skybox prototype working, shaders now take a source instead of a filename in constructor

camera.h

@@ -23,7 +23,7 @@ class Camera
     void computeViewMatrix();
 public:
     //constructor
-    Camera(int width = 800, int height = 600, float fov_y = 45, float near = 0.1f, float far = 20, glm::vec3 pos = glm::vec3());
+    Camera(int width = 800, int height = 600, float fov_y = 45, float near = 0.1f, float far = 10.0f, glm::vec3 pos = glm::vec3());
 
     // setters
     // relative:

entity.cpp

@@ -0,0 +1,18 @@
+#include "entity.h"
+#include "shader.h"
+#include <glm/glm.hpp>
+#include "material.h"
+#include "mesh.h"
+
+void Entity::draw(const glm::mat4 viewMatrix, const glm::mat4 projectionMatrix)
+{
+    glm::mat4 modelViewMatrix = viewMatrix * modelMatrix;
+    glm::mat4 mvp = projectionMatrix * modelViewMatrix;
+    Shader* shader = mat->getShader();
+    shader->bind();
+    mat->bindAttributes();
+    shader->bindMatrix(shader->getLocation("viewMatrix"), viewMatrix);
+    shader->bindMatrix(shader->getLocation("modelViewMatrix"), modelViewMatrix);
+    shader->bindMatrix(shader->getLocation("MVP"), mvp);
+    mesh->draw();
+}

entity.h

@@ -0,0 +1,21 @@
+#ifndef ENTITY_H
+#define ENTITY_H
+
+#include "glm/mat4x4.hpp"
+
+class Mesh;
+class Material;
+
+class Entity
+{
+protected:
+    Entity* parent;
+    Mesh* mesh;
+    Material* mat;
+    glm::mat4 modelMatrix;
+public:
+    Entity(Entity* myParent, Mesh* myMesh, Material* myMat) : parent(myParent), mesh(myMesh), mat(myMat) {}
+    virtual void draw(const glm::mat4 viewMatrix, const glm::mat4 projectionMatrix);
+};
+
+#endif // ENTITY_H

mesh.cpp

@@ -66,10 +66,7 @@ void Mesh::destroyGL()
     {
         locked = false;
         glAssert(glDeleteVertexArrays(1, &vao));
-        vao = 0;
         glAssert(glDeleteBuffers(2, vbo));
-        vbo[0] = 0;
-        vbo[1] = 0;
     }
 }
 

myglwidget.cpp

@@ -5,6 +5,8 @@
 #include "camera.h"
 #include "sphere.h"
 #include "phongmaterial.h"
+#include "skybox.h"
+#include "utils.h"
 #include <iostream>
 #include <glm/glm.hpp>
 #include <QKeyEvent>
@@ -61,8 +63,17 @@ void MyGLWidget::buildScene()
     scene->setCamera(cam);
     Mesh* myGrid = new Sphere(2);
     myGrid->initGL();
-    Shader* shader = new Shader(QString("../phong.vert"), QString("../phong.frag"));
+    QString vertSource = Utils::fileToString("../phong.vert");
+    QString fragSource = Utils::fileToString("../phong.frag");
+    Shader* shader = new Shader(&vertSource, &fragSource);
     Material* mat = new PhongMaterial(shader);
+    QString filenames[6] = {
+        "../data/skybox_lf", "../data/skybox_rt",
+        "../data/skybox_up", "../data/skybox_dn",
+        "../data/skybox_bk", "../data/skybox_ft"
+    };
+    SkyBox* skybox = new SkyBox(filenames);
+    scene->addEntity(skybox);
     scene->addEntity(myGrid, mat);
 }
 

phong.frag

@@ -1,4 +1,4 @@
-#version 330
+#version 330 core
 
 // material
 uniform vec3 materialKd;

phong.vert

@@ -1,4 +1,4 @@
-#version 330
+#version 330 core
 
 // Matrices
 uniform mat4 modelViewMatrix;

scene.cpp

@@ -3,11 +3,7 @@
 #include <glm/glm.hpp>
 #include <glm/ext.hpp>
 #include "camera.h"
-
+#include "entity.h"
-Scene::Scene()
-{
-
-}
 
 Scene::~Scene()
 {
@@ -15,27 +11,27 @@ Scene::~Scene()
         delete(e);
 }
 
+void Scene::addEntity(Entity* parent, Mesh* mesh, Material* mat)
+{
+    entities.push_back(new Entity(parent, mesh, mat));
+}
+
 void Scene::addEntity(Mesh* mesh, Material* mat)
 {
     entities.push_back(new Entity(NULL, mesh, mat));
 }
 
+void Scene::addEntity(Entity* entity)
+{
+    entities.push_back(entity);
+}
+
 void Scene::drawEntities()
 {
     glm::mat4 viewMatrix = camera->getViewMatrix();
     glm::mat4 projectionMatrix = camera->getProjectionMatrix();
     for(Entity* e : entities)
-    {
+        e->draw(viewMatrix, projectionMatrix);
-        glm::mat4 modelViewMatrix = viewMatrix * e->modelMatrix;
-        glm::mat4 mvp = projectionMatrix * modelViewMatrix;
-        Shader* shader = e->mat->getShader();
-        shader->bind();
-        e->mat->bindAttributes();
-        shader->bindMatrix(shader->getLocation("viewMatrix"), viewMatrix);
-        shader->bindMatrix(shader->getLocation("modelViewMatrix"), modelViewMatrix);
-        shader->bindMatrix(shader->getLocation("MVP"), mvp);
-        e->mesh->draw();
-    }
 }
 
 void Scene::setCamera(Camera* myCamera)

scene.h

@@ -5,31 +5,20 @@
 #include "material.h"
 #include <glew/glew.h>
 
+class Entity;
 class Camera;
 
 class Scene
 {
-    typedef struct s_entity
-    {
-        Material* mat;
-        Mesh* mesh;
-        s_entity* parent;
-        glm::mat4 modelMatrix;
-        s_entity(s_entity* myParent, Mesh* myMesh, Material* myMat)
-        {
-            parent = myParent;
-            mesh = myMesh;
-            mat = myMat;
-        }
-    } Entity;
-
     // lights
    std::vector<Entity*> entities;
    Camera* camera;
 public:
-    Scene();
+    Scene() : camera(NULL) {}
     ~Scene();
+    void addEntity(Entity* parent, Mesh* mesh, Material* mat);
     void addEntity(Mesh* mesh, Material* mat);
+    void addEntity(Entity* entity);
     void drawEntities();
     void setCamera(Camera* myCamera);
     Camera* getCamera();

scenecontroller.cpp

@@ -17,7 +17,7 @@ void SceneController::mouseMove(int dx, int dy)
         break;
     case 2:
         camera->translate(glm::vec3(dx*0.01f, dy*0.01f, 0));
-        camera->lookAt(glm::vec3(0, 0, 0));
+        //camera->lookAt(glm::vec3(0, 0, 0));
         break;
     default:
         break;

shader.cpp

@@ -1,7 +1,5 @@
 #include "shader.h"
 #include <glew/glew.h>
-#include <QFile>
-#include <QTextStream>
 #include <iostream>
 #include "glassert.h"
 #include <glm/ext.hpp>
@@ -9,14 +7,12 @@
 const std::string Shader::DEFAULT_VERT = "#version 330\nlayout(location = 0)in vec3 inPosition;\nvoid main(){gl_Position = vec4(inPosition, 1.0);}";
 const std::string Shader::DEFAULT_FRAG = "#version 330\nlayout(location = 0)out vec4 outColor;\nvoid main(){outColor = vec4(1, 0, 0, 1);}";
 
-Shader::Shader(const QString &vertFilename, const QString &fragFilename)
+Shader::Shader(const QString* vertexSource, const QString* fragmentSource)
 {
     program = glAssert(glCreateProgram());
 
-    vertexSource = fileToString(vertFilename);
+    GLuint vertexShaderId = createShader(vertexSource, GL_VERTEX_SHADER);
-    fragmentSource = fileToString(fragFilename);
+    GLuint fragmentShaderId = createShader(fragmentSource, GL_FRAGMENT_SHADER);
-    GLuint vertexShaderId = createShader(&vertexSource, GL_VERTEX_SHADER);
-    GLuint fragmentShaderId = createShader(&fragmentSource, GL_FRAGMENT_SHADER);
 
     glAssert(glAttachShader(program, vertexShaderId));
     glAssert(glAttachShader(program, fragmentShaderId));
@@ -52,17 +48,7 @@ Shader::~Shader()
         glAssert(glDeleteProgram(program));
 }
 
-
+GLuint Shader::createShader(const QString* source, GLenum shaderType)
-QString Shader::fileToString(QString filename)
-{
-    QFile f(filename);
-    if(!f.open(QFile::ReadOnly | QFile::Text))
-        return NULL;
-    QTextStream in(&f);
-    return in.readAll();
-}
-
-GLuint Shader::createShader(QString* source, GLenum shaderType)
 {
     glAssert(GLuint shaderId = glCreateShader(shaderType));
     const GLchar *data = (const GLchar *)source->toStdString().c_str();

shader.h

@@ -11,15 +11,12 @@ class Shader
     static const std::string DEFAULT_VERT;
     static const std::string DEFAULT_FRAG;
     GLuint program;
-    QString vertexSource;
+    GLuint createShader(const QString* filename, GLenum shaderType);
-    QString fragmentSource;
-    QString fileToString(QString filename);
-    GLuint createShader(QString* filename, GLenum shaderType);
     void printShaderInfoLog(GLuint shaderId);
     void printProgramInfoLog(GLuint programId);
 
 public:
-    Shader(const QString &vertFilename, const QString &fragFilename);
+    Shader(const QString* vertexSource, const QString* fragmentSource);
     ~Shader();
     GLuint getLocation(std::string attribName);
 

skybox.cpp

@@ -0,0 +1,107 @@
+#include "skybox.h"
+#include "glassert.h"
+#include "shader.h"
+#include "material.h"
+#include "skyboxmaterial.h"
+#include "glm/glm.hpp"
+
+SkyBox::SkyBox(const QString filename[6]) : Entity(NULL, NULL, NULL)
+{
+    Shader* shader = new Shader(&vertSource, &fragSource);
+    mat = new SkyBoxMaterial(shader, filename);
+
+    // set up vao
+    glAssert(glGenVertexArrays(1, &vao));
+    glAssert(glBindVertexArray(vao));
+    glAssert(glGenBuffers(1, &vbo));
+    glAssert(glBindBuffer(GL_ARRAY_BUFFER, vbo));
+    glAssert(glBufferData(GL_ARRAY_BUFFER, 108 * sizeof(GLfloat), skyboxVertices, GL_STATIC_DRAW));
+    glAssert(glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, sizeof(float)*3, NULL));
+    glAssert(glEnableVertexAttribArray(0));
+    glAssert(glBindVertexArray(0));
+}
+
+SkyBox::~SkyBox()
+{
+    glAssert(glDeleteVertexArrays(1, &vao));
+    glAssert(glDeleteBuffers(1, &vbo));
+}
+
+void SkyBox::draw(const glm::mat4 viewMatrix, const glm::mat4 projectionMatrix)
+{
+    glm::mat4 mvp = glm::mat4(glm::mat3(projectionMatrix * viewMatrix));
+    Shader* shader = mat->getShader();
+    glAssert(glDepthMask(GL_FALSE));
+    shader->bind();
+    mat->bindAttributes();
+    shader->bindMatrix(shader->getLocation("MVP"), mvp);
+    glAssert(glBindVertexArray(vao));
+    glAssert(glDrawArrays(GL_TRIANGLES, 0, 36));
+    glAssert(glDepthMask(GL_TRUE));
+}
+
+const GLfloat SkyBox::skyboxVertices[] = {
+    // Positions
+    -1.0f,  1.0f, -1.0f,
+    -1.0f, -1.0f, -1.0f,
+     1.0f, -1.0f, -1.0f,
+     1.0f, -1.0f, -1.0f,
+     1.0f,  1.0f, -1.0f,
+    -1.0f,  1.0f, -1.0f,
+
+    -1.0f, -1.0f,  1.0f,
+    -1.0f, -1.0f, -1.0f,
+    -1.0f,  1.0f, -1.0f,
+    -1.0f,  1.0f, -1.0f,
+    -1.0f,  1.0f,  1.0f,
+    -1.0f, -1.0f,  1.0f,
+
+     1.0f, -1.0f, -1.0f,
+     1.0f, -1.0f,  1.0f,
+     1.0f,  1.0f,  1.0f,
+     1.0f,  1.0f,  1.0f,
+     1.0f,  1.0f, -1.0f,
+     1.0f, -1.0f, -1.0f,
+
+    -1.0f, -1.0f,  1.0f,
+    -1.0f,  1.0f,  1.0f,
+     1.0f,  1.0f,  1.0f,
+     1.0f,  1.0f,  1.0f,
+     1.0f, -1.0f,  1.0f,
+    -1.0f, -1.0f,  1.0f,
+
+    -1.0f,  1.0f, -1.0f,
+     1.0f,  1.0f, -1.0f,
+     1.0f,  1.0f,  1.0f,
+     1.0f,  1.0f,  1.0f,
+    -1.0f,  1.0f,  1.0f,
+    -1.0f,  1.0f, -1.0f,
+
+    -1.0f, -1.0f, -1.0f,
+    -1.0f, -1.0f,  1.0f,
+     1.0f, -1.0f, -1.0f,
+     1.0f, -1.0f, -1.0f,
+    -1.0f, -1.0f,  1.0f,
+     1.0f, -1.0f,  1.0f
+};
+
+const QString SkyBox::vertSource =
+        "#version 330 core\n\
+        layout(location = 0)in vec3 inPosition;\n\
+        out vec3 varTexCoord;\n\
+        uniform mat4 MVP;\n\
+        void main()\n\
+        {\n\
+            gl_Position = MVP * vec4(inPosition, 1.0);\n\
+            varTexCoord = inPosition;\n\
+        }\n";
+
+const QString SkyBox::fragSource =
+        "#version 330 core\n\
+        in vec3 varTexCoord;\n\
+        out vec4 outColor;\n\
+        uniform samplerCube skybox;\n\
+        void main()\n\
+        {\n\
+            outColor = texture(skybox, varTexCoord);\n\
+        }\n";

skybox.h

@@ -0,0 +1,23 @@
+#ifndef SKYBOX_H
+#define SKYBOX_H
+
+#include "entity.h"
+#include <glew/glew.h>
+
+class QString;
+
+class SkyBox : public Entity
+{
+private:
+    static const GLfloat skyboxVertices[];
+    static const QString vertSource;
+    static const QString fragSource;
+    GLuint vao;
+    GLuint vbo;
+public:
+    SkyBox(const QString filename[6]);
+    ~SkyBox();
+    virtual void draw(const glm::mat4 viewMatrix, const glm::mat4 projectionMatrix);
+};
+
+#endif // SKYBOX_H

skyboxmaterial.cpp

@@ -1,47 +1,12 @@
 #include "skyboxmaterial.h"
 #include "texture.h"
 
+SkyBoxMaterial::SkyBoxMaterial(Shader* myShader, const QString filenames[6]) : Material(myShader)
+{
+    skyboxTex = new Texture(filenames);
+}
+
 void SkyBoxMaterial::bindAttributes()
 {
-    for(int i=0; i<NB_TEXTURES; ++i)
+    skyboxTex->bind(0);
-    {
-        if(skyboxTex[i] != NULL)
-        {
-            skyboxTex[i]->bind(i);
-            shader->bindTexture(shader->getLocation("skybox_" + getDirName((DirEnum)i)), i);
-        }
-    }
-}
-
-void SkyBoxMaterial::setTexture(Texture* myTexture, DirEnum direction)
-{
-    skyboxTex[direction] = myTexture;
-}
-
-std::string SkyBoxMaterial::getDirName(DirEnum direction)
-{
-    switch(direction)
-    {
-    case TOP:
-        return "top";
-        break;
-    case BOTTOM:
-        return "bottom";
-        break;
-    case LEFT:
-        return "left";
-        break;
-    case RIGHT:
-        return "right";
-        break;
-    case FRONT:
-        return "front";
-        break;
-    case BACK:
-        return "back";
-        break;
-    default:
-        return "undefined";
-        break;
-    }
 }

skyboxmaterial.h

@@ -8,15 +8,11 @@ class Texture;
 class SkyBoxMaterial : public Material
 {
 public:
-    typedef enum {TOP, BOTTOM, LEFT, RIGHT, FRONT, BACK, NB_TEXTURES} DirEnum;
+    SkyBoxMaterial(Shader* myShader, const QString filenames[6]);
-
-    SkyBoxMaterial(Shader* myShader) : Material(myShader) {}
     virtual void bindAttributes();
-    void setTexture(Texture* myTexture, DirEnum direction);
-    std::string getDirName(DirEnum direction);
 
 private:
-    Texture* skyboxTex[NB_TEXTURES];
+    Texture* skyboxTex;
 };
 
 #endif // SKYBOXMATERIAL_H

sparrowRenderer.pro

@@ -31,7 +31,10 @@ SOURCES += main.cpp\
     phongmaterial.cpp \
     scenecontroller.cpp \
     sphere.cpp \
-    skyboxmaterial.cpp
+    skyboxmaterial.cpp \
+    skybox.cpp \
+    entity.cpp \
+    utils.cpp
 
 HEADERS += mainwindow.h \
     myglwidget.h \
@@ -46,7 +49,10 @@ HEADERS += mainwindow.h \
     phongmaterial.h \
     scenecontroller.h \
     sphere.h \
-    skyboxmaterial.h
+    skyboxmaterial.h \
+    skybox.h \
+    entity.h \
+    utils.h
 
 FORMS   += mainwindow.ui
 

texture.cpp

@@ -2,20 +2,28 @@
 #include "glassert.h"
 #include <QImage>
 
-Texture::Texture(QString filename)
+Texture::Texture(const QString filename) : type(GL_TEXTURE_2D)
 {
-    img = new QImage(filename);
-
-    int bpp = (img->depth() == 32) ? GL_RGBA : GL_RGB;
-    int format = (img->depth() == 32) ? GL_BGRA : GL_BGR;
-
     glAssert(glGenTextures(1, &texId));
-    glAssert(glBindTexture(GL_TEXTURE_2D, texId));
+    glAssert(glBindTexture(type, texId));
-    glAssert(glTexImage2D(GL_TEXTURE_2D, 0, bpp, img->width(), img->height(), 0, format, GL_UNSIGNED_BYTE, img->bits()));
+
-    glAssert(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT));
+    createTexture(filename, GL_TEXTURE_2D);
-    glAssert(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT));
+    setWrap(GL_REPEAT);
-    glAssert(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST));
+    setFiltering(GL_NEAREST);
-    glAssert(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST));
+}
+
+Texture::Texture(const QString filename[6]) : type(GL_TEXTURE_CUBE_MAP)
+{
+    glAssert(glActiveTexture(GL_TEXTURE0));
+    glAssert(glGenTextures(1, &texId));
+    glAssert(glBindTexture(type, texId));
+
+    for(int i=0; i<6; ++i)
+    {
+        createTexture(filename[i], GL_TEXTURE_CUBE_MAP_POSITIVE_X + i);
+        setWrap(GL_CLAMP_TO_EDGE);
+        setFiltering(GL_LINEAR);
+    }
 }
 
 Texture::~Texture()
@@ -23,10 +31,31 @@ Texture::~Texture()
     glAssert(glDeleteTextures(1, &texId));
 }
 
+void Texture::createTexture(QString filename, GLenum textureSlot)
+{
+    QImage img(filename);
+    int bpp = (img.depth() == 32) ? GL_RGBA : GL_RGB;
+    int format = (img.depth() == 32) ? GL_BGRA : GL_BGR;
+    glAssert(glTexImage2D(textureSlot, 0, bpp, img.width(), img.height(), 0, format, GL_UNSIGNED_BYTE, img.bits()));
+}
+
+void Texture::setWrap(GLint wrap)
+{
+    glAssert(glTexParameteri(type, GL_TEXTURE_WRAP_S, wrap));
+    glAssert(glTexParameteri(type, GL_TEXTURE_WRAP_T, wrap));
+    glAssert(glTexParameteri(type, GL_TEXTURE_WRAP_R, wrap));
+}
+
+void Texture::setFiltering(GLint filter)
+{
+    glAssert(glTexParameteri(type, GL_TEXTURE_MIN_FILTER, filter));
+    glAssert(glTexParameteri(type, GL_TEXTURE_MAG_FILTER, filter));
+}
+
 void Texture::bind(int slot)
 {
     GLenum texSlot = GL_TEXTURE0+slot;
     glAssert(glActiveTexture(texSlot));
-    glAssert(glBindTexture(GL_TEXTURE_2D, texId));
+    glAssert(glBindTexture(type, texId));
 }
 

texture.h

@@ -10,10 +10,17 @@ class Texture
 {
 private:
     GLuint texId;
-    QImage* img;
+    GLenum type;
 
+    void createTexture(QString filename, GLenum type);
+    void setWrap(GLint wrap);
+    void setFiltering(GLint filter);
 public:
-    Texture(QString filename);
+    // creates a standard texture from an image
+    Texture(const QString filename);
+    // creates a cubeMap from 6 images
+    Texture(const QString filename[6]);
+
     ~Texture();
     void bind(int slot);
 };

utils.cpp

@@ -0,0 +1,12 @@
+#include "utils.h"
+#include <QFile>
+#include <QTextStream>
+
+QString Utils::fileToString(const QString &filename)
+{
+    QFile f(filename);
+    if(!f.open(QFile::ReadOnly | QFile::Text))
+        return NULL;
+    QTextStream in(&f);
+    return in.readAll();
+}

utils.h

@@ -0,0 +1,12 @@
+#ifndef UTILS_H
+#define UTILS_H
+
+class QString;
+
+class Utils
+{
+public:
+    static QString fileToString(const QString &filename);
+};
+
+#endif // UTILS_H