A white triangle in C with GLFW

glfw_triangle_white.c

// File: glfw_triangle_white.c
// Date: 2024-07-11 | 2024-07-11

#include <GL/gl.h>
#include <GLFW/glfw3.h>
#include <stdio.h>

#define WINDOW_WIDTH 800
#define WINDOW_HEIGHT 600
#define WINDOW_TITLE "Triangle"

typedef struct
{
    double x;
    double y;
}vector2; 

static void triangle(double base_width, double height, vector2 position) {
    glBegin(GL_TRIANGLES);
    glVertex2d(position.x, position.y + height);
    glVertex2d(position.x + base_width, position.y - height / 2.0);
    glVertex2d(position.x - base_width, position.y - height / 2.0);
    glEnd();
}

int main()
{
    const char *error_description;
    GLFWwindow *window;
    if(!glfwInit())
    {
        glfwGetError(&error_description);
        printf("Error: %s", error_description);
        glfwTerminate();
        return -1;
    }
    window = glfwCreateWindow(WINDOW_WIDTH, WINDOW_HEIGHT, WINDOW_TITLE, NULL, NULL);
    if(!window)
    {
        glfwGetError(&error_description);
        printf("Error: %s", error_description);
        glfwTerminate();
        return -1;
    }
    
    glfwMakeContextCurrent(window);
    
    while(!glfwWindowShouldClose(window))
    {
        double last_frame = glfwGetTime();
        double current_time = glfwGetTime();

        double delta_time = current_time - last_frame;

        last_frame = current_time;

        glClear(GL_COLOR_BUFFER_BIT);
        
        triangle(1.0f, 1.0f, (vector2){0, 0});

        glfwSwapBuffers(window);
        glfwPollEvents();
    }

    glfwTerminate();
    return 0;
}