A shader or an instance of the SKShader
class is an object that represents an Open Graphics Library Embedded Systems (OpenGL ES) or (GLES). It is a fragment shader, which is an algorithm that modifies the drawing behavior of the node that it is applied to.
Note
Open Graphics Library (OpenGL) is an application programing interface that utilizes the Graphics Processing Unit (GPU) to render graphic elements.
You can use the effect shown in the following screenshot by applying shaders:
In order to apply a shader to a node, we need to create a SKShader
instance from a fragment shader
algorithm and assign it to the shader
property of the desired object.
The shader creation and compilation takes a big amount of CPU memory. So that's why we need to keep in mind the following things:
Avoid initializing shaders while the game is running; it's better to create them when the game is being launched
Avoid modifying the algorithm source of the shader as it will recompile the shader...