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static struct flaretype
{
int type; /* flaretex index, 0..5, -1 for 6+random shine */
float loc; /* postion on axis */
float scale; /* texture scaling */
uchar alpha; /* color alpha */
} flaretypes[] =
{
{2, 1.30f, 0.04f, 153}, //flares
{3, 1.00f, 0.10f, 102},
{1, 0.50f, 0.20f, 77},
{3, 0.20f, 0.05f, 77},
{0, 0.00f, 0.04f, 77},
{5, -0.25f, 0.07f, 127},
{5, -0.40f, 0.02f, 153},
{5, -0.60f, 0.04f, 102},
{5, -1.00f, 0.03f, 51},
{-1, 1.00f, 0.30f, 255}, //shine - red, green, blue
{-2, 1.00f, 0.20f, 255},
{-3, 1.00f, 0.25f, 255}
};
struct flare
{
vec o, center;
float size;
uchar color[3];
bool sparkle;
};
VAR(flarelights, 0, 0, 1);
VARP(flarecutoff, 0, 1000, 10000);
VARP(flaresize, 20, 100, 500);
struct flarerenderer : partrenderer
{
int maxflares, numflares;
unsigned int shinetime;
flare *flares;
flarerenderer(const char *texname, int maxflares)
: partrenderer(texname, 3, PT_FLARE), maxflares(maxflares), shinetime(0)
{
flares = new flare[maxflares];
}
void reset()
{
numflares = 0;
}
void newflare(vec &o, const vec ¢er, uchar r, uchar g, uchar b, float mod, float size, bool sun, bool sparkle)
{
if(numflares >= maxflares) return;
vec target; //occlusion check (neccessary as depth testing is turned off)
if(!raycubelos(o, camera1->o, target)) return;
flare &f = flares[numflares++];
f.o = o;
f.center = center;
f.size = size;
f.color[0] = uchar(r*mod);
f.color[1] = uchar(g*mod);
f.color[2] = uchar(b*mod);
f.sparkle = sparkle;
}
void addflare(vec &o, uchar r, uchar g, uchar b, bool sun, bool sparkle)
{
//frustrum + fog check
if(isvisiblesphere(0.0f, o) > (sun?VFC_FOGGED:VFC_FULL_VISIBLE)) return;
//find closest point between camera line of sight and flare pos
vec flaredir = vec(o).sub(camera1->o);
vec center = vec(camdir).mul(flaredir.dot(camdir)).add(camera1->o);
float mod, size;
if(sun) //fixed size
{
mod = 1.0;
size = flaredir.magnitude() * flaresize / 100.0f;
}
else
{
mod = (flarecutoff-vec(o).sub(center).squaredlen())/flarecutoff;
if(mod < 0.0f) return;
size = flaresize / 5.0f;
}
newflare(o, center, r, g, b, mod, size, sun, sparkle);
}
void makelightflares()
{
numflares = 0; //regenerate flarelist each frame
shinetime = lastmillis/10;
if(editmode || !flarelights) return;
const vector<extentity *> &ents = entities::getents();
extern const vector<int> &checklightcache(int x, int y);
const vector<int> &lights = checklightcache(int(camera1->o.x), int(camera1->o.y));
loopv(lights)
{
entity &e = *ents[lights[i]];
if(e.type != ET_LIGHT) continue;
bool sun = (e.attr1==0);
float radius = float(e.attr1);
vec flaredir = vec(e.o).sub(camera1->o);
float len = flaredir.magnitude();
if(!sun && (len > radius)) continue;
if(isvisiblesphere(0.0f, e.o) > (sun?VFC_FOGGED:VFC_FULL_VISIBLE)) continue;
vec center = vec(camdir).mul(flaredir.dot(camdir)).add(camera1->o);
float mod, size;
if(sun) //fixed size
{
mod = 1.0;
size = len * flaresize / 100.0f;
}
else
{
mod = (radius-len)/radius;
size = flaresize / 5.0f;
}
newflare(e.o, center, e.attr2, e.attr3, e.attr4, mod, size, sun, sun);
}
}
int count()
{
return numflares;
}
bool haswork()
{
return (numflares != 0) && !glaring && !reflecting && !refracting;
}
void render()
{
glDisable(GL_FOG);
defaultshader->set();
glDisable(GL_DEPTH_TEST);
if(!tex) tex = textureload(texname);
glBindTexture(GL_TEXTURE_2D, tex->id);
glBegin(GL_QUADS);
loopi(numflares)
{
flare *f = flares+i;
vec center = f->center;
vec axis = vec(f->o).sub(center);
uchar color[4] = {f->color[0], f->color[1], f->color[2], 255};
loopj(f->sparkle?12:9)
{
const flaretype &ft = flaretypes[j];
vec o = vec(axis).mul(ft.loc).add(center);
float sz = ft.scale * f->size;
int tex = ft.type;
if(ft.type < 0) //sparkles - always done last
{
shinetime = (shinetime + 1) % 10;
tex = 6+shinetime;
color[0] = 0;
color[1] = 0;
color[2] = 0;
color[-ft.type-1] = f->color[-ft.type-1]; //only want a single channel
}
color[3] = ft.alpha;
glColor4ubv(color);
const float tsz = 0.25; //flares are aranged in 4x4 grid
float tx = tsz*(tex&0x03);
float ty = tsz*((tex>>2)&0x03);
glTexCoord2f(tx, ty+tsz); glVertex3f(o.x+(-camright.x+camup.x)*sz, o.y+(-camright.y+camup.y)*sz, o.z+(-camright.z+camup.z)*sz);
glTexCoord2f(tx+tsz, ty+tsz); glVertex3f(o.x+( camright.x+camup.x)*sz, o.y+( camright.y+camup.y)*sz, o.z+( camright.z+camup.z)*sz);
glTexCoord2f(tx+tsz, ty); glVertex3f(o.x+( camright.x-camup.x)*sz, o.y+( camright.y-camup.y)*sz, o.z+( camright.z-camup.z)*sz);
glTexCoord2f(tx, ty); glVertex3f(o.x+(-camright.x-camup.x)*sz, o.y+(-camright.y-camup.y)*sz, o.z+(-camright.z-camup.z)*sz);
}
}
glEnd();
glEnable(GL_DEPTH_TEST);
glEnable(GL_FOG);
}
//square per round hole - use addflare(..) instead
particle *addpart(const vec &o, const vec &d, int fade, int color, float size, int gravity = 0) { return NULL; }
};
static flarerenderer flares("<grey>packages/particles/lensflares.png", 64);
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