Port project over to C, some C++ left

.clang-format

@@ -1,5 +1,5 @@
 {
-    ColumnLimit: 100,
+    ColumnLimit: 80,
     TabWidth: 4,
     IndentWidth: 4, # 1 tab
     UseTab: ForIndentation,

Dengine.vcxproj

@@ -122,7 +122,6 @@
   <ItemGroup>
     <ClCompile Include="src\AssetManager.cpp" />
     <ClCompile Include="src\dengine.cpp" />
-    <ClCompile Include="src\Entity.cpp" />
     <ClCompile Include="src\Renderer.cpp" />
     <ClCompile Include="src\Shader.cpp" />
     <ClCompile Include="src\WorldTraveller.cpp" />

Dengine.vcxproj.filters

@@ -36,9 +36,6 @@
     <ClCompile Include="src\WorldTraveller.cpp">
       <Filter>Source Files</Filter>
     </ClCompile>
-    <ClCompile Include="src\Entity.cpp">
-      <Filter>Source Files</Filter>
-    </ClCompile>
   </ItemGroup>
   <ItemGroup>
     <None Include="data\shaders\default.vert.glsl" />

src/AssetManager.cpp

@@ -1,17 +1,14 @@
-#include <Dengine\AssetManager.h>
+#include <Dengine/AssetManager.h>
 
 #define STBI_FAILURE_USERMSG
 #define STB_IMAGE_IMPLEMENTATION
 #include <STB/stb_image.h>
 #include <fstream>
 
-namespace Dengine
+std::map<std::string, Texture> textures;
-{
+std::map<std::string, Shader> shaders;
 
-std::map<std::string, Texture> AssetManager::textures;
+Texture *asset_getTexture(const std::string name)
-std::map<std::string, Shader> AssetManager::shaders;
-
-Texture *AssetManager::getTexture(const std::string name)
 {
 	// NOTE(doyle): Since we're using a map, the count of an object can
 	// only be 1 or 0
@@ -21,29 +18,31 @@ Texture *AssetManager::getTexture(const std::string name)
 	return nullptr;
 }
 
-const i32 AssetManager::loadTextureImage(const std::string path, const std::string name)
+const i32 asset_loadTextureImage(const std::string path, const std::string name)
 {
 	/* Open the texture image */
 	i32 imgWidth, imgHeight, bytesPerPixel;
 	stbi_set_flip_vertically_on_load(TRUE);
-	u8 *image = stbi_load(path.c_str(), &imgWidth, &imgHeight, &bytesPerPixel, 0);
+	u8 *image =
+	    stbi_load(path.c_str(), &imgWidth, &imgHeight, &bytesPerPixel, 0);
 
 	if (!image)
 	{
-		std::cerr << "stdbi_load() failed: " << stbi_failure_reason() << std::endl;
+		std::cerr << "stdbi_load() failed: " << stbi_failure_reason()
+		          << std::endl;
 		return -1;
 	}
 
-	Texture tex;
+	Texture tex = genTexture(CAST(GLuint)(imgWidth), CAST(GLuint)(imgHeight),
-	tex.generate(static_cast<GLuint>(imgWidth), static_cast<GLuint>(imgHeight),
+	                         CAST(GLint)(bytesPerPixel), image);
-	             static_cast<GLint>(bytesPerPixel), image);
+	glCheckError();
 	stbi_image_free(image);
 
 	textures[name] = tex;
 	return 0;
 }
 
-Shader *AssetManager::getShader(const std::string name)
+Shader *asset_getShader(const std::string name)
 {
 	if (shaders.count(name) == 1)
 		return &shaders[name];
@@ -96,19 +95,19 @@ INTERNAL GLuint createShaderFromPath(std::string path, GLuint shadertype)
 	return result;
 }
 
-const i32 AssetManager::loadShaderFiles(const std::string vertexPath,
+const i32 asset_loadShaderFiles(const std::string vertexPath,
-                                        const std::string fragmentPath, const std::string name)
+                                const std::string fragmentPath,
+                                const std::string name)
 {
-
 	GLuint vertexShader = createShaderFromPath(vertexPath, GL_VERTEX_SHADER);
-	GLuint fragmentShader = createShaderFromPath(fragmentPath, GL_FRAGMENT_SHADER);
+	GLuint fragmentShader =
+	    createShaderFromPath(fragmentPath, GL_FRAGMENT_SHADER);
 
 	Shader shader;
-	i32 result = shader.loadProgram(vertexShader, fragmentShader);
+	i32 result = shader_loadProgram(&shader, vertexShader, fragmentShader);
 	if (result)
 		return result;
 
 	shaders[name] = shader;
 	return 0;
 }
-}

src/Entity.cpp

@@ -1,44 +0,0 @@
-#include <Dengine/Entity.h>
-#include <Dengine/AssetManager.h>
-
-namespace Dengine
-{
-
-Entity::Entity()
-: pos(glm::vec2(0, 0))
-, dPos(glm::vec2(0, 0))
-, size(glm::vec2(0, 0))
-, tex(nullptr)
-{
-}
-
-Entity::Entity(const glm::vec2 pos, const Texture *tex)
-{
-	this->pos  = pos;
-	this->dPos = glm::vec2(0, 0);
-	this->tex  = tex;
-	this->size = glm::vec2(tex->getWidth(), tex->getHeight());
-}
-
-Entity::Entity(const glm::vec2 pos, glm::vec2 size, const Texture *tex)
-{
-	this->pos  = pos;
-	this->dPos = glm::vec2(0, 0);
-	this->tex  = tex;
-	this->size = size;
-}
-
-Entity::Entity(const glm::vec2 pos, const std::string texName)
-{
-	Texture *tex = AssetManager::getTexture(texName);
-	this->pos  = pos;
-	this->dPos = glm::vec2(0, 0);
-	this->tex  = tex;
-	this->size = glm::vec2(tex->getWidth(), tex->getHeight());
-
-}
-
-Entity::~Entity()
-{
-}
-}

src/Renderer.cpp

@@ -4,74 +4,35 @@
 #include <glm/gtc/matrix_transform.hpp>
 #include <glm/gtx/transform.hpp>
 
-namespace Dengine
+void renderer_entity(Renderer *renderer, Entity *entity, GLfloat rotate,
+                     glm::vec3 color)
 {
-Renderer::Renderer(Shader *shader)
+	shader_use(renderer->shader);
-{
-	this->shader = shader;
-	this->initRenderData();
-}
-
-Renderer::~Renderer() { glDeleteVertexArrays(1, &this->quadVAO); }
-void Renderer::drawEntity(Entity *entity, GLfloat rotate, glm::vec3 color)
-{
-	this->shader->use();
 	glm::mat4 transMatrix  = glm::translate(glm::vec3(entity->pos, 0.0f));
 	glm::mat4 rotateMatrix = glm::rotate(rotate, glm::vec3(0.0f, 0.0f, 1.0f));
+	glCheckError();
 
 	// NOTE(doyle): We draw everything as a unit square in OGL. Scale it to size
 	glm::mat4 scaleMatrix = glm::scale(glm::vec3(entity->size, 1.0f));
 
 	glm::mat4 model = transMatrix * rotateMatrix * scaleMatrix;
-
+	shader_uniformSetMat4fv(renderer->shader, "model", model);
-	this->shader->uniformSetMat4fv("model", model);
+	glCheckError();
 
 	// TODO(doyle): Unimplemented
 	// this->shader->uniformSetVec3f("spriteColor", color);
 
 	glActiveTexture(GL_TEXTURE0);
-	entity->tex->bind();
+	glCheckError();
-	this->shader->uniformSet1i("tex", 0);
+	glBindTexture(GL_TEXTURE_2D, entity->tex->id);
+	glCheckError();
+	shader_uniformSet1i(renderer->shader, "tex", 0);
+	glCheckError();
 
-	glBindVertexArray(this->quadVAO);
+	glBindVertexArray(renderer->quadVAO);
+	glCheckError();
 	glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
+	glCheckError();
 	glBindVertexArray(0);
-}
+	glCheckError();
-
-void Renderer::initRenderData()
-{
-	// NOTE(doyle): Draws a series of triangles (three-sided polygons) using
-	// vertices v0, v1, v2, then v2, v1, v3 (note the order)
-	glm::vec4 vertices[] = {
-	    //  x     y       s     t
-	    {0.0f, 1.0f, 0.0f, 1.0f}, // Top left
-	    {0.0f, 0.0f, 0.0f, 0.0f}, // Bottom left
-	    {1.0f, 1.0f, 1.0f, 1.0f}, // Top right
-	    {1.0f, 0.0f, 1.0f, 0.0f}, // Bottom right
-	};
-
-	GLuint VBO;
-
-	/* Create buffers */
-	glGenVertexArrays(1, &this->quadVAO);
-	glGenBuffers(1, &VBO);
-
-	/* Bind buffers */
-	glBindBuffer(GL_ARRAY_BUFFER, VBO);
-	glBindVertexArray(this->quadVAO);
-
-	/* Configure VBO */
-	glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW);
-
-	/* Configure VAO */
-	const GLuint numVertexElements = 4;
-	const GLuint vertexSize        = sizeof(glm::vec4);
-
-	glEnableVertexAttribArray(0);
-	glVertexAttribPointer(0, numVertexElements, GL_FLOAT, GL_FALSE, vertexSize, (GLvoid *)0);
-
-	/* Unbind */
-	glBindBuffer(GL_ARRAY_BUFFER, 0);
-	glBindVertexArray(0);
-}
 }

src/Shader.cpp

@@ -1,55 +1,46 @@
-#include <Dengine\Shader.h>
+#include <Dengine/Shader.h>
 
 #include <glm/gtc/type_ptr.hpp>
 
 #include <fstream>
 #include <iostream>
 
-namespace Dengine
+const i32 shader_loadProgram(Shader *const shader, const GLuint vertexShader,
+                             const GLuint fragmentShader)
 {
-Shader::Shader()
+	shader->id = glCreateProgram();
-: id(0)
+	glAttachShader(shader->id, vertexShader);
-{
+	glAttachShader(shader->id, fragmentShader);
-}
+	glLinkProgram(shader->id);
-
-Shader::~Shader() {}
-
-const i32 Shader::loadProgram(const GLuint vertexShader, const GLuint fragmentShader)
-{
-	this->id = glCreateProgram();
-	glAttachShader(this->id, vertexShader);
-	glAttachShader(this->id, fragmentShader);
-	glLinkProgram(this->id);
 
 	glDeleteShader(fragmentShader);
 	glDeleteShader(vertexShader);
 
 	GLint success;
 	GLchar infoLog[512];
-	glGetProgramiv(this->id, GL_LINK_STATUS, &success);
+	glGetProgramiv(shader->id, GL_LINK_STATUS, &success);
 	if (!success)
 	{
-		glGetProgramInfoLog(this->id, 512, NULL, infoLog);
+		glGetProgramInfoLog(shader->id, 512, NULL, infoLog);
-		std::cout << "glLinkProgram failed: " << infoLog << std::endl;
+		printf("glLinkProgram failed: %s\n", infoLog);
 		return -1;
 	}
 
 	return 0;
 }
 
-void Shader::uniformSet1i(const GLchar *name, const GLuint data)
+void shader_uniformSet1i(Shader *const shader, const GLchar *name,
+                         const GLuint data)
 {
-	GLint uniformLoc = glGetUniformLocation(this->id, name);
+	GLint uniformLoc = glGetUniformLocation(shader->id, name);
 	glUniform1i(uniformLoc, data);
 }
 
-void Shader::uniformSetMat4fv(const GLchar *name, const glm::mat4 data)
+void shader_uniformSetMat4fv(Shader *const shader, const GLchar *name,
+                             const glm::mat4 data)
 {
-	GLint uniformLoc = glGetUniformLocation(this->id, name);
+	GLint uniformLoc = glGetUniformLocation(shader->id, name);
-	glCheckError();
 	glUniformMatrix4fv(uniformLoc, 1, GL_FALSE, glm::value_ptr(data));
-	glCheckError();
 }
 
-void Shader::use() const { glUseProgram(this->id); }
+void shader_use(const Shader *const shader) { glUseProgram(shader->id); }
-}

src/Texture.cpp

@@ -1,21 +1,5 @@
 #include <Dengine\Texture.h>
 
-namespace Dengine
-{
-Texture::Texture()
-: id(0)
-, width(0)
-, height(0)
-, internalFormat(GL_RGBA)
-, imageFormat(GL_RGB)
-, wrapS(GL_REPEAT)
-, wrapT(GL_REPEAT)
-, filterMinification(GL_LINEAR)
-, filterMagnification(GL_LINEAR)
-{
-	glGenTextures(1, &this->id);
-}
-
 enum BytesPerPixel
 {
 	Greyscale      = 1,
@@ -24,7 +8,7 @@ enum BytesPerPixel
 	RGBA           = 4,
 };
 
-INTERNAL GLint getGLFormat(BytesPerPixel bytesPerPixel, b32 srgb)
+INTERNAL GLint getGLFormat(i32 bytesPerPixel, b32 srgb)
 {
 	switch (bytesPerPixel)
 	{
@@ -44,32 +28,54 @@ INTERNAL GLint getGLFormat(BytesPerPixel bytesPerPixel, b32 srgb)
 	}
 }
 
-void Texture::generate(const GLuint width, const GLuint height, const GLint bytesPerPixel,
+Texture genTexture(const GLuint width, const GLuint height,
-                       const u8 *const image)
+                   const GLint bytesPerPixel, const u8 *const image)
 {
 	// TODO(doyle): Let us set the parameters gl params as well
-	this->width  = width;
+	glCheckError();
-	this->height = height;
+	Texture tex = {};
+	tex.width  = width;
+	tex.height = height;
+	tex.internalFormat = GL_RGBA;
+	tex.wrapS = GL_REPEAT;
+	tex.wrapT = GL_REPEAT;
+	tex.filterMinification = GL_LINEAR;
+	tex.filterMagnification = GL_LINEAR;
 
-	glBindTexture(GL_TEXTURE_2D, this->id);
+	glGenTextures(1, &tex.id);
+	glCheckError();
+
+
+	glBindTexture(GL_TEXTURE_2D, tex.id);
+	glCheckError();
 
 	/* Load image into texture */
 	// TODO(doyle) Figure out the gl format
-	this->imageFormat = getGLFormat(static_cast<enum BytesPerPixel>(bytesPerPixel), FALSE);
+	tex.imageFormat = getGLFormat(bytesPerPixel, FALSE);
+	glCheckError();
 
-	glTexImage2D(GL_TEXTURE_2D, 0, this->internalFormat, this->width, this->height, 0,
+	glTexImage2D(GL_TEXTURE_2D, 0, tex.internalFormat, tex.width, tex.height, 0,
-	             this->imageFormat, GL_UNSIGNED_BYTE, image);
+	             tex.imageFormat, GL_UNSIGNED_BYTE, image);
+	glCheckError();
+	glActiveTexture(GL_TEXTURE0);
+	// TODO(doyle): Don't forget about thsi!
+	glTexSubImage2D(GL_TEXTURE_2D, 0, 3, 3, 55, 55, GL_RGBA, GL_UNSIGNED_BYTE,
+	                image);
+	glCheckError();
 	glGenerateMipmap(GL_TEXTURE_2D);
 
 	/* Set parameter of currently bound texture */
-	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, this->wrapS);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, tex.wrapS);
-	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, this->wrapT);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, tex.wrapT);
-	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, this->filterMinification);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
-	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, this->filterMagnification);
+	                tex.filterMinification);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER,
+	                tex.filterMagnification);
+	glCheckError();
 
 	/* Unbind and clean up */
 	glBindTexture(GL_TEXTURE_2D, 0);
-}
+	glCheckError();
 
-void Texture::bind() const { glBindTexture(GL_TEXTURE_2D, this->id); }
+	return tex;
 }

src/WorldTraveller.cpp

@@ -4,65 +4,85 @@
 #include <glm/gtc/matrix_transform.hpp>
 #include <glm/gtc/type_ptr.hpp>
 
-#include <cstdlib>
+void worldTraveller_gameInit(GameState *state)
-
-namespace WorldTraveller
-{
-
-// TODO(doyle): Entity list for each world
-// TODO(doyle): Jumping mechanics
-// TODO(doyle): Collision
-
-
-Game::Game(i32 width, i32 height)
-{
-	this->width  = width;
-	this->height = height;
-
-	for (i32 i        = 0; i < NUM_KEYS; i++)
-		this->keys[i] = FALSE;
-}
-
-Game::~Game() { delete this->renderer; }
-
-void Game::init()
 {
 	/* Initialise assets */
-	std::string texFolder = "data/textures/WorldTraveller/";
+
-	Dengine::AssetManager::loadShaderFiles("data/shaders/sprite.vert.glsl",
+	asset_loadTextureImage("data/textures/WorldTraveller/elisa-spritesheet1.png",
+	                 "hero");
+	glCheckError();
+
+	state->state       = state_active;
+	Renderer *renderer = &state->renderer;
+	asset_loadShaderFiles("data/shaders/sprite.vert.glsl",
 	                      "data/shaders/sprite.frag.glsl", "sprite");
+	glCheckError();
 
-	Dengine::AssetManager::loadTextureImage(texFolder + "hero.png", "hero");
+	renderer->shader = asset_getShader("sprite");
-	Dengine::AssetManager::loadTextureImage(texFolder + "wall.png", "wall");
+	shader_use(renderer->shader);
-	Dengine::AssetManager::loadTextureImage(texFolder + "hitMarker.png", "hitMarker");
+	glm::mat4 projection = glm::ortho(0.0f, CAST(GLfloat) state->width, 0.0f,
+	                                  CAST(GLfloat) state->height, 0.0f, 1.0f);
+	shader_uniformSetMat4fv(renderer->shader, "projection", projection);
+	glCheckError();
 
-	this->shader = Dengine::AssetManager::getShader("sprite");
+	/* Init renderer */
-	this->shader->use();
+	// NOTE(doyle): Draws a series of triangles (three-sided polygons) using
+	// vertices v0, v1, v2, then v2, v1, v3 (note the order)
+	glm::vec4 vertices[] = {
+	    //  x     y       s     t
+	    {0.0f, 1.0f, 0.0f, 1.0f}, // Top left
+	    {0.0f, 0.0f, 0.0f, 0.0f}, // Bottom left
+	    {1.0f, 1.0f, 1.0f, 1.0f}, // Top right
+	    {1.0f, 0.0f, 1.0f, 0.0f}, // Bottom right
+	};
 
-	glm::mat4 projection = glm::ortho(0.0f, static_cast<GLfloat>(this->width), 0.0f,
+	GLuint VBO;
-	                                  static_cast<GLfloat>(this->height), 0.0f, 1.0f);
+	/* Create buffers */
-	this->shader->uniformSetMat4fv("projection", projection);
+	glGenVertexArrays(1, &renderer->quadVAO);
+	glGenBuffers(1, &VBO);
+	glCheckError();
 
-	GLuint projectionLoc = glGetUniformLocation(this->shader->id, "projection");
+	/* Bind buffers */
-	glUniformMatrix4fv(projectionLoc, 1, GL_FALSE, glm::value_ptr(projection));
+	glBindBuffer(GL_ARRAY_BUFFER, VBO);
+	glBindVertexArray(renderer->quadVAO);
 
-	/* Init game state */
+	/* Configure VBO */
-	this->state    = state_active;
+	glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW);
-	this->renderer = new Dengine::Renderer(this->shader);
+	glCheckError();
 
+	/* Configure VAO */
+	const GLuint numVertexElements = 4;
+	const GLuint vertexSize        = sizeof(glm::vec4);
+
+	glEnableVertexAttribArray(0);
+	glVertexAttribPointer(0, numVertexElements, GL_FLOAT, GL_FALSE, vertexSize,
+	                      (GLvoid *)0);
+	glCheckError();
+
+	/* Unbind */
+	glBindBuffer(GL_ARRAY_BUFFER, 0);
+	glBindVertexArray(0);
+
+	glCheckError();
 	/* Init hero */
-	this->hero = Dengine::Entity(glm::vec2(0, 0), "hero");
 
-	glm::vec2 screenCentre       = glm::vec2(this->width / 2.0f, this->height / 2.0f);
+	Entity *hero = &state->hero;
-	glm::vec2 heroOffsetToCentre = glm::vec2(-((i32)hero.size.x / 2), -((i32)hero.size.y / 2));
+	hero->tex    = asset_getTexture("hero");
+	hero->size   = glm::vec2(100, 100);
+
+	glm::vec2 screenCentre =
+	    glm::vec2(state->width / 2.0f, state->height / 2.0f);
+	glm::vec2 heroOffsetToCentre =
+	    glm::vec2(-((i32)hero->size.x / 2), -((i32)hero->size.y / 2));
 
 	glm::vec2 heroCentered = screenCentre + heroOffsetToCentre;
-	hero.pos               = heroCentered;
+	hero->pos              = heroCentered;
 
-	srand(static_cast<u32>(glfwGetTime()));
+	srand(CAST(u32)(glfwGetTime()));
+	glCheckError();
 }
 
-void Game::update(const f32 dt)
+INTERNAL void parseInput(GameState *state, const f32 dt)
 {
 	/*
 	   Equations of Motion
@@ -78,24 +98,24 @@ void Game::update(const f32 dt)
 
 	glm::vec2 ddPos = glm::vec2(0, 0);
 
-	if (this->keys[GLFW_KEY_SPACE])
+	if (state->keys[GLFW_KEY_SPACE])
 	{
 	}
 
-	if (this->keys[GLFW_KEY_RIGHT])
+	if (state->keys[GLFW_KEY_RIGHT])
 	{
 		ddPos.x = 1.0f;
 	}
-	if (this->keys[GLFW_KEY_LEFT])
+	if (state->keys[GLFW_KEY_LEFT])
 	{
 		ddPos.x = -1.0f;
 	}
 
-	if (this->keys[GLFW_KEY_UP])
+	if (state->keys[GLFW_KEY_UP])
 	{
 		ddPos.y = 1.0f;
 	}
-	if (this->keys[GLFW_KEY_DOWN])
+	if (state->keys[GLFW_KEY_DOWN])
 	{
 		ddPos.y = -1.0f;
 	}
@@ -108,42 +128,33 @@ void Game::update(const f32 dt)
 		ddPos *= 0.70710678118f;
 	}
 
-	const f32 heroSpeed = static_cast<f32>((22.0f * METERS_TO_PIXEL)); // m/s^2
+	f32 heroSpeed = CAST(f32)(22.0f * METERS_TO_PIXEL); // m/s^2
+	if (state->keys[GLFW_KEY_LEFT_SHIFT])
+	{
+		heroSpeed = CAST(f32)(22.0f * 5.0f * METERS_TO_PIXEL);
+	}
 	ddPos *= heroSpeed;
 
 	// TODO(doyle): Counteracting force on player's acceleration is arbitrary
-	ddPos += -(5.5f * hero.dPos);
+	Entity *hero = &state->hero;
+	ddPos += -(5.5f * hero->dPos);
 
-	glm::vec2 newHeroP = (0.5f * ddPos) * Dengine::Math::squared(dt) + (hero.dPos * dt) + hero.pos;
+	glm::vec2 newHeroP =
+	    (0.5f * ddPos) * squared(dt) + (hero->dPos * dt) + hero->pos;
 
-	hero.dPos = (ddPos * dt) + hero.dPos;
+	hero->dPos = (ddPos * dt) + hero->dPos;
-	hero.pos = newHeroP;
+	hero->pos  = newHeroP;
 }
 
-void Game::render()
+void worldTraveller_gameUpdateAndRender(GameState *state, const f32 dt)
 {
+	/* Update */
+	parseInput(state, dt);
+	glCheckError();
 
-	Dengine::Renderer *renderer = this->renderer;
+	/* Render */
-
+	renderer_entity(&state->renderer, &state->hero);
-	Dengine::Entity wall = Dengine::Entity(glm::vec2(0, 0), "wall");
+	// TODO(doyle): Clean up lines
-	glm::vec2 maxTilesOnScreen =
+	// Renderer::~Renderer() { glDeleteVertexArrays(1, &this->quadVAO); }
-	    glm::vec2((this->width / wall.size.x), (this->height / wall.size.y));
-
-	Dengine::Entity hitMarker = Dengine::Entity(glm::vec2(100, 100), "hitMarker");
-
-	for (i32 x = 0; x < maxTilesOnScreen.x; x++)
-	{
-		for (i32 y = 0; y < maxTilesOnScreen.y; y++)
-		{
-			if (x == 0 || x == maxTilesOnScreen.x - 1 || y == 0 || y == maxTilesOnScreen.y - 1)
-			{
-				wall.pos = glm::vec2(x * wall.tex->getWidth(), y * wall.tex->getHeight());
-
-				renderer->drawEntity(&wall);
 }
-		}
+
-	}
-	renderer->drawEntity(&hero);
-	renderer->drawEntity(&hitMarker);
-}
-} // namespace Dengine

src/dengine.cpp

@@ -11,23 +11,18 @@
 #include <glm/gtc/matrix_transform.hpp>
 #include <glm/gtc/type_ptr.hpp>
 
-#include <cstdint>
+#include <stdio.h>
-#include <fstream>
-#include <iostream>
-#include <sstream>
-#include <string>
 
 void key_callback(GLFWwindow *window, int key, int scancode, int action, int mode)
 {
-	WorldTraveller::Game *game =
+	GameState *game = CAST(GameState *)(glfwGetWindowUserPointer(window));
-	    static_cast<WorldTraveller::Game *>(glfwGetWindowUserPointer(window));
 
 	if (key == GLFW_KEY_ESCAPE && action == GLFW_PRESS)
 	{
 		glfwSetWindowShouldClose(window, GL_TRUE);
 	}
 
-	if (key >= 0 && key < WorldTraveller::NUM_KEYS)
+	if (key >= 0 && key < NUM_KEYS)
 	{
 		if (action == GLFW_PRESS)
 			game->keys[key] = TRUE;
@@ -50,11 +45,11 @@ int main()
 
 	glm::ivec2 windowSize = glm::ivec2(1280, 720);
 
-	GLFWwindow *window = glfwCreateWindow(windowSize.x, windowSize.y, "Dengine", nullptr, nullptr);
+	GLFWwindow *window = glfwCreateWindow(windowSize.x, windowSize.y, "Dengine", NULL, NULL);
 
 	if (!window)
 	{
-		std::cout << "glfwCreateWindow() failed: Failed to create window" << std::endl;
+		printf("glfwCreateWindow() failed: Failed to create window\n");
 		glfwTerminate();
 		return -1;
 	}
@@ -65,7 +60,7 @@ int main()
 	glewExperimental = GL_TRUE;
 	if (glewInit() != GLEW_OK)
 	{
-		std::cout << "glewInit() failed: Failed to initialise GLEW" << std::endl;
+		printf("glewInit() failed: Failed to initialise GLEW\n");
 		return -1;
 	}
 	// NOTE(doyle): glewInit() bug that sets the gl error flag after init
@@ -87,12 +82,16 @@ int main()
 	glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 	glCullFace(GL_BACK);
 
-	WorldTraveller::Game game = WorldTraveller::Game(frameBufferSize.x, frameBufferSize.y);
+	GameState worldTraveller = {};
-	game.init();
+	worldTraveller.state = state_active;
+	worldTraveller.width = frameBufferSize.x;
+	worldTraveller.height = frameBufferSize.y;
 
-	glfwSetWindowUserPointer(window, static_cast<void *>(&game));
+	worldTraveller_gameInit(&worldTraveller);
 
-	f32 startTime      = static_cast<f32>(glfwGetTime());
+	glfwSetWindowUserPointer(window, CAST(void *)(&worldTraveller));
+
+	f32 startTime      = CAST(f32)(glfwGetTime());
 	f32 secondsElapsed = 0.0f; // Time between current frame and last frame
 
 #if 0
@@ -109,23 +108,20 @@ int main()
 	/* Main game loop */
 	while (!glfwWindowShouldClose(window))
 	{
-
 		/* Check and call events */
 		glfwPollEvents();
 
-		game.update(secondsElapsed);
-
 		/* Rendering commands here*/
 		glClearColor(0.2f, 0.3f, 0.3f, 1.0f);
 		glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 
-		game.render();
+		worldTraveller_gameUpdateAndRender(&worldTraveller, secondsElapsed);
 		glCheckError();
 
 		/* Swap the buffers */
 		glfwSwapBuffers(window);
 
-		f32 endTime    = static_cast<f32>(glfwGetTime());
+		f32 endTime    = (f32)glfwGetTime();
 		secondsElapsed = endTime - startTime;
 
 #if 0
@@ -144,9 +140,12 @@ int main()
 		{
 			f32 msPerFrame      = secondsElapsed * 1000.0f;
 			f32 framesPerSecond = 1.0f / secondsElapsed;
-			std::stringstream ss;
+
-			ss << "Dengine | " << msPerFrame << " ms/f | " << framesPerSecond << " fps";
+			char textBuffer[256];
-			glfwSetWindowTitle(window, ss.str().c_str());
+			snprintf(textBuffer, ARRAY_COUNT(textBuffer), "Dengine | %f ms/f | %f fps", msPerFrame,
+			         framesPerSecond);
+
+			glfwSetWindowTitle(window, textBuffer);
 			titleUpdateFrequencyInSeconds = 0.5f;
 		}
 

src/include/Dengine/AssetManager.h

@@ -9,22 +9,30 @@
 #include <map>
 #include <string>
 
-namespace Dengine
+enum Assets
 {
-class AssetManager
+	asset_vertShader,
+	asset_fragShader,
+	asset_hero,
+};
+
+struct AssetManager
 {
-public:
+	Textures textures[256];
-	static std::map<std::string, Texture> textures;
+	Shaders shaders[256];
-	static std::map<std::string, Shader> shaders;
+};
+extern std::map<std::string, Texture> textures;
+extern std::map<std::string, Shader> shaders;
 
 /* Texture */
-	static Texture *getTexture(const std::string name);
+Texture *asset_getTexture(const std::string name);
-	static const i32 loadTextureImage(const std::string path, const std::string name);
+const i32 asset_loadTextureImage(const std::string path,
+                                 const std::string name);
 
 /* Shaders */
-	static Shader *getShader(const std::string name);
+Shader *asset_getShader(const std::string name);
-	static const i32 loadShaderFiles(const std::string vertexPath, const std::string fragmentPath,
+const i32 asset_loadShaderFiles(const std::string vertexPath,
+                                const std::string fragmentPath,
                                 const std::string name);
-};
+
-}
 #endif

src/include/Dengine/Common.h

@@ -1,7 +1,8 @@
 #ifndef DENGINE_COMMON_H
 #define DENGINE_COMMON_H
 
-#include <cstdint>
+#include <stdint.h>
+#include <stdlib.h>
 
 typedef uint8_t u8;
 typedef uint32_t u32;
@@ -20,4 +21,7 @@ typedef double f64;
 #define INTERNAL static
 #define LOCAL_PERSIST static
 
+#define ARRAY_COUNT(array) (sizeof(array) / sizeof(array[0]))
+#define CAST(type) (type)
+
 #endif

src/include/Dengine/Entity.h

@@ -6,23 +6,12 @@
 
 #include <glm/glm.hpp>
 
-namespace Dengine
+struct Entity
 {
-class Entity
-{
-public:
-	Entity();
-	Entity(const glm::vec2 pos, const Texture *tex);
-	Entity(const glm::vec2 pos, const glm::vec2 size, const Texture *tex);
-	Entity(const glm::vec2 pos, const std::string texName);
-	~Entity();
-
-
 	glm::vec2 pos;  // Position
 	glm::vec2 dPos; // Velocity
-
 	glm::vec2 size;
-	const Texture *tex;
+	Texture *tex;
 };
-}
+
 #endif

src/include/Dengine/Math.h

@@ -3,17 +3,10 @@
 
 #include <Dengine/Common.h>
 
-namespace Dengine
+inline f32 squared(const f32 a)
-{
-class Math
-{
-public:
-	static inline f32 squared(const f32 a)
 {
 	f32 result = a * a;
 	return result;
 }
-};
-}
-#endif
 
+#endif

src/include/Dengine/OpenGL.h

@@ -5,40 +5,38 @@
 #include <GL/glew.h>
 #include <GLFW/glfw3.h>
 
-#include <iostream>
+#include <stdio.h>
-#include <string>
 
 inline GLenum glCheckError_(const char *file, int line)
 {
 	GLenum errorCode;
 	while ((errorCode = glGetError()) != GL_NO_ERROR)
 	{
-		std::string error;
 		switch (errorCode)
 		{
 		case GL_INVALID_ENUM:
-			error = "INVALID_ENUM";
+			printf("INVALID_ENUM | ");
 			break;
 		case GL_INVALID_VALUE:
-			error = "INVALID_VALUE";
+			printf("INVALID_VALUE | ");
 			break;
 		case GL_INVALID_OPERATION:
-			error = "INVALID_OPERATION";
+			printf("INVALID_OPERATION | ");
 			break;
 		case GL_STACK_OVERFLOW:
-			error = "STACK_OVERFLOW";
+			printf("STACK_OVERFLOW | ");
 			break;
 		case GL_STACK_UNDERFLOW:
-			error = "STACK_UNDERFLOW";
+			printf("STACK_UNDERFLOW | ");
 			break;
 		case GL_OUT_OF_MEMORY:
-			error = "OUT_OF_MEMORY";
+			printf("OUT_OF_MEMORY | ");
 			break;
 		case GL_INVALID_FRAMEBUFFER_OPERATION:
-			error = "INVALID_FRAMEBUFFER_OPERATION";
+			printf("INVALID_FRAMEBUFFER_OPERATION | ");
 			break;
 		}
-		std::cout << error << " | " << file << " (" << line << ")" << std::endl;
+		printf("%s (%d)\n", file, line);
 	}
 	return errorCode;
 }

src/include/Dengine/Renderer.h

@@ -8,22 +8,13 @@
 
 #include <GLM/glm.hpp>
 
-namespace Dengine
+struct Renderer
 {
-class Renderer
-{
-public:
-	Renderer(Shader *shader);
-	~Renderer();
-
-	void drawEntity(Entity *entity, GLfloat rotate = 0.0f, glm::vec3 color = glm::vec3(1.0f));
-
-private:
 	Shader *shader;
 	GLuint quadVAO;
-
-	void initRenderData();
 };
-}
+
+void renderer_entity(Renderer *renderer, Entity *entity, GLfloat rotate = 0.0f,
+                     glm::vec3 color = glm::vec3(1.0f));
 
 #endif

src/include/Dengine/Shader.h

@@ -6,25 +6,20 @@
 
 #include <glm/glm.hpp>
 
-#include <string>
+struct Shader
-
-namespace Dengine
 {
-class Shader
-{
-public:
 	GLuint id;
-
-	Shader();
-	~Shader();
-
-	const i32 loadProgram(const GLuint vertexShader, const GLuint fragmentShader);
-
-	void uniformSet1i(const GLchar *name, const GLuint data);
-	void uniformSetMat4fv(const GLchar *name, const glm::mat4 data);
-
-	void use() const;
 };
-}
+
+const i32 shader_loadProgram(Shader *const shader,
+                             const GLuint vertexShader,
+                             const GLuint fragmentShader);
+
+void shader_uniformSet1i(Shader *const shader, const GLchar *name,
+                         const GLuint data);
+void shader_uniformSetMat4fv(Shader *const shader, const GLchar *name,
+                             const glm::mat4 data);
+
+void shader_use(const Shader *const shader);
 
 #endif

src/include/Dengine/Texture.h

@@ -4,26 +4,8 @@
 #include <Dengine/Common.h>
 #include <Dengine/OpenGL.h>
 
-namespace Dengine
+struct Texture
 {
-class Texture
-{
-public:
-	// Constructor (sets default texture modes)
-	Texture();
-
-	// Generates texture from image data
-	void generate(const GLuint width, const GLuint height, const GLint bytesPerPixel,
-	              const u8 *const image);
-
-	// Binds the texture as the current active GL_TEXTURE_2D texture object
-	void bind() const;
-
-	inline const GLuint getWidth() const { return this->width; }
-	inline const GLuint getHeight() const { return this->height; }
-	inline const GLuint getID() const { return this->id; }
-
-private:
 	// Holds the ID of the texture object, used for all texture operations to
 	// reference to this particlar texture
 	GLuint id;
@@ -45,5 +27,9 @@ private:
 	// Filtering mode if texture pixels > screen pixels
 	GLuint filterMagnification;
 };
-}
+
+// Generates texture from image data
+Texture genTexture(const GLuint width, const GLuint height, const GLint bytesPerPixel,
+                   const u8 *const image);
+
 #endif

src/include/WorldTraveller/WorldTraveller.h

@@ -9,21 +9,8 @@
 #include <Dengine/Renderer.h>
 #include <Dengine/Shader.h>
 
-namespace WorldTraveller
+#define NUM_KEYS 1024
-{
+#define METERS_TO_PIXEL 100
-GLOBAL_VAR const i32 NUM_KEYS = 1024;
-GLOBAL_VAR const f32 METERS_TO_PIXEL = 100;
-
-enum Cardinal
-{
-	cardinal_north = 0,
-	cardinal_west  = 1,
-	cardinal_south = 2,
-	cardinal_east  = 3,
-	cardinal_num,
-	cardinal_null
-
-};
 
 enum State
 {
@@ -32,25 +19,16 @@ enum State
 	state_win
 };
 
-class Game
+struct GameState
 {
-public:
 	State state;
 	GLboolean keys[NUM_KEYS];
 	i32 width, height;
 
-	Game(i32 width, i32 height);
+	Renderer renderer;
-	~Game();
+	Entity hero;
-
-	void init();
-
-	void update(const f32 dt);
-	void render();
-private:
-	Dengine::Shader *shader;
-	Dengine::Renderer *renderer;
-	Dengine::Entity hero;
 };
-}
 
+void worldTraveller_gameInit(GameState *state);
+void worldTraveller_gameUpdateAndRender(GameState *state, const f32 dt);
 #endif