Questions tagged [glm-math]
GLM is a C++ math library designed to mimic the OpenGL Shading Language's math functions and types (vectors, matrices) as closely as possible.
glm-math
1,363
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Camera movement on opengl project: sideways movement rotates and skews image
im trying to make a simple triangle mesh and look at it with a camera. The mesh should be in the x/y plane with z = 0, while the camera should be at the same plane but z = 10. The project is in this ...
- 19
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How to know the existing pixel value of the framebuffer [duplicate]
I am trying to make a heatmap and in my Fragment shader i want to know the existing color value of the pixel on which the shader will write.
Based on the red color value i want to decide whether to ...
- 2,210
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1
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How to translate point light and rotate directional light OpenGL?
I intend to implement Gouraud shading with two light.(point light and directional light)
I want to translate the point light and rotate the directional light with keyboard callback function of OpenGL.
...
- 1
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71
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glm::lookAt - image is visually flipped both x and y axis
To better understand OpenGL pipeline, I wrote simple two dimensional demo with a "camera".
The program displays a quad in the left half of a screen with "camera" at the center. ...
- 868
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OpenGL Rendering Issue with VAO in Mesh Class - GL_INVALID_ENUM Error [closed]
I am rendering a rectangle using a mesh class to encapsulate the vertex and index data, as well as handle rendering. However, I've encountered an issue where the mesh object does not render, and I'm ...
- 17
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Error: no user-provided default constructor when multiplying matrices
I have some pretty basic code that I wouldn't think would cause problems:
#include <glm/ext.hpp>
...
mat4x4 m = mat4x4(1.0f);
m = rotate(m, (float) glfwGetTime(), vec3(0.0f, 0.0f, 1.0f));
...
-1
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1
answer
33
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draw cubes with index buffer in openGL
I want to draw a 3D cube:
#include <stdio.h>
#include <stdlib.h>
#include <string>
#include <iostream>
#include <fstream>
#include <vector>
#include <algorithm&...
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1
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42
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Frustum Culling Not Utilizing Entire Bounding Sphere in OpenGL [closed]
My frustum culling is detecting an object as culled even though not the entire object's bounding sphere is out of the frustum yet. It's like it believes the bounding sphere's radius is smaller than it ...
- 154
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108
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GLM warnings after vscode update
After a vs code update (2024-05 update) my build using cmake did not work anymore. Somewhere along the way a include path in my Cmakefiles.txt got lost and wouldn't work anymore. This also happened ...
- 19
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29
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Invalid RayCast algorithm output
I am writing my own physics engine in C++ using the glm library. But when I wrote a RayCast function that should detect the intersection of a ray with a triangle, I found that it gives wrong results. ...
- 21
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96
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Strange behaviour of GJK collision detection algorithm
In 1 image there is no collision, but in 2 there is
I have a bug with GJK algorithm. I am using glm library and I am facing a problem that when I increase the size of the model using matrix, GJK ...
- 21
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49
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Can I get my texture coordinates as pixel coords in 2D Game?
I have an issue with my 2D Game in C++/OpenGL.
I need to somehow get the pixel coordinates (preferably the glfw coords) of a texture that has been rendered on the screen. The final goal is to be able ...
- 31
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Converting Cannojs 3D world vectors to model-view matrix
I use glmatrix 3.4.0 .
With position i dont have any problem.
Event glmatrix last version have some support for QUAT i cant make correct way of converting from QUAT to AxisAngle or rotate mat4 ...
I ...
- 4,197
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70
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How does OpenGL std430 layout align elements in an array?
I have a PointLight struct in C++
struct PointLight
{
glm::vec4 position; // 16 bytes
glm::vec4 color; // 16 bytes
float intensity; // 4 bytes rounded to 16 bytes?
float range; // ...
- 23
1
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1
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What is the difference between glGenRenderbuffers and glCreateRenderbuffers?
SPEC:
glCreateRenderbuffers:
glCreateRenderbuffers — create renderbuffer objects
void glCreateRenderbuffers(GLsizei n, GLuint *renderbuffers);
n: Number of renderbuffer objects to create.
...
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