mirror of
https://github.com/ptitSeb/Serious-Engine
synced 2024-11-25 11:45:53 +01:00
94 lines
3.0 KiB
C
94 lines
3.0 KiB
C
|
/*
|
||
|
|
* LWSDK Header File
|
||
|
|
* Copyright 1999, NewTek, Inc.
|
||
|
|
*
|
||
|
|
* LWVOLUME.H -- LightWave Volumetric Elements
|
||
|
|
*
|
||
|
|
* This header defines the volumetric rendering element.
|
||
|
|
*/
|
||
|
|
#ifndef LWSDK_VOLUME_H
|
||
|
|
#define LWSDK_VOLUME_H
|
||
|
|
|
||
|
|
#include <lwrender.h>
|
||
|
|
|
||
|
|
#define LWVOLUMETRIC_HCLASS "VolumetricHandler"
|
||
|
|
#define LWVOLUMETRIC_ICLASS "VolumetricInterface"
|
||
|
|
#define LWVOLUMETRIC_VERSION 4
|
||
|
|
|
||
|
|
|
||
|
|
/*
|
||
|
|
* A volume sample is a single segment along a ray through a
|
||
|
|
* volmetric function that has a uniform color and opacity. The
|
||
|
|
* dist and stride are the position and size of the sample and
|
||
|
|
* the opacity and color are given as color vectors.
|
||
|
|
*/
|
||
|
|
typedef struct st_LWVolumeSample {
|
||
|
|
double dist;
|
||
|
|
double stride;
|
||
|
|
double opacity[3];
|
||
|
|
double color[3];
|
||
|
|
} LWVolumeSample;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Volumetric ray access structure is passed to the volume rendering
|
||
|
|
* server to add its contribution to a ray passing through space. The
|
||
|
|
* ray is given by a void pointer.
|
||
|
|
*
|
||
|
|
* flags evaluation falgs. Indicates whether color or opacity or
|
||
|
|
* both should be computed.
|
||
|
|
*
|
||
|
|
* source origin of ray. Can be a light, the camera, or an object
|
||
|
|
* (for surface rendering).
|
||
|
|
*
|
||
|
|
* o,dir origin and direction of ray.
|
||
|
|
*
|
||
|
|
* rayColor color that is viewed from the origin of the ray, before
|
||
|
|
* volumetric effects are applied.
|
||
|
|
*
|
||
|
|
* far,near far and near clipping distances.
|
||
|
|
*
|
||
|
|
* oDist distance from origin (>0 when raytracing reflections /
|
||
|
|
* refractions).
|
||
|
|
*
|
||
|
|
* frustum pixel frustum.
|
||
|
|
*
|
||
|
|
* addSample add a new volume sample to the ray.
|
||
|
|
*
|
||
|
|
* getOpacity returns opacity (vector and scalar) at specified distance.
|
||
|
|
*/
|
||
|
|
typedef struct st_LWVolumeAccess {
|
||
|
|
void *ray;
|
||
|
|
int flags;
|
||
|
|
LWItemID source;
|
||
|
|
|
||
|
|
double o[3], dir[3], rayColor[3];
|
||
|
|
double farClip,nearClip;
|
||
|
|
double oDist, frustum;
|
||
|
|
|
||
|
|
void (*addSample) (void *ray, LWVolumeSample *smp);
|
||
|
|
double (*getOpacity) (void *ray, double dist, double opa[3]);
|
||
|
|
|
||
|
|
LWIlluminateFunc *illuminate;
|
||
|
|
LWRayTraceFunc *rayTrace;
|
||
|
|
LWRayCastFunc *rayCast;
|
||
|
|
LWRayShadeFunc *rayShade;
|
||
|
|
} LWVolumeAccess;
|
||
|
|
|
||
|
|
#define LWVEF_OPACITY (1<<0) // light attenuation is evaluated
|
||
|
|
#define LWVEF_COLOR (1<<1) // light scattering is evaluated
|
||
|
|
#define LWVEF_RAYTRACE (1<<2) // raytracing context
|
||
|
|
|
||
|
|
typedef struct st_LWVolumetricHandler {
|
||
|
|
LWInstanceFuncs *inst;
|
||
|
|
LWItemFuncs *item;
|
||
|
|
LWRenderFuncs *rend;
|
||
|
|
double (*evaluate) (LWInstance, LWVolumeAccess *);
|
||
|
|
unsigned int (*flags) (LWInstance);
|
||
|
|
} LWVolumetricHandler;
|
||
|
|
|
||
|
|
#define LWVOLF_SHADOWS (1<<0) // element will be evaluated for shadows
|
||
|
|
#define LWVOLF_REFLECTIONS (1<<1) // element will be evaluated for raytraced reflections
|
||
|
|
#define LWVOLF_REFRACTIONS (1<<2) // element will be evaluated for raytraced refractions
|
||
|
|
|
||
|
|
#endif
|