#5336 Score: 1
cmc233
Participant
6 pts

渲染图上x轴方向相邻两个点是(x,y),(x+dx,y),它们之间的距离是dx,其对应的纹理坐标分别是(u,v),(u+du,v+dv),距离是sqrt(du^2+dv^2),这个l算的是这两个距离的比例,然后在Mipmap log_2(L) 层找贴图颜色(相当于是把纹理贴图缩小 2的log_2(L)倍,从而使渲染图和纹理贴图比例相当)

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