R2LightProjectiveLambertBlinnPhongShadowVariance.h File Reference

A projective light with Blinn-Phong specular highlights and a variance shadow. More...

#include "R2LightShaderMain.h"
#include "R2LightPositional.h"
#include "R2LightProjective.h"
#include "R2LightSpherical.h"
#include "R2ShadowVariance.h"

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Functions
R2_light_output_t	R2_deferredLightMain (const R2_reconstructed_surface_t surface)

Variables
uniform R2_light_positional_t	R2_light_projective
uniform R2_shadow_variance_t	R2_shadow_variance
uniform sampler2D	R2_light_projective_image
uniform mat4x4	R2_transform_eye_to_light_eye
uniform mat4x4	R2_transform_light_projection

Detailed Description

A projective light with Blinn-Phong specular highlights and a variance shadow.

Definition in file R2LightProjectiveLambertBlinnPhongShadowVariance.h.

Function Documentation

R2_deferredLightMain()

R2_light_output_t R2_deferredLightMain

(

const R2_reconstructed_surface_t

surface

)

Calculate light values for the current light, based on the current contents of the G-buffer.

Parameters

surface

Reconstructed surface data taken from the G-Buffer

Returns

Calculated light values

Definition at line 20 of file R2LightProjectiveLambertBlinnPhongShadowVariance.h.

{
  R2_light_projective_vectors_t vectors = R2_lightProjectiveVectors(
    R2_light_projective,
    surface.position.xyz,
    surface.normal,
    R2_transform_eye_to_light_eye,
    R2_transform_light_projection);

  float shadow =
    R2_varianceShadowFactor (R2_shadow_variance, vectors);

  float attenuation =
    R2_lightPositionalAttenuation(
      R2_light_projective,
      vectors.positional.distance) * vectors.back_projected * shadow;

  vec3 image_sample =
    texture (R2_light_projective_image, vectors.surface_light_uv).rgb;

  vec3 diffuse =
    R2_lightSphericalDiffuseLambertTerm (R2_light_projective, vectors.positional);
  vec3 specular =
    R2_lightSphericalSpecularBlinnPhongTerm(
      R2_light_projective,
      vectors.positional,
      surface.specular,
      surface.specular_exponent);

  return R2_light_output_t(
    diffuse * image_sample * attenuation,
    specular * image_sample * attenuation);
}