reinsteam

Atmosphere / Clouds Rendering

Research papers

Atmosphere

• A fast, simple method to render sky color using gradients maps [[Abad06]]
• A Framework for the Experimental Comparison of Solar and Skydome Illumination [[Kider14]]
• A Method for Modeling Clouds based on Atmospheric Fluid Dynamics [[Miyazaki01]]
• A Physically-Based Night Sky Model [[Jensen01]]

reinsteam

#ifndef WIN32_LEAN_AND_MEAN
#   define WIN32_LEAN_AND_MEAN
#endif

#pragma warning (push)
    /* 4820: '<struct-name>' : 'n' bytes padding added after data member '<member-name>'*/
#   pragma warning (disable : 4820)

#   include <windows.h>
#   include <stdio.h>

reinsteam

Perceptual Image Differencing

• [1983. Peter Burt and Edward Adelson. The Laplacian Pyramid as a Compact Image Code][1]
• [1993. Scott Daly. The visible differences predictor: an algorithm for the assessment of image fidelity][2]
• [1995. Andrew S. Glassner. In Principles of digital image synthesis, pages 59-66][3]
• [1997. Gregory Ward-Larson, Holly Rushmeier, and Christine Piatko. A visibility matching tone reproduction operator for high dynamic range scenes][4]
• [1999. Mahesh Ramasubramanian, Sumant N. Pattnaik, Donald P. Greenberg. A perceptually based physical error metric for realistic image synthesis][5]
• [2004. Yangli Hector Yee, Anna Newman. A perceptual metric for production Testing][6]
• [2004. HECTOR YEE, SUMANTA PATTANAIK and DONALD P. GREENBERG. Spatiotemporal Sensitivity and Visual Attention for Efficient Rendering of Dynamic Environments][7]
• [2004. Hector Yee. *A Perceptual Metric for Production Testing (Submitted and Accepted in Journal of

reinsteam

/*----------------------------------------------------------------------------------------------------------------------
    Custom cross-product: mad + mul 
----------------------------------------------------------------------------------------------------------------------*/
half3 crs(half3 v0, half3 v1)
{
    //return cross(v0, v1);
    half3 v0_0 = v0.yzx;
    half3 v0_1 = v1.zxy;
    half3 v1_0 = v0.zxy;
    half3 v1_1 = v1.yzx;

reinsteam

/*
    set isa_file=%~1.isa
    set analysis_file=%~1.a
    set isa_file
    rga --define COMPILER_AMD_RGA=1 --source-kind hlsl --asic Pitcairn --profile cs_5_0 --function %2 --intrinsics --isa %isa_file% %1
 */
#if COMPILER_AMD_RGA
    #include "ags_shader_intrinsics_dx11.hlsl"

    uint2 ballot(bool pred)

reinsteam

Intel(R) Architecture Code Analyzer Version - 2.3 build:c151d5a (Thu, 6 Jul 2017 09:41:36 +0300)
Analyzed File - aosoa_packet.obj
Binary Format - 64Bit
Architecture  - HSW
Analysis Type - Throughput

*******************************************************************
Intel(R) Architecture Code Analyzer Mark Number 1
*******************************************************************

reinsteam

// construct SunDir from cosine of an angle between the vector and zenith (MuS)
SunDir.x = 0.0;
SunDir.y = MuS;
SunDir.z = sqrt(1.0 - MuS * MuS);

// construct EyeDir from cosine of an angle between the vector and zenith (Mu)
EyeDir.x = 0.0;
EyeDir.y = Mu;
EyeDir.z = sqrt(1.0 - Mu * Mu);

reinsteam

Sigma = 1.0638460811;
X0 = 0.0;
X1 = 0.9580110968;
X2 = 2.01388028375;
G(X0) = 0.3750 = 6.0 / 16.0
G(X1) = 0.2500 = 4.0 / 16.0
G(X2) = 0.0625 = 1.0 / 16.0

reinsteam

groupshared float ldsMin[64];
groupshared float ldsMax[64];

void LdsMinMax(uint Idx, uint Ofs)
{
    [branch] if (Idx < Ofs)
    {
        ldsMin[Idx] = min(ldsMin[Idx], ldsMin[Idx + Ofs]);
        ldsMax[Idx] = max(ldsMax[Idx], ldsMax[Idx + Ofs]);
    }

reinsteam

/*-----------------------------------------------------------------------------------------------------------------------
 * Output from Pyramid:
 * 
 * SGPRs:           30 / 102
 * VGPRs:           20 / 256
 * LDS bytes/tg     32 / 32768
 * Waves/Group:    4
 * Occupancy:
 *    S: 10 waves/SIMD
 *    V: 10 waves/SIMD