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121 righe
5.1 KiB
121 righe
5.1 KiB
/*******************************************************************************************
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*
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* raylib [core] example - Doing skinning on the gpu using a vertex shader
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*
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* Example complexity rating: [★★★☆] 3/4
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*
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* Example originally created with raylib 4.5, last time updated with raylib 4.5
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*
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* Example contributed by Daniel Holden (@orangeduck) and reviewed by Ramon Santamaria (@raysan5)
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*
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* Example licensed under an unmodified zlib/libpng license, which is an OSI-certified,
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* BSD-like license that allows static linking with closed source software
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*
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* Copyright (c) 2024-2025 Daniel Holden (@orangeduck)
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*
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* Note: Due to limitations in the Apple OpenGL driver, this feature does not work on MacOS
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*
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********************************************************************************************/
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#include "raylib.h"
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#include "raymath.h"
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#if defined(PLATFORM_DESKTOP)
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#define GLSL_VERSION 330
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#else // PLATFORM_ANDROID, PLATFORM_WEB
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#define GLSL_VERSION 100
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#endif
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//------------------------------------------------------------------------------------
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// Program main entry point
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//------------------------------------------------------------------------------------
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int main(void)
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{
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// Initialization
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//--------------------------------------------------------------------------------------
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const int screenWidth = 800;
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const int screenHeight = 450;
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InitWindow(screenWidth, screenHeight, "raylib [models] example - GPU skinning");
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// Define the camera to look into our 3d world
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Camera camera = { 0 };
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camera.position = (Vector3){ 5.0f, 5.0f, 5.0f }; // Camera position
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camera.target = (Vector3){ 0.0f, 2.0f, 0.0f }; // Camera looking at point
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camera.up = (Vector3){ 0.0f, 1.0f, 0.0f }; // Camera up vector (rotation towards target)
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camera.fovy = 45.0f; // Camera field-of-view Y
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camera.projection = CAMERA_PERSPECTIVE; // Camera projection type
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// Load gltf model
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Model characterModel = LoadModel("resources/models/gltf/greenman.glb"); // Load character model
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// Load skinning shader
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Shader skinningShader = LoadShader(TextFormat("resources/shaders/glsl%i/skinning.vs", GLSL_VERSION),
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TextFormat("resources/shaders/glsl%i/skinning.fs", GLSL_VERSION));
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characterModel.materials[1].shader = skinningShader;
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// Load gltf model animations
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int animsCount = 0;
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unsigned int animIndex = 0;
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unsigned int animCurrentFrame = 0;
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ModelAnimation *modelAnimations = LoadModelAnimations("resources/models/gltf/greenman.glb", &animsCount);
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Vector3 position = { 0.0f, 0.0f, 0.0f }; // Set model position
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DisableCursor(); // Limit cursor to relative movement inside the window
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SetTargetFPS(60); // Set our game to run at 60 frames-per-second
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//--------------------------------------------------------------------------------------
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// Main game loop
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while (!WindowShouldClose()) // Detect window close button or ESC key
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{
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// Update
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//----------------------------------------------------------------------------------
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UpdateCamera(&camera, CAMERA_THIRD_PERSON);
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// Select current animation
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if (IsKeyPressed(KEY_T)) animIndex = (animIndex + 1)%animsCount;
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else if (IsKeyPressed(KEY_G)) animIndex = (animIndex + animsCount - 1)%animsCount;
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// Update model animation
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ModelAnimation anim = modelAnimations[animIndex];
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animCurrentFrame = (animCurrentFrame + 1)%anim.frameCount;
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characterModel.transform = MatrixTranslate(position.x, position.y, position.z);
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UpdateModelAnimationBones(characterModel, anim, animCurrentFrame);
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//----------------------------------------------------------------------------------
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// Draw
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//----------------------------------------------------------------------------------
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BeginDrawing();
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ClearBackground(RAYWHITE);
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BeginMode3D(camera);
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// Draw character mesh, pose calculation is done in shader (GPU skinning)
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DrawMesh(characterModel.meshes[0], characterModel.materials[1], characterModel.transform);
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DrawGrid(10, 1.0f);
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EndMode3D();
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DrawText("Use the T/G to switch animation", 10, 10, 20, GRAY);
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EndDrawing();
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//----------------------------------------------------------------------------------
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}
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// De-Initialization
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//--------------------------------------------------------------------------------------
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UnloadModelAnimations(modelAnimations, animsCount); // Unload model animation
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UnloadModel(characterModel); // Unload model and meshes/material
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UnloadShader(skinningShader); // Unload GPU skinning shader
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CloseWindow(); // Close window and OpenGL context
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//--------------------------------------------------------------------------------------
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return 0;
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}
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