fhrt_equi_isoval_fine.c File Reference

Handles Isovalue-Firsthit-rendermode. More...

#include "rendermodes.h"
#include "macros_isoval.h"
#include "macros_equi.h"

Defines
#define	TEST_FHRT_EQUI_ISOVAL_FINE
#define	skymap_lookup(ftmpv, sc_off, zoff)
Functions
void	fhrt_equi_isoval_fine (rendersurf *rtsurf, uint32_t *voxel, float *ipos, float *ifor, float *iup, float *istr)
	Generate rays to cover the screen.
Variables
int	pos_x
int	pos_y
int	pos_z
float	ftmpv [4]
float	ftmpv_CUBE [4]
float	add_x [3]
float	add_y [3]
int	ADAPT_STEP
SDL_Surface *	sky
uint32_t *	sdata

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Detailed Description

Handles Isovalue-Firsthit-rendermode.

Binary search is employed in the area of interest to increase accuracy without a big hit on performance.

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Function Documentation

void fhrt_equi_isoval_fine (  rendersurf *  rtsurf, uint32_t *  voxel, float *  ipos, float *  ifor, float *  iup, float *  istr )

Generate rays to cover the screen. A ray is generated for every pixel. Parameters: rtsurf  Pointer to surface to draw to. voxel  Pointer to the 3D dataset. ipos  Pointer to the camera-position. ifor  Pointer to the camera-viewvector. iup  Pointer to the camera-upvector. istr  Pointer to the camera-strafevector.

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