#version 330 core

layout (location = 0) in vec3 aPosition;
layout (location = 1) in vec3 aNormal;
layout (location = 2) in vec2 aTexCoord;

out vec3 FragPos;
out vec3 Normal;
out vec2 TexCoord;

uniform mat4 uModel;
uniform mat4 uView;
uniform mat4 uProjection;

void main() {
    FragPos = vec3(uModel * vec4(aPosition, 1.0));
    // Use mat3(uModel) directly - avoids expensive inverse() per vertex
    Normal = mat3(uModel) * aNormal;
    TexCoord = aTexCoord;

    gl_Position = uProjection * uView * vec4(FragPos, 1.0);
}