mirror of
https://git.code.sf.net/p/quake/quakeforge
synced 2024-11-14 08:50:58 +00:00
9d819254d4
Attempting to vis ad_tears drags a few lurking bugs out of SmallestEnclosingBall_vf: poor calculation of 2-point affine space, poor handling of duplicate points and dropped support points, poor calculation of the new center (related to duplicate points), and insufficient iterations for large point sets. qfvis (modified for cluster spheres) now loads ad_tears.
276 lines
7.9 KiB
C
276 lines
7.9 KiB
C
#ifdef HAVE_CONFIG_H
|
|
# include "config.h"
|
|
#endif
|
|
|
|
#include "QF/mathlib.h"
|
|
#include "QF/mersenne.h"
|
|
#include "QF/sys.h"
|
|
|
|
#define SIZEOF(x) (sizeof(x) / sizeof(x[0]))
|
|
|
|
const vec3_t points[] = {
|
|
{-1, -1, 1},
|
|
{ 1, 1, 1},
|
|
{-1, 1, -1},
|
|
{ 1, -1, -1},
|
|
{-1, -1, -1},
|
|
{ 1, 1, -1},
|
|
{-1, 1, 1},
|
|
{ 1, -1, 1},
|
|
{ 0, 0, 0},
|
|
};
|
|
|
|
// This particular triangle from ad_tears caused SEB to hit its iteration
|
|
// limit because the center in affine hull test failed due to excessivly tight
|
|
// epsilon. Yes, a rather insanely small triangle for a quake map. Probably
|
|
// due to qfbsp not culling the portal for being too small.
|
|
const vec3_t tears_triangle[] = {
|
|
{2201.82007, -1262, -713.450012},
|
|
{2201.8501, -1262, -713.593994},
|
|
{2201.84009, -1262, -713.445007},
|
|
};
|
|
const vec3_t tears_triangle2[] = {
|
|
{-519.989014, 1111.94995, -2592.05005},
|
|
{-520.002991, 1112, -2592.02002},
|
|
{-520.005005, 1112, -2592.04004},
|
|
};
|
|
const vec3_t tears_triangle3[] = {
|
|
{284, 624, 2959.76001},
|
|
{284, 624, 2960},
|
|
{284.234985, 624.471008, 2959.53003},
|
|
};
|
|
|
|
const vec3_t tears_quad[] = {
|
|
{1792, 1155.53003, 240},
|
|
{1792, 1030.32996, 240},
|
|
{1792.01001, 1030.32996, 240},
|
|
{1792.01001, 1155.53003, 240},
|
|
};
|
|
|
|
const vec3_t tears_quad2[] = {
|
|
{304, 3248, 3208},
|
|
{-61.2307014, 3248, 3208},
|
|
{-61.2307014, 3248, 3192},
|
|
{304, 3248, 3192},
|
|
};
|
|
|
|
const vec3_t tears_cluster[] = {
|
|
{551.638, -439.277008, 2804.63989},
|
|
{551, -438, 2806.02002},
|
|
{555.999023, -447.998993, 2805.1499},
|
|
{555.999023, -447.998993, 2804.32007},
|
|
{551.638, -439.277008, 2804.63989},
|
|
{555.999023, -447.998993, 2804.32007},
|
|
{555.999023, -447.998993, 2795.19995},
|
|
{550.97699, -437.954987, 2806.02002},
|
|
{551, -438, 2806.02002},
|
|
{555.999023, -447.998993, 2795.19995},
|
|
{555.999023, -447.998993, 2794.6499},
|
|
{550.978027, -437.954987, 2806.02002},
|
|
{545.945984, -442.945007, 2804.78003},
|
|
{546, -442.998993, 2804.77002},
|
|
{546, -443, 2804.69995},
|
|
{546, -443, 2804.78003},
|
|
{545.945007, -442.945007, 2804.78003},
|
|
{556, -448, 2794.6499},
|
|
{556, -448, 2805.1499},
|
|
{546, -443, 2804.78003},
|
|
{546, -443, 2804.69995},
|
|
{550.97699, -437.954987, 2806.02002},
|
|
{556, -448, 2794.6499},
|
|
{546.000977, -443, 2804.69995},
|
|
{545.945007, -442.945007, 2804.78003},
|
|
};
|
|
|
|
const vec3_t tears_cluster2[] = {
|
|
{-2160, -192, -704.242004},
|
|
{-2160, -192, -662},
|
|
{-2160, -196, -658},
|
|
{-2160, -220, -646},
|
|
{-2160, -222.332001, -645.416992},
|
|
{-2160, -320, -752},
|
|
{-2160, -192, -752},
|
|
{-2160, -192, -704.242004},
|
|
{-2160, -222.332001, -645.416992},
|
|
{-2160, -244, -640},
|
|
{-2160, -268, -640},
|
|
{-2160, -292, -646},
|
|
{-2160, -316, -658},
|
|
{-2160, -320, -662},
|
|
{-2160, -196, -814},
|
|
{-2160, -192, -810},
|
|
{-2160, -192, -752},
|
|
{-2160, -320, -752},
|
|
{-2160, -320, -810},
|
|
{-2160, -316, -814},
|
|
{-2160, -312, -816},
|
|
{-2160, -200, -816},
|
|
{-2174, -334, -676},
|
|
{-2186, -346, -700},
|
|
{-2192, -352, -724},
|
|
{-2192, -352, -748},
|
|
{-2186, -346, -772},
|
|
{-2174, -334, -796},
|
|
{-2160, -319.998993, -810},
|
|
{-2160, -319.998993, -661.999023},
|
|
{-2174, -178, -796},
|
|
{-2186, -166, -772},
|
|
{-2192, -160, -748},
|
|
{-2192, -160, -724},
|
|
{-2186, -166, -700},
|
|
{-2174, -178, -676},
|
|
{-2160, -192, -662},
|
|
{-2160, -192, -810},
|
|
{-2224, -320, -810},
|
|
{-2224, -330, -800},
|
|
{-2224, -320, -800},
|
|
{-2224, -200, -816},
|
|
{-2224, -312, -816},
|
|
{-2224, -316, -814},
|
|
{-2224, -320, -810},
|
|
{-2224, -320, -800},
|
|
{-2224, -192, -800},
|
|
{-2224, -192, -810},
|
|
{-2224, -196, -814},
|
|
{-2224, -192, -800},
|
|
{-2224, -182, -800},
|
|
{-2224, -192, -810},
|
|
{-2224, -330, -800},
|
|
{-2224, -334, -796},
|
|
{-2224, -178, -796},
|
|
{-2224, -182, -800},
|
|
{-2224, -334, -796},
|
|
{-2224, -346, -772},
|
|
{-2224, -351, -752},
|
|
{-2224, -161, -752},
|
|
{-2224, -166, -772},
|
|
{-2224, -178, -796},
|
|
{-2224, -351, -752},
|
|
{-2224, -352, -748},
|
|
{-2224, -352, -724},
|
|
{-2224, -351, -720},
|
|
{-2224, -161, -720},
|
|
{-2224, -160, -724},
|
|
{-2224, -160, -748},
|
|
{-2224, -161, -752},
|
|
{-2224, -351, -720},
|
|
{-2224, -346, -700},
|
|
{-2224, -334, -676},
|
|
{-2224, -316, -658},
|
|
{-2224, -292, -646},
|
|
{-2224, -268, -640},
|
|
{-2224, -244, -640},
|
|
{-2224, -220, -646},
|
|
{-2224, -196, -658},
|
|
{-2224, -178, -676},
|
|
{-2224, -166, -700},
|
|
{-2224, -161, -720},
|
|
};
|
|
|
|
// random numbers dug this up. needed more than 6 iterations
|
|
const vec3_t cloud_points[] = {
|
|
{1.70695281, 2.60889673, 2.86233163},
|
|
{2.11825109, 2.59883952, 1.48193693},
|
|
{2.76728868, 1.57646465, 2.39769602},
|
|
{1.88795376, 2.73980999, 1.58031297},
|
|
{2.79736757, 1.89582968, 1.80514407},
|
|
};
|
|
|
|
struct {
|
|
const vec3_t *points;
|
|
int num_points;
|
|
sphere_t expect;
|
|
} tests[] = {
|
|
{0, 0, {{ 0, 0, 0}, 0}},
|
|
{points, 1, {{-1, -1, 1}, 0}},
|
|
{points, 2, {{ 0, 0, 1}, 1.41421356}},
|
|
{points, 3, {{-0.333333343, 0.333333343, 0.333333343}, 1.63299322}},
|
|
{points, 4, {{0, 0, 0}, 1.73205081}},
|
|
{tears_triangle, SIZEOF (tears_triangle),
|
|
{{2201.84521, -1262, -713.519531}, 0.0747000724}},//FIXME numbers?
|
|
{tears_cluster, SIZEOF (tears_cluster),
|
|
{{552.678101, -443.460876, 2800.40405}, 8.04672813}},//FIXME numbers?
|
|
{tears_quad, SIZEOF (tears_quad),
|
|
{{1792.005, 1092.92999, 240}, 62.6000302}},
|
|
{tears_triangle2, SIZEOF (tears_triangle2),
|
|
{{-519.995972, 1111.97498, -2592.03516}, 0.0300767105}},//FIXME numbers?
|
|
{tears_quad2, SIZEOF (tears_quad2),
|
|
{{121.384659, 3248, 3200}, 182.790497}},
|
|
{tears_triangle3, SIZEOF (tears_triangle3),
|
|
{{284.117493, 624.235535, 2959.76489}, 0.352925777}},
|
|
{tears_cluster2, SIZEOF (tears_cluster2),
|
|
{{-2192, -256.000031, -736}, 103.479492}},//FIXME numbers?
|
|
{cloud_points, SIZEOF (cloud_points),
|
|
{{2.20056152, 2.23369908, 2.2332375}, 0.88327992}},
|
|
};
|
|
#define num_tests SIZEOF (tests)
|
|
|
|
static inline float
|
|
rnd (mtstate_t *mt)
|
|
{
|
|
union {
|
|
uint32_t u;
|
|
float f;
|
|
} uf;
|
|
|
|
do {
|
|
uf.u = mtwist_rand (mt) & 0x007fffff;
|
|
} while (!uf.u);
|
|
uf.u |= 0x40000000;
|
|
return uf.f - 1.0;
|
|
}
|
|
|
|
int
|
|
main (int argc, const char **argv)
|
|
{
|
|
int res = 0;
|
|
size_t i, j;
|
|
sphere_t sphere;
|
|
mtstate_t mt;
|
|
double start, end;
|
|
|
|
for (i = 0; i < num_tests; i ++) {
|
|
sphere = SmallestEnclosingBall (tests[i].points, tests[i].num_points);
|
|
if (VectorDistance_fast (sphere.center, tests[i].expect.center) > 1e-4
|
|
|| fabs (sphere.radius - tests[i].expect.radius) > 1e-4) {
|
|
res = 1;
|
|
printf ("test %d failed\n", (int) i);
|
|
printf ("expect: {%.9g, %.9g, %.9g},%.9g\n",
|
|
VectorExpand (tests[i].expect.center),
|
|
tests[i].expect.radius);
|
|
printf ("got : {%.9g, %.9g, %.9g},%.9g\n",
|
|
VectorExpand (sphere.center),
|
|
sphere.radius);
|
|
}
|
|
}
|
|
|
|
mtwist_seed (&mt, 0);
|
|
start = Sys_DoubleTime ();
|
|
for (i = 0; !res && i < 1000000; i++) {
|
|
vec3_t cloud[10];
|
|
sphere_t seb;
|
|
vec_t r2;
|
|
|
|
for (j = 0; j < 5; j++) {
|
|
VectorSet (rnd (&mt), rnd (&mt), rnd (&mt), cloud[j]);
|
|
}
|
|
seb = SmallestEnclosingBall ((const vec_t (*)[3]) cloud, 5);
|
|
r2 = seb.radius * seb.radius;
|
|
for (j = 0; j < 5; j++) {
|
|
if (VectorDistance_fast (cloud[j], seb.center) - r2
|
|
> 1e-5 * r2) {
|
|
res = 1;
|
|
printf ("%d %.9g - %.9g = %.9g\n", (int)j,
|
|
VectorDistance_fast (cloud[j], seb.center), r2,
|
|
VectorDistance_fast (cloud[j], seb.center) - r2);
|
|
printf ("[%.9g %.9g %.9g] - [%.9g %.9g %.9g] = %.9g > %.9g\n",
|
|
VectorExpand (cloud[j]), VectorExpand (seb.center),
|
|
VectorDistance_fast (cloud[j], seb.center), r2);
|
|
}
|
|
}
|
|
}
|
|
end = Sys_DoubleTime ();
|
|
printf ("%d iterations in %gs: %g iters/second\n", (int) i, end - start,
|
|
i / (end - start));
|
|
return res;
|
|
}
|