Winning demo of Tokyo Demo Fest 2013 uses OpenCL

flagThe Tokyo Demo Fest 2013 is one of the many demo-parties around the globe. At such parties is where great programmers meet great artists and show off what came out of their collaborations.

The winner of this year used OpenCL to compute real-time procedurally generated geometries. For the rest C++, OpenGL and Gamemonkey Script was used.

Tech features: curl noise, volumetric textures, Perlin noise, mesh deformations, HDR/bloom, film grain, fractals, Hermite splines, Tweens and quaternion iridescent particles.

The creator, Tokyo-based Eddie Lee, has done more projects – be sure to visit his homepage. I hope more demosceners start using the power of OpenCL to get more out of their demo’s.

Do you see where below kernel is used? Hint: check the other videos of Eddie.

__kernel void curlnel( 
                      __read_only image3d_t volume,  
                      sampler_t volumeSampler,  
                      __global float4 *output,  
                      float speed 
                      ) 
{ 
    uint index = get_global_id(0); 
    uint numParticles = get_global_size(0); 
    float indexNormalized = (float)index/numParticles; 

    // read from 3D texture 
    float4 vertData = output[index]; 

    float3 samplePos = vertData.s012; 
    samplePos = samplePos+(float3)(0.5f); 

    float4 voxel = (read_imagef(volume, volumeSampler, 
                   (float4)(samplePos,1.0f))); 

    vertData.s012 += voxel.xyz*speed; 

    output[index] = vertData; 
}

According to GPUVerify (see previous post) the line starting with “float4 voxel” has an error.

Related Posts

stocks

Improving FinanceBench for GPUs Part II – low hanging fruit

...  William Killian, Robert Searles, and John Cavazos. 2013. Accelerating financial applications on the GPU. In Proceedings of the ...

FIA_F1_Austria_2018_Nr._33_Verstappen

The Art of Benchmarking

...  depend on the driver and the track. This article focuses on the foundations of solid benchmarking, so it helps you to decide ...

5yearsSC

Birthday present! Free 1-day Online GPGPU crash course: CUDA / HIP / OpenCL

...  goal is hands on. We'll provide templates for CUDA/HIP and OpenCL, where you focus on making the core compute part. The third goal ...

network-of-boxes

Problem solving tactic: making black boxes smaller

We are a problem solving company first, specialised in HPC - building software close to the processor. The more projects we finish, the more it's clea ...