get_arg_vec3

Description:

public void get_arg_vec3 (Bytes args, int idx, Vec3 out_value)

Gets the value of the uniform idx in the args block.

Note:

GTK's new Vulkan-focused rendering does not support this feature. Use [GtkGLArea](../gtk4/class.GLArea.html) for OpenGL rendering.

The uniform must be of vec3 type.

Parameters:

this

a `GskGLShader`
args

uniform arguments
idx

index of the uniform
out_value

location to store the uniform value in