Create Matrix

mat3

(2024-02-01)

• Type: typedef mat3x3 mat3 API - GLM: Types

• Passing a single scalar will initialize the diagonal. OpenGL Mathematics (GLM)

• OpenGL矩阵运算——GLM库的使用 - CSDN

Example: 3DGS

 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15

#include <glm/glm.hpp>
#include<glm/gtx/string_cast.hpp>
#include <iostream>

int main(){
    glm::mat3 S = glm::mat3(1.0f);  // identity matrix

    // Make scaling matrix
    S[0][0] = 2;
    S[1][1] = 3;
    S[2][2] = 4;

    std::cout << glm::to_string(S) << std::endl;
    return 0;
}

• Output

  1 2 3

  (base) yi@yi-Alienware:~/Downloads/Cpp_Study$ g++ test_glm.cpp (base) yi@yi-Alienware:~/Downloads/Cpp_Study$ ./a.out mat3x3((2.000000, 0.000000, 0.000000), (0.000000, 3.000000, 0.000000), (0.000000, 0.000000, 4.000000))

• Refer to How do I print vector values of type glm::vec3 that have been passed by reference? - SO

• Use glm::to_string(). Episode 18 - OpenGL Math - Introduction to the GLM Library - Modern OpenGL - Mike Shah