mirror of
https://github.com/ptitSeb/Serious-Engine
synced 2024-11-24 11:20:27 +01:00
85 lines
3.4 KiB
C
85 lines
3.4 KiB
C
|
/*
|
||
|
|
* LWSDK Header File
|
||
|
|
* Copyright 1999, NewTek, Inc.
|
||
|
|
*
|
||
|
|
* LWTEXTURE.H -- LightWave Procedural Textures
|
||
|
|
*
|
||
|
|
* This header defines the procedural texture render handler. These
|
||
|
|
* are the building blocks of texture channel layers.
|
||
|
|
*/
|
||
|
|
#ifndef LWSDK_TEXTURE_H
|
||
|
|
#define LWSDK_TEXTURE_H
|
||
|
|
|
||
|
|
#include <lwrender.h>
|
||
|
|
|
||
|
|
#define LWTEXTURE_HCLASS "TextureHandler"
|
||
|
|
#define LWTEXTURE_ICLASS "TextureInterface"
|
||
|
|
#define LWTEXTURE_VERSION 5
|
||
|
|
|
||
|
|
/*
|
||
|
|
wPos: coordinates in world space, these are the raw coordinates unaffected by any transformation.
|
||
|
|
|
||
|
|
tPos: coordinates in texture space. This is the coordinates that will most likeley be used
|
||
|
|
by the server, the result from the transformation set by the user (scale, position, etc.)
|
||
|
|
|
||
|
|
size: scale of the texture in the 3 directions. This is sometimes usefull for antialiasing.
|
||
|
|
amp: amplitude of the texture. This information can also be used for antialiasing.
|
||
|
|
spotSize: for antialiasing.
|
||
|
|
|
||
|
|
txGrad: this is a return vector in case the server knows how to compute the gradient itself. This
|
||
|
|
value will only be used if the server returns the LWTEXF_GRAD flag.
|
||
|
|
|
||
|
|
axis: which dimensions are being evaluated. Usually it will be AXIS_X | AXIS_Y | AXIS_Z, though it
|
||
|
|
might change in some situations if the texture is evaluated for example in a 2D or 1D context.
|
||
|
|
|
||
|
|
octaves: this is the number of octaves in the fractal texture required by HV. This is how HV
|
||
|
|
maintains a constant level of detail based on the distance from the viewer. This should be discarded
|
||
|
|
for non fractal textures.
|
||
|
|
|
||
|
|
txRGBA: this is the return color and alpha value in case the texture outputs its own color.
|
||
|
|
|
||
|
|
Note: when returning a gradient or a color, the texture should also return the texture value at that
|
||
|
|
point. This value can be thought of as the altitude of the texture at that point.
|
||
|
|
|
||
|
|
*/
|
||
|
|
typedef struct st_LWTextureAccess {
|
||
|
|
double wPos[3],tPos[3],size[3],amp; // input
|
||
|
|
double spotSize; // input
|
||
|
|
double txGrad[3]; // output
|
||
|
|
int axis,flags; // input
|
||
|
|
double octaves; // input
|
||
|
|
double txRGBA[4]; // output
|
||
|
|
} LWTextureAccess;
|
||
|
|
|
||
|
|
typedef struct st_LWTextureHandler {
|
||
|
|
LWInstanceFuncs *inst;
|
||
|
|
LWItemFuncs *item;
|
||
|
|
LWRenderFuncs *rend;
|
||
|
|
double (*evaluate) (LWInstance, LWTextureAccess *);
|
||
|
|
unsigned int (*flags) (LWInstance);
|
||
|
|
} LWTextureHandler;
|
||
|
|
|
||
|
|
/*
|
||
|
|
These are the server flags
|
||
|
|
*/
|
||
|
|
#define LWTEXF_GRAD (1<<0) /* texture returns its own gradient */
|
||
|
|
#define LWTEXF_SLOWPREVIEW (1<<1) /* texture editor preview will be delayed */
|
||
|
|
#define LWTEXF_AXIS (1<<2) /* texture needs an axis control */
|
||
|
|
#define LWTEXF_AALIAS (1<<3) /* texture is naturally antialiased */
|
||
|
|
#define LWTEXF_DISPLACE (1<<4) /* texture is available for displacement */
|
||
|
|
#define LWTEXF_HV_SRF (1<<5) /* texture is available for HV surfaces */
|
||
|
|
#define LWTEXF_HV_VOL (1<<6) /* texture is available for HV volumes */
|
||
|
|
#define LWTEXF_SELF_COLOR (1<<7) /* texture returns its own color */
|
||
|
|
|
||
|
|
/*
|
||
|
|
These are the evaluation flags passed in the TextureAccess
|
||
|
|
*/
|
||
|
|
#define LWTXEF_VECTOR (1<<0) /* vector (=bump) evaluation context */
|
||
|
|
#define LWTXEF_AXISX (1<<1)
|
||
|
|
#define LWTXEF_AXISY (1<<2)
|
||
|
|
#define LWTXEF_AXISZ (1<<3)
|
||
|
|
#define LWTXEF_DISPLACE (1<<4) /* displacement evaluation context */
|
||
|
|
#define LWTXEF_COLOR (1<<5) /* color evaluation context */
|
||
|
|
|
||
|
|
#endif
|