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152 lines
5.9 KiB
152 lines
5.9 KiB
/*******************************************************************************************
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*
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* raylib [models] example - basic voxel
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*
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* Example complexity rating: [★★☆☆] 2/4
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*
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* Example originally created with raylib 5.5, last time updated with raylib 5.5
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*
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* Example contributed by Tim Little (@timlittle) 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) 2025 Tim Little (@timlittle)
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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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#define WORLD_SIZE 8 // Size of our voxel world (8x8x8 cubes)
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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 - basic voxel");
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DisableCursor(); // Lock mouse to window center
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// Define the camera to look into our 3d world (first person)
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Camera3D camera = { 0 };
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camera.position = (Vector3){ -2.0f, 0.0f, -2.0f }; // Camera position at ground level
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camera.target = (Vector3){ 0.0f, 0.0f, 0.0f }; // Camera looking at point
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camera.up = (Vector3){ 0.0f, 1.0f, 0.0f }; // Camera up vector
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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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// Create a cube model
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Mesh cubeMesh = GenMeshCube(1.0f, 1.0f, 1.0f); // Create a unit cube mesh
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Model cubeModel = LoadModelFromMesh(cubeMesh); // Convert mesh to a model
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cubeModel.materials[0].maps[MATERIAL_MAP_DIFFUSE].color = BEIGE;
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// Initialize voxel world - fill with voxels
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bool voxels[WORLD_SIZE][WORLD_SIZE][WORLD_SIZE] = { false };
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for (int x = 0; x < WORLD_SIZE; x++)
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{
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for (int y = 0; y < WORLD_SIZE; y++)
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{
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for (int z = 0; z < WORLD_SIZE; z++)
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{
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voxels[x][y][z] = true;
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}
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}
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}
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SetTargetFPS(60);
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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_FIRST_PERSON);
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// Handle voxel removal with mouse click
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if (IsMouseButtonPressed(MOUSE_LEFT_BUTTON))
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{
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// Cast a ray from the screen center (where crosshair would be)
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Vector2 screenCenter = { screenWidth/2.0f, screenHeight/2.0f };
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Ray ray = GetMouseRay(screenCenter, camera);
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// Check ray collision with all voxels
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bool voxelRemoved = false;
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for (int x = 0; (x < WORLD_SIZE) && !voxelRemoved; x++)
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{
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for (int y = 0; (y < WORLD_SIZE) && !voxelRemoved; y++)
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{
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for (int z = 0; (z < WORLD_SIZE) && !voxelRemoved; z++)
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{
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if (!voxels[x][y][z]) continue; // Skip empty voxels
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// Build a bounding box for this voxel
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Vector3 position = { (float)x, (float)y, (float)z };
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BoundingBox box = {
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(Vector3){ position.x - 0.5f, position.y - 0.5f, position.z - 0.5f },
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(Vector3){ position.x + 0.5f, position.y + 0.5f, position.z + 0.5f }
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};
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// Check ray-box collision
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RayCollision collision = GetRayCollisionBox(ray, box);
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if (collision.hit)
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{
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voxels[x][y][z] = false; // Remove this voxel
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voxelRemoved = true; // Exit all loops
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}
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}
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}
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}
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}
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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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DrawGrid(10, 1.0f);
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// Draw all voxels
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for (int x = 0; x < WORLD_SIZE; x++)
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{
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for (int y = 0; y < WORLD_SIZE; y++)
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{
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for (int z = 0; z < WORLD_SIZE; z++)
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{
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if (!voxels[x][y][z]) continue;
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Vector3 position = { (float)x, (float)y, (float)z };
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DrawModel(cubeModel, position, 1.0f, BEIGE);
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DrawCubeWires(position, 1.0f, 1.0f, 1.0f, BLACK);
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}
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}
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}
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EndMode3D();
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DrawText("Left-click a voxel to remove it!", 10, 10, 20, DARKGRAY);
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DrawText("WASD to move, mouse to look around", 10, 35, 10, 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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UnloadModel(cubeModel);
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CloseWindow();
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//--------------------------------------------------------------------------------------
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return 0;
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}
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