R2SurfaceShaderMain.h File Reference

The main function that all deferred surface shaders must implement. More...

#include "R2SurfaceTypes.h"
#include "R2View.h"

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Functions
R2_surface_output_t	R2_deferredSurfaceMain (const R2_vertex_data_t data, const R2_surface_derived_t derived, const R2_surface_textures_t textures, const R2_view_t view, const R2_surface_matrices_instance_t matrices_instance)

Detailed Description

The main function that all deferred surface shaders must implement.

Definition in file R2SurfaceShaderMain.h.

Function Documentation

R2_deferredSurfaceMain()

R2_surface_output_t R2_deferredSurfaceMain	(	const R2_vertex_data_t	data,
		const R2_surface_derived_t	derived,
		const R2_surface_textures_t	textures,
		const R2_view_t	view,
		const R2_surface_matrices_instance_t	matrices_instance
	)

Calculate surface values for the current surface. Implementations of this function are expected to calculate a description of the current surface. The description is encoded into the G-buffer by the caller.

Parameters

data	Surface data (typically coming from a vertex)
derived	Surface data calculated from the original vertex
textures	Textures that are required by all surfaces
view	Matrices and parameters related to the current view
matrices_instance	Matrices related to the instance to which this surface belongs

Returns

Calculated surface values

Definition at line 14 of file R2SurfaceBasic.h.

{
  vec4 albedo_sample =
    texture (R2_basic_surface_textures.albedo, data.uv);
  vec4 surface =
    mix (R2_basic_surface_parameters.albedo_color,
         albedo_sample,
         R2_basic_surface_parameters.albedo_mix * albedo_sample.w);

  float emission_sample =
    texture (R2_basic_surface_textures.emission, data.uv).x;
  float emission =
    R2_basic_surface_parameters.emission_amount * emission_sample;

  vec3 specular_sample =
    texture (R2_basic_surface_textures.specular, data.uv).xyz;
  vec3 specular =
    specular_sample * R2_basic_surface_parameters.specular_color;

  bool discarded =
    surface.w < R2_basic_surface_parameters.alpha_discard_threshold;

  return R2_surface_output_t (
    surface.xyz,
    emission,
    derived.normal_bumped,
    specular,
    R2_basic_surface_parameters.specular_exponent,
    discarded
  );
}