Eulumdat vs Pitch and Roll

Eulumdat is a professional photometric data viewer for lighting engineers, designers, and architects. View and analyze LDT (EULUMDAT) and IES photometric files with beautiful interactive diagrams. Features: • Open and view LDT and IES photometric files • Multiple diagram types: Polar, Cartesian, Butterfly, Heatmap, BUG Rating, and LCS • Interactive 3D butterfly diagram visualization • Export diagrams to SVG • Convert between LDT and IES formats • Batch conversion support • Dark and light theme support • QuickLook preview integration (macOS) Perfect for: • Lighting designers reviewing luminaire data • Architects evaluating lighting fixtures • Engineers analyzing photometric distributions • Anyone working with lighting specification files

Every inclinometer shows your angle. Pitch & Roll knows your limits. An angle alone can't tell you whether you're in trouble — that depends on your vehicle, your tyres, and the ground under them. Pitch & Roll measures the live pull on your vehicle and shows how much of two limits you're using: GRIP — how close your tyres are to sliding. Set by your tyre type and the surface you're on: tarmac, gravel, rock, sand, mud or snow, dry or wet. TIP — how close you are to lifting wheels. Set by your vehicle's real geometry: track width, centre of gravity, wheelbase, roof load, lift. One glance gives you both readings, a dot against your two boundaries, and a plain sentence: "Slide comes first on gravel." "Tip is your nearer limit — watch the lean." No thresholds to guess. No generic warning angle. WHY AN ANGLE ISN'T ENOUGH 23 degrees is a non-event in one vehicle on dry clay and a rollover in another on wet grass. The same corner that barely wakes a stock SUV can lift a wheel on an RV-boxed expedition truck. Pitch & Roll computes the difference — that's the whole point. BUILT FOR THE MOUNT Calibrate once on level ground (two seconds). Mount the phone at any angle, even turned toward the driver — the mount-yaw dial keeps readings in the vehicle's frame, not the phone's. Remounting doesn't need recalibration. CHANGE SURFACE MID-DRIVE Tarmac ends, gravel starts: one tap on the surface selector and your grip limit updates — with a wet modifier where it matters. Watch the boundary move; that's why an angle can't warn you. FOR EVERY RIG — AND THE ROAD TO THE TRAIL From street tyres on a sedan to mud terrains on a lifted pickup: eight tyre classes, from summer road tyres to studded winters, each with its own grip on each surface. Useful on the drive out, honest on the trail. HONEST BY DESIGN Every reading carries a ~ because every limit is an estimate, computed from published engineering values — not a measurement of your exact tyres on your exact rock. Readings are advisories, not safety determinations. Sudden swerves, bouncing, and obstacles can upset a vehicle below these limits. Your eyes are in charge. Interact with the app only while parked. PRIVATE, FREE, QUIET No account. No ads. No subscription. Motion data is processed on the device and uploads nowhere — the privacy label says "Data Not Collected" because there is nothing to collect. Pitch & Roll. Slide or tip — know which, before the trail tells you.