Physics Cruiser

const scene = bitbybit.babylon.scene.getScene(); scene.activeCamera.position = new BABYLON.Vector3(-40, 10, -40) const start = async () => { const files = [ "alien-nebula-cruiser-1.glb", "alien-nebula-collision-body-1.glb", ] const gltfFiles = await Promise.all(files.map(fileName => bitbybit.asset.getFile({ fileName }))); const meshes = await Promise.all(gltfFiles.map(assetFile => bitbybit.babylon.io.loadAssetIntoScene({ assetFile, hidden: true }))); const meshSpaceship = meshes[0]; meshSpaceship.position = new BABYLON.Vector3(0, 50, 0); const meshSpadceshipCollisionBody = meshes[1]; const collisionBody = meshSpadceshipCollisionBody.getChildMeshes().find((m) => m.name.includes("surface")) as BABYLON.Mesh; collisionBody.position = new BABYLON.Vector3(0, 50, 0); collisionBody.isVisible = false; const groundMesh = await createBox(); const groundCollisionMesh = groundMesh.getChildMeshes().find((m) => m.name.includes("surface")) as BABYLON.Mesh; bitbybit.babylon.scene.enablePhysics({ vector: [0, -9.81, 0] }); const size = 20; const step = 20; for (let x = -size; x <= size; x += step) { for (let y = -size; y < size * 4; y += step) { for (let z = -size; z <= size; z += step) { const parentMesh = new BABYLON.Mesh(`${x}-${y}-${z}`, scene); meshSpaceship.getChildMeshes().forEach((mesh: BABYLON.Mesh) => { if (mesh.name !== "__root__") { const inst = mesh.createInstance(`${x}-${y}-${z}-instance`); inst.parent = parentMesh; } }); parentMesh.position = new BABYLON.Vector3(x, y + (size * 2), z); const collisionBodyMesh = collisionBody.clone(`${x}-${y}-${z}-collision`); new BABYLON.PhysicsAggregate(parentMesh, BABYLON.PhysicsShapeType.MESH, { mesh: collisionBodyMesh, mass: 3.75, restitution: 0.75 }, scene); } } } new BABYLON.PhysicsAggregate(groundMesh, BABYLON.PhysicsShapeType.MESH, { mesh: groundCollisionMesh, mass: 0, restitution: 0.75 }, scene); meshSpaceship.getChildMeshes().forEach(m => m.isVisible = false); const lightOpt = new Bit.Inputs.BabylonScene.DirectionalLightDto(); lightOpt.direction = [-100, -500, -100]; lightOpt.shadowGeneratorMapSize = 2056; bitbybit.babylon.scene.drawDirectionalLight(lightOpt) } start(); async function createBox() { const box = await bitbybit.occt.shapes.solid.createBox({ width: 100, length: 100, height: 30, center: [0, 13, 0], }) const boxCutout = await bitbybit.occt.shapes.solid.createBox({ width: 90, length: 90, height: 30, center: [0, 15, 0], }) const diff = await bitbybit.occt.booleans.difference({ shape: box, shapes: [boxCutout], keepEdges: false }) const boxDrawOptions = new Bit.Inputs.Draw.DrawOcctShapeOptions(); boxDrawOptions.precision = 0.1; boxDrawOptions.faceColour = "#ff00ff"; const boxMesh = await bitbybit.draw.drawAnyAsync({ entity: diff, options: boxDrawOptions }) return boxMesh }