browser/external/raylib-4.5.0/examples/models/models_loading.c
2023-09-27 15:02:24 -04:00

153 lines
6.9 KiB
C

/*******************************************************************************************
*
* raylib [models] example - Models loading
*
* NOTE: raylib supports multiple models file formats:
*
* - OBJ > Text file format. Must include vertex position-texcoords-normals information,
* if files references some .mtl materials file, it will be loaded (or try to).
* - GLTF > Text/binary file format. Includes lot of information and it could
* also reference external files, raylib will try loading mesh and materials data.
* - IQM > Binary file format. Includes mesh vertex data but also animation data,
* raylib can load .iqm animations.
* - VOX > Binary file format. MagikaVoxel mesh format:
* https://github.com/ephtracy/voxel-model/blob/master/MagicaVoxel-file-format-vox.txt
* - M3D > Binary file format. Model 3D format:
* https://bztsrc.gitlab.io/model3d
*
* Example originally created with raylib 2.0, last time updated with raylib 4.2
*
* 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) 2014-2023 Ramon Santamaria (@raysan5)
*
********************************************************************************************/
#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 - models loading");
// Define the camera to look into our 3d world
Camera camera = { 0 };
camera.position = (Vector3){ 50.0f, 50.0f, 50.0f }; // Camera position
camera.target = (Vector3){ 0.0f, 10.0f, 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 mode type
Model model = LoadModel("resources/models/obj/castle.obj"); // Load model
Texture2D texture = LoadTexture("resources/models/obj/castle_diffuse.png"); // Load model texture
model.materials[0].maps[MATERIAL_MAP_DIFFUSE].texture = texture; // Set map diffuse texture
Vector3 position = { 0.0f, 0.0f, 0.0f }; // Set model position
BoundingBox bounds = GetMeshBoundingBox(model.meshes[0]); // Set model bounds
// NOTE: bounds are calculated from the original size of the model,
// if model is scaled on drawing, bounds must be also scaled
bool selected = false; // Selected object flag
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);
// Load new models/textures on drag&drop
if (IsFileDropped())
{
FilePathList droppedFiles = LoadDroppedFiles();
if (droppedFiles.count == 1) // Only support one file dropped
{
if (IsFileExtension(droppedFiles.paths[0], ".obj") ||
IsFileExtension(droppedFiles.paths[0], ".gltf") ||
IsFileExtension(droppedFiles.paths[0], ".glb") ||
IsFileExtension(droppedFiles.paths[0], ".vox") ||
IsFileExtension(droppedFiles.paths[0], ".iqm") ||
IsFileExtension(droppedFiles.paths[0], ".m3d")) // Model file formats supported
{
UnloadModel(model); // Unload previous model
model = LoadModel(droppedFiles.paths[0]); // Load new model
model.materials[0].maps[MATERIAL_MAP_DIFFUSE].texture = texture; // Set current map diffuse texture
bounds = GetMeshBoundingBox(model.meshes[0]);
// TODO: Move camera position from target enough distance to visualize model properly
}
else if (IsFileExtension(droppedFiles.paths[0], ".png")) // Texture file formats supported
{
// Unload current model texture and load new one
UnloadTexture(texture);
texture = LoadTexture(droppedFiles.paths[0]);
model.materials[0].maps[MATERIAL_MAP_DIFFUSE].texture = texture;
}
}
UnloadDroppedFiles(droppedFiles); // Unload filepaths from memory
}
// Select model on mouse click
if (IsMouseButtonPressed(MOUSE_BUTTON_LEFT))
{
// Check collision between ray and box
if (GetRayCollisionBox(GetMouseRay(GetMousePosition(), camera), bounds).hit) selected = !selected;
else selected = false;
}
//----------------------------------------------------------------------------------
// Draw
//----------------------------------------------------------------------------------
BeginDrawing();
ClearBackground(RAYWHITE);
BeginMode3D(camera);
DrawModel(model, position, 1.0f, WHITE); // Draw 3d model with texture
DrawGrid(20, 10.0f); // Draw a grid
if (selected) DrawBoundingBox(bounds, GREEN); // Draw selection box
EndMode3D();
DrawText("Drag & drop model to load mesh/texture.", 10, GetScreenHeight() - 20, 10, DARKGRAY);
if (selected) DrawText("MODEL SELECTED", GetScreenWidth() - 110, 10, 10, GREEN);
DrawText("(c) Castle 3D model by Alberto Cano", screenWidth - 200, screenHeight - 20, 10, GRAY);
DrawFPS(10, 10);
EndDrawing();
//----------------------------------------------------------------------------------
}
// De-Initialization
//--------------------------------------------------------------------------------------
UnloadTexture(texture); // Unload texture
UnloadModel(model); // Unload model
CloseWindow(); // Close window and OpenGL context
//--------------------------------------------------------------------------------------
return 0;
}