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-rw-r--r--src/engine/grass.cpp356
1 files changed, 0 insertions, 356 deletions
diff --git a/src/engine/grass.cpp b/src/engine/grass.cpp
deleted file mode 100644
index 58d9ee5..0000000
--- a/src/engine/grass.cpp
+++ /dev/null
@@ -1,356 +0,0 @@
-#include "engine.h"
-
-VARP(grass, 0, 0, 1);
-VAR(dbggrass, 0, 0, 1);
-VARP(grassdist, 0, 256, 10000);
-FVARP(grasstaper, 0, 0.2, 1);
-FVARP(grassstep, 0.5, 3, 8);
-VARP(grassheight, 1, 4, 64);
-VARP(grassmargin, 0, 8, 32);
-FVAR(grassmarginfade, 0, 0.5f, 1);
-
-#define NUMGRASSWEDGES 8
-
-static struct grasswedge
-{
- vec dir, across, edge1, edge2;
- plane bound1, bound2;
- bvec4 vertbounds;
-
- grasswedge(int i) :
- dir(2*M_PI*(i+0.5f)/float(NUMGRASSWEDGES), 0),
- across(2*M_PI*((i+0.5f)/float(NUMGRASSWEDGES) + 0.25f), 0),
- edge1(vec(2*M_PI*i/float(NUMGRASSWEDGES), 0).div(cos(M_PI/NUMGRASSWEDGES))),
- edge2(vec(2*M_PI*(i+1)/float(NUMGRASSWEDGES), 0).div(cos(M_PI/NUMGRASSWEDGES))),
- bound1(vec(2*M_PI*(i/float(NUMGRASSWEDGES) - 0.25f), 0), 0),
- bound2(vec(2*M_PI*((i+1)/float(NUMGRASSWEDGES) + 0.25f), 0), 0)
- {
- across.div(-across.dot(bound1));
-
- bvec vertbound1(bound1), vertbound2(bound2);
- vertbounds = bvec4(vertbound1.x, vertbound1.y, vertbound2.x, vertbound2.y);
- vertbounds.flip();
- }
-} grasswedges[NUMGRASSWEDGES] = { 0, 1, 2, 3, 4, 5, 6, 7 };
-
-struct grassvert
-{
- vec pos;
- bvec4 color;
- vec2 tc;
- svec2 lm;
- bvec4 bounds;
-};
-
-static vector<grassvert> grassverts;
-static GLuint grassvbo = 0;
-static int grassvbosize = 0;
-
-struct grassgroup
-{
- const grasstri *tri;
- float dist;
- int tex, lmtex, offset, numquads;
-};
-
-static vector<grassgroup> grassgroups;
-
-#define NUMGRASSOFFSETS 32
-
-static float grassoffsets[NUMGRASSOFFSETS] = { -1 }, grassanimoffsets[NUMGRASSOFFSETS];
-static int lastgrassanim = -1;
-
-VARR(grassanimmillis, 0, 3000, 60000);
-FVARR(grassanimscale, 0, 0.03f, 1);
-
-static void animategrass()
-{
- loopi(NUMGRASSOFFSETS) grassanimoffsets[i] = grassanimscale*sinf(2*M_PI*(grassoffsets[i] + lastmillis/float(grassanimmillis)));
- lastgrassanim = lastmillis;
-}
-
-VARR(grassscale, 1, 2, 64);
-bvec grasscolor(255, 255, 255);
-HVARFR(grasscolour, 0, 0xFFFFFF, 0xFFFFFF,
-{
- if(!grasscolour) grasscolour = 0xFFFFFF;
- grasscolor = bvec((grasscolour>>16)&0xFF, (grasscolour>>8)&0xFF, grasscolour&0xFF);
-});
-FVARR(grassalpha, 0, 1, 1);
-
-static void gengrassquads(grassgroup *&group, const grasswedge &w, const grasstri &g, Texture *tex)
-{
- float t = camera1->o.dot(w.dir);
- int tstep = int(ceil(t/grassstep));
- float tstart = tstep*grassstep,
- t0 = w.dir.dot(g.v[0]), t1 = w.dir.dot(g.v[1]), t2 = w.dir.dot(g.v[2]), t3 = w.dir.dot(g.v[3]),
- tmin = min(min(t0, t1), min(t2, t3)),
- tmax = max(max(t0, t1), max(t2, t3));
- if(tmax < tstart || tmin > t + grassdist) return;
-
- int minstep = max(int(ceil(tmin/grassstep)) - tstep, 1),
- maxstep = int(floor(min(tmax, t + grassdist)/grassstep)) - tstep,
- numsteps = maxstep - minstep + 1;
-
- float texscale = (grassscale*tex->ys)/float(grassheight*tex->xs), animscale = grassheight*texscale;
- vec tc;
- tc.cross(g.surface, w.dir).mul(texscale);
-
- int offset = tstep + maxstep;
- if(offset < 0) offset = NUMGRASSOFFSETS - (-offset)%NUMGRASSOFFSETS;
- offset += numsteps + NUMGRASSOFFSETS - numsteps%NUMGRASSOFFSETS;
-
- float leftdist = t0;
- const vec *leftv = &g.v[0];
- if(t1 > leftdist) { leftv = &g.v[1]; leftdist = t1; }
- if(t2 > leftdist) { leftv = &g.v[2]; leftdist = t2; }
- if(t3 > leftdist) { leftv = &g.v[3]; leftdist = t3; }
- float rightdist = leftdist;
- const vec *rightv = leftv;
-
- vec across(w.across.x, w.across.y, g.surface.zdelta(w.across)), leftdir(0, 0, 0), rightdir(0, 0, 0), leftp = *leftv, rightp = *rightv;
- float taperdist = grassdist*grasstaper,
- taperscale = 1.0f / (grassdist - taperdist),
- dist = maxstep*grassstep + tstart,
- leftb = 0, rightb = 0, leftdb = 0, rightdb = 0;
- for(int i = maxstep; i >= minstep; i--, offset--, leftp.add(leftdir), rightp.add(rightdir), leftb += leftdb, rightb += rightdb, dist -= grassstep)
- {
- if(dist <= leftdist)
- {
- const vec *prev = leftv;
- float prevdist = leftdist;
- if(--leftv < g.v) leftv += g.numv;
- leftdist = leftv->dot(w.dir);
- if(dist <= leftdist)
- {
- prev = leftv;
- prevdist = leftdist;
- if(--leftv < g.v) leftv += g.numv;
- leftdist = leftv->dot(w.dir);
- }
- leftdir = vec(*leftv).sub(*prev);
- leftdir.mul(grassstep/-w.dir.dot(leftdir));
- leftp = vec(leftdir).mul((prevdist - dist)/grassstep).add(*prev);
- leftb = w.bound1.dist(leftp);
- leftdb = w.bound1.dot(leftdir);
- }
- if(dist <= rightdist)
- {
- const vec *prev = rightv;
- float prevdist = rightdist;
- if(++rightv >= &g.v[g.numv]) rightv = g.v;
- rightdist = rightv->dot(w.dir);
- if(dist <= rightdist)
- {
- prev = rightv;
- prevdist = rightdist;
- if(++rightv >= &g.v[g.numv]) rightv = g.v;
- rightdist = rightv->dot(w.dir);
- }
- rightdir = vec(*rightv).sub(*prev);
- rightdir.mul(grassstep/-w.dir.dot(rightdir));
- rightp = vec(rightdir).mul((prevdist - dist)/grassstep).add(*prev);
- rightb = w.bound2.dist(rightp);
- rightdb = w.bound2.dot(rightdir);
- }
- vec p1 = leftp, p2 = rightp;
- if(leftb > grassmargin)
- {
- if(w.bound1.dist(p2) >= grassmargin) continue;
- p1.add(vec(across).mul(leftb - grassmargin));
- }
- if(rightb > grassmargin)
- {
- if(w.bound2.dist(p1) >= grassmargin) continue;
- p2.sub(vec(across).mul(rightb - grassmargin));
- }
-
- if(!group)
- {
- group = &grassgroups.add();
- group->tri = &g;
- group->tex = tex->id;
- extern bool brightengeom;
- extern int fullbright;
- int lmid = brightengeom && (g.lmid < LMID_RESERVED || (fullbright && editmode)) ? (int) LMID_BRIGHT : (int) g.lmid;
- group->lmtex = lightmaptexs.inrange(lmid) ? lightmaptexs[lmid].id : notexture->id;
- group->offset = grassverts.length()/4;
- group->numquads = 0;
- if(lastgrassanim!=lastmillis) animategrass();
- }
-
- group->numquads++;
-
- float tcoffset = grassoffsets[offset%NUMGRASSOFFSETS],
- animoffset = animscale*grassanimoffsets[offset%NUMGRASSOFFSETS],
- tc1 = tc.dot(p1) + tcoffset, tc2 = tc.dot(p2) + tcoffset,
- fade = dist - t > taperdist ? (grassdist - (dist - t))*taperscale : 1,
- height = grassheight * fade;
- svec2 lm1(short(g.tcu.dot(p1)), short(g.tcv.dot(p1))),
- lm2(short(g.tcu.dot(p2)), short(g.tcv.dot(p2)));
- bvec4 color(grasscolor, uchar(fade*grassalpha*255));
-
- #define GRASSVERT(n, tcv, modify) { \
- grassvert &gv = grassverts.add(); \
- gv.pos = p##n; \
- gv.color = color; \
- gv.tc = vec2(tc##n, tcv); \
- gv.lm = lm##n; \
- gv.bounds = w.vertbounds; \
- modify; \
- }
-
- GRASSVERT(2, 0, { gv.pos.z += height; gv.tc.x += animoffset; });
- GRASSVERT(1, 0, { gv.pos.z += height; gv.tc.x += animoffset; });
- GRASSVERT(1, 1, );
- GRASSVERT(2, 1, );
- }
-}
-
-static void gengrassquads(vtxarray *va)
-{
- loopv(va->grasstris)
- {
- grasstri &g = va->grasstris[i];
- if(isfoggedsphere(g.radius, g.center)) continue;
- float dist = g.center.dist(camera1->o);
- if(dist - g.radius > grassdist) continue;
-
- Slot &s = *lookupvslot(g.texture, false).slot;
- if(!s.grasstex)
- {
- if(!s.autograss) continue;
- s.grasstex = textureload(s.autograss, 2);
- }
-
- grassgroup *group = NULL;
- loopi(NUMGRASSWEDGES)
- {
- grasswedge &w = grasswedges[i];
- if(w.bound1.dist(g.center) > g.radius + grassmargin || w.bound2.dist(g.center) > g.radius + grassmargin) continue;
- gengrassquads(group, w, g, s.grasstex);
- }
- if(group) group->dist = dist;
- }
-}
-
-static inline bool comparegrassgroups(const grassgroup &x, const grassgroup &y)
-{
- return x.dist > y.dist;
-}
-
-void generategrass()
-{
- if(!grass || !grassdist) return;
-
- grassgroups.setsize(0);
- grassverts.setsize(0);
-
- if(grassoffsets[0] < 0) loopi(NUMGRASSOFFSETS) grassoffsets[i] = rnd(0x1000000)/float(0x1000000);
-
- loopi(NUMGRASSWEDGES)
- {
- grasswedge &w = grasswedges[i];
- w.bound1.offset = -camera1->o.dot(w.bound1);
- w.bound2.offset = -camera1->o.dot(w.bound2);
- }
-
- for(vtxarray *va = visibleva; va; va = va->next)
- {
- if(va->grasstris.empty() || va->occluded >= OCCLUDE_GEOM) continue;
- if(va->distance > grassdist) continue;
- if(reflecting || refracting>0 ? va->o.z+va->size<reflectz : va->o.z>=reflectz) continue;
- gengrassquads(va);
- }
-
- if(grassgroups.empty()) return;
-
- grassgroups.sort(comparegrassgroups);
-
- if(!grassvbo) glGenBuffers_(1, &grassvbo);
- gle::bindvbo(grassvbo);
- int size = grassverts.length()*sizeof(grassvert);
- grassvbosize = max(grassvbosize, size);
- glBufferData_(GL_ARRAY_BUFFER, grassvbosize, size == grassvbosize ? grassverts.getbuf() : NULL, GL_STREAM_DRAW);
- if(size != grassvbosize) glBufferSubData_(GL_ARRAY_BUFFER, 0, size, grassverts.getbuf());
- gle::clearvbo();
-}
-
-void rendergrass()
-{
- if(!grass || !grassdist || grassgroups.empty() || dbggrass) return;
-
- glDisable(GL_CULL_FACE);
- glEnable(GL_BLEND);
- glBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA);
- glDepthMask(GL_FALSE);
-
- GLOBALPARAM(camera, camera1->o);
-
- SETSHADER(grass);
-
- LOCALPARAMF(grassmargin, grassmargin, grassmargin ? grassmarginfade / grassmargin : 0.0f, grassmargin ? grassmarginfade : 1.0f);
-
- gle::bindvbo(grassvbo);
-
- const grassvert *ptr = 0;
- gle::vertexpointer(sizeof(grassvert), ptr->pos.v);
- gle::colorpointer(sizeof(grassvert), ptr->color.v);
- gle::texcoord0pointer(sizeof(grassvert), ptr->tc.v);
- gle::texcoord1pointer(sizeof(grassvert), ptr->lm.v, GL_SHORT);
- gle::tangentpointer(sizeof(grassvert), ptr->bounds.v, GL_BYTE);
- gle::enablevertex();
- gle::enablecolor();
- gle::enabletexcoord0();
- gle::enabletexcoord1();
- gle::enabletangent();
- gle::enablequads();
-
- int texid = -1, lmtexid = -1;
- loopv(grassgroups)
- {
- grassgroup &g = grassgroups[i];
-
- if(reflecting || refracting)
- {
- if(refracting < 0 ? g.tri->minz > reflectz : g.tri->maxz + grassheight < reflectz) continue;
- if(isfoggedsphere(g.tri->radius, g.tri->center)) continue;
- }
-
- if(texid != g.tex)
- {
- glBindTexture(GL_TEXTURE_2D, g.tex);
- texid = g.tex;
- }
- if(lmtexid != g.lmtex)
- {
- glActiveTexture_(GL_TEXTURE1);
- glBindTexture(GL_TEXTURE_2D, g.lmtex);
- glActiveTexture_(GL_TEXTURE0);
- lmtexid = g.lmtex;
- }
-
- gle::drawquads(g.offset, g.numquads);
- xtravertsva += 4*g.numquads;
- }
-
- gle::disablequads();
- gle::disablevertex();
- gle::disablecolor();
- gle::disabletexcoord0();
- gle::disabletexcoord1();
- gle::disabletangent();
-
- gle::clearvbo();
-
- glDisable(GL_BLEND);
- glDepthMask(GL_TRUE);
- glEnable(GL_CULL_FACE);
-}
-
-void cleanupgrass()
-{
- if(grassvbo) { glDeleteBuffers_(1, &grassvbo); grassvbo = 0; }
- grassvbosize = 0;
-}
-
generated by cgit v1.2.3 (git 2.46.0) at 2026-02-21 07:42:14 +0000