glScale3f but on a GLSL vertex shader?

OpenGL OpenGL: Advanced Coding
1

Hello I’ve finally figured out how to use vertex arrays inside Opengl 3.3x but having issues with my shaders now

I was wondering how to change the size of a quad using a shader this is my current vertex array

   static const GLfloat g_vertex_buffer_data[] = {
             //X       Y      Z
             -1.0f,-1.0f, 0.0f, 
              1.0f,-1.0f, 0.0f, 
              1.0f, 1.0f, 0.0f,
              -1.0f, 1.0f, 0.0f, 
           
             };

and here is my current fragment shader and vertex shader code

//VERTEX SHADER

#version 330 core

layout(location = 0) in vec3 Position;

void main()
{
 gl_Position.xyz = Position;


}

//FRAGMENT SHADER

out vec3 color;
 
void main(){
    color = vec3(1,1,0);
}

Thanks in Advance

2

Your vertex shader is missing ‘standard’ features such as multiply in position by a model matrix and then a camera matrix.
Eg.
gl_Position = cameramatrix * modelmatrix * Position;

In your case the uniform modelmatrix would be an identity matrix which has then been scaled. The. Camera matrix would be just identity.