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

								*

								*   raylib [models] example - Load models M3D

								*

								*   Example originally created with raylib 4.5, last time updated with raylib 4.5

								*

								*   Example contributed by bzt (@bztsrc) and reviewed by Ramon Santamaria (@raysan5)

								*

								*   NOTES:

								*     - Model3D (M3D) fileformat specs: https://gitlab.com/bztsrc/model3d

								*     - Bender M3D exported: https://gitlab.com/bztsrc/model3d/-/tree/master/blender

								*

								*   Example licensed under an unmodified zlib/libpng license, which is an OSI-certified,

								*   BSD-like license that allows static linking with closed source software

								*

								*   Copyright (c) 2022-2023 bzt (@bztsrc)

								*

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


								#include "raylib.h"


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

								// Program main entry point

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

								int main(void)

								{

								    // Initialization

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

								    const int screenWidth = 800;

								    const int screenHeight = 450;


								    InitWindow(screenWidth, screenHeight, "raylib [models] example - M3D model loading");


								    // Define the camera to look into our 3d world

								    Camera camera = { 0 };

								    camera.position = (Vector3){ 1.5f, 1.5f, 1.5f };    // Camera position

								    camera.target = (Vector3){ 0.0f, 0.4f, 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


								    Vector3 position = { 0.0f, 0.0f, 0.0f };            // Set model position


								    char modelFileName[128] = "resources/models/m3d/cesium_man.m3d";

								    bool drawMesh = 1;

								    bool drawSkeleton = 1;

								    bool animPlaying = false;   // Store anim state, what to draw


								    // Load model

								    Model model = LoadModel(modelFileName); // Load the bind-pose model mesh and basic data


								    // Load animations

								    unsigned int animsCount = 0;

								    int animFrameCounter = 0, animId = 0;

								    ModelAnimation *anims = LoadModelAnimations(modelFileName, &animsCount); // Load skeletal animation data


								    DisableCursor();                    // Limit cursor to relative movement inside the window


								    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

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

								        UpdateCamera(&camera, CAMERA_FIRST_PERSON);


								        if (animsCount)

								        {

								            // Play animation when spacebar is held down (or step one frame with N)

								            if (IsKeyDown(KEY_SPACE) || IsKeyPressed(KEY_N))

								            {

								                animFrameCounter++;


								                if (animFrameCounter >= anims[animId].frameCount) animFrameCounter = 0;


								                UpdateModelAnimation(model, anims[animId], animFrameCounter);

								                animPlaying = true;

								            }


								            // Select animation by pressing C

								            if (IsKeyPressed(KEY_C))

								            {

								                animFrameCounter = 0;

								                animId++;


								                if (animId >= animsCount) animId = 0;

								                UpdateModelAnimation(model, anims[animId], 0);

								                animPlaying = true;

								            }

								        }


								        // Toggle skeleton drawing

								        if (IsKeyPressed(KEY_B)) drawSkeleton ^= 1;


								        // Toggle mesh drawing

								        if (IsKeyPressed(KEY_M)) drawMesh ^= 1;

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


								        // Draw

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

								        BeginDrawing();


								            ClearBackground(RAYWHITE);


								            BeginMode3D(camera);


								                // Draw 3d model with texture

								                if (drawMesh) DrawModel(model, position, 1.0f, WHITE);


								                // Draw the animated skeleton

								                if (drawSkeleton)

								                {

								                    // Loop to (boneCount - 1) because the last one is a special "no bone" bone,

								                    // needed to workaround buggy models

								                    // without a -1, we would always draw a cube at the origin

								                    for (int i = 0; i < model.boneCount - 1; i++)

								                    {

								                        // By default the model is loaded in bind-pose by LoadModel().

								                        // But if UpdateModelAnimation() has been called at least once

								                        // then the model is already in animation pose, so we need the animated skeleton

								                        if (!animPlaying || !animsCount)

								                        {

								                            // Display the bind-pose skeleton

								                            DrawCube(model.bindPose[i].translation, 0.04f, 0.04f, 0.04f, RED);


								                            if (model.bones[i].parent >= 0)

								                            {

								                                DrawLine3D(model.bindPose[i].translation,

								                                    model.bindPose[model.bones[i].parent].translation, RED);

								                            }

								                        }

								                        else

								                        {

								                            // Display the frame-pose skeleton

								                            DrawCube(anims[animId].framePoses[animFrameCounter][i].translation, 0.05f, 0.05f, 0.05f, RED);


								                            if (anims[animId].bones[i].parent >= 0)

								                            {

								                                DrawLine3D(anims[animId].framePoses[animFrameCounter][i].translation,

								                                    anims[animId].framePoses[animFrameCounter][anims[animId].bones[i].parent].translation, RED);

								                            }

								                        }

								                    }

								                }


								                DrawGrid(10, 1.0f);         // Draw a grid


								            EndMode3D();


								            DrawText("PRESS SPACE to PLAY MODEL ANIMATION", 10, GetScreenHeight() - 80, 10, MAROON);

								            DrawText("PRESS N to STEP ONE ANIMATION FRAME", 10, GetScreenHeight() - 60, 10, DARKGRAY);

								            DrawText("PRESS C to CYCLE THROUGH ANIMATIONS", 10, GetScreenHeight() - 40, 10, DARKGRAY);

								            DrawText("PRESS M to toggle MESH, B to toggle SKELETON DRAWING", 10, GetScreenHeight() - 20, 10, DARKGRAY);

								            DrawText("(c) CesiumMan model by KhronosGroup", GetScreenWidth() - 210, GetScreenHeight() - 20, 10, GRAY);


								        EndDrawing();

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

								    }


								    // De-Initialization

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


								    // Unload model animations data

								    UnloadModelAnimations(anims, animsCount);


								    UnloadModel(model);         // Unload model


								    CloseWindow();              // Close window and OpenGL context

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


								    return 0;

								}