摘要： Backgroud Since the value of the sums can get quite large, the table entries require extended precision. The number of bits of precision needed per co 阅读全文

摘要： Floating-Point Roundoff Error 表示 A rule of thumb is that 32-bit single-precision numbers have about seven accurate decimal digits, and 64-bit double-p 阅读全文

摘要： Harmonic Polynomial Recall the Dirichlet problem for the ball in \(\mathbf R^n\): given \(f\in C(S)\), find \(u\in C(\overline{B})\) such that \(u\) i 阅读全文

摘要： Definitions and Examples A twice continuously differentiable, complex‑valued function \(u\) defined on \(\Omega\) is \(\textit{harmonic}\) on \(\Omega 阅读全文

摘要： Light Mode 参考子: Introduction to 3D Game Programming with directx12 Diffuse Light The light will bounce around in the interior, where some of it will b 阅读全文

摘要： 行主序矩阵与列主序矩阵 首先要了解的是，对于连续内存数据： \[m_{11}\ m_{12}\ m_{13}\ m_{14}\ m_{21}\ m_{22}\ m_{23}\ m_{24}\ m_{31}\ m_{32}\ m_{33}\ m_{34}\ m_{41}\ m_{42}\ m_{43} 阅读全文

摘要： 第一步 第二步 转到NDC: 因为目前只有 \(-1 \le y' \le 1\),对于 \(x'\)可以除与\(r\) 所以: \[x' = \frac{x}{rz \tan(\alpha/2)} \tag{eq. 5.1} \]\[y' = \frac{y}{z \tan(\alpha/2)} 阅读全文

摘要： P_camera.x = dot(P - eye, right) P_camera.y = dot(P - eye, up) P_camera.z = dot(P - eye, forward) // 展开矩阵形式： [ P_camera.x ] [ right.x right.y right.z 阅读全文

摘要： Progressive Path Tracing with Explicit Light Sampling 来源 There are multiple areas in path tracing that can be importance sampled. In addition, each of 阅读全文

摘要： 地理坐标系(Geographic coordinate system)：就是椭球体的球面坐标系统。椭球体具有特点：具有长半轴，短半轴，偏心率。以经纬度线划分表面区域，和定位坐标。 投影坐标体系：实质上是一个平面坐标系统，就是将椭球体表面的空间坐标投影到一个平面上的坐标体系。就是我们常用的地图坐标。也 阅读全文