Basic OpenGL 3.1 Shaders

basic.frag

// Basic OpenGL Shaders

out vec3 fragColor;

in vec3 wsVertexPosition;
in vec3 msFragNormal;

uniform mat4 M;
uniform mat4 V;
uniform mat4 MVP;
uniform mat3 N;

void main()
{
    vec3 n = normalize(N * msFragNormal);
    vec3 color = n;
    
    if(color.x < 0) color.x * (-1);
    if(color.y < 0) color.y * (-1);
    if(color.z < 0) color.z * (-1);
    
    fragColor = color;
}

basic.vert

// Basic OpenGL Shaders

in vec3 msVertexPosition;
in vec3 msVertexNormal;

out vec3 wsVertexPosition;
out vec3 msFragNormal;

uniform mat4 M;
uniform mat4 V;
uniform mat4 MVP;
uniform mat3 N;

void main()
{
    wsVertexPosition = M * vec4(msVertexPosition, 1);
    msFragNormal = msVertexNormal;
    
    gl_Position = wsVertexPosition;
}