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models_loading_m3d.c
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132 lines (107 loc) · 5.51 KB
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/*******************************************************************************************
*
* raylib [models] example - loading m3d
*
* Example complexity rating: [★★☆☆] 2/4
*
* 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) 2022-2025 bzt (@bztsrc)
*
********************************************************************************************/
#include "raylib.h"
static void DrawModelSkeleton(ModelSkeleton skeleton, ModelAnimPose pose, float scale, Color color);
//------------------------------------------------------------------------------------
// Program main entry point
//------------------------------------------------------------------------------------
int main(void)
{
// Initialization
//--------------------------------------------------------------------------------------
const int screenWidth = 800;
const int screenHeight = 450;
InitWindow(screenWidth, screenHeight, "raylib [models] example - loading m3d");
// 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
// Load model
Model model = LoadModel("resources/models/m3d/cesium_man.m3d"); // Load the animated model mesh and basic data
Vector3 position = { 0.0f, 0.0f, 0.0f }; // Set model position
// Load animation data
int animCount = 0;
ModelAnimation *anims = LoadModelAnimations("resources/models/m3d/cesium_man.m3d", &animCount);
// Animation playing variables
unsigned int animIndex = 0; // Current animation playing
float animCurrentFrame = 0.0f; // Current animation frame (supporting interpolated frames)
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_ORBITAL);
// Select current animation
if (IsKeyPressed(KEY_RIGHT)) animIndex = (animIndex + 1)%animCount;
else if (IsKeyPressed(KEY_LEFT)) animIndex = (animIndex + animCount - 1)%animCount;
// Update model animation
animCurrentFrame += 1.0f;
if (animCurrentFrame >= anims[animIndex].keyframeCount) animCurrentFrame = 0.0f;
UpdateModelAnimation(model, anims[animIndex], animCurrentFrame);
//----------------------------------------------------------------------------------
// Draw
//----------------------------------------------------------------------------------
BeginDrawing();
ClearBackground(RAYWHITE);
BeginMode3D(camera);
// Draw 3d model with texture
if (!IsKeyDown(KEY_SPACE)) DrawModel(model, position, 1.0f, WHITE);
else
{
// Draw the animated skeleton
DrawModelSkeleton(model.skeleton, anims[animIndex].keyframePoses[(int)animCurrentFrame], 1.0f, RED);
}
DrawGrid(10, 1.0f);
EndMode3D();
DrawText(TextFormat("Current animation: %s", anims[animIndex].name), 10, 10, 20, LIGHTGRAY);
DrawText("Press SPACE to draw skeleton", 10, 40, 20, MAROON);
DrawText("(c) CesiumMan model by KhronosGroup", GetScreenWidth() - 210, GetScreenHeight() - 20, 10, GRAY);
EndDrawing();
//----------------------------------------------------------------------------------
}
// De-Initialization
//--------------------------------------------------------------------------------------
UnloadModelAnimations(anims, animCount); // Unload model animations data
UnloadModel(model); // Unload model
CloseWindow(); // Close window and OpenGL context
//--------------------------------------------------------------------------------------
return 0;
}
// Draw model skeleton
static void DrawModelSkeleton(ModelSkeleton skeleton, ModelAnimPose pose, float scale, Color color)
{
// Loop to (boneCount - 1) because the last one is a special "no bone" bone,
// needed to workaround buggy models without a -1, a cube is always drawn at the origin
for (int i = 0; i < skeleton.boneCount - 1; i++)
{
// Display the frame-pose skeleton
DrawCube(pose[i].translation, scale*0.05f, scale*0.05f, scale*0.05f, color);
if (skeleton.bones[i].parent >= 0)
{
DrawLine3D(pose[i].translation, pose[skeleton.bones[i].parent].translation, color);
}
}
}