With this function you can set the current mip filter mode to one of the three types supported. You give the constant that refers to the mip filtering mode that you require, where you can choose between point filtering (default setting, meaning no filtering), linear filtering (this is also known as trilinear filtering) or aniostropic filtering (see the constants table below).
常量 描述 tf_point This will disable the filtering between mipmap levels, which can cause visible texture transitions, but gives the best performance. tf_linear This will enable linear filtering between mipmap levels (this is also known as trilinear filtering), which smooths the texture transitions, but it will give a minor hit to performance. tf_anisotropic This will enable anisotropic filtering between mipmap levels, which greatly improves texture transition quality and can reduce the blurring visible with other filtering modes, but it has the highest hit on performance.
|filter||The mip filter mode to use (a constant, default: tf_point).|
case tf_point: gpu_set_tex_mip_filter(tf_linear); break;
case tf_linear: gpu_set_tex_mip_filter(tf_anisotropic); break;
case tf_anisotropic: gpu_set_tex_mip_filter(tf_point); break;
The above code checks the keyboard and if the specified key is pressed it will then get the current mip filter and toggle the value to the next one, cycling through the different modes.