Commit a9fe68d9 authored by Samsara's avatar Samsara
Browse files

Further classes for graphics library skeleton implementation

parent 343e1cf3
/* Camera implementation taken from https://learnopengl.com/Getting-started/Camera */
#ifndef CAMERA_H
#define CAMERA_H
......
/*
Slightly adapted main loop adapted from https://learnopengl.com/Lighting/Materials
Spawns a pre-defined number of "flier" objects and renders them with a sinusoidal
color loop.
*/
#include <glad/glad.h>
#include <GLFW/glfw3.h>
#include "stb_image.h"
#include "shaderClass.h"
#include "cameraClass.h"
#include "modelClass.h"
#include <glm/glm/glm.hpp>
#include <glm/glm/gtc/matrix_transform.hpp>
#include <glm/glm/gtc/type_ptr.hpp>
#include <fstream>
#include <nlohmann/json.hpp>
#include <iostream>
#include <sys/socket.h>
#include <arpa/inet.h>
#define STB_IMAGE_IMPLEMENTATION
void framebuffer_size_callback(GLFWwindow* window, int width, int height);
void mouse_callback(GLFWwindow* window, double xpos, double ypos);
void scroll_callback(GLFWwindow* window, double xoffset, double yoffset);
void processInput(GLFWwindow *window);
// settings
// Specify output window width and height.
const unsigned int SCR_WIDTH = 800;
const unsigned int SCR_HEIGHT = 600;
// camera
// Position camera within scene.
Camera camera(glm::vec3(0.0f, 0.0f, 3.0f));
float lastX = SCR_WIDTH / 2.0f;
float lastY = SCR_HEIGHT / 2.0f;
bool firstMouse = true;
// timing
float deltaTime = 0.0f; // time between current frame and last frame
// Used for render loop.
float deltaTime = 0.0f;
float lastFrame = 0.0f;
// Positions a cube light at a specific position within the scene.
glm::vec3 lightPos(1.2f, 1.0f, 2.0f);
struct FlierFace {
std::string face_name;
float x_loc;
float y_loc;
float pos;
float pipe;
float mountPoint;
float hangDistance;
};
struct FlierMetadata {
std::string name;
std::string text;
std::string category;
std::string department;
std::string year;
};
struct Flier {
int index;
FlierFace face_config;
FlierMetadata metadata;
float rotation;
float tilt;
};
int main()
{
// glfw: initialize and configure
......@@ -78,144 +115,121 @@ int main()
// build and compile our shader zprogram
// ------------------------------------
//Shader ourShader("7.4.camera.vs", "7.4.camera.fs");
std::string vertex_shader = "/Users/samsara/Desktop/Shaders/shader.vert";
std::string vertex_shader = "/Users/samsara/Desktop/Shaders/shader.vert"; //TODO: Replace with local location of shaders
std::string fragment_shader = "/Users/samsara/Desktop/Shaders/shader.frag";
Shader ourShader(vertex_shader.c_str(), fragment_shader.c_str());
Shader lightingShader(vertex_shader.c_str(), fragment_shader.c_str());
//Shader lightingShader("3.1.materials.vs", "3.1.materials.fs");
std::string light_vert_shader = "/Users/samsara/Desktop/Shaders/lightShader.vert"; //TODO: Replace with local location of shaders.
std::string light_frag_shader = "/Users/samsara/Desktop/Shaders/lightShader.frag";
Shader lightCubeShader(light_vert_shader.c_str(), light_frag_shader.c_str());
// set up vertex data (and buffer(s)) and configure vertex attributes
// ------------------------------------------------------------------
float vertices[] = {
-0.5f, -0.5f, -0.5f, 0.0f, 0.0f,
0.5f, -0.5f, -0.5f, 1.0f, 0.0f,
0.5f, 0.5f, -0.5f, 1.0f, 1.0f,
0.5f, 0.5f, -0.5f, 1.0f, 1.0f,
-0.5f, 0.5f, -0.5f, 0.0f, 1.0f,
-0.5f, -0.5f, -0.5f, 0.0f, 0.0f,
-0.5f, -0.5f, 0.5f, 0.0f, 0.0f,
0.5f, -0.5f, 0.5f, 1.0f, 0.0f,
0.5f, 0.5f, 0.5f, 1.0f, 1.0f,
0.5f, 0.5f, 0.5f, 1.0f, 1.0f,
-0.5f, 0.5f, 0.5f, 0.0f, 1.0f,
-0.5f, -0.5f, 0.5f, 0.0f, 0.0f,
-0.5f, 0.5f, 0.5f, 1.0f, 0.0f,
-0.5f, 0.5f, -0.5f, 1.0f, 1.0f,
-0.5f, -0.5f, -0.5f, 0.0f, 1.0f,
-0.5f, -0.5f, -0.5f, 0.0f, 1.0f,
-0.5f, -0.5f, 0.5f, 0.0f, 0.0f,
-0.5f, 0.5f, 0.5f, 1.0f, 0.0f,
0.5f, 0.5f, 0.5f, 1.0f, 0.0f,
0.5f, 0.5f, -0.5f, 1.0f, 1.0f,
0.5f, -0.5f, -0.5f, 0.0f, 1.0f,
0.5f, -0.5f, -0.5f, 0.0f, 1.0f,
0.5f, -0.5f, 0.5f, 0.0f, 0.0f,
0.5f, 0.5f, 0.5f, 1.0f, 0.0f,
-0.5f, -0.5f, -0.5f, 0.0f, 1.0f,
0.5f, -0.5f, -0.5f, 1.0f, 1.0f,
0.5f, -0.5f, 0.5f, 1.0f, 0.0f,
0.5f, -0.5f, 0.5f, 1.0f, 0.0f,
-0.5f, -0.5f, 0.5f, 0.0f, 0.0f,
-0.5f, -0.5f, -0.5f, 0.0f, 1.0f,
-0.5f, 0.5f, -0.5f, 0.0f, 1.0f,
0.5f, 0.5f, -0.5f, 1.0f, 1.0f,
0.5f, 0.5f, 0.5f, 1.0f, 0.0f,
0.5f, 0.5f, 0.5f, 1.0f, 0.0f,
-0.5f, 0.5f, 0.5f, 0.0f, 0.0f,
-0.5f, 0.5f, -0.5f, 0.0f, 1.0f
};
// world space positions of our cubes
glm::vec3 cubePositions[] = {
glm::vec3( 0.0f, 0.0f, 0.0f),
glm::vec3( 2.0f, 5.0f, -15.0f),
glm::vec3(-1.5f, -2.2f, -2.5f),
glm::vec3(-3.8f, -2.0f, -12.3f),
glm::vec3( 2.4f, -0.4f, -3.5f),
glm::vec3(-1.7f, 3.0f, -7.5f),
glm::vec3( 1.3f, -2.0f, -2.5f),
glm::vec3( 1.5f, 2.0f, -2.5f),
glm::vec3( 1.5f, 0.2f, -1.5f),
glm::vec3(-1.3f, 1.0f, -1.5f)
//Defines vertex point for two triangles that meet at a top point.
float flier[] = {
-0.5f, -0.5f, -0.5f, 0.0f, 0.0f, -1.0f,
0.5f, -0.5f, -0.5f, 0.0f, 0.0f, -1.0f,
0.5f, 0.5f, -0.5f, 0.0f, 0.0f, -1.0f,
0.5f, 0.5f, -0.5f, 0.0f, 0.0f, -1.0f,
-0.5f, -0.5f, 0.5f, 0.0f, 0.0f, 1.0f,
0.5f, -0.5f, 0.5f, 0.0f, 0.0f, 1.0f,
0.5f, 0.5f, 0.5f, 0.0f, 0.0f, 1.0f,
0.5f, 0.5f, 0.5f, 0.0f, 0.0f, 1.0f,
};
unsigned int VBO, VAO;
glGenVertexArrays(1, &VAO);
glGenBuffers(1, &VBO);
glBindVertexArray(VAO);
glBindBuffer(GL_ARRAY_BUFFER, VBO);
glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW);
//Defines a cube shape for a light source.
float light[] = {
-0.5f, -0.5f, -0.5f, 0.0f, 0.0f, -1.0f,
0.5f, -0.5f, -0.5f, 0.0f, 0.0f, -1.0f,
0.5f, 0.5f, -0.5f, 0.0f, 0.0f, -1.0f,
0.5f, 0.5f, -0.5f, 0.0f, 0.0f, -1.0f,
-0.5f, 0.5f, -0.5f, 0.0f, 0.0f, -1.0f,
-0.5f, -0.5f, -0.5f, 0.0f, 0.0f, -1.0f,
-0.5f, -0.5f, 0.5f, 0.0f, 0.0f, 1.0f,
0.5f, -0.5f, 0.5f, 0.0f, 0.0f, 1.0f,
0.5f, 0.5f, 0.5f, 0.0f, 0.0f, 1.0f,
0.5f, 0.5f, 0.5f, 0.0f, 0.0f, 1.0f,
-0.5f, 0.5f, 0.5f, 0.0f, 0.0f, 1.0f,
-0.5f, -0.5f, 0.5f, 0.0f, 0.0f, 1.0f,
-0.5f, 0.5f, 0.5f, -1.0f, 0.0f, 0.0f,
-0.5f, 0.5f, -0.5f, -1.0f, 0.0f, 0.0f,
-0.5f, -0.5f, -0.5f, -1.0f, 0.0f, 0.0f,
-0.5f, -0.5f, -0.5f, -1.0f, 0.0f, 0.0f,
-0.5f, -0.5f, 0.5f, -1.0f, 0.0f, 0.0f,
-0.5f, 0.5f, 0.5f, -1.0f, 0.0f, 0.0f,
0.5f, 0.5f, 0.5f, 1.0f, 0.0f, 0.0f,
0.5f, 0.5f, -0.5f, 1.0f, 0.0f, 0.0f,
0.5f, -0.5f, -0.5f, 1.0f, 0.0f, 0.0f,
0.5f, -0.5f, -0.5f, 1.0f, 0.0f, 0.0f,
0.5f, -0.5f, 0.5f, 1.0f, 0.0f, 0.0f,
0.5f, 0.5f, 0.5f, 1.0f, 0.0f, 0.0f,
-0.5f, -0.5f, -0.5f, 0.0f, -1.0f, 0.0f,
0.5f, -0.5f, -0.5f, 0.0f, -1.0f, 0.0f,
0.5f, -0.5f, 0.5f, 0.0f, -1.0f, 0.0f,
0.5f, -0.5f, 0.5f, 0.0f, -1.0f, 0.0f,
-0.5f, -0.5f, 0.5f, 0.0f, -1.0f, 0.0f,
-0.5f, -0.5f, -0.5f, 0.0f, -1.0f, 0.0f,
-0.5f, 0.5f, -0.5f, 0.0f, 1.0f, 0.0f,
0.5f, 0.5f, -0.5f, 0.0f, 1.0f, 0.0f,
0.5f, 0.5f, 0.5f, 0.0f, 1.0f, 0.0f,
0.5f, 0.5f, 0.5f, 0.0f, 1.0f, 0.0f,
-0.5f, 0.5f, 0.5f, 0.0f, 1.0f, 0.0f,
-0.5f, 0.5f, -0.5f, 0.0f, 1.0f, 0.0f
glm::vec3 cubePositions[] = { //TODO: Change based on the flier configuration.
glm::vec3( 0.0f, 0.0f, 0.0f),
glm::vec3( 2.0f, 5.0f, -15.0f),
glm::vec3(-1.5f, -2.2f, -2.5f),
glm::vec3(-3.8f, -2.0f, -12.3f),
glm::vec3( 2.4f, -0.4f, -3.5f),
glm::vec3(-1.7f, 3.0f, -7.5f),
glm::vec3( 1.3f, -2.0f, -2.5f),
glm::vec3( 1.5f, 2.0f, -2.5f),
glm::vec3( 1.5f, 0.2f, -1.5f),
glm::vec3(-1.3f, 1.0f, -1.5f)
};
// Configures the flier's vertex array object and vertex buffer object
unsigned int FlierVBO, flierVAO;
glGenVertexArrays(1, &flierVAO);
glGenBuffers(1, &FlierVBO);
glBindBuffer(GL_ARRAY_BUFFER, FlierVBO);
glBufferData(GL_ARRAY_BUFFER, sizeof(flier), flier, GL_STATIC_DRAW);
glBindVertexArray(flierVAO);
// position attribute
glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 5 * sizeof(float), (void*)0);
glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 6 * sizeof(float), (void*)0);
glEnableVertexAttribArray(0);
// texture coord attribute
glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, 5 * sizeof(float), (void*)(3 * sizeof(float)));
// normal attribute
glVertexAttribPointer(1, 3, GL_FLOAT, GL_FALSE, 6 * sizeof(float), (void*)(3 * sizeof(float)));
glEnableVertexAttribArray(1);
// load and create a texture
// -------------------------
unsigned int texture1, texture2;
// texture 1
// ---------
glGenTextures(1, &texture1);
glBindTexture(GL_TEXTURE_2D, texture1);
// set the texture wrapping parameters
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
// set texture filtering parameters
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
// load image, create texture and generate mipmaps
int width, height, nrChannels;
stbi_set_flip_vertically_on_load(true); // tell stb_image.h to flip loaded texture's on the y-axis.
std::string container_name = "/Users/samsara/Desktop/Textures/container.jpg";
unsigned char *data = stbi_load(container_name.c_str(), &width, &height, &nrChannels, 0);
if (data)
{
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, width, height, 0, GL_RGB, GL_UNSIGNED_BYTE, data);
glGenerateMipmap(GL_TEXTURE_2D);
}
else
{
std::cout << "Failed to load texture" << std::endl;
}
stbi_image_free(data);
// texture 2
// ---------
glGenTextures(1, &texture2);
glBindTexture(GL_TEXTURE_2D, texture2);
// set the texture wrapping parameters
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
// set texture filtering parameters
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
// load image, create texture and generate mipmaps
std::string face_name = "/Users/Samsara/Desktop/Textures/awesomeface.png";
data = stbi_load(face_name.c_str(), &width, &height, &nrChannels, 0);
if (data)
{
// note that the awesomeface.png has transparency and thus an alpha channel, so make sure to tell OpenGL the data type is of GL_RGBA
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE, data);
glGenerateMipmap(GL_TEXTURE_2D);
}
else
{
std::cout << "Failed to load texture" << std::endl;
}
stbi_image_free(data);
// tell opengl for each sampler to which texture unit it belongs to (only has to be done once)
// -------------------------------------------------------------------------------------------
ourShader.use();
ourShader.setInt("texture1", 0);
ourShader.setInt("texture2", 1);
//Configure's light cube's vertex array object and vertex buffer object
unsigned int CubeVBO, lightCubeVAO;
glGenVertexArrays(1, &lightCubeVAO);
glGenBuffers(1, &CubeVBO);
glBindBuffer(GL_ARRAY_BUFFER, CubeVBO);
glBufferData(GL_ARRAY_BUFFER, sizeof(light), light, GL_STATIC_DRAW);
glBindVertexArray(lightCubeVAO);
glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 6 * sizeof(float), (void*)0);
glEnableVertexAttribArray(0);
// render loop
......@@ -234,40 +248,64 @@ int main()
// render
// ------
glClearColor(0.2f, 0.3f, 0.3f, 1.0f);
glClearColor(0.1f, 0.1f, 0.1f, 1.0f);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
// bind textures on corresponding texture units
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, texture1);
glActiveTexture(GL_TEXTURE1);
glBindTexture(GL_TEXTURE_2D, texture2);
// activate shader
ourShader.use();
// pass projection matrix to shader (note that in this case it could change every frame)
// be sure to activate shader when setting uniforms/drawing objects
lightingShader.use();
lightingShader.setVec3("light.position", lightPos);
lightingShader.setVec3("viewPos", camera.Position);
// light properties
glm::vec3 lightColor;
lightColor.x = sin(glfwGetTime() * 2.0f);
lightColor.y = sin(glfwGetTime() * 0.7f);
lightColor.z = sin(glfwGetTime() * 1.3f);
glm::vec3 diffuseColor = lightColor * glm::vec3(0.5f); // decrease the influence
glm::vec3 ambientColor = diffuseColor * glm::vec3(0.2f); // low influence
lightingShader.setVec3("light.ambient", ambientColor);
lightingShader.setVec3("light.diffuse", diffuseColor);
lightingShader.setVec3("light.specular", 1.0f, 1.0f, 1.0f);
// material properties
lightingShader.setVec3("material.ambient", 1.0f, 0.5f, 0.31f);
lightingShader.setVec3("material.diffuse", 1.0f, 0.5f, 0.31f);
lightingShader.setVec3("material.specular", 0.5f, 0.5f, 0.5f); // specular lighting doesn't have full effect on this object's material
lightingShader.setFloat("material.shininess", 32.0f);
// view/projection transformations
glm::mat4 projection = glm::perspective(glm::radians(camera.Zoom), (float)SCR_WIDTH / (float)SCR_HEIGHT, 0.1f, 100.0f);
ourShader.setMat4("projection", projection);
// camera/view transformation
glm::mat4 view = camera.GetViewMatrix();
ourShader.setMat4("view", view);
// render boxes
glBindVertexArray(VAO);
for (unsigned int i = 0; i < 10; i++)
{
// calculate the model matrix for each object and pass it to shader before drawing
glm::mat4 model = glm::mat4(1.0f); // make sure to initialize matrix to identity matrix first
model = glm::translate(model, cubePositions[i]);
float angle = 20.0f * i;
model = glm::rotate(model, glm::radians(angle), glm::vec3(1.0f, 0.3f, 0.5f));
ourShader.setMat4("model", model);
lightingShader.setMat4("projection", projection);
lightingShader.setMat4("view", view);
// world transformation
for (int i = 0; i < 10; i++) {
glm::mat4 object_model = glm::mat4(1.0f);
object_model = glm::translate(object_model, cubePositions[i]);
float angle = 20.0f * i;
object_model = glm::rotate(object_model, glm::radians(angle), glm::vec3(1.0f, 0.3f, 0.5f));
lightingShader.setMat4("model", object_model);
// render the cube
glBindVertexArray(flierVAO);
glDrawArrays(GL_TRIANGLES, 0, 36);
}
// also draw the lamp object
lightCubeShader.use();
lightCubeShader.setMat4("projection", projection);
lightCubeShader.setMat4("view", view);
glm::mat4 light_model = glm::mat4(1.0f);
light_model = glm::mat4(1.0f);
light_model = glm::translate(light_model, lightPos);
light_model = glm::scale(light_model, glm::vec3(0.2f)); // a smaller cube
lightCubeShader.setMat4("model", light_model);
glBindVertexArray(lightCubeVAO);
glDrawArrays(GL_TRIANGLES, 0, 36);
// glfw: swap buffers and poll IO events (keys pressed/released, mouse moved etc.)
// -------------------------------------------------------------------------------
glfwSwapBuffers(window);
......@@ -276,8 +314,11 @@ int main()
// optional: de-allocate all resources once they've outlived their purpose:
// ------------------------------------------------------------------------
glDeleteVertexArrays(1, &VAO);
glDeleteBuffers(1, &VBO);
glDeleteVertexArrays(1, &flierVAO);
glDeleteVertexArrays(1, &lightCubeVAO);
glDeleteBuffers(1, &FlierVBO);
glDeleteBuffers(1, &CubeVBO);
// glfw: terminate, clearing all previously allocated GLFW resources.
// ------------------------------------------------------------------
......@@ -287,6 +328,7 @@ int main()
// process all input: query GLFW whether relevant keys are pressed/released this frame and react accordingly
// ---------------------------------------------------------------------------------------------------------
void processInput(GLFWwindow *window)
{
if (glfwGetKey(window, GLFW_KEY_ESCAPE) == GLFW_PRESS)
......@@ -338,3 +380,7 @@ void scroll_callback(GLFWwindow* window, double xoffset, double yoffset)
{
camera.ProcessMouseScroll(yoffset);
}
/* Slightly modified mesh class implementation taken from https://learnopengl.com/Model-Loading/Mesh. Mesh objects exist under model objects, and process inputted 3D graphics per-node and per-face. */
#ifndef MESH_H
#define MESH_H
#include <glad/glad.h> // holds all OpenGL type declarations
#include <glm/glm/glm.hpp>
#include <glm/glm/gtc/matrix_transform.hpp>
#include "shaderClass.h"
#include <string>
#include <vector>
using namespace std;
struct Vertex {
// position
glm::vec3 Position;
// normal
glm::vec3 Normal;
// texCoords
glm::vec2 TexCoords;
// tangent
glm::vec3 Tangent;
// bitangent
glm::vec3 Bitangent;
};
struct Texture {
unsigned int id;
string type;
string path;
};
class Mesh {
public:
// mesh Data
vector<Vertex> vertices;
vector<unsigned int> indices;
vector<Texture> textures;
unsigned int VAO;
// constructor
Mesh(vector<Vertex> vertices, vector<unsigned int> indices, vector<Texture> textures)
{
this->vertices = vertices;
this->indices = indices;
this->textures = textures;
// now that we have all the required data, set the vertex buffers and its attribute pointers.
setupMesh();
}
// render the mesh
void Draw(Shader &shader)
{
// bind appropriate textures
unsigned int diffuseNr = 1;
unsigned int specularNr = 1;
unsigned int normalNr = 1;
unsigned int heightNr = 1;
for(unsigned int i = 0; i < textures.size(); i++)
{
glActiveTexture(GL_TEXTURE0 + i); // active proper texture unit before binding
// retrieve texture number (the N in diffuse_textureN)
string number;
string name = textures[i].type;
if(name == "texture_diffuse")
number = std::to_string(diffuseNr++);
else if(name == "texture_specular")
number = std::to_string(specularNr++); // transfer unsigned int to stream
else if(name == "texture_normal")
number = std::to_string(normalNr++); // transfer unsigned int to stream
else if(name == "texture_height")
number = std::to_string(heightNr++); // transfer unsigned int to stream
// now set the sampler to the correct texture unit
glUniform1i(glGetUniformLocation(shader.ID, (name + number).c_str()), i);
// and finally bind the texture
glBindTexture(GL_TEXTURE_2D, textures[i].id);
}
// draw mesh
glBindVertexArray(VAO);
glDrawElements(GL_TRIANGLES, indices.size(), GL_UNSIGNED_INT, 0);
glBindVertexArray(0);
// always good practice to set everything back to defaults once configured.
glActiveTexture(GL_TEXTURE0);
}
private:
// render data
unsigned int VBO, EBO;
// initializes all the buffer objects/arrays
void setupMesh()
{
// create buffers/arrays
glGenVertexArrays(1, &VAO);
glGenBuffers(1, &VBO);
glGenBuffers(1, &EBO);
glBindVertexArray(VAO);