Function main

examples/shaders/shaders_basic_lighting.cpp:39–145

------------------------------------------------------------------------------------ Program main entry point ------------------------------------------------------------------------------------

// Program main entry point
//------------------------------------------------------------------------------------
int main(void)
{
    // Initialization
    //--------------------------------------------------------------------------------------
    const int screenWidth = 800;
    const int screenHeight = 450;

    SetConfigFlags(FLAG_MSAA_4X_HINT);  // Enable Multi Sampling Anti Aliasing 4x (if available)
    InitWindow(screenWidth, screenHeight, "raylib [shaders] example - basic lighting");

    // Define the camera to look into our 3d world
    raylib::Camera camera;
    camera.position = Vector3{ 2.0f, 4.0f, 6.0f };    // Camera position
    camera.target = Vector3{ 0.0f, 0.5f, 0.0f };      // Camera looking at point
    camera.up = Vector3{ 0.0f, 1.0f, 0.0f };          // Camera up vector (rotation towards target)
    camera.fovy = 45.0f;                                // Camera field-of-view Y
    camera.projection = CAMERA_PERSPECTIVE;             // Camera projection type

    // Load basic lighting shader
    raylib::Shader shader (TextFormat("resources/shaders/glsl%i/lighting.vs", GLSL_VERSION),
                           TextFormat("resources/shaders/glsl%i/lighting.fs", GLSL_VERSION));
    // Get some required shader locations
    shader.locs[SHADER_LOC_VECTOR_VIEW] = shader.GetLocation("viewPos");
    // NOTE: "matModel" location name is automatically assigned on shader loading,
    // no need to get the location again if using that uniform name
    //shader.locs[SHADER_LOC_MATRIX_MODEL] = GetShaderLocation(shader, "matModel");

    // Ambient light level (some basic lighting)
    int ambientLoc = shader.GetLocation("ambient");
    std::array<float, 4> ambientValues = {0.1f, 0.1f, 0.1f, 1.0f};
    shader.SetValue(ambientLoc, ambientValues.data(), SHADER_UNIFORM_VEC4);

    // Create lights
    std::array<Light, MAX_LIGHTS> lights = {
        CreateLight(LIGHT_POINT, Vector3 {-2, 1, -2}, Vector3Zero(), YELLOW, shader),
        CreateLight(LIGHT_POINT, Vector3 {2, 1, 2}, Vector3Zero(), RED, shader),
        CreateLight(LIGHT_POINT, Vector3 {-2, 1, 2}, Vector3Zero(), GREEN, shader),
        CreateLight(LIGHT_POINT, Vector3 {2, 1, -2}, Vector3Zero(), BLUE, shader),
    };

    SetTargetFPS(60);                   // Set our game to run at 60 frames-per-second
    //--------------------------------------------------------------------------------------

    // Main game loop
    while (!WindowShouldClose())        // Detect window close button or ESC key
    {
        // Update
        //----------------------------------------------------------------------------------
        camera.Update(CAMERA_ORBITAL);

        // Update the shader with the camera view vector (points towards { 0.0f, 0.0f, 0.0f })
        std::array<float, 3> cameraPos = { camera.position.x, camera.position.y, camera.position.z };
        SetShaderValue(shader, shader.locs[SHADER_LOC_VECTOR_VIEW], cameraPos.data(), SHADER_UNIFORM_VEC3);

        // Check key inputs to enable/disable lights
        if (IsKeyPressed(KEY_Y)) { lights[0].enabled = !lights[0].enabled; }
        if (IsKeyPressed(KEY_R)) { lights[1].enabled = !lights[1].enabled; }
        if (IsKeyPressed(KEY_G)) { lights[2].enabled = !lights[2].enabled; }