好黑暗的會議
昨天的會議後來真是讓我覺得有點灰心，可能這就是社會...會有人被覺得不適合，然後就從你身邊被拔掉了。如果平常表現的能力無法取得信任，又沒有時時為自己充電新知識，就會被有所挑剔。其實在旁邊聽的我，也覺得自己要有所警惕，效率要快，要多汲取新知，不然隨時都會被後來的新血給取代...
Physically-Based Rendering in WebGL
According to the image from Physically Based Shading At Disney as below, the left is the real chrome, the middle is PBR approach, and the right is Blinn-Phong. We can find PBR is more closer to the real case, and the difference part is the specular lighting part. Blinn-Phong The most important part of specular term in Blinn-Phong is it uses half-vector instead of using dot(lightDir, normalDir) to avoid the traditional Phong lighting model hard shape problem. vec3 BRDF_Specular_BlinnPhong( vec3 lightDir, vec3 viewDir, vec3 normal, vec3 specularColor, float shininess ) { vec3 halfDir = normalize( lightDir + viewDir ); float dotNH = saturate( dot( normal, halfDir ) ); float dotLH = saturate( dot( lightDir, halfDir ) ); vec3 F = F_Schlick( specularColor, dotLH ); float G = G_BlinnPhong_Implicit( ); float D = D_BlinnPhong( shininess, dotNH ); return F * ( G * D ); } Physically-Based rendering Regarding to the lighting model of GGX, UE4 Shading presentation by
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