+
+void Window::resize_callback(GLFWwindow *window, int new_width, int new_height) {
+    glViewport(0, 0, new_width, new_height);
+}
+
+void Window::get_size(int *width, int *height) {
+    glfwGetWindowSize(this->window, width, height);
+}

07-boilerplate/src/base/window/window.hpp

@@ -0,0 +1,13 @@
+#pragma once 
+#include <iostream>
+#include <GLFW/glfw3.h>
+
+class Window {
+public: 
+    int init(int width, int height, std::string title);
+
+    static void resize_callback(GLFWwindow *window, int new_width, int new_height);
+    void get_size(int *width, int *height);
+
+    GLFWwindow *window;
+};

07-boilerplate/src/main.cpp

@@ -0,0 +1,46 @@
+#include <iostream>
+#include <fstream>
+#include <GL/glew.h>
+#include <GLFW/glfw3.h>
+#include <stb/stb_image.h>
+#include "base/window/window.hpp"
+#include "base/graphics/renderer.hpp"
+#include "base/macros.hpp"
+#include "sprites/sprite.hpp"
+
+const int initial_width = 1000; 
+const int initial_height = 600; 
+
+int main() {
+    Window window; 
+    window.init(initial_width, initial_height, "OpenGL");
+
+    Renderer main_renderer(window);
+    int ret = main_renderer.setup();
+    if (ret != RET_OK) {
+        LOG(LOG_ERR, "Failed setting up a new renderer");
+        return RET_ERR;
+    }
+
+    Sprite new_sprite(main_renderer.vertex_buffer_id);
+    new_sprite.bake();
+
+    new_sprite.origin = glm::vec4(0.0f, 0.0f, 0.0f, 1.0f);
+    new_sprite.color = glm::vec4(1.0f, 0.0f, 0.0f, 1.0f);
+
+    while (!glfwWindowShouldClose(window.window)) {
+        glClearColor(0, 0, 0, 1);
+        glClear(GL_COLOR_BUFFER_BIT);
+
+        new_sprite.update();
+        main_renderer.logic();
+        main_renderer.render();
+
+        glfwPollEvents();
+        glfwSwapBuffers(window.window);
+    }
+
+
+    glfwTerminate();
+    return RET_OK;
+}

07-boilerplate/src/other/stb_image.cpp

@@ -0,0 +1,2 @@
+#define STB_IMAGE_IMPLEMENTATION
+#include "stb_image.h"

07-boilerplate/src/sprites/sprite.cpp

@@ -0,0 +1,46 @@
+#include <iostream>
+#include <vector>
+#include <glm/vec4.hpp>
+#include <glm/vec2.hpp>
+#include <GL/glew.h>
+#include "../base/graphics/renderer_pack.hpp"
+#include "sprite.hpp"
+
+Sprite::Sprite(GLuint vertex_buffer_id) {
+    this->vertices = std::vector<glm::vec4>();
+    this->origin = glm::vec4(1.0f);
+    this->color = glm::vec4(1.0f);
+    this->texture_position = glm::vec2(0.0f);
+    this->ctt = 1.0f;
+    this->vertex_buffer_id = vertex_buffer_id;
+}
+
+void Sprite::bake() {
+    this->vertices.push_back(glm::vec4(0.5f, 0.5f, 0.0f, 0.0f));
+    this->vertices.push_back(glm::vec4(0.5f, -0.5f, 0.0f, 0.0f));
+    this->vertices.push_back(glm::vec4(-0.5f, -0.5f, 0.0f, 0.0f));
+
+    this->vertices.push_back(glm::vec4(-0.5f, 0.5f, 0.0f, 0.0f));
+    this->vertices.push_back(glm::vec4(0.5f, 0.5f, 0.0f, 0.0f));
+    this->vertices.push_back(glm::vec4(-0.5f, -0.5f, 0.0f, 0.0f));
+}
+
+void Sprite::update() {
+    for (int i = 0; i < this->vertices.size(); i++) {
+        struct RendererData data = {
+            .vertex = this->vertices[i],
+            .origin = this->origin,
+            .color = this->color, 
+            .tex = this->texture_position, 
+            .ctt_ratio = this->ctt
+        }; 
+
+        glBindBuffer(GL_ARRAY_BUFFER, this->vertex_buffer_id);
+        glBufferSubData(GL_ARRAY_BUFFER, i*sizeof(struct RendererData), sizeof(struct RendererData), &data);
+        glBindBuffer(GL_ARRAY_BUFFER, 0);
+    }
+}
+
+Sprite::~Sprite() {
+
+}

07-boilerplate/src/sprites/sprite.hpp

@@ -0,0 +1,24 @@
+#pragma once 
+
+#include <iostream>
+#include <vector>
+#include <glm/vec4.hpp>
+#include <glm/vec2.hpp>
+#include <GL/glew.h>
+
+class Sprite {
+public:
+    std::vector<glm::vec4> vertices;
+    glm::vec4 origin;
+    glm::vec4 color; 
+    glm::vec2 texture_position;
+    float ctt;
+
+    GLuint vertex_buffer_id;
+
+    Sprite(GLuint vertex_buffer_id);
+    ~Sprite();
+
+    void bake();
+    void update();
+};