Presentation is loading. Please wait.

Presentation is loading. Please wait.

DX11 TECHNIQUES IN HK2207 Takahiro Harada AMD. DX11 TECHNIQUES IN HK2207 Takahiro Harada AMD.

Published byGordon Stokes Modified over 6 years ago

Similar presentations

Presentation on theme: "DX11 TECHNIQUES IN HK2207 Takahiro Harada AMD. DX11 TECHNIQUES IN HK2207 Takahiro Harada AMD."— Presentation transcript:

1

2 DX11 TECHNIQUES IN HK2207 Takahiro Harada AMD

3 AMD‘s Favorite Effects
HK2207 Demo for Radeon HD 6970 Based in Hong Kong 2207 Not just a single technique Cinematic with practical effects Physics effects Bullet CPU-physics CS rigid body Procedural adaptive tessellation Lighting effects Deferred rendering Post effects 28th Feburary 2011 AMD‘s Favorite Effects

4 AMD‘s Favorite Effects
Live Connection 28th Feburary 2011 AMD‘s Favorite Effects

5 CS Rigid Body Simulation
28th Feburary 2011 AMD‘s Favorite Effects

6 AMD‘s Favorite Effects
CS Rigid Body For visual effect Simulation using CS CS5.0 has full functionality to realize simulation Key Features of CS Group shared memory Tree traversal Narrowphase(NP) Atomics Collision Random write 28th Feburary 2011 AMD‘s Favorite Effects

7 Particle Representation
Approximate shapes with particles Arbitrary convex mesh input Scan conversion Integration A thread, rigid body Collision A thread, particle Collision with mesh Conversion to particles Collide against triangles 28th Feburary 2011 AMD‘s Favorite Effects GPU Gems3, Real-time Rigid Body Simulation on GPUs

8 AMD‘s Favorite Effects
Mesh Collision (BVH) BVH used for broad phase collision detection Contains static scene triangles Node : 4 children, 4 volumes Pack a few triangles in a leaf Traversal efficiency Separate data to another buffer TriData v0 v1 v2 28th Feburary 2011 AMD‘s Favorite Effects

9 AMD‘s Favorite Effects
Mesh Collision (BVH) Tree traversal Traversal stack located in Thread Group Shared Memory(TGSM) Traversal and Narrow phase(NP) are separated to keep high efficiency on the GPU Less divergence Reduce local resource usage 28th Feburary 2011 AMD‘s Favorite Effects

10 AMD‘s Favorite Effects
Narrow Phase Output from tree collision HitData, List of triangle indices per body Sparse 1 body x 1 leaf collision == n particles x m tris Cache relevant triangles in TGSM Reduce memory traffic Use 1 thread group(TG) for a body 1 2 3 4 5 6 7 8 9 10 Body0 Body1 Body2 Body3 Body4 Body5 HitData 2 3 4 8 start n 28th Feburary 2011 AMD‘s Favorite Effects

11 Narrow Phase: 1 Thread Group
Void NP() { Bring64ParticlesIntoGPRs(); if( LOCAL_IDX == 0 ) LoadAllCollisionInfo(); BARRIER; forAllLeaves(;;) forAllTriangles(;;j+=TG_SIZE) fillTriangle( ldsVtx, ldsAabb , LOCAL_IDX ); for(k<TG_SIZE;k++) if( ovelaps(ldsAabb[k]) ) collide( pData, ldsVtx[k] ); } 1 thread : 1 particle Use 1 thread as a controller of the SIMD Read HitData -> LeafData Share LeafData (TGSM) All the threads are used to read 64 tris in parallel 64 collisions in parallel AABB overlap test 1 Triangle vs 64 particles collision 28th Feburary 2011 AMD‘s Favorite Effects

12 AMD‘s Favorite Effects
Inefficiencies Hit data buffer is sparse We launch too many TGs TG with 0 hit returns after mem access Controller sections Only controller is working 63 threads are idle Redundant overlap test(Particle-Tri) Body-Tri test is enough Leaf is not completely filled Several leaves are colliding Can issue more memory requests 28th Feburary 2011 AMD‘s Favorite Effects

13 AMD‘s Favorite Effects
Introduce Prepass Hit data buffer is sparse We launch too many TGs TG with 0 hit returns after mem access Controller sections Only controller is working 63 threads are idle Redundant overlap test(Particle-Tri) Body-Tri test is enough Leaf is not completely filled Several leaves are colliding Can issue more memory requests Use Append Buffer A body/thread Use 64 threads to read Less single thread work Do Body-Tri test Pack triangle Data LeafA(4), LeafB(4) -> 8 Reduce local resource usage Better HW occupancy 28th Feburary 2011 AMD‘s Favorite Effects

14 AMD‘s Favorite Effects
Pre Narrow Phase Use 1 thread for a body Read HitData -> LeafData -> Triangle Body-Triangle AABB test  64 Particle-Triangle collisions Store colliding triangle indices If any collide Write to append buffer Write triangle index to contiguous mem Sorting by n hits improves divergence Local sort Append Append Append Append Append Append 28th Feburary 2011 AMD‘s Favorite Effects

15 AMD‘s Favorite Effects
Improved Narrow Phase Void NP() { Bring64ParticlesIntoGPRs(); if( LOCAL_IDX == 0 ) LoadAllCollisionInfo(); BARRIER; forAllLeaves(;;) forAllTriangles(;;j+=TG_SIZE) fillTriangle( ldsVtx, ldsAabb , LOCAL_IDX ); for(k<TG_SIZE;k++) if( ovelaps(ldsAabb[k]) ) collide( pData, ldsVtx[k] ); } Void NP() { Bring64ParticlesIntoGPRs(); if( LOCAL_IDX == 0 ) LoadNumHits(); BARRIER; for(i<ldsHitTriData.m_n;i+WG_SIZE) fillTriangle( ldsVtx[LOCAL_IDX] , i+LOCAL_IDX ); for(j<WG_SIZE;j++) collide( pData, ldsVtx[j] ); } 28th Feburary 2011 AMD‘s Favorite Effects

16 AMD‘s Favorite Effects
Result 28th Feburary 2011 AMD‘s Favorite Effects

17 AMD‘s Favorite Effects
28th Feburary 2011 AMD‘s Favorite Effects

18 AMD‘s Favorite Effects
MAKING IT LOOK PRETTY … 28th Feburary 2011 AMD‘s Favorite Effects

19 Procedural Adaptive Tessellation
Add surface detail using DX11 tessellation Hull shader Calc tessellation factor using depth Tessellator Domain shader Interpolate vertex position, normal Displacement factor using 3D Perlin noise Evaluate in local space Displacement vector Displace Pixel shader Normal is gradient 28th Feburary 2011 AMD‘s Favorite Effects

20 AMD‘s Favorite Effects
Cracks Different tessellation factor on edge Objects are small enough Sample depth at the center Discontinuous displacement vector Normal is not continuous Use convexity of geometry Interpolate normal and vector from center 28th Feburary 2011 AMD‘s Favorite Effects

21 AMD‘s Favorite Effects
Other Techniques Used Deferred shading Depth of field Emissive materials Lens ghosting and flare Aerial perspective Reflections Tone mapping LUT color correction 28th Feburary 2011 AMD‘s Favorite Effects

22 AMD‘s Favorite Effects
28th Feburary 2011 AMD‘s Favorite Effects

23 AMD‘s Favorite Effects
Color 28th Feburary 2011 AMD‘s Favorite Effects

24 AMD‘s Favorite Effects
Light 28th Feburary 2011 AMD‘s Favorite Effects

25 AMD‘s Favorite Effects
Emissive etc 28th Feburary 2011 AMD‘s Favorite Effects

26 AMD‘s Favorite Effects
DOF 28th Feburary 2011 AMD‘s Favorite Effects

27 AMD‘s Favorite Effects
End Questions? Acknowledgement Jay McKee, Jason Yang, Justin Hensley, Lee Howes, Ali Saif, David Hoff, Abe Wiley, Dan Roeger 28th Feburary 2011 AMD‘s Favorite Effects

Download ppt "DX11 TECHNIQUES IN HK2207 Takahiro Harada AMD. DX11 TECHNIQUES IN HK2207 Takahiro Harada AMD."

Similar presentations

Destruction Masking in Frostbite 2 using Volume Distance Fields

Destruction Masking in Frostbite 2 using Volume Distance Fields
Accelerating Real-Time Shading with Reverse Reprojection Caching Diego Nehab 1 Pedro V. Sander 2 Jason Lawrence 3 Natalya Tatarchuk 4 John R. Isidoro 4.

Accelerating Real-Time Shading with Reverse Reprojection Caching Diego Nehab 1 Pedro V. Sander 2 Jason Lawrence 3 Natalya Tatarchuk 4 John R. Isidoro 4.
DirectCompute Performance on DX11 Hardware

DirectCompute Performance on DX11 Hardware
Advanced Visual Effects with Direct3D

Advanced Visual Effects with Direct3D
Technology Behind AMD’s “Leo Demo” Jay McKee MTS Engineer, AMD

Technology Behind AMD’s “Leo Demo” Jay McKee MTS Engineer, AMD
Exploration of advanced lighting and shading techniques

Exploration of advanced lighting and shading techniques
DX11 TECHNIQUES IN HK2207 Takahiro Harada AMD HK2207 Demo for Radeon HD 6970 Based in Hong Kong 2207 Not just a single technique Cinematic with practical.

DX11 TECHNIQUES IN HK2207 Takahiro Harada AMD HK2207 Demo for Radeon HD 6970 Based in Hong Kong 2207 Not just a single technique Cinematic with practical.
Exploration of bump, parallax, relief and displacement mapping

Exploration of bump, parallax, relief and displacement mapping
Computer graphics & visualization Collisions. computer graphics & visualization Simulation and Animation – SS07 Jens Krüger – Computer Graphics and Visualization.

Computer graphics & visualization Collisions. computer graphics & visualization Simulation and Animation – SS07 Jens Krüger – Computer Graphics and Visualization.
The Art and Technology Behind Bioshock’s Special Effects

The Art and Technology Behind Bioshock’s Special Effects
Week 11 - Wednesday.  Image based effects  Skyboxes  Lightfields  Sprites  Billboards  Particle systems.

Week 11 - Wednesday.  Image based effects  Skyboxes  Lightfields  Sprites  Billboards  Particle systems.
Advanced Rendering MATERIALS, POSTEFFECTS AND SCENE COMPOSITION GDC 2015 1.

Advanced Rendering MATERIALS, POSTEFFECTS AND SCENE COMPOSITION GDC
3D Graphics Rendering and Terrain Modeling

3D Graphics Rendering and Terrain Modeling
Splatting Josh Anon Advanced Graphics 1/29/02. Types of Rendering Algorithms Backward mapping Image plane mapped into data Ray casting Forward mapping.

Splatting Josh Anon Advanced Graphics 1/29/02. Types of Rendering Algorithms Backward mapping Image plane mapped into data Ray casting Forward mapping.
Computer Graphics Hardware Acceleration for Embedded Level Systems Brian Murray 02-15-2002.

Computer Graphics Hardware Acceleration for Embedded Level Systems Brian Murray
CGDD 4003 THE MASSIVE FIELD OF COMPUTER GRAPHICS.

CGDD 4003 THE MASSIVE FIELD OF COMPUTER GRAPHICS.
(conventional Cartesian reference system)

(conventional Cartesian reference system)
X86 and 3D graphics. Quick Intro to 3D Graphics Glossary: –Vertex – point in 3D space –Triangle – 3 connected vertices –Object – list of triangles that.

X86 and 3D graphics. Quick Intro to 3D Graphics Glossary: –Vertex – point in 3D space –Triangle – 3 connected vertices –Object – list of triangles that.
3D Graphics Processor Architecture Victor Moya. PhD Project Research on architecture improvements for future Graphic Processor Units (GPUs). Research.

3D Graphics Processor Architecture Victor Moya. PhD Project Research on architecture improvements for future Graphic Processor Units (GPUs). Research.
IN4151 Introduction 3D graphics 1 Introduction to 3D computer graphics part 2 Viewing pipeline Multi-processor implementation GPU architecture GPU algorithms.

IN4151 Introduction 3D graphics 1 Introduction to 3D computer graphics part 2 Viewing pipeline Multi-processor implementation GPU architecture GPU algorithms.

Similar presentations

Ads by Google