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raylib-src
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								/*******************************************************************************************

								*

								*   raylib [shaders] example - Basic lighting: Blinn-Phong

								*

								*   This example has been created using raylib 1.3 (www.raylib.com)

								*   raylib is licensed under an unmodified zlib/libpng license (View raylib.h for details)

								*

								*   Copyright (c) 2014 Ramon Santamaria (@raysan5)

								*

								********************************************************************************************/


								#include "raylib.h"


								#define SHININESS_SPEED 1.0f

								#define LIGHT_SPEED 0.25f


								// Light type

								typedef struct Light {

								    Vector3 position;

								    Vector3 direction;

								    float intensity;

								    float specIntensity;

								    Color diffuse;

								    Color ambient;

								    Color specular;

								} Light;


								int main()

								{

								    // Initialization

								    //--------------------------------------------------------------------------------------

								    const int screenWidth = 800;

								    const int screenHeight = 450;


								    SetConfigFlags(FLAG_MSAA_4X_HINT);

								    InitWindow(screenWidth, screenHeight, "raylib [shaders] example - basic lighting");


								    // Camera initialization

								    Camera camera = {{ 8.0f, 8.0f, 8.0f }, { 0.0f, 3.0f, 0.0f }, { 0.0f, 1.0f, 0.0f }};


								    // Model initialization

								    Vector3 position = { 0.0f, 0.0f, 0.0f };

								    Model model = LoadModel("resources/model/dwarf.obj");

								    Shader shader = LoadShader("resources/shaders/phong.vs", "resources/shaders/phong.fs");

								    SetModelShader(&model, shader);


								    // Shader locations initialization

								    int lIntensityLoc = GetShaderLocation(shader, "light_intensity");

								    int lAmbientLoc = GetShaderLocation(shader, "light_ambientColor");

								    int lDiffuseLoc = GetShaderLocation(shader, "light_diffuseColor");

								    int lSpecularLoc = GetShaderLocation(shader, "light_specularColor");

								    int lSpecIntensityLoc = GetShaderLocation(shader, "light_specIntensity");


								    int mAmbientLoc = GetShaderLocation(shader, "mat_ambientColor");

								    int mSpecularLoc = GetShaderLocation(shader, "mat_specularColor");

								    int mGlossLoc = GetShaderLocation(shader, "mat_glossiness");


								    // Camera and light vectors shader locations

								    int cameraLoc = GetShaderLocation(shader, "cameraPos");

								    int lightLoc = GetShaderLocation(shader, "lightPos");


								    // Model and View matrix locations (required for lighting)

								    int modelLoc = GetShaderLocation(shader, "modelMatrix");

								    //int viewLoc = GetShaderLocation(shader, "viewMatrix");        // Not used


								    // Light and material definitions

								    Light light;

								    Material matBlinn;


								    // Light initialization

								    light.position = (Vector3){ 4.0f, 2.0f, 0.0f };

								    light.direction = (Vector3){ 5.0f, 1.0f, 1.0f };

								    light.intensity = 1.0f;

								    light.diffuse = WHITE;

								    light.ambient = (Color){ 150, 75, 0, 255 };

								    light.specular = WHITE;

								    light.specIntensity = 1.0f;


								    // Material initialization

								    matBlinn.diffuse = WHITE;

								    matBlinn.ambient = (Color){ 50, 50, 50, 255 };

								    matBlinn.specular = WHITE;

								    matBlinn.glossiness = 50.0f;


								    // Setup camera

								    SetCameraMode(CAMERA_FREE);             // Set camera mode

								    SetCameraPosition(camera.position);     // Set internal camera position to match our camera position

								    SetCameraTarget(camera.target);         // Set internal camera target to match our camera target


								    SetTargetFPS(60);

								    //--------------------------------------------------------------------------------------


								    // Main game loop

								    while (!WindowShouldClose())    // Detect window close button or ESC key

								    {

								        // Update

								        //----------------------------------------------------------------------------------

								        UpdateCamera(&camera);      // Update camera position


								        // NOTE: Model transform can be set in model.transform or directly with params at draw... WATCH OUT!

								        SetShaderValueMatrix(shader, modelLoc, model.transform);            // Send model matrix to shader

								        //SetShaderValueMatrix(shader, viewLoc, GetCameraMatrix(camera));   // Not used


								        // Glossiness input control

								        if(IsKeyDown(KEY_UP)) matBlinn.glossiness += SHININESS_SPEED;

								        else if(IsKeyDown(KEY_DOWN))

								        {

								            matBlinn.glossiness -= SHININESS_SPEED;

								            if( matBlinn.glossiness < 0) matBlinn.glossiness = 0.0f;

								        }


								        // Light X movement

								        if (IsKeyDown(KEY_D)) light.position.x += LIGHT_SPEED;

								        else if(IsKeyDown(KEY_A)) light.position.x -= LIGHT_SPEED;


								        // Light Y movement

								        if (IsKeyDown(KEY_LEFT_SHIFT)) light.position.y += LIGHT_SPEED;

								        else if (IsKeyDown(KEY_LEFT_CONTROL)) light.position.y -= LIGHT_SPEED;


								        // Light Z movement

								        if (IsKeyDown(KEY_S)) light.position.z += LIGHT_SPEED;

								        else if (IsKeyDown(KEY_W)) light.position.z -= LIGHT_SPEED;


								        // Send light values to shader

								        SetShaderValue(shader, lIntensityLoc, &light.intensity, 1);

								        SetShaderValue(shader, lAmbientLoc, ColorToFloat(light.ambient), 3);

								        SetShaderValue(shader, lDiffuseLoc, ColorToFloat(light.diffuse), 3);

								        SetShaderValue(shader, lSpecularLoc, ColorToFloat(light.specular), 3);

								        SetShaderValue(shader, lSpecIntensityLoc, &light.specIntensity, 1);


								        // Send material values to shader

								        SetShaderValue(shader, mAmbientLoc, ColorToFloat(matBlinn.ambient), 3);

								        SetShaderValue(shader, mSpecularLoc, ColorToFloat(matBlinn.specular), 3);

								        SetShaderValue(shader, mGlossLoc, &matBlinn.glossiness, 1);


								        // Send camera and light transform values to shader

								        SetShaderValue(shader, cameraLoc, VectorToFloat(camera.position), 3);

								        SetShaderValue(shader, lightLoc, VectorToFloat(light.position), 3);

								        //----------------------------------------------------------------------------------


								        // Draw

								        //----------------------------------------------------------------------------------

								        BeginDrawing();


								            ClearBackground(RAYWHITE);


								            Begin3dMode(camera);


								                DrawModel(model, position, 4.0f, matBlinn.diffuse);

								                DrawSphere(light.position, 0.5f, GOLD);


								                DrawGrid(20, 1.0f);


								            End3dMode();


								            DrawFPS(10, 10);                // Draw FPS


								        EndDrawing();

								        //----------------------------------------------------------------------------------

								    }


								    // De-Initialization

								    //--------------------------------------------------------------------------------------

								    UnloadShader(shader);

								    UnloadModel(model);


								    CloseWindow();        // Close window and OpenGL context

								    //--------------------------------------------------------------------------------------


								    return 0;

								}