glm-math

I am rendering a cone, and I would like to rotate it, 90 degrees anti-clockwise, so that the pointy end faces west! I am using OpenGL 3+. Here is my code in my Cone.cpp so far: //PROJECTION glm::mat4 Projection = glm::perspective(45.0f, 1.0f, 0.1f, 100.0f); //VIEW glm::mat4 View = glm::mat4(1.); View = glm::translate(View, glm::vec3(2.0f,4.0f, -25.0f)); //MODEL glm::mat4 Model = glm::mat4(1.0); //Scale by factor 0.5 Model = glm::scale(glm::mat4(1.0f),glm::vec3(0.5f)); glm::mat4 MVP = Projection * View * Model; glUniformMatrix4fv(glGetUniformLocation(shaderprogram_spaceship, "MVP_matrix"), 1,

I am following a tutorial to learn OpenGL in which they used glm::lookAt() function to build a view but I cannot understand the working of glm::lookAt() and apparently, there is no detailed documentation of GLM. Can anyone help me understand the parameters and working of glm::lookAt() please? GLM documentation says: detail::tmat4x4<T> glm::gtc::matrix_transform::lookAt ( detail::tvec3< T > const & eye, detail::tvec3< T > const & center, detail::tvec3< T > const & up ) My current understanding is that camera is located at eye and is faced towards center . (And I don't know what the up is) Preet

What is the way to make all the objects that are not aligned with the origin center (vector3(0.0f,0.0f,0.0f)) , rotate about its own central axis? the problem in pseudo code: vector3 vector3 objectCenter = (10,5,0); // current object center vector3 vector3 objectPosition = (40,5,0); // Place to translate the object vector3 objectRotation; = 45.0f; matrix.loadIdentity (); matrix.translate (objectCenter); //apply transformations matrix.rotateX (objectRotation); matrix.translate (-objectCenter); //itś work correctly until here //when i try to translate the object to the real position, the

I am trying to render a 2D(Screen coordinated) sprite in OpenGL. Yet, when I compile it, it does not show up. I see that the code is fine (There are not even any shader compilation errors nor any other errors). I also have also the matrices set up(which I doubt is causing the problem, and that's where starts the CONFUSION!!) Here is the source code, by the way(without debugging, to make it short):- main.cpp // Including all required headers here... #include <iostream> #define GLEW_STATIC #include <GL/glew.h> #include <GLFW/glfw3.h> #include "SOIL2/SOIL2.h" #include <glm/glm.hpp> #include <glm

i am trying to implement functions, where i can rotate/ translate an object in local or global orientation, like in 3D modeling software, using glm. Something like this: void Rotate(float x, float y, float z, bool localOrientation); but I dont know how to get it working. Local rotation rotation should just be something like this(?): m_Orientation *= glm::rotate(x, glm::vec3(1,0,0); m_Orientation *= glm::rotate(y, glm::vec3(0,1,0); m_Orientation *= glm::rotate(z, glm::vec3(0,0,1); // (m_Orientation is glm::mat4) But how to combine this with local orientation? Actually i need to rotate the