Sprite uses unique vao for rendering

Remove notation of "m" in member variables.

data/shaders/sprite.frag.glsl

@@ -3,9 +3,9 @@ in vec2 texCoord;
 
 out vec4 color;
 
-uniform sampler2D texture;
+uniform sampler2D tex;
 
 void main()
 {
-	color = texture(texture, texCoord);
+	color = texture(tex, texCoord);
 }

src/Shader.cpp

@@ -6,7 +6,7 @@
 namespace Dengine
 {
 Shader::Shader()
-: mProgram(0)
+: program(0)
 {
 }
 
@@ -14,20 +14,20 @@ Shader::~Shader() {}
 
 i32 Shader::loadProgram(GLuint vertexShader, GLuint fragmentShader)
 {
-	mProgram = glCreateProgram();
-	glAttachShader(mProgram, vertexShader);
-	glAttachShader(mProgram, fragmentShader);
-	glLinkProgram(mProgram);
+	this->program = glCreateProgram();
+	glAttachShader(this->program, vertexShader);
+	glAttachShader(this->program, fragmentShader);
+	glLinkProgram(this->program);
 
 	glDeleteShader(fragmentShader);
 	glDeleteShader(vertexShader);
 
 	GLint success;
 	GLchar infoLog[512];
-	glGetProgramiv(mProgram, GL_LINK_STATUS, &success);
+	glGetProgramiv(this->program, GL_LINK_STATUS, &success);
 	if (!success)
 	{
-		glGetProgramInfoLog(mProgram, 512, NULL, infoLog);
+		glGetProgramInfoLog(this->program, 512, NULL, infoLog);
 		std::cout << "glLinkProgram failed: " << infoLog << std::endl;
 		return -1;
 	}
@@ -36,5 +36,5 @@ i32 Shader::loadProgram(GLuint vertexShader, GLuint fragmentShader)
 
 }
 
-void Shader::use() { glUseProgram(mProgram); }
+void Shader::use() { glUseProgram(this->program); }
 }

src/Sprite.cpp

@@ -5,8 +5,8 @@ namespace Dengine
 {
 
 Sprite::Sprite()
-: mPos(0, 0),
-mTex(nullptr)
+: pos(0, 0),
+tex(nullptr)
 {
 }
 
@@ -16,8 +16,8 @@ b32 Sprite::loadSprite(Texture *tex, glm::vec2 pos)
 {
 	if (!tex) return -1;
 	
-	mTex = tex;
-	mPos = pos;
+	this->tex = tex;
+	this->pos = pos;
 
 	// NOTE(doyle): We encode in a vec4 (vec2)pos, (vec2)texCoords
 	glm::vec4 spriteVertex[] = {
@@ -28,21 +28,17 @@ b32 Sprite::loadSprite(Texture *tex, glm::vec2 pos)
 		{-0.5f, -0.5f, 0.0f, 0.0f}, // Bottom left
 	};
 
-	glGenBuffers(1, &mVbo);
-	glBindBuffer(GL_ARRAY_BUFFER, mVbo);
+	/* Create and bind buffers */
+	glGenBuffers(1, &this->vbo);
+	glGenVertexArrays(1, &this->vao);
+	glBindVertexArray(this->vao);
+	glBindBuffer(GL_ARRAY_BUFFER, this->vbo);
+
+	/* Configure VBO */
 	glBufferData(GL_ARRAY_BUFFER, sizeof(spriteVertex), spriteVertex,
 	             GL_DYNAMIC_DRAW);
-	glBindBuffer(GL_ARRAY_BUFFER, 0);
-
-	return 0;
-}
-
-void Sprite::initVertexArrayObject(GLuint vao)
-{
-	// NOTE(doyle): Set the VAO object attributes to match a sprite's
-    // vertex composition
-	glBindVertexArray(vao);
 
+	/* Configure VAO */
 	i32 numElementsInVertex = 4;
 	i32 vertexSize = sizeof(glm::vec4);
 	glEnableVertexAttribArray(0);
@@ -50,26 +46,26 @@ void Sprite::initVertexArrayObject(GLuint vao)
 	                      vertexSize, (GLvoid *)(0));
 
 	/* Unbind */
+	glBindBuffer(GL_ARRAY_BUFFER, 0);
 	glBindVertexArray(0);
 
+	return 0;
 }
 
-void Sprite::render(Shader *shader, GLuint spriteVAO)
+void Sprite::render(Shader *shader)
 {
 	// NOTE(doyle): Associate the VAO with this sprites VBO
-	glBindVertexArray(spriteVAO);
-	glBindBuffer(GL_ARRAY_BUFFER, mVbo);
+	glBindVertexArray(this->vao);
 
 	/* Set texture */
 	glActiveTexture(GL_TEXTURE0);
-	mTex->bind();
-	glUniform1i(glGetUniformLocation(shader->mProgram, "texture"), 0);
+	this->tex->bind();
+	glUniform1i(glGetUniformLocation(shader->program, "tex"), 0);
 
 	/* Render */
 	glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
 
 	// Unbind
-	glBindBuffer(GL_ARRAY_BUFFER, 0);
 	glBindVertexArray(0);
 }
 

src/dengine.cpp

@@ -151,23 +151,21 @@ int main()
 	                                       "wall");
 	if (result) return result;
 
-	result = assetManager.loadTextureImage("data/textures/awesomeface.png"
-	                                       , "awesomeface");
+	result = assetManager.loadTextureImage("data/textures/awesomeface.png",
+	                                       "awesomeface");
 	if (result) return result;
 
 	Dengine::Texture *containerTex = assetManager.getTexture("container");
-	Dengine::Texture *wallTex = assetManager.getTexture("wall");
+	Dengine::Texture *wallTex      = assetManager.getTexture("wall");
+	Dengine::Texture *awesomeTex   = assetManager.getTexture("awesomeface");
+
 	Dengine::Shader *shader = assetManager.getShader("sprite");
-	Dengine::Texture *awesomeTex = assetManager.getTexture("awesomeface");
 
 	f32 deltaTime = 0.0f; // Time between current frame and last frame
 	f32 lastFrame = 0.0f; // Time of last frame
 
-	GLuint spriteVao;
-	glGenVertexArrays(1, &spriteVao);
 	Dengine::Sprite sprite = Dengine::Sprite();
-	sprite.loadSprite(awesomeTex, glm::vec2(0, 0));
-	sprite.initVertexArrayObject(spriteVao);
+	sprite.loadSprite(wallTex, glm::vec2(0, 0));
 
 	/* Main game loop */
 	while (!glfwWindowShouldClose(window))
@@ -189,7 +187,7 @@ int main()
 		shader->use();
 		game.render();
 
-		sprite.render(shader, spriteVao);
+		sprite.render(shader);
 
 		/* Swap the buffers */
 		glfwSwapBuffers(window);

src/include/Dengine/Shader.h

@@ -10,7 +10,7 @@ namespace Dengine
 class Shader
 {
 public:
-	GLuint mProgram;
+	GLuint program;
 
 	Shader();
 	~Shader();

src/include/Dengine/Sprite.h

@@ -15,12 +15,12 @@ public:
 
 	b32 loadSprite(Texture *tex, glm::vec2 pos);
 
-	void initVertexArrayObject(GLuint vao);
-	void render(Shader *shader, GLuint shaderVao);
+	void render(Shader *shader);
 private:
-	glm::vec2 mPos;
-	Texture *mTex;
-	GLuint mVbo;
+	glm::vec2 pos;
+	Texture *tex;
+	GLuint vbo;
+	GLuint vao;
 };
 }