Rendering

a minute read (About 214 words)

算法过程

  • 设置晶格点,如以整数位置为晶格点

  • 为每个晶格点设定一个梯度值

  • 计算当前采样点位于哪些晶格点内部

  • 计算晶格点到采样点的向量,并与晶格点的梯度点乘

  • 将与各个晶格点的计算结果做插值,二维噪声就做个双线性插值

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4 minutes read (About 664 words)

Lambert Model

$$I_o = D * I_i\cos(\theta)$$

$$D = \frac{\rho_d}{\pi}$$

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18 minutes read (About 2684 words)

可见光

人眼的可见光波谱范围约为370nm~730nm

蓝光：400nm,绿光：550nm,红光：650nm

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a few seconds read (About 102 words)

Disney Diffuse BRDF

该模型为经验模型,目的是根据材质的roughness表现的不同,平滑的表面更暗一些,粗糙的表面亮一些

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14 minutes read (About 2035 words)

Reflectance equation

这里采用的反射模型如下:
$$L_o(p,\omega_o) = \int_\Omega (k_d \frac{c}{\pi} + k_s \frac{DFG}{4(\omega_o \cdot n)(\omega_i \cdot n)})L_i(p,\omega_i)(n \cdot \omega_i) d\omega_i$$

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