Shaders

Setting up shaders happens when calling init_window, here the arguments uniform_enum, attribute_enum and shader_folder dertermine what uniforms are allowed, what attributes are allowed and what folder shaders are loaded from. uniform_enum and attribute_enum are required but shader_folder can optionally be set to nil. This will result in furbs not loading any shaders from the files system. Passing nil for shader_folder will disable the following functionality:

• Hot reloading shaders (reload_shaders)
• The include statement in the shader

A shader (vs or fs) can be loaded manually by calling ?????_shader. ?????_shader takes in a name for the shader, this name is used to identify the shader when calling load_shader.

load_shader will create a shader program consisting of the named vertex/frament code. Geometry shaders are not supported in furbs. Tessellation shaders are planed, but not yet developed.

Shaders are written in GLSL and with the ability to include other files into the shader with the include statement (disabled if shader_folder is nil).

A shader shall be bound before drawing a mesh and is bound with bind_shader and unbound with unbind_shader. A camera must be setup with begin_mode_2D/begin_mode_3D before the shader is bound. Binding the shader will update the following uniforms:

• prj_mat
• inv_prj_mat
• view_mat
• inv_view_mat

notes

init_shaders is called by init_window, so it should not be called by the user.