Ginurx

A Basic Introduction to BRDF-Based Lighting [RECOMMANED]
https://www.cs.princeton.edu/courses/archive/fall06/cos526/tmp/wynn.pdf

A Reflectance Model for Computer Graphics
http://www.graphics.cornell.edu/~westin/consortium-home/cook-tog.pdf

SIGGRAPH 2012 Course: Practical Physically Based Shading in Film and Game Production
http://blog.selfshadow.com/publications/s2012-shading-course/#course_content

SIGGRAPH 2013 Course: Physically Based Shading in Theory and Practice

Ginurx

Umbra3 Occlusion Culling 
    https://www.gamasutra.com/view/feature/164660/sponsored_feature_next_generation_.php?print=1
    https://umbra3d.com/blog/occlusion-culling-solving-the-visibility-problem-part-ii/
    https://support.umbra3d.com/hc/en-us/articles/213354709-Latest-Version-3-4-12
UnrealEngine Culling
    http://timhobsonue4.snappages.com/culling-visibilityculling.htm
    https://api.unrealengine.com/udk/Three/VisibilityCulling.html
    http://timhobsonue4.snappages.com/culling-precomputed-visibility-volumes
Intel Software Occlusion Culling
    https://software.intel.com/en-us/articles/software-occlusion-culling

Ginurx

orignalImage = im2double(imread('grass.tif'));

m = size(orignalImage, 1);
n = size(orignalImage, 2);
piexelNum = m * n;

X = reshape(orignalImage, [piexelNum, 3]);
avg = mean(X);
X2 = X - avg;

Ginurx

-- This is an improved version of https://github.com/cfadmin-cn/kcp_dissector
-- which provides:
--     more detailed "Main" information,
--     multiple KCP segments in one UDP packet support

do
  local IKCP_CMD_PUSH = 81
  local IKCP_CMD_ACK = 82
  local IKCP_CMD_WASK = 83
  local IKCP_CMD_WINS = 84