#include "BumpMapDemo.h"

BumpMapDemo::BumpMapDemo()
    : height_scale(0.2), render_shader(Shader("Shader/bump.vs", "Shader/bump.fs")),
      camera(Camera(90, 1920, 1080, 0.1, 1000.0)),
      albedo("Resources/Textures/PavingStones/PavingStones070_2K_Color.jpg", Texture::Settings()),
      bump("Resources/Textures/PavingStones/PavingStones070_2K_Displacement.jpg",
           Texture::Settings()),
      normal("Resources/Textures/PavingStones/PavingStones070_2K_Normal.jpg", Texture::Settings()) {
    // Move and rotate the camera so we see the quad well
    camera.translate(glm::vec3(0.0, -1.0, 1.0));
    camera.rotate(30, glm::vec3(1.0, 0.0, 0.0));
}

void BumpMapDemo::render(float delta) {
    glClearColor(0.1f, 0.1f, 0.1f, 1.0f);
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

    render_shader.use();

    // Camera
    render_shader.setMat4("projection", camera.get_projection());
    render_shader.setMat4("view", camera.get_view());
    render_shader.setVec3("viewPos", camera.get_translation());

    // Lighting
    render_shader.setVec3("lightPos", glm::vec3(0.0, 1.0, 5.0));

    // Settings for bump mapping
    render_shader.setFloat("height_scale", height_scale);

    // Textures
    albedo.bind_to(0);
    normal.bind_to(1);
    bump.bind_to(2);

    // Quad which is rendered onto
    quad_mesh.rotate(delta * 25.0f, glm::normalize(glm::vec3(0.0, 0.0, 1.0)));
    quad_mesh.render(render_shader);
}