Tesseract-Engine/assets/shaders/UnlitMaterial.vert

#version 330 core

layout(location = 0) in vec3 aPos;      // Vertex position
layout(location = 1) in vec2 aTexCoord; // Texture coordinate
layout(location = 2) in vec3 aNormal;   // Vertex normal

uniform mat4 uMVP;                    // Model-View-Projection matrix
uniform mat4 uModel;                  // Model matrix
uniform mat4 uLightSpaceMatrix;       // Light space matrix

out vec2 TexCoord;                    // Passed to fragment shader
out vec3 Normal;                      // Passed to fragment shader
out vec3 FragPos;                     // Passed to fragment shader
out vec4 FragPosLightSpace;          // Passed to fragment shader

void main()
{
    // Compute the fragment position in world space
    FragPos = vec3(uModel * vec4(aPos, 1.0));

    // Transform the normal vector
    Normal = mat3(transpose(inverse(uModel))) * aNormal;  

    // Pass through the texture coordinate
    TexCoord = aTexCoord;

    // Transform the fragment position to light space
    FragPosLightSpace = uLightSpaceMatrix * vec4(FragPos, 1.0);

    // Final vertex position
    gl_Position = uMVP * vec4(aPos, 1.0);
}