1 files changed, 141 insertions, 0 deletions
diff --git a/src/skybox.cpp b/src/skybox.cpp
new file mode 100644
index 0000000..70af2ce
--- /dev/null
+++ b/src/skybox.cpp
@@ -0,0 +1,141 @@
+#include "skybox.h"
+
+#include "stb/stb_image.h"
+#include <iostream>
+#include <Eigen/Core>
+#include <Eigen/Dense>
+#include <Eigen/Sparse>
+#include <Eigen/Geometry>
+
+
+
+
+
+skybox::skybox()
+{
+    //initializeVAO();
+}
+
+void skybox::initializeVAO(){
+    sky_shape.init(m_vertices_eigen, m_faces);
+    // std::cout << "hehee" << std::endl;
+    skybox_tex = loadCubeMap(m_skyboxTextureFiles);
+
+    glGenVertexArrays(1, &VAO);
+    glGenBuffers(1, &VBO);
+    glBindVertexArray(VAO);
+
+    glBindBuffer(GL_ARRAY_BUFFER, VBO);
+    glBufferData(GL_ARRAY_BUFFER, m_vertices.size()*sizeof(float), m_vertices.data(), GL_STATIC_DRAW);
+
+    glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 3*sizeof(float), (void*)0);
+
+    // unbind
+    glEnableVertexAttribArray(0);
+    glBindBuffer(GL_ARRAY_BUFFER, 0);
+}
+
+
+void skybox::draw(Shader *skybox_shader, Camera  m_camera){
+
+
+
+
+    glDepthFunc(GL_LEQUAL);
+    glDisable(GL_CULL_FACE);
+
+    skybox_shader->bind();
+    Eigen::Vector3f sc = Eigen::Vector3f(.77f, .85f, .99f); // skycolor for fade effect
+    glUniform3f(glGetUniformLocation(skybox_shader->id(), "skyColor"), sc[0], sc[1], sc[2]);
+
+
+    // activate texture
+    glActiveTexture(GL_TEXTURE9);
+    glBindTexture(GL_TEXTURE_CUBE_MAP, skybox_tex);
+    glUniform1i(glGetUniformLocation(skybox_shader->id(), "cubeMap"), 9); // bind texture at slot 9
+
+
+    // manually set view and projection, for non-translating view
+    Eigen::Matrix4f projection = m_camera.getProjection();
+    Eigen::Matrix4f view = m_camera.getView();
+    view.col(3) = Eigen::Vector4f(0, 0, 0, 0);
+
+    glUniformMatrix4fv(glGetUniformLocation(skybox_shader->id(), "view"), 1, GL_FALSE, view.data());
+    glUniformMatrix4fv(glGetUniformLocation(skybox_shader->id(), "projection"), 1, GL_FALSE, projection.data());
+
+//    skybox_shader->setUniform("projection", projection);
+//    skybox_shader->setUniform("view", view);
+
+    // apply rotation matrix
+    skybox_shader->setUniform("rotation", m_rotation_mat);
+
+    glBindVertexArray(VAO);
+    glDrawArrays(GL_TRIANGLES, 0, m_vertices.size());
+
+   glDepthFunc(GL_LESS);
+
+
+          skybox_shader->unbind();
+
+}
+
+void skybox::update(double deltaTime){
+    m_rotation += ROTATE_SPEED * deltaTime;
+
+        auto sinA = std::sin(m_rotation / 2);
+        auto cosA = std::cos(m_rotation/ 2);
+
+        Eigen::Quaternionf q;
+        q.x() = 0 * sinA;
+        q.y() = 1 * sinA;
+        q.z() = 0 * sinA;
+        q.w() = cosA;
+
+        Eigen::Matrix3f mat3 = q.toRotationMatrix();
+        Eigen::Matrix4f mat4 = Eigen::Matrix4f::Identity();
+        mat4.block(0,0,3,3) = mat3;
+
+
+        m_rotation_mat = mat4;
+}
+
+GLuint skybox::loadCubeMap(std::vector<const char*> textureFiles){
+    // create empty texture
+    GLuint textureID;
+    glGenTextures(1, &textureID);
+
+    std::cout << "hello fssd" << std::endl;
+
+
+    //glActiveTexture(GL_TEXTURE3);
+    glBindTexture(GL_TEXTURE_CUBE_MAP, textureID);
+
+    glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MAG_FILTER,GL_LINEAR);
+    glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MIN_FILTER,GL_LINEAR);
+    glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
+    glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
+    glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_R, GL_CLAMP_TO_EDGE);
+
+
+    GLuint target = GL_TEXTURE_CUBE_MAP_POSITIVE_X;
+    for (int i=0; i<6; i++){
+        std::cout << i << std::endl;
+        std::string filename = std::string(textureFiles[i]);//directory + '/' + filename;
+
+        QString sky_texture_filepath = QString(filename.c_str());
+        QImage box_image = QImage(sky_texture_filepath);
+        box_image = box_image.convertToFormat(QImage::Format_RGBA8888);
+        auto data = box_image.bits();
+        int width = box_image.width();
+        int height = box_image.height();
+
+        if (data){
+            glTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_X + i, 0, GL_RGBA, width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE, data);
+
+        }    else {
+            std::cout << "Texture failed to load at path: " << textureFiles[i] << std::endl;
+        }
+    }
+
+    return textureID;
+}