class light_map
{
public:
vector v0, v1, v2;
vector d0, d1, d2, normal;
float det;
float uv[3][2];
int lastupdate;
int pic;
int offsetx,offsety;
int sizex,sizey;
int facenum;
unsigned char *bmp;
int bytespixel,bytesx,bytesxy;
light_map(int f,int p,int x,int y,int sx,int sy,int bp=3)
{
facenum=f;
pic=p;
offsetx=x;
offsety=y;
sizex=sx;
sizey=sy;
bytespixel=bp;
lastupdate=0;
bytesx=sx*bp;
if (bytesx&3)
bytesx+=4-(bytesx&3);
bytesxy=bytesx*sy;
bmp=new unsigned char[bytesxy];
};
void map_point(float u, float v, vector &point);
void set_base(face *f,light_map_pic *lmp,vector&
pos=vector(0,0,0));
void illum(vector& pos,vector& color,float rad,int shadows);
void load(light_map_pic *lmp);
void save(light_map_pic *lmp);
virtual ~light_map()
{
if (bmp)
delete bmp;
};
};
| Member | Type | Description |
|---|---|---|
| d0 | vector | light_map origin (0,0) in world space |
| d1 | vector | light_map u vector (1,0) in world space |
| d2 | vector | light_map v vector (0,1) in world space |
| lastupdate | int | last frame this light_map has changed |
| pic | int | light_map_pic index |
| offsetx | int | x offset into light_map_pic |
| offsety | int | y offset into light_map_pic |
| sizex | int | x size of light_map (power of 2 or not) |
| sizey | int | y size of light_map (power of 2 or not) |
| facenum | int | face index for one face using this light_map |
| bmp | unsigned char * | light_map bitmap |
| bytespixel | int | the light map bytes per pixel: 3 - RGB 4 - RGBA |
| bytesx | int | number of bytes per line (sizex*bytespixel aligned to 4 bytes) |
| bytesxy | int | total bytes of the light_map bmp (bytesx*sizey) |
constructor, map_point, set_base, illum, load, save
This class implements a light map. Several faces (co-planar) can share the same light_map and many light_maps can share the same light_map_pic. Each light_map has an offset and size inside its light_map_pic.