How We Did 60fps In Our 3D RTS Mobile Game Daniel Sim - Senior Developer Nonstop Games - A King studio Oct 2014
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How We Did 60fps
In Our 3D RTS Mobile Game
Daniel Sim - Senior Developer
Nonstop Games - A King studio
Oct 2014
● Quick Intro
● 3D RTS on Mobile
● Q&A
● Hands-on + Lunch
Overview
About Me
● Started Game Programming in 1987
● Was a “3D Artist” in a previous life (7 years)
● Made game that hit #23 What’s Hot Role
Playing Games for iPad (U.S. App Store)
● MMO Gamer - WoW, EVE Online
● 2009 Singapore Champion - Radio
Controlled Helicopter Aerobatics
● Founded in 2011 - Teemu, Henrik, Juha,
Henrico 17 of us - Passionate about Making Games Gamers
Love
o Encourage Innovation, Individuality
About Nonstop Games
● Real-time Map Strategy War Game (2D)
● App Store Feature (> 100 countries)
Heroes of Honor
About the Kingdom
● Maker of Candy Crush, Farm Heroes, Pet
Rescue, and more!
● 6 Studios in Europe
● Nonstop Games is King’s 1st Studio in Asia!
● Bi-annual Infomarket
● Induction in Europe (Berlin)
● Brand New Office in the City
● Access to network of artist and developers
(Platforms to Share Knowledge)
● And more!
Kingdom Perks
Global Kingdom of Fun
● 345 Million Monthly UNIQUE Users
● 1.2 Billion Average Daily Game Plays
● Truly Free-to-play
Nonstop Games - A King Studio
● Independent Studio
● Fun, Innovative Games
● Beyond Traditional Casual Genre
● Bring Best of East to the Global Market
● Amazing Games in the pipeline
Introducing Our Tech Demo
● FLEET - Naval RTS Prototypeo Current Mobile RTS Examples
o What Might Happen in The Near Future
o Requirements for the Tech Demo
o Ocean Simulation
o Tech Details
o Rendering Techniques
Current Mobile RTS On Mobile
● Clash of Clans
● Boom Beach
In The Near Future...
● High Fidelity 3D Graphics
● Silky Smooth Framerates
● More Complex Battle Mechanics
● Lots of RTS games on mobile
● Many “entry-level” smartphones in use
Tech Demo Requirements
● Naval Combat Game (with Vikings!)
● Hundreds of Units (3D Character Animation)
● Particle Effects for Explosions and Water
● WOW! Ocean Simulation+Effects
● Real-time Physics+AI for Units
● < 100MB Memory Usage (Core Runtime)
Ocean Demo
Video time!
Ocean Simulation
● Try for “Never seen before”
● Works on “all” phones
● Complex Problem
● Techniques apply to any “ground”
Pieces of an Ocean
Detail Normal MapsReflection Map
Displacement+Normal Maps
Displace+Normal Animated Blend
Map A moves
Map B is faster
● RGB is Normal, Alpha is Displacement
● 8x Over-sample over U axis
● Same Technique for Detail Normal Maps
Detail Normal Maps
● Inexpensive “Close-up” Detail
● 4 Normal Map Layers in total
3D Normals into 2D Texture Coords
Reflection Map (Fresnel Mimic)
Challenges (of Oceanic proportions)
● Displacement and Normal Map Size
● Reflection Mapping
● Texture Look-up Bandwidth
● Artist deliver the “Punchline”
● Particle Projection Mappingo Pre-render Noise
o Generate Projected Mesh
o Minimize Overdraw
o A Whole Topic on its own
Epic Naval Battle
Another video!
Tech Details (Entities)
● Fleet Prototype @60fps (iPad 4)
o 4k Bone Animated Tris (4 skin weights per vertex)
o 23k Transform Animated Tris
o 42k Static Tris
o Above Tris are with normals and lit with 2 lights,
ambient + directional
o Box2D physics with 30 dynamic bodies and 28 static
bodies
Tech Details (Ocean + Effects)
● Full scene displacement animated Ocean
Mesh
o 32k tris
o 3.9k tris with particle billboard animation projected
on Ocean Mesh (Ship Wakes)
● Particle Effects
o 1.6k particle billboard animated sprite tris
o Smoke, Explosions and Spells
● Grand Total
o 107,000 Triangles Per Frame
Tech Details (AI, Sound)
● AI + Physics
o Nearest target fire and movement
o AI controls 30 ships
● 16 concurrent sound channels
o 3D spatial processing
32 Ships and a Base on an iPad 2
Brand X (3D Engine)
26 FPS
44 FPS
3D Rendering (1 of 3)
● SIMD capable Vector Matho GLM - Second fastest library, most portable
● Vertex Buffer Objects (VBO)o Pre-load vertex data to GPU
● Vertex Array Objects (VAO)o Pre-configure rendering programs on GPU
3D Rendering (2 of 3)
● Multi-thread Ready (WIP)o Entity Render States are Thread Safe
● Future Proofo Apple Metal Ready
o UBO and Geometry Instancing will be quick to
integrate (OpenGL ES 3.0)
● Vertex Cache Optimized Mesh Export
3D Rendering (3 of 3)
● Particle Animationo Export Baked Animation from Maya
o Animated Attributes Per Particle:
Sprite Frame
Opacity
Twist
Scale
Shaders
● Right Shader for the Right Jobo Optimize where it matters
o Easy to write, use and benchmark custom shader
● Shader Uniformso Aggressive use
o 400% faster than glBufferData (selected use case)
Animation
● Export from C++ Maya Plugin
o Skeleton Animation
o Quaternion Rotations
Record and Interpolation
● GPU based mesh deformation
File Formats
● Mesh, Animation, Collision, Particle and Font
● No-fluff Binaryo Depends on Artist/Content Tools to pull-it together.
● Memory dump of GPU buffer o As fast as it gets
o Not possible all the time
o Amazing with Apple Metal
Questions Please!
● Know Each Other Better
● Seen how we make a naval RTS game
● Went through rendering techniques
● Try the Tech Demo for yourself
o Lunch!
Recap
nonstop-games.com/jobs
linkedin.com/in/danniesim
Thank You!
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