Function main

examples/shaders/shaders_basic_pbr.cpp:79–286

---------------------------------------------------------------------------------- Main Entry Point ----------------------------------------------------------------------------------

// Main Entry Point
//----------------------------------------------------------------------------------
int main()
{
    // Initialization
    //--------------------------------------------------------------------------------------
    const int screenWidth = 800;
    const int screenHeight = 450;

    SetConfigFlags(FLAG_MSAA_4X_HINT);
    InitWindow(screenWidth, screenHeight, "raylib [shaders] example - basic pbr");

    // Define the camera to look into our 3d world
    raylib::Camera camera;
    camera.position = Vector3{ 2.0f, 2.0f, 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 PBR shader and setup all required locations
    raylib::Shader shader (TextFormat("resources/shaders/glsl%i/pbr.vs", GLSL_VERSION),
                           TextFormat("resources/shaders/glsl%i/pbr.fs", GLSL_VERSION));
    shader.locs[SHADER_LOC_MAP_ALBEDO] = GetShaderLocation(shader, "albedoMap");
    // WARNING: Metalness, roughness, and ambient occlusion are all packed into a MRA texture
    // They are passed as to the SHADER_LOC_MAP_METALNESS location for convenience,
    // shader already takes care of it accordingly
    shader.locs[SHADER_LOC_MAP_METALNESS] = GetShaderLocation(shader, "mraMap");
    shader.locs[SHADER_LOC_MAP_NORMAL] = GetShaderLocation(shader, "normalMap");
    // WARNING: Similar to the MRA map, the emissive map packs different information
    // into a single texture: it stores height and emission data
    // It is binded to SHADER_LOC_MAP_EMISSION location an properly processed on shader
    shader.locs[SHADER_LOC_MAP_EMISSION] = GetShaderLocation(shader, "emissiveMap");
    shader.locs[SHADER_LOC_COLOR_DIFFUSE] = GetShaderLocation(shader, "albedoColor");

    // Setup additional required shader locations, including lights data
    shader.locs[SHADER_LOC_VECTOR_VIEW] = GetShaderLocation(shader, "viewPos");
    int lightCountLoc = GetShaderLocation(shader, "numOfLights");
    int maxLightCount = MAX_LIGHTS;
    shader.SetValue(lightCountLoc, &maxLightCount, SHADER_UNIFORM_INT);

    // Setup ambient color and intensity parameters
    float ambientIntensity = 0.02f;
    raylib::Color ambientColor = Color{ 26, 32, 135, 255 };
    raylib::Vector3 ambientColorNormalized = Vector3{ ambientColor.r/255.0f, ambientColor.g/255.0f, ambientColor.b/255.0f };
    shader.SetValue(shader.GetLocation("ambientColor"), &ambientColorNormalized, SHADER_UNIFORM_VEC3);
    shader.SetValue(shader.GetLocation("ambient"), &ambientIntensity, SHADER_UNIFORM_FLOAT);

    // Get location for shader parameters that can be modified in real time
    int emissiveIntensityLoc = shader.GetLocation("emissivePower");
    int emissiveColorLoc = shader.GetLocation("emissiveColor");
    int textureTilingLoc = shader.GetLocation("tiling");

    // Load old car model using PBR maps and shader
    // WARNING: We know this model consists of a single model.meshes[0] and
    // that model.materials[0] is by default assigned to that mesh
    // There could be more complex models consisting of multiple meshes and
    // multiple materials defined for those meshes... but always 1 mesh = 1 material
    raylib::Model car ("resources/models/old_car_new.glb");