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cpp11
pymol-open-source/layer0/Sphere.cpp
Thomas Holder bc3a221b26 fix spheroid GL rendering
2019-08-30 10:23:37 +02:00

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/*
A* -------------------------------------------------------------------
B* This file contains source code for the PyMOL computer program
C* Copyright (c) Schrodinger, LLC.
D* -------------------------------------------------------------------
E* It is unlawful to modify or remove this copyright notice.
F* -------------------------------------------------------------------
G* Please see the accompanying LICENSE file for further information.
H* -------------------------------------------------------------------
I* Additional authors of this source file include:
-*
-*
-*
Z* -------------------------------------------------------------------
*/
#include"os_predef.h"
#include"os_std.h"
#include"os_gl.h"
#include"Base.h"
#include"Sphere.h"
#include"Vector.h"
#include"Err.h"
#include"MemoryDebug.h"
#define FAST_SPHERE_INIT
#ifndef FAST_SPHERE_INIT
/* Twelve vertices of icosahedron on unit sphere */
#define tau 0.8506508084F /* t=(1+sqrt(5))/2, tau=t/sqrt(1+t^2) */
#define one 0.5257311121F /* one=1/sqrt(1+t^2) , unit sphere */
static const float start_points[13][3] = {
{tau, one, 0},
{-tau, one, 0},
{-tau, -one, 0},
{tau, -one, 0},
{one, 0, tau},
{one, 0, -tau},
{-one, 0, -tau},
{-one, 0, tau},
{0, tau, one},
{0, -tau, one},
{0, -tau, -one},
{0, tau, -one}
};
static const int icosahedron[21][3] = {
{4, 8, 7},
{4, 7, 9},
{5, 6, 11},
{5, 10, 6},
{0, 4, 3},
{0, 3, 5},
{2, 7, 1},
{2, 1, 6},
{8, 0, 11},
{8, 11, 1},
{9, 10, 3},
{9, 2, 10},
{8, 4, 0},
{11, 0, 5},
{4, 9, 3},
{5, 3, 10},
{7, 8, 1},
{6, 1, 11},
{7, 2, 9},
{6, 10, 2}
};
#endif
static const int mesh[30][2] = {
{0, 3},
{0, 4},
{0, 5},
{0, 8},
{0, 11},
{1, 2},
{1, 6},
{1, 7},
{1, 8},
{1, 11},
{2, 6},
{2, 7},
{2, 9},
{2, 10},
{3, 4},
{3, 5},
{3, 9},
{3, 10},
{4, 7},
{4, 8},
{4, 9},
{5, 6},
{5, 10},
{5, 11},
{6, 10},
{6, 11},
{7, 8},
{7, 9},
{8, 11},
{9, 10}
};
#ifdef FAST_SPHERE_INIT
#include"SphereData.h"
#else
static SphereRec *MakeDotSphere(PyMOLGlobals * G, int level);
#endif
#ifndef FAST_SPHERE_INIT
static void SphereDumpAll(CSphere *I)
{
FILE *f;
int i, dot_total, a, c, strip_total, seq_total, tri_total;
SphereRec *sp;
f = fopen("SphereData.h", "w");
fprintf(f, "static int Sphere_NSpheres = %d;\n", NUMBER_OF_SPHERE_LEVELS);
fprintf(f, "static int Sphere_NTri[%d] = {\n", NUMBER_OF_SPHERE_LEVELS);
for (i=0; i < NUMBER_OF_SPHERE_LEVELS; i++){
fprintf(f, " %d, ", I->Sphere[i]->NTri);
}
fprintf(f, "\n};\n");
fprintf(f, "static int Sphere_NStrip[%d] = {\n", NUMBER_OF_SPHERE_LEVELS);
for (i=0; i < NUMBER_OF_SPHERE_LEVELS; i++){
fprintf(f, " %d, ", I->Sphere[i]->NStrip);
}
fprintf(f, "\n};\n");
fprintf(f, "static int Sphere_NVertTot[%d] = {\n", NUMBER_OF_SPHERE_LEVELS);
for (i=0; i < NUMBER_OF_SPHERE_LEVELS; i++){
fprintf(f, " %d, ", I->Sphere[i]->NVertTot);
}
fprintf(f, "\n};\n");
fprintf(f, "static int Sphere_nDot[%d] = {\n", NUMBER_OF_SPHERE_LEVELS);
for (i=0; i < NUMBER_OF_SPHERE_LEVELS; i++){
fprintf(f, " %d, ", I->Sphere[i]->nDot);
}
fprintf(f, "\n};\n");
fprintf(f, "static int Sphere_dot_start[%d] = {\n", NUMBER_OF_SPHERE_LEVELS);
dot_total = 0;
for (i=0; i < NUMBER_OF_SPHERE_LEVELS; i++){
fprintf(f, " %d, ", dot_total);
dot_total += I->Sphere[i]->nDot;
}
fprintf(f, "\n};\n");
fprintf(f, "static float Sphere_dot[][3] = {\n");
for (i=0; i < NUMBER_OF_SPHERE_LEVELS; i++){
sp = I->Sphere[i];
fprintf(f, "/* dots for Sphere #%d */\n", i);
for(a = 0; a < sp->nDot; a++) {
fprintf(f, "{ %15.12fF, %15.12fF, %15.12fF },\n",
sp->dot[a][0], sp->dot[a][1], sp->dot[a][2]);
}
}
fprintf(f, "};\n");
fprintf(f, "static float Sphere_area[] = {\n");
for (i=0; i < NUMBER_OF_SPHERE_LEVELS; i++){
sp = I->Sphere[i];
fprintf(f, "/* areas for Sphere #%d */\n", i);
c = 0;
for(a = 0; a < sp->nDot; a++) {
fprintf(f, "%15.12fF,", sp->area[a]);
c = (c + 1) % 4;
if (!c)
fprintf(f, "\n");
}
if (c)
fprintf(f, "\n");
}
fprintf(f, "};\n");
fprintf(f, "static int Sphere_StripLen_start[%d] = {\n", NUMBER_OF_SPHERE_LEVELS);
strip_total = 0;
for (i=0; i < NUMBER_OF_SPHERE_LEVELS; i++){
fprintf(f, " %d, ", strip_total);
strip_total += I->Sphere[i]->NStrip;
}
fprintf(f, "\n};\n");
fprintf(f, "static int Sphere_StripLen[] = {\n");
for (i=0; i < NUMBER_OF_SPHERE_LEVELS; i++){
sp = I->Sphere[i];
fprintf(f, "/* StripLen for Sphere #%d */\n", i);
c = 0;
for(a = 0; a < sp->NStrip; a++) {
fprintf(f, "%6d,", sp->StripLen[a]);
c = (c + 1) % 10;
if(!c)
fprintf(f, "\n");
}
if (c)
fprintf(f, "\n");
}
fprintf(f, "};\n");
fprintf(f, "static int Sphere_Sequence_start[%d] = {\n", NUMBER_OF_SPHERE_LEVELS);
seq_total = 0;
for (i=0; i < NUMBER_OF_SPHERE_LEVELS; i++){
fprintf(f, " %d, ", seq_total);
seq_total += I->Sphere[i]->NVertTot;
}
fprintf(f, "\n};\n");
fprintf(f, "static int Sphere_Sequence[] = {\n");
for (i=0; i < NUMBER_OF_SPHERE_LEVELS; i++){
sp = I->Sphere[i];
fprintf(f, "/* Sequence for Sphere #%d */\n", i);
c = 0;
for(a = 0; a < sp->NVertTot; a++) {
fprintf(f, "%6d,", sp->Sequence[a]);
c = (c + 1) % 10;
if(!c)
fprintf(f, "\n");
}
if (c)
fprintf(f, "\n");
}
fprintf(f, "};\n");
fprintf(f, "static int Sphere_Tri_start[%d] = {\n", NUMBER_OF_SPHERE_LEVELS);
tri_total = 0;
for (i=0; i < NUMBER_OF_SPHERE_LEVELS; i++){
fprintf(f, " %d, ", tri_total);
tri_total += 3 * I->Sphere[i]->NTri;
}
fprintf(f, "\n};\n");
fprintf(f, "static int Sphere_Tri[] = {\n");
for (i=0; i < NUMBER_OF_SPHERE_LEVELS; i++){
sp = I->Sphere[i];
fprintf(f, "/* Tri for Sphere #%d */\n", i);
c = 0;
for(a = 0; a < 3* sp->NTri; a++) {
fprintf(f, "%6d,", sp->Tri[a]);
c = (c + 1) % 10;
if(!c)
fprintf(f, "\n");
}
if (c)
fprintf(f, "\n");
}
fprintf(f, "};\n");
fclose(f);
}
#endif
void SphereInit(PyMOLGlobals * G)
{
CSphere *I = (G->Sphere = pymol::calloc<CSphere>(1));
#ifdef FAST_SPHERE_INIT
I->Array = pymol::malloc<SphereRec>(Sphere_NSpheres);
{
int i;
for (i=0; i<Sphere_NSpheres; i++){
I->Array[i].area = &Sphere_area[Sphere_dot_start[i]];
I->Array[i].dot = &Sphere_dot[Sphere_dot_start[i]];
I->Array[i].StripLen = &Sphere_StripLen[Sphere_StripLen_start[i]];
I->Array[i].Sequence = &Sphere_Sequence[Sphere_Sequence_start[i]];
I->Array[i].NStrip = Sphere_NStrip[i];
I->Array[i].NVertTot = Sphere_NVertTot[i];
I->Array[i].nDot = Sphere_nDot[i];
I->Array[i].Tri = &Sphere_Tri[Sphere_Tri_start[i]];
I->Array[i].NTri = Sphere_NTri[i];
if (i){
I->Array[i].Mesh = NULL;
I->Array[i].NMesh = 0;
} else {
I->Array[i].Mesh = (int *) (void *) mesh;
I->Array[i].NMesh = 30;
}
I->Sphere[i] = &I->Array[i];
}
}
#else
{
int i;
for (i=0; i<NUMBER_OF_SPHERE_LEVELS; i++){
I->Sphere[i] = MakeDotSphere(G, i);
}
SphereDumpAll(I);
}
#endif
}
#ifndef FAST_SPHERE_INIT
static void SpherePurge(SphereRec * I)
{
/* NOTE: S->Mesh is not currently a pointer */
mfree(I->dot);
mfree(I->area);
mfree(I->StripLen);
mfree(I->Sequence);
mfree(I->Tri);
FreeP(I);
}
#endif
void SphereFree(PyMOLGlobals * G)
{
CSphere *I = G->Sphere;
#ifndef FAST_SPHERE_INIT
SpherePurge(I->Sphere[0]);
SpherePurge(I->Sphere[1]);
SpherePurge(I->Sphere[2]);
SpherePurge(I->Sphere[3]);
SpherePurge(I->Sphere[4]);
#else
FreeP(I->Array);
#endif
FreeP(I);
}
/* private stuff */
#ifndef FAST_SPHERE_INIT
// MAXDOT : 12, 42, 162, 642, 2562 ... :: 12 + (30 + 120 + 480 + 1920 + ... ) :: 12 + ( 30 + (30*4) + (30*4*4) + (30*4*4*4) + ... )
// MAXTRI : 80, 320, 1280, 5120, ... :: 20*1 + 20*4 + 20*4*4 + 20*4*4*4 + 20*4*4*4*4 ::
//For NUMBER_OF_SPHERE_LEVELS=6
//#define MAXDOT 12900 // 12800
//#define MAXTRI 20500 // 20480
//For NUMBER_OF_SPHERE_LEVELS=5
#define MAXDOT 2600 // 2562
#define MAXTRI 5200 // 5120
typedef int EdgeCol[MAXDOT]; /* should move these into dynamic storage to save 3MB mem */
typedef EdgeCol EdgeArray[MAXDOT];
typedef int Triangle[3];
typedef struct {
float *Dot;
EdgeArray *EdgeRef;
Triangle *Tri;
int NDot, NTri;
} SphereBuilderRec;
static void MakeVertex(SphereBuilderRec * S, int d1, int d2)
{
if((*S->EdgeRef)[d1][d2] < 0) {
average3f(S->Dot + (3 * d1), S->Dot + (3 * d2), S->Dot + (3 * S->NDot));
(*S->EdgeRef)[d1][d2] = S->NDot;
(*S->EdgeRef)[d2][d1] = S->NDot;
normalize3f(S->Dot + (3 * S->NDot));
S->NDot++;
}
}
static float SphericalAngle(SphereBuilderRec * S, int d0, int d1, int d2)
{
Vector3f v1, v2, s1, s2;
/* map vector onto surface of sphere and measure angle */
subtract3f(S->Dot + (3 * d1), S->Dot + (3 * d0), v1);
subtract3f(S->Dot + (3 * d2), S->Dot + (3 * d0), v2);
remove_component3f(v1, S->Dot + (3 * d0), s1);
remove_component3f(v2, S->Dot + (3 * d0), s2);
return (get_angle3f(s1, s2));
}
static SphereRec *MakeDotSphere(PyMOLGlobals * G, int level)
{
SphereRec *result;
int *TriFlag;
int a, b, c, h, k, l, curTri, n, it;
float area, sumArea = 0.0;
int nStrip, *q, *s;
int nVertTot;
int flag;
float vt1[3], vt2[3], vt[3];
SphereBuilderRec SBuild, *S;
S = &SBuild;
S->Dot = pymol::malloc<float>(3 * MAXDOT);
ErrChkPtr(G, S->Dot);
S->EdgeRef = pymol::malloc<EdgeArray>(1);
ErrChkPtr(G, S->EdgeRef);
S->Tri = pymol::malloc<Triangle>(MAXTRI);
ErrChkPtr(G, S->Tri);
TriFlag = pymol::malloc<int>(MAXTRI);
ErrChkPtr(G, TriFlag);
S->NDot = 12;
for(a = 0; a < S->NDot; a++) {
for(c = 0; c < 3; c++)
S->Dot[3 * a + c] = start_points[a][c];
normalize3f(S->Dot + (3 * a));
}
S->NTri = 20;
for(a = 0; a < S->NTri; a++)
for(c = 0; c < 3; c++)
S->Tri[a][c] = icosahedron[a][c];
for(a = 0; a < MAXDOT; a++)
for(b = 0; b < MAXDOT; b++)
(*S->EdgeRef)[a][b] = -1;
if(level > (NUMBER_OF_SPHERE_LEVELS-1))
level = (NUMBER_OF_SPHERE_LEVELS-1);
for(c = 0; c < level; c++) {
/* create new vertices */
for(a = 0; a < S->NTri; a++) {
MakeVertex(S, S->Tri[a][0], S->Tri[a][1]);
MakeVertex(S, S->Tri[a][1], S->Tri[a][2]);
MakeVertex(S, S->Tri[a][0], S->Tri[a][2]);
}
/* create new triangles */
curTri = S->NTri;
for(a = 0; a < curTri; a++) {
h = S->Tri[a][0];
k = S->Tri[a][1];
l = S->Tri[a][2];
S->Tri[a][0] = h;
S->Tri[a][1] = (*S->EdgeRef)[h][k];
S->Tri[a][2] = (*S->EdgeRef)[h][l];
S->Tri[S->NTri][0] = k;
S->Tri[S->NTri][1] = (*S->EdgeRef)[k][h];
S->Tri[S->NTri][2] = (*S->EdgeRef)[k][l];
S->NTri++;
S->Tri[S->NTri][0] = l;
S->Tri[S->NTri][1] = (*S->EdgeRef)[l][h];
S->Tri[S->NTri][2] = (*S->EdgeRef)[l][k];
S->NTri++;
S->Tri[S->NTri][0] = (*S->EdgeRef)[h][k];
S->Tri[S->NTri][1] = (*S->EdgeRef)[k][l];
S->Tri[S->NTri][2] = (*S->EdgeRef)[l][h];
S->NTri++;
}
// printf( "MakeDotSphere: Level: %i S->NTri: %i\n",c, S->NTri);
}
// printf(" MakeDotSphere: NDot %i S->NTri %i\n",S->NDot,S->NTri);
result = pymol::malloc<SphereRec>(1);
ErrChkPtr(G, result);
result->dot = pymol::malloc<Vector3f>(S->NDot);
ErrChkPtr(G, result->dot);
result->area = pymol::malloc<float>(S->NDot);
ErrChkPtr(G, result->area);
result->StripLen = pymol::malloc<int>(S->NTri * 3);
ErrChkPtr(G, result->StripLen);
result->Sequence = pymol::malloc<int>(S->NTri * 3);
ErrChkPtr(G, result->Sequence);
for(a = 0; a < S->NDot; a++) {
for(c = 0; c < 3; c++)
result->dot[a][c] = *(S->Dot + (3 * a + c));
result->area[a] = 0.0;
}
/* fix normals so that v1-v0 x v2-v0 is the correct normal */
for(a = 0; a < S->NTri; a++) {
subtract3f(result->dot[S->Tri[a][1]], result->dot[S->Tri[a][0]], vt1);
subtract3f(result->dot[S->Tri[a][2]], result->dot[S->Tri[a][0]], vt2);
cross_product3f(vt1, vt2, vt);
if(dot_product3f(vt, result->dot[S->Tri[a][0]]) < 0.0) { /* if wrong, then interchange */
it = S->Tri[a][2];
S->Tri[a][2] = S->Tri[a][1];
S->Tri[a][1] = it;
}
}
for(a = 0; a < S->NTri; a++) {
area = (float) (SphericalAngle(S, S->Tri[a][0], S->Tri[a][1], S->Tri[a][2]) +
SphericalAngle(S, S->Tri[a][1], S->Tri[a][0], S->Tri[a][2]) +
SphericalAngle(S, S->Tri[a][2], S->Tri[a][0], S->Tri[a][1]) - cPI);
/* multiply by r^2 to get area */
sumArea += area;
area /= 3.0;
result->area[S->Tri[a][0]] += area;
result->area[S->Tri[a][1]] += area;
result->area[S->Tri[a][2]] += area;
}
if(fabs(sumArea - (4 * cPI)) > 0.001) {
printf(" MakeDotSphere: sumArea: %8.6f which is %8.6f Pi\n", sumArea, sumArea / cPI);
ErrFatal(G, "MakeDotSphere", "Area of sphere does not sum to 4*pi!\n");
}
for(a = 0; a < S->NTri; a++)
TriFlag[a] = false;
nStrip = 0;
nVertTot = 0;
s = result->StripLen;
q = result->Sequence;
/* tesselate the sphere in a semi-efficient fashion...this could definitely be improved */
flag = true;
while(flag) {
flag = false;
a = 0;
while(a < S->NTri) {
if(!TriFlag[a]) {
flag = true;
TriFlag[a] = true;
*(q++) = S->Tri[a][0];
*(q++) = S->Tri[a][1];
*(q++) = S->Tri[a][2];
n = 3;
b = 0;
while(b < S->NTri) {
if(!TriFlag[b]) {
if(((S->Tri[b][0] == q[-2]) && (S->Tri[b][1] == q[-1])) ||
((S->Tri[b][0] == q[-1]) && (S->Tri[b][1] == q[-2]))) {
*(q++) = S->Tri[b][2];
TriFlag[b] = true;
b = 0;
n++;
} else if(((S->Tri[b][0] == q[-2]) && (S->Tri[b][2] == q[-1])) ||
((S->Tri[b][0] == q[-1]) && (S->Tri[b][2] == q[-2]))) {
*(q++) = S->Tri[b][1];
TriFlag[b] = true;
b = 0;
n++;
} else if(((S->Tri[b][2] == q[-2]) && (S->Tri[b][1] == q[-1])) ||
((S->Tri[b][2] == q[-1]) && (S->Tri[b][1] == q[-2]))) {
*(q++) = S->Tri[b][0];
TriFlag[b] = true;
b = 0;
n++;
}
}
b++;
}
if(n == 3) {
q[-3] = S->Tri[a][1];
q[-2] = S->Tri[a][2];
q[-1] = S->Tri[a][0];
b = 0;
while(b < S->NTri) {
if(!TriFlag[b]) {
if(((S->Tri[b][0] == q[-2]) && (S->Tri[b][1] == q[-1])) ||
((S->Tri[b][0] == q[-1]) && (S->Tri[b][1] == q[-2]))) {
*(q++) = S->Tri[b][2];
TriFlag[b] = true;
b = 0;
n++;
} else if(((S->Tri[b][0] == q[-2]) && (S->Tri[b][2] == q[-1])) ||
((S->Tri[b][0] == q[-1]) && (S->Tri[b][2] == q[-2]))) {
*(q++) = S->Tri[b][1];
TriFlag[b] = true;
b = 0;
n++;
} else if(((S->Tri[b][2] == q[-2]) && (S->Tri[b][1] == q[-1])) ||
((S->Tri[b][2] == q[-1]) && (S->Tri[b][1] == q[-2]))) {
*(q++) = S->Tri[b][0];
TriFlag[b] = true;
b = 0;
n++;
}
}
b++;
}
}
if(n == 3) {
q[-3] = S->Tri[a][2];
q[-2] = S->Tri[a][0];
q[-1] = S->Tri[a][1];
b = 0;
while(b < S->NTri) {
if(!TriFlag[b]) {
if(((S->Tri[b][0] == q[-2]) && (S->Tri[b][1] == q[-1])) ||
((S->Tri[b][0] == q[-1]) && (S->Tri[b][1] == q[-2]))) {
*(q++) = S->Tri[b][2];
TriFlag[b] = true;
b = 0;
n++;
} else if(((S->Tri[b][0] == q[-2]) && (S->Tri[b][2] == q[-1])) ||
((S->Tri[b][0] == q[-1]) && (S->Tri[b][2] == q[-2]))) {
*(q++) = S->Tri[b][1];
TriFlag[b] = true;
b = 0;
n++;
} else if(((S->Tri[b][2] == q[-2]) && (S->Tri[b][1] == q[-1])) ||
((S->Tri[b][2] == q[-1]) && (S->Tri[b][1] == q[-2]))) {
*(q++) = S->Tri[b][0];
TriFlag[b] = true;
b = 0;
n++;
}
}
b++;
}
}
*(s++) = n;
nVertTot += n;
nStrip++;
}
a++;
}
}
mfree(S->Dot);
mfree(S->EdgeRef);
mfree(TriFlag);
result->Tri = (int *) S->Tri;
result->Tri = pymol::realloc(result->Tri, S->NTri * 3);
result->NTri = S->NTri;
result->StripLen = pymol::realloc(result->StripLen, nStrip);
result->Sequence = pymol::realloc(result->Sequence, nVertTot);
result->dot = pymol::realloc(result->dot, S->NDot);
result->area = pymol::realloc(result->area, S->NDot);
result->nDot = S->NDot;
result->NStrip = nStrip;
result->NVertTot = nVertTot;
result->Mesh = NULL;
result->NMesh = 0;
if(!level) { /* provide mesh for S->Sphere[0] only...rest, to do. */
result->Mesh = (int *) mesh;
result->NMesh = 30;
}
/*
q=result->Sequence;
for(a=0;a<result->NStrip;a++)
{
printf("%d:",result->StripLen[a]);
for(b=0;b<result->StripLen[a];b++)
{
printf("%d ",*(q++));
}
printf("\n");
}
*/
return (result);
}
#endif
void SphereRender(PyMOLGlobals * G, int level, const float *centroid, const float *color, float alpha, float radius){
#ifndef PURE_OPENGL_ES_2
SphereRec *sp = G->Sphere->Sphere[level];
int a, cc;
int *q = sp->Sequence;
float pt[3];
if (color)
glColor4f(color[0], color[1], color[2], alpha);
for(a = 0; a < sp->NStrip; a++) {
glBegin(GL_TRIANGLE_STRIP);
cc = sp->StripLen[a];
while(cc--) {
glNormal3fv(sp->dot[*q]);
mult3f(sp->dot[*q], radius, pt);
add3f(centroid, pt, pt);
glVertex3fv(pt);
q++;
}
glEnd();
}
#endif
}
SphereRec* GetSpheroidSphereRec(PyMOLGlobals* G)
{
return G->Sphere->Sphere[2];
}
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