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faster drawing of convex shapes online

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This commit is contained in:
Zeno Rogue 2018-06-07 14:29:22 +02:00
parent ef83f1ef23
commit d40680358c
1 changed files with 101 additions and 44 deletions
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69
polygons.cpp
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@ -31,6 +31,11 @@ static const int POLY_HASSHADOW = 1024;
// Goldberg shapes
static const int POLY_GP = 2048;
// Convex shape (vertex)
static const int POLY_VCONVEX = 4096;
// Convex shape (central)
static const int POLY_CCONVEX = 8192;
vector<hyperpoint> hpc;
int prehpc;
@ -272,6 +277,14 @@ void setmatrix(int useV, const transmatrix& V) {
glhr::id_modelview();
}
#ifndef MINIMIZE_GL_CALLS
#ifdef EMSCRIPTEN
#define MINIMIZE_GL_CALLS 1
#else
#define MINIMIZE_GL_CALLS 0
#endif
#endif
void gldraw(int useV, const transmatrix& V, const vector<glvertex>& v, int ps, int pq, int col, int outline, int flags, textureinfo *tinf) {
if(tinf) {
@ -303,12 +316,17 @@ void gldraw(int useV, const transmatrix& V, const vector<glvertex>& v, int ps, i
setmatrix(useV, V);
if(draw) {
#ifdef DIRTY
#warning dirty
if((flags & POLY_VCONVEX) && MINIMIZE_GL_CALLS) {
glhr::vertices(v);
glhr::color2(col);
glDrawArrays(tinf ? GL_TRIANGLES : GL_TRIANGLE_FAN, ps, pq);
#else
}
else if((flags & POLY_CCONVEX) && MINIMIZE_GL_CALLS) {
glhr::vertices(v);
glhr::color2(col);
glDrawArrays(tinf ? GL_TRIANGLES : GL_TRIANGLE_FAN, ps-1, pq+1);
}
else {
glEnable(GL_STENCIL_TEST);
glColorMask( GL_FALSE,GL_FALSE,GL_FALSE,GL_FALSE );
@ -346,7 +364,7 @@ void gldraw(int useV, const transmatrix& V, const vector<glvertex>& v, int ps, i
}
glDisable(GL_STENCIL_TEST);
#endif
}
}
if(outline) {
@ -603,7 +621,7 @@ void drawpolyline(polytodraw& p) {
#if CAP_GL
if(vid.usingGL && pmodel == mdDisk && !spherespecial) {
glLineWidth(linewidthat(tC0(pp.V), pp.minwidth));
gldraw(1, pp.V, *pp.tab, pp.offset, pp.cnt, p.col, pp.outline, 0, pp.tinf);
gldraw(1, pp.V, *pp.tab, pp.offset, pp.cnt, p.col, pp.outline, pp.flags &~ POLY_INVERSE, pp.tinf);
return;
}
#endif
@ -1205,6 +1223,8 @@ hyperpoint turtlevertex(int u, double x, double y, double z) {
return hpxd(scale, x, y, z);
}
vector<hpcshape*> allshapes;
void finishshape() {
last->e = size(hpc);
double area = 0;
@ -1212,6 +1232,28 @@ void finishshape() {
area += hpc[i][0] * hpc[i+1][1] - hpc[i+1][0] * hpc[i][1];
if(abs(area) < 1e-9) last->flags |= POLY_ISSIDE;
if(area >= 0) last->flags |= POLY_INVERSE;
bool allplus = true, allminus = true;
for(int i=last->s; i<last->e-1; i++) {
ld v = hpc[i][0] * hpc[i+1][1] - hpc[i+1][0] * hpc[i][1];
if(v > 1e-6) allplus = false;
if(v < -1e-6) allminus = false;
}
if(allminus || allplus) last->flags |= POLY_CCONVEX;
allplus = true, allminus = true;
ld cx = hpc[last->s][0], cy = hpc[last->s][1];
for(int i=last->s; i<last->e-1; i++) {
ld v = (hpc[i][0]-cx) * (hpc[i+1][1]-cy) - (hpc[i+1][0]-cx) * (hpc[i][1]-cy);
if(v > 1e-6) allplus = false;
if(v < -1e-6) allminus = false;
}
if(allminus || allplus) last->flags |= POLY_VCONVEX;
allshapes.push_back(last);
/* if(isnan(area)) ;
else if(intval(hpc[last->s], hpc[last->e-1]) > 1e-6)
printf("bad end\n"); */
@ -1219,6 +1261,7 @@ void finishshape() {
void bshape(hpcshape& sh, int p) {
if(last) finishshape();
hpc.push_back(hpxy(0,0));
last = &sh;
last->s = size(hpc), last->prio = p;
last->flags = 0;
@ -1360,6 +1403,7 @@ ld dlow_table[SIDEPARS], dhi_table[SIDEPARS];
void buildpolys() {
symmetriesAt.clear();
allshapes.clear();
geom3::compute();
gp::clear_plainshapes();
DEBB(DF_INIT, (debugfile,"buildpolys\n"));
@ -2186,8 +2230,21 @@ void buildpolys() {
static int qhpc0;
int qhpc = size(hpc);
if(qhpc != qhpc0 && debug_geometry)
if(qhpc != qhpc0 && debug_geometry) {
printf("qhpc = %d (%d+%d)\n", qhpc0 = qhpc, prehpc, qhpc-prehpc);
printf("shapes = %d\n", size(allshapes));
int inve=0, issi=0, vcon=0, ccon=0;
for(auto sh: allshapes) {
if(sh->flags & POLY_INVERSE) inve++;
if(sh->flags & POLY_ISSIDE) issi++;
if(sh->flags & POLY_VCONVEX) vcon++;
if(sh->flags & POLY_CCONVEX) ccon++;
}
printf("triangle flags = %x\n", shTriangle.flags);
printf("plain floor flags = %x\n", shFloor.b[0].flags);
printf("ball flags = %x\n", shDisk.flags);
printf("inverse = %d isside = %d vcon = %d ccon = %d\n", inve, issi, vcon, ccon);
}
initPolyForGL();
}