R2PositionReconstruction.h File Reference

Functions for performing position reconstruction during deferred rendering. More...

#include "R2Bilinear.h"
#include "R2ViewRays.h"

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Functions
vec4	R2_positionReconstructFromEyeZ (const float eye_z, const vec2 uv, const R2_view_rays_t view_rays)

Detailed Description

Functions for performing position reconstruction during deferred rendering.

Definition in file R2PositionReconstruction.h.

Function Documentation

R2_positionReconstructFromEyeZ()

vec4 R2_positionReconstructFromEyeZ	(	const float	eye_z,
		const vec2	uv,
		const R2_view_rays_t	view_rays
	)

Reconstruct an eye-space position from the given parameters.

Parameters

eye_z	The eye-space Z value of the position
uv	The current position on the screen in UV coordinates
view_rays	The current set of view rays

Definition at line 19 of file R2PositionReconstruction.h.

{
  vec3 origin =
    R2_bilinearInterpolate3(
      view_rays.origin_x0y0,
      view_rays.origin_x1y0,
      view_rays.origin_x0y1,
      view_rays.origin_x1y1,
      uv
    );

  vec3 ray_normal =
    R2_bilinearInterpolate3(
      view_rays.ray_x0y0,
      view_rays.ray_x1y0,
      view_rays.ray_x0y1,
      view_rays.ray_x1y1,
      uv
    );

  vec3 ray =
    (ray_normal * eye_z) + origin;

  return vec4 (ray, 1.0);
}