fhrt_noip_adapt.c File Reference

Handles basic non-lit cuberille-mode(s). More...

#include "rendermodes.h"

Defines
#define	REFINE
#define	SPIVIS
#define	TEST_FHRT_NOIP_ADAPT
#define	skymap_lookup(ftmpv, sc_off, zoff)
#define	FOURER
Functions
int	intersect_noip_adapt (float *vec, float *ipos, float *isect)
	Intersect ray with Boundind-Box of Volume.
void	fhrt_noip_adapt (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
unsigned char	diffborder
	unsigned char diffborder=10;
SDL_Surface *	sky
uint32_t *	sdata
int	dist_estimate
int	isect_pos

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Detailed Description

Handles basic non-lit cuberille-mode(s).

There is also an option to show the occlusion-data only.

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Function Documentation

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

Generate rays to cover the screen. A simple adaptive raycasting-scheme is followed here. If the colors of adjacent coarse-grid-scanpoint differ too much, then new rays are cast. This happens "recursively" until either small enough blocks are reached, or the pixels don't differ too much and can therefore be filled with the "unique" color of the 4 adjacents pixels. 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.

int intersect_noip_adapt (  float *  vec, float *  ipos, float *  isect )

Intersect ray with Boundind-Box of Volume. Parameters: vec  Pointer to current ray-vector. ipos  Pointer to the eye-position. isect  Pointer to the intersection-point. Returns: Returns 1 if ray intersects volume and 0 if not

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