1- /*******************************************************************************************
2- *
3- * raylib [models] example - gpu skinning
4- *
5- * Example complexity rating: [★★★☆] 3/4
6- *
7- * Example originally created with raylib 4.5, last time updated with raylib 4.5
8- *
9- * Example contributed by Daniel Holden (@orangeduck) and reviewed by Ramon Santamaria (@raysan5)
10- *
11- * Example licensed under an unmodified zlib/libpng license, which is an OSI-certified,
12- * BSD-like license that allows static linking with closed source software
13- *
14- * Copyright (c) 2024-2025 Daniel Holden (@orangeduck)
15- *
16- * Note: Due to limitations in the Apple OpenGL driver, this feature does not work on MacOS
17- *
18- ********************************************************************************************/
19-
20- #include "raylib.h"
21-
22- #include "raymath.h"
23-
24- #if defined(PLATFORM_DESKTOP )
25- #define GLSL_VERSION 330
26- #else // PLATFORM_ANDROID, PLATFORM_WEB
27- #define GLSL_VERSION 100
28- #endif
29-
30- //------------------------------------------------------------------------------------
31- // Program main entry point
32- //------------------------------------------------------------------------------------
33- int main (void )
34- {
35- // Initialization
36- //--------------------------------------------------------------------------------------
37- const int screenWidth = 800 ;
38- const int screenHeight = 450 ;
39-
40- InitWindow (screenWidth , screenHeight , "raylib [models] example - gpu skinning" );
41-
42- // Define the camera to look into our 3d world
43- Camera camera = { 0 };
44- camera .position = (Vector3 ){ 5.0f , 5.0f , 5.0f }; // Camera position
45- camera .target = (Vector3 ){ 0.0f , 2.0f , 0.0f }; // Camera looking at point
46- camera .up = (Vector3 ){ 0.0f , 1.0f , 0.0f }; // Camera up vector (rotation towards target)
47- camera .fovy = 45.0f ; // Camera field-of-view Y
48- camera .projection = CAMERA_PERSPECTIVE ; // Camera projection type
49-
50- // Load gltf model
51- Model characterModel = LoadModel ("resources/models/gltf/greenman.glb" ); // Load character model
52-
53- // Load skinning shader
54- Shader skinningShader = LoadShader (TextFormat ("resources/shaders/glsl%i/skinning.vs" , GLSL_VERSION ),
55- TextFormat ("resources/shaders/glsl%i/skinning.fs" , GLSL_VERSION ));
56-
57- characterModel .materials [1 ].shader = skinningShader ;
58-
59- // Load gltf model animations
60- int animsCount = 0 ;
61- unsigned int animIndex = 0 ;
62- unsigned int animCurrentFrame = 0 ;
63- ModelAnimation * modelAnimations = LoadModelAnimations ("resources/models/gltf/greenman.glb" , & animsCount );
64-
65- Vector3 position = { 0.0f , 0.0f , 0.0f }; // Set model position
66-
67- DisableCursor (); // Limit cursor to relative movement inside the window
68-
69- SetTargetFPS (60 ); // Set our game to run at 60 frames-per-second
70- //--------------------------------------------------------------------------------------
71-
72- // Main game loop
73- while (!WindowShouldClose ()) // Detect window close button or ESC key
74- {
75- // Update
76- //----------------------------------------------------------------------------------
77- UpdateCamera (& camera , CAMERA_THIRD_PERSON );
78-
79- // Select current animation
80- if (IsKeyPressed (KEY_T )) animIndex = (animIndex + 1 )%animsCount ;
81- else if (IsKeyPressed (KEY_G )) animIndex = (animIndex + animsCount - 1 )%animsCount ;
82-
83- // Update model animation
84- ModelAnimation anim = modelAnimations [animIndex ];
85- animCurrentFrame = (animCurrentFrame + 1 )%anim .frameCount ;
86- characterModel .transform = MatrixTranslate (position .x , position .y , position .z );
87- UpdateModelAnimationBones (characterModel , anim , animCurrentFrame );
88- //----------------------------------------------------------------------------------
89-
90- // Draw
91- //----------------------------------------------------------------------------------
92- BeginDrawing ();
93-
94- ClearBackground (RAYWHITE );
95-
96- BeginMode3D (camera );
97-
98- // Draw character mesh, pose calculation is done in shader (GPU skinning)
99- DrawMesh (characterModel .meshes [0 ], characterModel .materials [1 ], characterModel .transform );
100-
101- DrawGrid (10 , 1.0f );
102-
103- EndMode3D ();
104-
105- DrawText ("Use the T/G to switch animation" , 10 , 10 , 20 , GRAY );
106-
107- EndDrawing ();
108- //----------------------------------------------------------------------------------
109- }
110-
111- // De-Initialization
112- //--------------------------------------------------------------------------------------
113- UnloadModelAnimations (modelAnimations , animsCount ); // Unload model animation
114- UnloadModel (characterModel ); // Unload model and meshes/material
115- UnloadShader (skinningShader ); // Unload GPU skinning shader
116-
117- CloseWindow (); // Close window and OpenGL context
118- //--------------------------------------------------------------------------------------
119-
120- return 0 ;
1+ /*******************************************************************************************
2+ *
3+ * raylib [models] example - animation gpu skinning
4+ *
5+ * Example complexity rating: [★★★☆] 3/4
6+ *
7+ * Example originally created with raylib 4.5, last time updated with raylib 4.5
8+ *
9+ * Example contributed by Daniel Holden (@orangeduck) and reviewed by Ramon Santamaria (@raysan5)
10+ *
11+ * Example licensed under an unmodified zlib/libpng license, which is an OSI-certified,
12+ * BSD-like license that allows static linking with closed source software
13+ *
14+ * Copyright (c) 2024-2025 Daniel Holden (@orangeduck)
15+ *
16+ * Note: Due to limitations in the Apple OpenGL driver, this feature does not work on MacOS
17+ *
18+ ********************************************************************************************/
19+
20+ #include "raylib.h"
21+
22+ #include "raymath.h"
23+
24+ #if defined(PLATFORM_DESKTOP )
25+ #define GLSL_VERSION 330
26+ #else // PLATFORM_ANDROID, PLATFORM_WEB
27+ #define GLSL_VERSION 100
28+ #endif
29+
30+ //------------------------------------------------------------------------------------
31+ // Program main entry point
32+ //------------------------------------------------------------------------------------
33+ int main (void )
34+ {
35+ // Initialization
36+ //--------------------------------------------------------------------------------------
37+ const int screenWidth = 800 ;
38+ const int screenHeight = 450 ;
39+
40+ InitWindow (screenWidth , screenHeight , "raylib [models] example - animation gpu skinning" );
41+
42+ // Define the camera to look into our 3d world
43+ Camera camera = { 0 };
44+ camera .position = (Vector3 ){ 5.0f , 5.0f , 5.0f }; // Camera position
45+ camera .target = (Vector3 ){ 0.0f , 2.0f , 0.0f }; // Camera looking at point
46+ camera .up = (Vector3 ){ 0.0f , 1.0f , 0.0f }; // Camera up vector (rotation towards target)
47+ camera .fovy = 45.0f ; // Camera field-of-view Y
48+ camera .projection = CAMERA_PERSPECTIVE ; // Camera projection type
49+
50+ // Load gltf model
51+ Model characterModel = LoadModel ("resources/models/gltf/greenman.glb" ); // Load character model
52+
53+ // Load skinning shader
54+ Shader skinningShader = LoadShader (TextFormat ("resources/shaders/glsl%i/skinning.vs" , GLSL_VERSION ),
55+ TextFormat ("resources/shaders/glsl%i/skinning.fs" , GLSL_VERSION ));
56+
57+ characterModel .materials [1 ].shader = skinningShader ;
58+
59+ // Load gltf model animations
60+ int animsCount = 0 ;
61+ unsigned int animIndex = 0 ;
62+ unsigned int animCurrentFrame = 0 ;
63+ ModelAnimation * modelAnimations = LoadModelAnimations ("resources/models/gltf/greenman.glb" , & animsCount );
64+
65+ Vector3 position = { 0.0f , 0.0f , 0.0f }; // Set model position
66+
67+ DisableCursor (); // Limit cursor to relative movement inside the window
68+
69+ SetTargetFPS (60 ); // Set our game to run at 60 frames-per-second
70+ //--------------------------------------------------------------------------------------
71+
72+ // Main game loop
73+ while (!WindowShouldClose ()) // Detect window close button or ESC key
74+ {
75+ // Update
76+ //----------------------------------------------------------------------------------
77+ UpdateCamera (& camera , CAMERA_THIRD_PERSON );
78+
79+ // Select current animation
80+ if (IsKeyPressed (KEY_T )) animIndex = (animIndex + 1 )%animsCount ;
81+ else if (IsKeyPressed (KEY_G )) animIndex = (animIndex + animsCount - 1 )%animsCount ;
82+
83+ // Update model animation
84+ ModelAnimation anim = modelAnimations [animIndex ];
85+ animCurrentFrame = (animCurrentFrame + 1 )%anim .frameCount ;
86+ characterModel .transform = MatrixTranslate (position .x , position .y , position .z );
87+ UpdateModelAnimationBones (characterModel , anim , animCurrentFrame );
88+ //----------------------------------------------------------------------------------
89+
90+ // Draw
91+ //----------------------------------------------------------------------------------
92+ BeginDrawing ();
93+
94+ ClearBackground (RAYWHITE );
95+
96+ BeginMode3D (camera );
97+
98+ // Draw character mesh, pose calculation is done in shader (GPU skinning)
99+ DrawMesh (characterModel .meshes [0 ], characterModel .materials [1 ], characterModel .transform );
100+
101+ DrawGrid (10 , 1.0f );
102+
103+ EndMode3D ();
104+
105+ DrawText ("Use the T/G to switch animation" , 10 , 10 , 20 , GRAY );
106+
107+ EndDrawing ();
108+ //----------------------------------------------------------------------------------
109+ }
110+
111+ // De-Initialization
112+ //--------------------------------------------------------------------------------------
113+ UnloadModelAnimations (modelAnimations , animsCount ); // Unload model animation
114+ UnloadModel (characterModel ); // Unload model and meshes/material
115+ UnloadShader (skinningShader ); // Unload GPU skinning shader
116+
117+ CloseWindow (); // Close window and OpenGL context
118+ //--------------------------------------------------------------------------------------
119+
120+ return 0 ;
121121}
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