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image.cpp
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/* ----------------------------------------------------------------------
LAMMPS - Large-scale Atomic/Molecular Massively Parallel Simulator
http://lammps.sandia.gov, Sandia National Laboratories
Steve Plimpton, sjplimp@sandia.gov
Copyright (2003) Sandia Corporation. Under the terms of Contract
DE-AC04-94AL85000 with Sandia Corporation, the U.S. Government retains
certain rights in this software. This software is distributed under
the GNU General Public License.
See the README file in the top-level LAMMPS directory.
------------------------------------------------------------------------- */
/* ----------------------------------------------------------------------
Contributing author: Nathan Fabian (Sandia)
------------------------------------------------------------------------- */
#include "mpi.h"
#include "math.h"
#include "ctype.h"
#include "stdlib.h"
#include "string.h"
#include "image.h"
#include "math_extra.h"
#include "random_mars.h"
#include "math_const.h"
#include "error.h"
#include "force.h"
#include "memory.h"
#ifdef LAMMPS_JPEG
#include "jpeglib.h"
#endif
#ifdef LAMMPS_PNG
#include <png.h>
#include <zlib.h>
#include <setjmp.h>
#include "version.h"
#endif
using namespace LAMMPS_NS;
using namespace MathConst;
#define NCOLORS 140
#define NELEMENTS 109
#define EPSILON 1.0e-6
enum{NUMERIC,MINVALUE,MAXVALUE};
enum{CONTINUOUS,DISCRETE,SEQUENTIAL};
enum{ABSOLUTE,FRACTIONAL};
enum{NO,YES};
/* ---------------------------------------------------------------------- */
Image::Image(LAMMPS *lmp, int nmap_caller) : Pointers(lmp)
{
MPI_Comm_rank(world,&me);
MPI_Comm_size(world,&nprocs);
// defaults for 3d viz
width = height = 512;
theta = 60.0 * MY_PI/180.0;
phi = 30.0 * MY_PI/180.0;
zoom = 1.0;
persp = 0.0;
shiny = 1.0;
ssao = NO;
up[0] = 0.0;
up[1] = 0.0;
up[2] = 1.0;
// colors
ncolors = 0;
username = NULL;
userrgb = NULL;
boxcolor = color2rgb("yellow");
background[0] = background[1] = background[2] = 0;
// define nmap colormaps, all with default settings
nmap = nmap_caller;
maps = new ColorMap*[nmap];
for (int i = 0; i < nmap; i++)
maps[i] = new ColorMap(lmp,this);
// static parameters
FOV = MY_PI/6.0; // 30 degrees
ambientColor[0] = 0.0;
ambientColor[1] = 0.0;
ambientColor[2] = 0.0;
keyLightPhi = -MY_PI4; // -45 degrees
keyLightTheta = MY_PI/6.0; // 30 degrees
keyLightColor[0] = 0.9;
keyLightColor[1] = 0.9;
keyLightColor[2] = 0.9;
fillLightPhi = MY_PI/6.0; // 30 degrees
fillLightTheta = 0;
fillLightColor[0] = 0.45;
fillLightColor[1] = 0.45;
fillLightColor[2] = 0.45;
backLightPhi = MY_PI; // 180 degrees
backLightTheta = MY_PI/12.0; // 15 degrees
backLightColor[0] = 0.9;
backLightColor[1] = 0.9;
backLightColor[2] = 0.9;
random = NULL;
}
/* ---------------------------------------------------------------------- */
Image::~Image()
{
for (int i = 0; i < nmap; i++) delete maps[i];
delete [] maps;
for (int i = 0; i < ncolors; i++) delete [] username[i];
memory->sfree(username);
memory->destroy(userrgb);
memory->destroy(depthBuffer);
memory->destroy(surfaceBuffer);
memory->destroy(imageBuffer);
memory->destroy(depthcopy);
memory->destroy(surfacecopy);
memory->destroy(rgbcopy);
if (random) delete random;
}
/* ----------------------------------------------------------------------
allocate image and depth buffers
called after image size is set
------------------------------------------------------------------------- */
void Image::buffers()
{
npixels = width * height;
memory->create(depthBuffer,npixels,"image:depthBuffer");
memory->create(surfaceBuffer,2*npixels,"image:surfaceBuffer");
memory->create(imageBuffer,3*npixels,"image:imageBuffer");
memory->create(depthcopy,npixels,"image:depthcopy");
memory->create(surfacecopy,2*npixels,"image:surfacecopy");
memory->create(rgbcopy,3*npixels,"image:rgbcopy");
}
/* ----------------------------------------------------------------------
reset view parameters
called once if view is STATIC
called before every render if view is DYNAMIC
------------------------------------------------------------------------- */
void Image::view_params(double boxxlo, double boxxhi, double boxylo,
double boxyhi, double boxzlo, double boxzhi)
{
// camDir points at the camera, view direction = -camDir
camDir[0] = sin(theta)*cos(phi);
camDir[1] = sin(theta)*sin(phi);
camDir[2] = cos(theta);
// normalize up vector
if (up[0] == 0.0 && up[1] == 0.0 && up[2] == 0.0)
error->all(FLERR,"Invalid image up vector");
MathExtra::norm3(up);
// adjust camDir by epsilon if camDir and up are parallel
// do this by tweaking view direction, not up direction
// try to insure continuous images as changing view passes thru up
// sufficient to handle common cases where theta = 0 or 180 is degenerate?
double dot = MathExtra::dot3(up,camDir);
if (fabs(dot) > 1.0-EPSILON) {
if (theta == 0.0) {
camDir[0] = sin(EPSILON)*cos(phi);
camDir[1] = sin(EPSILON)*sin(phi);
camDir[2] = cos(EPSILON);
} else if (theta == MY_PI) {
camDir[0] = sin(theta-EPSILON)*cos(phi);
camDir[1] = sin(theta-EPSILON)*sin(phi);
camDir[2] = cos(theta-EPSILON);
} else {
camDir[0] = sin(theta+EPSILON)*cos(phi);
camDir[1] = sin(theta+EPSILON)*sin(phi);
camDir[2] = cos(theta+EPSILON);
}
}
// camUp = camDir x (Up x camDir)
MathExtra::cross3(up,camDir,camRight);
MathExtra::norm3(camRight);
MathExtra::cross3(camDir,camRight,camUp);
if (camUp[0] == 0.0 && camUp[1] == 0.0 && camUp[2] == 0.0)
error->all(FLERR,"Invalid image up vector");
MathExtra::norm3(camUp);
// zdist = camera distance = function of zoom & bounding box
// camPos = camera position = function of camDir and zdist
double delx = 2.0*(boxxhi-boxxlo);
double dely = 2.0*(boxyhi-boxylo);
double delz = 2.0*(boxzhi-boxzlo);
double maxdel = MAX(delx,dely);
maxdel = MAX(maxdel,delz);
zdist = maxdel;
zdist /= tan(FOV);
zdist += 0.5 * (delx*camDir[0] + dely*camDir[1] + delz*camDir[2]);
zdist /= zoom;
camPos[0] = camDir[0] * zdist;
camPos[1] = camDir[1] * zdist;
camPos[2] = camDir[2] * zdist;
// light directions in terms of -camDir = z
keyLightDir[0] = cos(keyLightTheta) * sin(keyLightPhi);
keyLightDir[1] = sin(keyLightTheta);
keyLightDir[2] = cos(keyLightTheta) * cos(keyLightPhi);
fillLightDir[0] = cos(fillLightTheta) * sin(fillLightPhi);
fillLightDir[1] = sin(fillLightTheta);
fillLightDir[2] = cos(fillLightTheta) * cos(fillLightPhi);
backLightDir[0] = cos(backLightTheta) * sin(backLightPhi);
backLightDir[1] = sin(backLightTheta);
backLightDir[2] = cos(backLightTheta) * cos(backLightPhi);
keyHalfDir[0] = 0 + keyLightDir[0];
keyHalfDir[1] = 0 + keyLightDir[1];
keyHalfDir[2] = 1 + keyLightDir[2];
MathExtra::norm3(keyHalfDir);
// adjust shinyness of the reflection
specularHardness = 16.0 * shiny;
specularIntensity = shiny;
// adjust strength of the SSAO
if (ssao) {
if (!random) random = new RanMars(lmp,seed+me);
SSAORadius = maxdel * 0.05 * ssaoint;
SSAOSamples = static_cast<int> (8.0 + 32.0*ssaoint);
SSAOJitter = MY_PI / 12;
ambientColor[0] = 0.5;
ambientColor[1] = 0.5;
ambientColor[2] = 0.5;
}
// param for rasterizing spheres
tanPerPixel = -(maxdel / (double) height);
}
/* ----------------------------------------------------------------------
initialize image to background color and depth buffer
no need to init surfaceBuffer, since will be based on depth
------------------------------------------------------------------------- */
void Image::clear()
{
int red = background[0];
int green = background[1];
int blue = background[2];
int ix,iy;
for (iy = 0; iy < height; iy ++)
for (ix = 0; ix < width; ix ++) {
imageBuffer[iy * width * 3 + ix * 3 + 0] = red;
imageBuffer[iy * width * 3 + ix * 3 + 1] = green;
imageBuffer[iy * width * 3 + ix * 3 + 2] = blue;
depthBuffer[iy * width + ix] = -1;
}
}
/* ----------------------------------------------------------------------
merge image from each processor into one composite image
done pixel by pixel, respecting depth buffer
hi procs send to lo procs, cascading down logarithmically
------------------------------------------------------------------------- */
void Image::merge()
{
MPI_Request requests[3];
int nhalf = 1;
while (nhalf < nprocs) nhalf *= 2;
nhalf /= 2;
while (nhalf) {
if (me < nhalf && me+nhalf < nprocs) {
MPI_Irecv(rgbcopy,npixels*3,MPI_BYTE,me+nhalf,0,world,&requests[0]);
MPI_Irecv(depthcopy,npixels,MPI_DOUBLE,me+nhalf,0,world,&requests[1]);
if (ssao)
MPI_Irecv(surfacecopy,npixels*2,MPI_DOUBLE,
me+nhalf,0,world,&requests[2]);
if (ssao) MPI_Waitall(3,requests,MPI_STATUS_IGNORE);
else MPI_Waitall(2,requests,MPI_STATUS_IGNORE);
for (int i = 0; i < npixels; i++) {
if (depthBuffer[i] < 0 || (depthcopy[i] >= 0 &&
depthcopy[i] < depthBuffer[i])) {
depthBuffer[i] = depthcopy[i];
imageBuffer[i*3+0] = rgbcopy[i*3+0];
imageBuffer[i*3+1] = rgbcopy[i*3+1];
imageBuffer[i*3+2] = rgbcopy[i*3+2];
if (ssao) {
surfaceBuffer[i*2+0] = surfacecopy[i*2+0];
surfaceBuffer[i*2+1] = surfacecopy[i*2+1];
}
}
}
} else if (me >= nhalf && me < 2*nhalf) {
MPI_Send(imageBuffer,npixels*3,MPI_BYTE,me-nhalf,0,world);
MPI_Send(depthBuffer,npixels,MPI_DOUBLE,me-nhalf,0,world);
if (ssao) MPI_Send(surfaceBuffer,npixels*2,MPI_DOUBLE,me-nhalf,0,world);
}
nhalf /= 2;
}
// extra SSAO enhancement
// bcast full image to all procs
// each works on subset of pixels
// gather result back to proc 0
if (ssao) {
MPI_Bcast(imageBuffer,npixels*3,MPI_BYTE,0,world);
MPI_Bcast(surfaceBuffer,npixels*2,MPI_DOUBLE,0,world);
MPI_Bcast(depthBuffer,npixels,MPI_DOUBLE,0,world);
compute_SSAO();
int pixelPart = height/nprocs * width*3;
MPI_Gather(imageBuffer+me*pixelPart,pixelPart,MPI_BYTE,
rgbcopy,pixelPart,MPI_BYTE,0,world);
writeBuffer = rgbcopy;
} else {
writeBuffer = imageBuffer;
}
}
/* ----------------------------------------------------------------------
draw simulation bounding box as 12 cylinders
------------------------------------------------------------------------- */
void Image::draw_box(double (*corners)[3], double diameter)
{
draw_cylinder(corners[0],corners[1],boxcolor,diameter,3);
draw_cylinder(corners[2],corners[3],boxcolor,diameter,3);
draw_cylinder(corners[0],corners[2],boxcolor,diameter,3);
draw_cylinder(corners[1],corners[3],boxcolor,diameter,3);
draw_cylinder(corners[0],corners[4],boxcolor,diameter,3);
draw_cylinder(corners[1],corners[5],boxcolor,diameter,3);
draw_cylinder(corners[2],corners[6],boxcolor,diameter,3);
draw_cylinder(corners[3],corners[7],boxcolor,diameter,3);
draw_cylinder(corners[4],corners[5],boxcolor,diameter,3);
draw_cylinder(corners[6],corners[7],boxcolor,diameter,3);
draw_cylinder(corners[4],corners[6],boxcolor,diameter,3);
draw_cylinder(corners[5],corners[7],boxcolor,diameter,3);
}
/* ----------------------------------------------------------------------
draw XYZ axes in red/green/blue
axes = 4 end points
------------------------------------------------------------------------- */
void Image::draw_axes(double (*axes)[3], double diameter)
{
draw_cylinder(axes[0],axes[1],color2rgb("red"),diameter,3);
draw_cylinder(axes[0],axes[2],color2rgb("green"),diameter,3);
draw_cylinder(axes[0],axes[3],color2rgb("blue"),diameter,3);
}
/* ----------------------------------------------------------------------
draw sphere at x with surfaceColor and diameter
render pixel by pixel onto image plane with depth buffering
------------------------------------------------------------------------- */
void Image::draw_sphere(double *x, double *surfaceColor, double diameter)
{
int ix,iy;
double projRad;
double xlocal[3],surface[3];
double depth;
xlocal[0] = x[0] - xctr;
xlocal[1] = x[1] - yctr;
xlocal[2] = x[2] - zctr;
double xmap = MathExtra::dot3(camRight,xlocal);
double ymap = MathExtra::dot3(camUp,xlocal);
double dist = MathExtra::dot3(camPos,camDir) - MathExtra::dot3(xlocal,camDir);
double radius = 0.5*diameter;
double radsq = radius*radius;
double pixelWidth = (tanPerPixel > 0) ? tanPerPixel * dist :
-tanPerPixel / zoom;
double pixelRadiusFull = radius / pixelWidth;
int pixelRadius = static_cast<int> (pixelRadiusFull + 0.5) + 1;
double xf = xmap / pixelWidth;
double yf = ymap / pixelWidth;
int xc = static_cast<int> (xf);
int yc = static_cast<int> (yf);
double width_error = xf - xc;
double height_error = yf - yc;
// shift 0,0 to screen center (vs lower left)
xc += width / 2;
yc += height / 2;
for (iy = yc - pixelRadius; iy <= yc + pixelRadius; iy++) {
for (ix = xc - pixelRadius; ix <= xc + pixelRadius; ix++) {
if (iy < 0 || iy >= height || ix < 0 || ix >= width) continue;
surface[1] = ((iy - yc) - height_error) * pixelWidth;
surface[0] = ((ix - xc) - width_error) * pixelWidth;
projRad = surface[0]*surface[0] + surface[1]*surface[1];
// outside the sphere in the projected image
if (projRad > radsq) continue;
surface[2] = sqrt(radsq - projRad);
depth = dist - surface[2];
surface[0] /= radius;
surface[1] /= radius;
surface[2] /= radius;
draw_pixel (ix, iy, depth, surface, surfaceColor);
}
}
}
/* ----------------------------------------------------------------------
draw axis oriented cube at x with surfaceColor and diameter in size
render pixel by pixel onto image plane with depth buffering
------------------------------------------------------------------------- */
void Image::draw_cube(double *x, double *surfaceColor, double diameter)
{
double xlocal[3],surface[3],normal[3];
double t,tdir[3];
double depth;
xlocal[0] = x[0] - xctr;
xlocal[1] = x[1] - yctr;
xlocal[2] = x[2] - zctr;
double xmap = MathExtra::dot3(camRight,xlocal);
double ymap = MathExtra::dot3(camUp,xlocal);
double dist = MathExtra::dot3(camPos,camDir) - MathExtra::dot3(xlocal,camDir);
double radius = 0.5*diameter;
double pixelWidth = (tanPerPixel > 0) ? tanPerPixel * dist :
-tanPerPixel / zoom;
double halfWidth = diameter;
double pixelHalfWidthFull = halfWidth / pixelWidth;
int pixelHalfWidth = static_cast<int> (pixelHalfWidthFull + 0.5);
double xf = xmap / pixelWidth;
double yf = ymap / pixelWidth;
int xc = static_cast<int> (xf);
int yc = static_cast<int> (yf);
double width_error = xf - xc;
double height_error = yf - yc;
// shift 0,0 to screen center (vs lower left)
xc += width / 2;
yc += height / 2;
for (int iy = yc - pixelHalfWidth; iy <= yc + pixelHalfWidth; iy ++) {
for (int ix = xc - pixelHalfWidth; ix <= xc + pixelHalfWidth; ix ++) {
if (iy < 0 || iy >= height || ix < 0 || ix >= width) continue;
double sy = ((iy - yc) - height_error) * pixelWidth;
double sx = ((ix - xc) - width_error) * pixelWidth;
surface[0] = camRight[0] * sx + camUp[0] * sy;
surface[1] = camRight[1] * sx + camUp[1] * sy;
surface[2] = camRight[2] * sx + camUp[2] * sy;
// iterate through each of the 6 axis-oriented planes of the box
// only render up to 3 which are facing the camera
// these checks short circuit a dot product, testing for > 0
for (int dim = 0; dim < 3; dim ++) {
if (camDir[dim] > 0) { // positive faces camera
t = (radius - surface[dim]) / camDir[dim];
normal[0] = camRight[dim];
normal[1] = camUp[dim];
normal[2] = camDir[dim];
} else if (camDir[dim] < 0) { // negative faces camera
t = -(radius + surface[dim]) / camDir[dim];
normal[0] = -camRight[dim];
normal[1] = -camUp[dim];
normal[2] = -camDir[dim];
}
if (camDir[dim] != 0) {
tdir[0] = camDir[0] * t;
tdir[1] = camDir[1] * t;
tdir[2] = camDir[2] * t;
bool xin = ((surface[0]+tdir[0]) >= -radius) &&
((surface[0]+tdir[0]) <= radius);
bool yin = ((surface[1]+tdir[1]) >= -radius) &&
((surface[1]+tdir[1]) <= radius);
bool zin = ((surface[2]+tdir[2]) >= -radius) &&
((surface[2]+tdir[2]) <= radius);
switch (dim) {
case 0:
if (yin & zin) {
depth = dist - t;
draw_pixel (ix, iy, depth, normal, surfaceColor);
}
break;
case 1:
if (xin & zin) {
depth = dist - t;
draw_pixel (ix, iy, depth, normal, surfaceColor);
}
break;
case 2:
if (xin & yin) {
depth = dist - t;
draw_pixel (ix, iy, depth, normal, surfaceColor);
}
break;
}
}
}
}
}
}
/* ----------------------------------------------------------------------
draw cylinder from x to y with surfaceColor and diameter
render pixel by pixel onto image plane with depth buffering
if sflag = 0, draw no end spheres
if sflag = 1, draw 1st end sphere
if sflag = 2, draw 2nd end sphere
if sflag = 3, draw both end spheres
------------------------------------------------------------------------- */
void Image::draw_cylinder(double *x, double *y,
double *surfaceColor, double diameter, int sflag)
{
double surface[3], normal[3];
double mid[3],xaxis[3],yaxis[3],zaxis[3];
double camLDir[3], camLRight[3], camLUp[3];
double zmin, zmax;
if (sflag % 2) draw_sphere(x,surfaceColor,diameter);
if (sflag/2) draw_sphere(y,surfaceColor,diameter);
double radius = 0.5*diameter;
double radsq = radius*radius;
zaxis[0] = y[0] - x[0];
zaxis[1] = y[1] - x[1];
zaxis[2] = y[2] - x[2];
double rasterWidth = fabs(MathExtra::dot3(zaxis, camRight)) + diameter;
double rasterHeight = fabs(MathExtra::dot3(zaxis, camUp)) + diameter;
mid[0] = (y[0] + x[0]) * 0.5 - xctr;
mid[1] = (y[1] + x[1]) * 0.5 - yctr;
mid[2] = (y[2] + x[2]) * 0.5 - zctr;
double len = MathExtra::len3(zaxis);
MathExtra::scale3(1.0/len,zaxis);
len *= 0.5;
zmax = len;
zmin = -len;
double xmap = MathExtra::dot3(camRight,mid);
double ymap = MathExtra::dot3(camUp,mid);
double dist = MathExtra::dot3(camPos,camDir) - MathExtra::dot3(mid,camDir);
double pixelWidth = (tanPerPixel > 0) ? tanPerPixel * dist :
-tanPerPixel / zoom;
double xf = xmap / pixelWidth;
double yf = ymap / pixelWidth;
int xc = static_cast<int> (xf);
int yc = static_cast<int> (yf);
double width_error = xf - xc;
double height_error = yf - yc;
// shift 0,0 to screen center (vs lower left)
xc += width / 2;
yc += height / 2;
double pixelHalfWidthFull = (rasterWidth * 0.5) / pixelWidth;
double pixelHalfHeightFull = (rasterHeight * 0.5) / pixelWidth;
int pixelHalfWidth = static_cast<int> (pixelHalfWidthFull + 0.5);
int pixelHalfHeight = static_cast<int> (pixelHalfHeightFull + 0.5);
if (zaxis[0] == camDir[0] && zaxis[1] == camDir[1] && zaxis[2] == camDir[2])
return;
if (zaxis[0] == -camDir[0] && zaxis[1] == -camDir[1] &&
zaxis[2] == -camDir[2]) return;
MathExtra::cross3(zaxis,camDir,yaxis);
MathExtra::norm3(yaxis);
MathExtra::cross3(yaxis,zaxis,xaxis);
MathExtra::norm3(xaxis);
camLDir[0] = MathExtra::dot3(camDir,xaxis);
camLDir[1] = 0.0;
camLDir[2] = MathExtra::dot3(camDir,zaxis);
camLRight[0] = MathExtra::dot3(camRight,xaxis);
camLRight[1] = MathExtra::dot3(camRight,yaxis);
camLRight[2] = MathExtra::dot3(camRight,zaxis);
MathExtra::norm3(camLRight);
camLUp[0] = MathExtra::dot3(camUp,xaxis);
camLUp[1] = MathExtra::dot3(camUp,yaxis);
camLUp[2] = MathExtra::dot3(camUp,zaxis);
MathExtra::norm3(camLUp);
double a = camLDir[0] * camLDir[0];
for (int iy = yc - pixelHalfHeight; iy <= yc + pixelHalfHeight; iy ++) {
for (int ix = xc - pixelHalfWidth; ix <= xc + pixelHalfWidth; ix ++) {
if (iy < 0 || iy >= height || ix < 0 || ix >= width) continue;
double sy = ((iy - yc) - height_error) * pixelWidth;
double sx = ((ix - xc) - width_error) * pixelWidth;
surface[0] = camLRight[0] * sx + camLUp[0] * sy;
surface[1] = camLRight[1] * sx + camLUp[1] * sy;
surface[2] = camLRight[2] * sx + camLUp[2] * sy;
double b = 2 * camLDir[0] * surface[0];
double c = surface[0] * surface[0] + surface[1] * surface[1] - radsq;
double partial = b*b - 4*a*c;
if (partial < 0) continue;
partial = sqrt (partial);
double t = (-b + partial) / (2*a);
double t2 = (-b - partial) / (2*a);
if (t2 > t) { t = t2; }
surface[0] += t * camLDir[0];
surface[1] += t * camLDir[1];
surface[2] += t * camLDir[2];
if (surface[2] > zmax || surface[2] < zmin) continue;
// convert surface into the surface normal
normal[0] = surface[0] / radius;
normal[1] = surface[1] / radius;
normal[2] = 0.0;
// in camera space
surface[0] = MathExtra::dot3 (normal, camLRight);
surface[1] = MathExtra::dot3 (normal, camLUp);
surface[2] = MathExtra::dot3 (normal, camLDir);
double depth = dist - t;
draw_pixel (ix, iy, depth, surface, surfaceColor);
}
}
}
/* ----------------------------------------------------------------------
draw triangle with 3 corner points x,y,z and surfaceColor
------------------------------------------------------------------------- */
void Image::draw_triangle(double *x, double *y, double *z, double *surfaceColor)
{
double d1[3], d1len, d2[3], d2len, normal[3], invndotd;
double xlocal[3], ylocal[3], zlocal[3];
double surface[3];
double depth;
xlocal[0] = x[0] - xctr;
xlocal[1] = x[1] - yctr;
xlocal[2] = x[2] - zctr;
ylocal[0] = y[0] - xctr;
ylocal[1] = y[1] - yctr;
ylocal[2] = y[2] - zctr;
zlocal[0] = z[0] - xctr;
zlocal[1] = z[1] - yctr;
zlocal[2] = z[2] - zctr;
MathExtra::sub3 (xlocal, ylocal, d1);
d1len = MathExtra::len3 (d1);
MathExtra::scale3 (1.0 / d1len, d1);
MathExtra::sub3 (zlocal, ylocal, d2);
d2len = MathExtra::len3 (d2);
MathExtra::scale3 (1.0 / d2len, d2);
MathExtra::cross3 (d1, d2, normal);
MathExtra::norm3 (normal);
invndotd = 1.0 / MathExtra::dot3(normal, camDir);
// invalid triangle (parallel)
if (invndotd == 0) return;
double r[3],u[3];
r[0] = MathExtra::dot3(camRight,xlocal);
r[1] = MathExtra::dot3(camRight,ylocal);
r[2] = MathExtra::dot3(camRight,zlocal);
u[0] = MathExtra::dot3(camUp,xlocal);
u[1] = MathExtra::dot3(camUp,ylocal);
u[2] = MathExtra::dot3(camUp,zlocal);
double rasterLeft = r[0] - MIN(r[0],MIN(r[1],r[2]));
double rasterRight = MAX(r[0],MAX(r[1],r[2])) - r[0];
double rasterDown = u[0] - MIN(u[0],MIN(u[1],u[2]));
double rasterUp = MAX(u[0],MAX(u[1],u[2])) - u[0];
double xmap = MathExtra::dot3(camRight,xlocal);
double ymap = MathExtra::dot3(camUp,xlocal);
double dist = MathExtra::dot3(camPos,camDir) - MathExtra::dot3(xlocal,camDir);
double pixelWidth = (tanPerPixel > 0) ? tanPerPixel * dist :
-tanPerPixel / zoom;
double xf = xmap / pixelWidth;
double yf = ymap / pixelWidth;
int xc = static_cast<int> (xf);
int yc = static_cast<int> (yf);
double width_error = xf - xc;
double height_error = yf - yc;
// shift 0,0 to screen center (vs lower left)
xc += width / 2;
yc += height / 2;
double pixelLeftFull = rasterLeft / pixelWidth;
double pixelRightFull = rasterRight / pixelWidth;
double pixelDownFull = rasterDown / pixelWidth;
double pixelUpFull = rasterUp / pixelWidth;
int pixelLeft = static_cast<int> (pixelLeftFull + 0.5);
int pixelRight = static_cast<int> (pixelRightFull + 0.5);
int pixelDown = static_cast<int> (pixelDownFull + 0.5);
int pixelUp = static_cast<int> (pixelUpFull + 0.5);
for (int iy = yc - pixelDown; iy <= yc + pixelUp; iy ++) {
for (int ix = xc - pixelLeft; ix <= xc + pixelRight; ix ++) {
if (iy < 0 || iy >= height || ix < 0 || ix >= width) continue;
double sy = ((iy - yc) - height_error) * pixelWidth;
double sx = ((ix - xc) - width_error) * pixelWidth;
surface[0] = camRight[0] * sx + camUp[0] * sy;
surface[1] = camRight[1] * sx + camUp[1] * sy;
surface[2] = camRight[2] * sx + camUp[2] * sy;
double t = -MathExtra::dot3(normal,surface) * invndotd;
// test inside the triangle
double p[3];
p[0] = xlocal[0] + surface[0] + camDir[0] * t;
p[1] = xlocal[1] + surface[1] + camDir[1] * t;
p[2] = xlocal[2] + surface[2] + camDir[2] * t;
double s1[3], s2[3], s3[3];
double c1[3], c2[3];
MathExtra::sub3 (zlocal, xlocal, s1);
MathExtra::sub3 (ylocal, xlocal, s2);
MathExtra::sub3 (p, xlocal, s3);
MathExtra::cross3 (s1, s2, c1);
MathExtra::cross3 (s1, s3, c2);
if (MathExtra::dot3 (c1, c2) <= 0) continue;
MathExtra::sub3 (xlocal, ylocal, s1);
MathExtra::sub3 (zlocal, ylocal, s2);
MathExtra::sub3 (p, ylocal, s3);
MathExtra::cross3 (s1, s2, c1);
MathExtra::cross3 (s1, s3, c2);
if (MathExtra::dot3 (c1, c2) <= 0) continue;
MathExtra::sub3 (ylocal, zlocal, s1);
MathExtra::sub3 (xlocal, zlocal, s2);
MathExtra::sub3 (p, zlocal, s3);
MathExtra::cross3 (s1, s2, c1);
MathExtra::cross3 (s1, s3, c2);
if (MathExtra::dot3 (c1, c2) <= 0) continue;
double cNormal[3];
cNormal[0] = MathExtra::dot3(camRight, normal);
cNormal[1] = MathExtra::dot3(camUp, normal);
cNormal[2] = MathExtra::dot3(camDir, normal);
depth = dist - t;
draw_pixel(ix,iy,depth,cNormal,surfaceColor);
}
}
}
/* ---------------------------------------------------------------------- */
void Image::draw_pixel(int ix, int iy, double depth,
double *surface, double *surfaceColor)
{
double diffuseKey,diffuseFill,diffuseBack,specularKey;
if (depth < 0 || (depthBuffer[ix + iy*width] >= 0 &&
depth >= depthBuffer[ix + iy*width])) return;
depthBuffer[ix + iy*width] = depth;
// store only the tangent relative to the camera normal (0,0,-1)
surfaceBuffer[0 + ix * 2 + iy*width * 2] = surface[1];
surfaceBuffer[1 + ix * 2 + iy*width * 2] = -surface[0];
diffuseKey = saturate(MathExtra::dot3(surface, keyLightDir));
diffuseFill = saturate(MathExtra::dot3(surface, fillLightDir));
diffuseBack = saturate(MathExtra::dot3(surface, backLightDir));
specularKey = pow(saturate(MathExtra::dot3(surface, keyHalfDir)),
specularHardness) * specularIntensity;
double c[3];
c[0] = surfaceColor[0] * ambientColor[0];
c[1] = surfaceColor[1] * ambientColor[1];
c[2] = surfaceColor[2] * ambientColor[2];
c[0] += surfaceColor[0] * keyLightColor[0] * diffuseKey;
c[1] += surfaceColor[1] * keyLightColor[1] * diffuseKey;
c[2] += surfaceColor[2] * keyLightColor[2] * diffuseKey;
c[0] += keyLightColor[0] * specularKey;
c[1] += keyLightColor[1] * specularKey;
c[2] += keyLightColor[2] * specularKey;
c[0] += surfaceColor[0] * fillLightColor[0] * diffuseFill;
c[1] += surfaceColor[1] * fillLightColor[1] * diffuseFill;
c[2] += surfaceColor[2] * fillLightColor[2] * diffuseFill;
c[0] += surfaceColor[0] * backLightColor[0] * diffuseBack;
c[1] += surfaceColor[1] * backLightColor[1] * diffuseBack;
c[2] += surfaceColor[2] * backLightColor[2] * diffuseBack;
c[0] = saturate(c[0]);
c[1] = saturate(c[1]);
c[2] = saturate(c[2]);
imageBuffer[0 + ix*3 + iy*width*3] = static_cast<int>(c[0] * 255.0);
imageBuffer[1 + ix*3 + iy*width*3] = static_cast<int>(c[1] * 255.0);
imageBuffer[2 + ix*3 + iy*width*3] = static_cast<int>(c[2] * 255.0);
}
/* ---------------------------------------------------------------------- */
void Image::compute_SSAO()
{
// used for rasterizing the spheres
double delTheta = 2.0*MY_PI / SSAOSamples;
// typical neighborhood value for shading
double pixelWidth = (tanPerPixel > 0) ? tanPerPixel :
-tanPerPixel / zoom;
int pixelRadius = (int) trunc (SSAORadius / pixelWidth + 0.5);
int x,y,s;
int hPart = height / nprocs;
int index = me * hPart * width;
for (y = me * hPart; y < (me + 1) * hPart; y ++) {
for (x = 0; x < width; x ++, index ++) {
double cdepth = depthBuffer[index];
if (cdepth < 0) { continue; }
double sx = surfaceBuffer[index * 2 + 0];
double sy = surfaceBuffer[index * 2 + 1];
double sin_t = -sqrt(sx*sx + sy*sy);
double mytheta = random->uniform() * SSAOJitter;
double ao = 0.0;
for (s = 0; s < SSAOSamples; s ++) {
double hx = cos(mytheta);
double hy = sin(mytheta);
mytheta += delTheta;
// multiply by z cross surface tangent
// so that dot (aka cos) works here
double scaled_sin_t = sin_t * (hx*sy + hy*sx);
// Bresenham's line algorithm to march over depthBuffer
int dx = static_cast<int> (hx * pixelRadius);
int dy = static_cast<int> (hy * pixelRadius);
int ex = x + dx;
if (ex < 0) { ex = 0; } if (ex >= width) { ex = width - 1; }
int ey = y + dy;
if (ey < 0) { ey = 0; } if (ey >= height) { ey = height - 1; }
double delta;
int small, large;
double lenIncr;
if (fabs(hx) > fabs(hy)) {
small = (hx > 0) ? 1 : -1;
large = (hy > 0) ? width : -width;
delta = fabs(hy / hx);
} else {
small = (hy > 0) ? width : -width;
large = (hx > 0) ? 1 : -1;
delta = fabs(hx / hy);
}
lenIncr = sqrt (1 + delta * delta) * pixelWidth;
// initialize with one step
// because the center point doesn't need testing
int end = ex + ey * width;
int ind = index + small;
double len = lenIncr;
double err = delta;
if (err >= 1.0) {
ind += large;
err -= 1.0;
}
double minPeak = -1;
double peakLen = 0.0;
int stepsTaken = 1;
while ((small > 0 && ind <= end) || (small < 0 && ind >= end)) {
if (ind < 0 || ind >= (width*height)) {
break;
}
// cdepth - depthBuffer B/C we want it in the negative z direction
if (minPeak < 0 || (depthBuffer[ind] >= 0 &&
depthBuffer[ind] < minPeak)) {
minPeak = depthBuffer[ind];
peakLen = len;
}
ind += small;
len += lenIncr;
err += delta;
if (err >= 1.0) {
ind += large;
err -= 1.0;
}
stepsTaken ++;
}
if (peakLen > 0) {
double h = atan ((cdepth - minPeak) / peakLen);
ao += saturate(sin (h) - scaled_sin_t);
} else {
ao += saturate(-scaled_sin_t);
}
}
ao /= (double)SSAOSamples;
double c[3];
c[0] = (double) (*(unsigned char *) &imageBuffer[index * 3 + 0]);
c[1] = (double) (*(unsigned char *) &imageBuffer[index * 3 + 1]);
c[2] = (double) (*(unsigned char *) &imageBuffer[index * 3 + 2]);
c[0] *= (1.0 - ao);
c[1] *= (1.0 - ao);
c[2] *= (1.0 - ao);
imageBuffer[index * 3 + 0] = (int) c[0];
imageBuffer[index * 3 + 1] = (int) c[1];
imageBuffer[index * 3 + 2] = (int) c[2];
}
}
}
/* ---------------------------------------------------------------------- */
void Image::write_JPG(FILE *fp)
{
#ifdef LAMMPS_JPEG
struct jpeg_compress_struct cinfo;
struct jpeg_error_mgr jerr;
JSAMPROW row_pointer;
cinfo.err = jpeg_std_error(&jerr);
jpeg_create_compress(&cinfo);
jpeg_stdio_dest(&cinfo,fp);
cinfo.image_width = width;
cinfo.image_height = height;
cinfo.input_components = 3;
cinfo.in_color_space = JCS_RGB;
jpeg_set_defaults(&cinfo);
jpeg_set_quality(&cinfo,85,TRUE);
jpeg_start_compress(&cinfo,TRUE);
while (cinfo.next_scanline < cinfo.image_height) {
row_pointer = (JSAMPROW)
&writeBuffer[(cinfo.image_height - 1 - cinfo.next_scanline) * 3 * width];
jpeg_write_scanlines(&cinfo,&row_pointer,1);
}
jpeg_finish_compress(&cinfo);
jpeg_destroy_compress(&cinfo);
#endif
}
/* ---------------------------------------------------------------------- */
void Image::write_PNG(FILE *fp)
{
#ifdef LAMMPS_PNG
png_structp png_ptr;
png_infop info_ptr;
png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
if (!png_ptr) return;
info_ptr = png_create_info_struct(png_ptr);
if (!info_ptr) {
png_destroy_write_struct(&png_ptr, NULL);
return;
}
if (setjmp(png_jmpbuf(png_ptr))) {
png_destroy_write_struct(&png_ptr, &info_ptr);
return;
}
png_init_io(png_ptr, fp);
png_set_compression_level(png_ptr,Z_BEST_COMPRESSION);
png_set_IHDR(png_ptr,info_ptr,width,height,8,PNG_COLOR_TYPE_RGB,
PNG_INTERLACE_NONE,PNG_COMPRESSION_TYPE_DEFAULT,PNG_FILTER_TYPE_DEFAULT);
png_text text_ptr[2];
memset(text_ptr,0,2*sizeof(png_text));
char key0[] = "Software";
char text0[] = "LAMMPS " LAMMPS_VERSION;
char key1[] = "Description";
char text1[] = "Dump image snapshot";
text_ptr[0].key = key0;
text_ptr[0].text = text0;
text_ptr[1].key = key1;
text_ptr[1].text = text1;
text_ptr[0].compression = PNG_TEXT_COMPRESSION_NONE;
text_ptr[1].compression = PNG_TEXT_COMPRESSION_NONE;
png_set_text(png_ptr,info_ptr,text_ptr,1);
png_write_info(png_ptr,info_ptr);
png_bytep row_pointers[height];
for (int i=0; i < height; ++i)
row_pointers[i] = (png_bytep) &writeBuffer[(height-i-1)*3*width];
png_write_image(png_ptr, row_pointers);
png_write_end(png_ptr, info_ptr);
png_destroy_write_struct(&png_ptr, &info_ptr);
#endif
}
/* ---------------------------------------------------------------------- */
void Image::write_PPM(FILE *fp)
{
fprintf(fp,"P6\n%d %d\n255\n",width,height);
int y;
for (y = height-1; y >= 0; y--)
fwrite(&writeBuffer[y*width*3],3,width,fp);
}
/* ----------------------------------------------------------------------
return static/dynamic status of color map index
------------------------------------------------------------------------- */
int Image::map_dynamic(int index)
{
return maps[index]->dynamic;
}
/* ----------------------------------------------------------------------
redefine properties of the color map index
return 1 if any error in args, else return 0
------------------------------------------------------------------------- */
int Image::map_reset(int index, int narg, char **arg)
{
return maps[index]->reset(narg,arg);
}
/* ----------------------------------------------------------------------
set min/max bounds of dynamic color map index
------------------------------------------------------------------------- */
int Image::map_minmax(int index, double mindynamic, double maxdynamic)
{
return maps[index]->minmax(mindynamic,maxdynamic);
}
/* ----------------------------------------------------------------------
return 3-vector color corresponding to value from color map index
------------------------------------------------------------------------- */
double *Image::map_value2color(int index, double value)
{
return maps[index]->value2color(value);
}
/* ----------------------------------------------------------------------
add a new color to username and userrgb
redefine RGB values in userrgb if name already exists
return 1 if RGB values are invalid, else return 0
------------------------------------------------------------------------- */
int Image::addcolor(char *name, double r, double g, double b)
{
int icolor;
for (icolor = 0; icolor < ncolors; icolor++)
if (strcmp(name,username[icolor]) == 0) break;
if (icolor == ncolors) {
username = (char **)
memory->srealloc(username,(ncolors+1)*sizeof(char *),"image:username");
memory->grow(userrgb,ncolors+1,3,"image:userrgb");
ncolors++;
}
int n = strlen(name) + 1;
username[icolor] = new char[n];
strcpy(username[icolor],name);
if (r < 0.0 || r > 1.0 || g < 0.0 || g > 1.0 || b < 0.0 || b > 1.0)
return 1;
userrgb[icolor][0] = r;
userrgb[icolor][1] = g;
userrgb[icolor][2] = b;
return 0;
}
/* ----------------------------------------------------------------------
if index > 0, return ptr to index-1 color from rgb
if index < 0, return ptr to -index-1 color from userrgb
if index = 0, search the 2 lists of color names for the string color
search user-defined color names first, then the list of NCOLORS names
return a pointer to the 3 floating point RGB values or NULL if didn't find
------------------------------------------------------------------------- */
double *Image::color2rgb(const char *color, int index)
{
static const char *name[NCOLORS] = {
"aliceblue",
"antiquewhite",
"aqua",
"aquamarine",
"azure",
"beige",
"bisque",
"black",
"blanchedalmond",
"blue",
"blueviolet",
"brown",
"burlywood",
"cadetblue",
"chartreuse",
"chocolate",
"coral",
"cornflowerblue",
"cornsilk",
"crimson",
"cyan",
"darkblue",
"darkcyan",
"darkgoldenrod",
"darkgray",
"darkgreen",
"darkkhaki",
"darkmagenta",
"darkolivegreen",
"darkorange",
"darkorchid",
"darkred",
"darksalmon",
"darkseagreen",
"darkslateblue",
"darkslategray",
"darkturquoise",
"darkviolet",
"deeppink",
"deepskyblue",
"dimgray",
"dodgerblue",
"firebrick",
"floralwhite",
"forestgreen",
"fuchsia",
"gainsboro",
"ghostwhite",
"gold",
"goldenrod",
"gray",
"green",
"greenyellow",
"honeydew",
"hotpink",
"indianred",
"indigo",
"ivory",
"khaki",
"lavender",
"lavenderblush",
"lawngreen",
"lemonchiffon",
"lightblue",
"lightcoral",
"lightcyan",
"lightgoldenrodyellow",
"lightgreen",
"lightgrey",
"lightpink",
"lightsalmon",
"lightseagreen",
"lightskyblue",
"lightslategray",
"lightsteelblue",
"lightyellow",
"lime",
"limegreen",
"linen",
"magenta",
"maroon",
"mediumaquamarine",
"mediumblue",
"mediumorchid",
"mediumpurple",
"mediumseagreen",
"mediumslateblue",
"mediumspringgreen",
"mediumturquoise",
"mediumvioletred",
"midnightblue",
"mintcream",
"mistyrose",
"moccasin",
"navajowhite",
"navy",
"oldlace",
"olive",
"olivedrab",
"orange",
"orangered",
"orchid",
"palegoldenrod",
"palegreen",
"paleturquoise",
"palevioletred",
"papayawhip",
"peachpuff",
"peru",
"pink",
"plum",
"powderblue",
"purple",
"red",
"rosybrown",
"royalblue",
"saddlebrown",
"salmon",
"sandybrown",
"seagreen",
"seashell",
"sienna",
"silver",
"skyblue",
"slateblue",
"slategray",
"snow",
"springgreen",
"steelblue",
"tan",
"teal",
"thistle",
"tomato",
"turquoise",
"violet",
"wheat",
"white",
"whitesmoke",
"yellow",
"yellowgreen"
};
static double rgb[NCOLORS][3] = {
{240/255.0, 248/255.0, 255/255.0},
{250/255.0, 235/255.0, 215/255.0},
{0/255.0, 255/255.0, 255/255.0},
{127/255.0, 255/255.0, 212/255.0},
{240/255.0, 255/255.0, 255/255.0},
{245/255.0, 245/255.0, 220/255.0},
{255/255.0, 228/255.0, 196/255.0},
{0/255.0, 0/255.0, 0/255.0},
{255/255.0, 255/255.0, 205/255.0},
{0/255.0, 0/255.0, 255/255.0},
{138/255.0, 43/255.0, 226/255.0},
{165/255.0, 42/255.0, 42/255.0},
{222/255.0, 184/255.0, 135/255.0},
{95/255.0, 158/255.0, 160/255.0},
{127/255.0, 255/255.0, 0/255.0},
{210/255.0, 105/255.0, 30/255.0},
{255/255.0, 127/255.0, 80/255.0},
{100/255.0, 149/255.0, 237/255.0},
{255/255.0, 248/255.0, 220/255.0},
{220/255.0, 20/255.0, 60/255.0},
{0/255.0, 255/255.0, 255/255.0},
{0/255.0, 0/255.0, 139/255.0},
{0/255.0, 139/255.0, 139/255.0},
{184/255.0, 134/255.0, 11/255.0},
{169/255.0, 169/255.0, 169/255.0},
{0/255.0, 100/255.0, 0/255.0},
{189/255.0, 183/255.0, 107/255.0},
{139/255.0, 0/255.0, 139/255.0},
{85/255.0, 107/255.0, 47/255.0},
{255/255.0, 140/255.0, 0/255.0},
{153/255.0, 50/255.0, 204/255.0},
{139/255.0, 0/255.0, 0/255.0},
{233/255.0, 150/255.0, 122/255.0},
{143/255.0, 188/255.0, 143/255.0},
{72/255.0, 61/255.0, 139/255.0},
{47/255.0, 79/255.0, 79/255.0},
{0/255.0, 206/255.0, 209/255.0},
{148/255.0, 0/255.0, 211/255.0},
{255/255.0, 20/255.0, 147/255.0},
{0/255.0, 191/255.0, 255/255.0},
{105/255.0, 105/255.0, 105/255.0},
{30/255.0, 144/255.0, 255/255.0},
{178/255.0, 34/255.0, 34/255.0},
{255/255.0, 250/255.0, 240/255.0},
{34/255.0, 139/255.0, 34/255.0},
{255/255.0, 0/255.0, 255/255.0},
{220/255.0, 220/255.0, 220/255.0},
{248/255.0, 248/255.0, 255/255.0},
{255/255.0, 215/255.0, 0/255.0},
{218/255.0, 165/255.0, 32/255.0},
{128/255.0, 128/255.0, 128/255.0},
{0/255.0, 128/255.0, 0/255.0},
{173/255.0, 255/255.0, 47/255.0},
{240/255.0, 255/255.0, 240/255.0},
{255/255.0, 105/255.0, 180/255.0},
{205/255.0, 92/255.0, 92/255.0},
{75/255.0, 0/255.0, 130/255.0},
{255/255.0, 240/255.0, 240/255.0},
{240/255.0, 230/255.0, 140/255.0},
{230/255.0, 230/255.0, 250/255.0},
{255/255.0, 240/255.0, 245/255.0},
{124/255.0, 252/255.0, 0/255.0},
{255/255.0, 250/255.0, 205/255.0},
{173/255.0, 216/255.0, 230/255.0},
{240/255.0, 128/255.0, 128/255.0},
{224/255.0, 255/255.0, 255/255.0},
{250/255.0, 250/255.0, 210/255.0},
{144/255.0, 238/255.0, 144/255.0},
{211/255.0, 211/255.0, 211/255.0},
{255/255.0, 182/255.0, 193/255.0},
{255/255.0, 160/255.0, 122/255.0},
{32/255.0, 178/255.0, 170/255.0},
{135/255.0, 206/255.0, 250/255.0},
{119/255.0, 136/255.0, 153/255.0},
{176/255.0, 196/255.0, 222/255.0},
{255/255.0, 255/255.0, 224/255.0},
{0/255.0, 255/255.0, 0/255.0},
{50/255.0, 205/255.0, 50/255.0},
{250/255.0, 240/255.0, 230/255.0},
{255/255.0, 0/255.0, 255/255.0},
{128/255.0, 0/255.0, 0/255.0},
{102/255.0, 205/255.0, 170/255.0},
{0/255.0, 0/255.0, 205/255.0},
{186/255.0, 85/255.0, 211/255.0},
{147/255.0, 112/255.0, 219/255.0},
{60/255.0, 179/255.0, 113/255.0},
{123/255.0, 104/255.0, 238/255.0},
{0/255.0, 250/255.0, 154/255.0},
{72/255.0, 209/255.0, 204/255.0},
{199/255.0, 21/255.0, 133/255.0},
{25/255.0, 25/255.0, 112/255.0},
{245/255.0, 255/255.0, 250/255.0},
{255/255.0, 228/255.0, 225/255.0},
{255/255.0, 228/255.0, 181/255.0},
{255/255.0, 222/255.0, 173/255.0},
{0/255.0, 0/255.0, 128/255.0},
{253/255.0, 245/255.0, 230/255.0},
{128/255.0, 128/255.0, 0/255.0},
{107/255.0, 142/255.0, 35/255.0},
{255/255.0, 165/255.0, 0/255.0},
{255/255.0, 69/255.0, 0/255.0},
{218/255.0, 112/255.0, 214/255.0},
{238/255.0, 232/255.0, 170/255.0},
{152/255.0, 251/255.0, 152/255.0},
{175/255.0, 238/255.0, 238/255.0},
{219/255.0, 112/255.0, 147/255.0},
{255/255.0, 239/255.0, 213/255.0},
{255/255.0, 239/255.0, 213/255.0},
{205/255.0, 133/255.0, 63/255.0},
{255/255.0, 192/255.0, 203/255.0},
{221/255.0, 160/255.0, 221/255.0},
{176/255.0, 224/255.0, 230/255.0},
{128/255.0, 0/255.0, 128/255.0},
{255/255.0, 0/255.0, 0/255.0},
{188/255.0, 143/255.0, 143/255.0},
{65/255.0, 105/255.0, 225/255.0},
{139/255.0, 69/255.0, 19/255.0},
{250/255.0, 128/255.0, 114/255.0},
{244/255.0, 164/255.0, 96/255.0},
{46/255.0, 139/255.0, 87/255.0},
{255/255.0, 245/255.0, 238/255.0},
{160/255.0, 82/255.0, 45/255.0},
{192/255.0, 192/255.0, 192/255.0},
{135/255.0, 206/255.0, 235/255.0},
{106/255.0, 90/255.0, 205/255.0},
{112/255.0, 128/255.0, 144/255.0},
{255/255.0, 250/255.0, 250/255.0},
{0/255.0, 255/255.0, 127/255.0},
{70/255.0, 130/255.0, 180/255.0},
{210/255.0, 180/255.0, 140/255.0},
{0/255.0, 128/255.0, 128/255.0},
{216/255.0, 191/255.0, 216/255.0},
{253/255.0, 99/255.0, 71/255.0},
{64/255.0, 224/255.0, 208/255.0},
{238/255.0, 130/255.0, 238/255.0},
{245/255.0, 222/255.0, 179/255.0},
{255/255.0, 255/255.0, 255/255.0},
{245/255.0, 245/255.0, 245/255.0},
{255/255.0, 255/255.0, 0/255.0},
{154/255.0, 205/255.0, 50/255.0}
};
if (index > 0) {
if (index > NCOLORS) return NULL;
return rgb[index-1];
}
if (index < 0) {
if (-index > ncolors) return NULL;
return userrgb[-index-1];
}
for (int i = 0; i < ncolors; i++)
if (strcmp(color,username[i]) == 0) return userrgb[i];
for (int i = 0; i < NCOLORS; i++)
if (strcmp(color,name[i]) == 0) return rgb[i];
return NULL;
}
/* ----------------------------------------------------------------------
return number of default colors
------------------------------------------------------------------------- */
int Image::default_colors()
{
return NCOLORS;
}
/* ----------------------------------------------------------------------
search the list of element names for the string element
return a pointer to the 3 floating point RGB values
this list is used by AtomEye and is taken from its Mendeleyev.c file
------------------------------------------------------------------------- */
double *Image::element2color(char *element)
{
static const char *name[NELEMENTS] = {
"H", "He", "Li", "Be", "B", "C", "N", "O", "F", "Ne",
"Na", "Mg", "Al", "Si", "P", "S", "Cl", "Ar", "K", "Ca",
"Sc", "Ti", "V", "Cr", "Mn", "Fe", "Co", "Ni", "Cu", "Zn",
"Ga", "Ge", "As", "Se", "Br", "Kr", "Rb", "Sr", "Y", "Zr",
"Nb", "Mo", "Tc", "Ru", "Rh", "Pd", "Ag", "Cd", "In", "Sn",
"Sb", "Te", "I", "Xe", "Cs", "Ba", "La", "Ce", "Pr", "Nd",
"Pm", "Sm", "Eu", "Gd", "Tb", "Dy", "Ho", "Er", "Tm", "Yb",
"Lu", "Hf", "Ta", "W", "Re", "Os", "Ir", "Pt", "Au", "Hg",
"Tl", "Pb", "Bi", "Po", "At", "Rn", "Fr", "Ra", "Ac", "Th",
"Pa", "U", "Np", "Pu", "Am", "Cm", "Bk", "Cf", "Es", "Fm",
"Md", "No", "Lr", "Rf", "Db", "Sg", "Bh", "Hs", "Mt"
};
static double rgb[NELEMENTS][3] = {
{0.8, 0.8, 0.8},
{0.6431372549, 0.6666666667, 0.6784313725},
{0.7, 0.7, 0.7},
{0.6431372549, 0.6666666667, 0.6784313725},
{0.9, 0.4, 0},
{0.35, 0.35, 0.35},
{0.2, 0.2, 0.8},
{0.8, 0.2, 0.2},
{0.7, 0.85, 0.45},
{0.6431372549, 0.6666666667, 0.6784313725},
{0.6, 0.6, 0.6},
{0.6, 0.6, 0.7},
{0.6431372549, 0.6666666667, 0.6784313725},
{0.6901960784, 0.768627451, 0.8705882353},
{0.1, 0.7, 0.3},
{0.95, 0.9, 0.2},
{0.15, 0.5, 0.1},
{0.6431372549, 0.6666666667, 0.6784313725},
{0.5, 0.5, 0.5},
{0.8, 0.8, 0.7},
{0.6431372549, 0.6666666667, 0.6784313725},
{0.6431372549, 0.6666666667, 0.6784313725},
{0.6431372549, 0.6666666667, 0.6784313725},
{0, 0.8, 0},
{0.6431372549, 0.6666666667, 0.6784313725},
{0.5176470588, 0.5764705882, 0.6529411765},
{0.6431372549, 0.6666666667, 0.6784313725},
{0.257254902, 0.2666666667, 0.271372549},
{0.95, 0.7900735294, 0.01385869565},
{0.6431372549, 0.6666666667, 0.6784313725},
{0.9, 0, 1},
{0.6431372549, 0.6666666667, 0.6784313725},
{1, 1, 0.3},
{0.6431372549, 0.6666666667, 0.6784313725},
{0.5, 0.08, 0.12},
{0.6431372549, 0.6666666667, 0.6784313725},
{0.6431372549, 0.6666666667, 0.6784313725},
{0.6431372549, 0.6666666667, 0.6784313725},
{0.6431372549, 0.6666666667, 0.6784313725},
{0.6431372549, 0.6666666667, 0.6784313725},
{0.6431372549, 0.6666666667, 0.6784313725},
{0.6431372549, 0.6666666667, 0.6784313725},
{0.6431372549, 0.6666666667, 0.6784313725},
{0.6431372549, 0.6666666667, 0.6784313725},
{0.6431372549, 0.6666666667, 0.6784313725},
{0.6431372549, 0.6666666667, 0.6784313725},
{0.6431372549, 0.6666666667, 0.6784313725},
{0.6431372549, 0.6666666667, 0.6784313725},
{0.6431372549, 0.6666666667, 0.6784313725},
{0.6431372549, 0.6666666667, 0.6784313725},
{0.6431372549, 0.6666666667, 0.6784313725},
{0.6431372549, 0.6666666667, 0.6784313725},
{0.5, 0.1, 0.5},
{0.6431372549, 0.6666666667, 0.6784313725},
{0.6431372549, 0.6666666667, 0.6784313725},
{0.6431372549, 0.6666666667, 0.6784313725},
{0.6431372549, 0.6666666667, 0.6784313725},
{0.8, 0.8, 0},
{0.6431372549, 0.6666666667, 0.6784313725},
{0.6431372549, 0.6666666667, 0.6784313725},
{0.6431372549, 0.6666666667, 0.6784313725},
{0.6431372549, 0.6666666667, 0.6784313725},
{0.6431372549, 0.6666666667, 0.6784313725},
{1, 0.8431372549, 0},
{0.6431372549, 0.6666666667, 0.6784313725},
{0.6431372549, 0.6666666667, 0.6784313725},
{0.6431372549, 0.6666666667, 0.6784313725},
{0.6431372549, 0.6666666667, 0.6784313725},
{0.6431372549, 0.6666666667, 0.6784313725},
{0.6431372549, 0.6666666667, 0.6784313725},
{0.6431372549, 0.6666666667, 0.6784313725},
{0.6431372549, 0.6666666667, 0.6784313725},
{0.6431372549, 0.6666666667, 0.6784313725},
{0.6431372549, 0.6666666667, 0.6784313725},
{0.6431372549, 0.6666666667, 0.6784313725},
{0.6431372549, 0.6666666667, 0.6784313725},
{0.6431372549, 0.6666666667, 0.6784313725},
{0.6431372549, 0.6666666667, 0.6784313725},
{0.9, 0.8, 0},
{0.6431372549, 0.6666666667, 0.6784313725},
{0.6431372549, 0.6666666667, 0.6784313725},
{0.6431372549, 0.6666666667, 0.6784313725},
{0.6431372549, 0.6666666667, 0.6784313725},
{0.6431372549, 0.6666666667, 0.6784313725},
{0.8, 0.2, 0.2},
{0.6431372549, 0.6666666667, 0.6784313725},
{0.6431372549, 0.6666666667, 0.6784313725},
{0.6431372549, 0.6666666667, 0.6784313725},
{0.6431372549, 0.6666666667, 0.6784313725},
{0.6431372549, 0.6666666667, 0.6784313725},
{0.6431372549, 0.6666666667, 0.6784313725},
{0.6431372549, 0.6666666667, 0.6784313725},
{0.6431372549, 0.6666666667, 0.6784313725},
{0.6431372549, 0.6666666667, 0.6784313725},
{0.6431372549, 0.6666666667, 0.6784313725},
{0.6431372549, 0.6666666667, 0.6784313725},
{0.6431372549, 0.6666666667, 0.6784313725},
{0.1, 0.7, 0.3},
{0.1, 0.3, 0.7},
{0.6431372549, 0.6666666667, 0.6784313725},
{0.6431372549, 0.6666666667, 0.6784313725},
{0.6431372549, 0.6666666667, 0.6784313725},
{0.6431372549, 0.6666666667, 0.6784313725},
{0.6431372549, 0.6666666667, 0.6784313725},
{0.9, 0.8, 0},
{0.6431372549, 0.6666666667, 0.6784313725},
{0.6431372549, 0.6666666667, 0.6784313725},
{0.6431372549, 0.6666666667, 0.6784313725},
{0.6431372549, 0.6666666667, 0.6784313725}
};
for (int i = 0; i < NELEMENTS; i++)
if (strcmp(element,name[i]) == 0) return rgb[i];
return NULL;
}
/* ----------------------------------------------------------------------
search the list of element names for the string element
return a pointer to the 3 floating point RGB values
this list is used by AtomEye and is taken from its Mendeleyev.c file
------------------------------------------------------------------------- */
double Image::element2diam(char *element)
{
static const char *name[NELEMENTS] = {
"H", "He", "Li", "Be", "B", "C", "N", "O", "F", "Ne",
"Na", "Mg", "Al", "Si", "P", "S", "Cl", "Ar", "K", "Ca",
"Sc", "Ti", "V", "Cr", "Mn", "Fe", "Co", "Ni", "Cu", "Zn",
"Ga", "Ge", "As", "Se", "Br", "Kr", "Rb", "Sr", "Y", "Zr",
"Nb", "Mo", "Tc", "Ru", "Rh", "Pd", "Ag", "Cd", "In", "Sn",
"Sb", "Te", "I", "Xe", "Cs", "Ba", "La", "Ce", "Pr", "Nd",
"Pm", "Sm", "Eu", "Gd", "Tb", "Dy", "Ho", "Er", "Tm", "Yb",
"Lu", "Hf", "Ta", "W", "Re", "Os", "Ir", "Pt", "Au", "Hg",
"Tl", "Pb", "Bi", "Po", "At", "Rn", "Fr", "Ra", "Ac", "Th",
"Pa", "U", "Np", "Pu", "Am", "Cm", "Bk", "Cf", "Es", "Fm",
"Md", "No", "Lr", "Rf", "Db", "Sg", "Bh", "Hs", "Mt"
};
static double diameter[NELEMENTS] = {
0.35, 1.785, 1.45, 1.05, 0.85, 0.72, 0.65, 0.6, 0.5, 1.5662,
1.8, 1.5, 1.4255, 1.07, 1, 1, 1, 1.8597, 2.2, 1.8,
1.6, 1.4, 1.51995, 1.44225, 1.4, 1.43325, 1.35, 1.35, 1.278, 1.35,
1.3, 1.25, 1.15, 1.15, 1.15, 2.0223, 2.35, 2, 1.8, 1.55,
1.6504, 1.3872, 1.35, 1.3, 1.35, 1.4, 1.6, 1.55, 1.55, 1.45,
1.45, 1.4, 1.4, 2.192, 2.6, 2.15, 1.95, 1.85, 1.85, 1.85,
1.85, 1.85, 1.85, 1.8, 1.75, 1.75, 1.75, 1.75, 1.75, 1.75,
1.75, 1.55, 1.6529, 1.5826, 1.35, 1.3, 1.35, 1.35, 1.35, 1.5,
1.9, 1.8, 1.6, 1.9, 1.6, 1.0, 1.0, 2.15, 1.95, 1.8,
1.8, 1.75, 1.75, 1.75, 1.75, 1.0, 1.0, 1.6, 1.6, 1.0,
1.0, 1.0, 1.0, 1.0, 1.6, 1.0, 1.0, 1.0, 1.0
};
for (int i = 0; i < NELEMENTS; i++)
if (strcmp(element,name[i]) == 0) return diameter[i];
return 0.0;
}
// ----------------------------------------------------------------------
// ----------------------------------------------------------------------
// ColorMap class
// ----------------------------------------------------------------------
// ----------------------------------------------------------------------
ColorMap::ColorMap(LAMMPS *lmp, Image *caller) : Pointers(lmp)
{
image = caller;
// default color map
dynamic = 1;
mlo = MINVALUE;
mhi = MAXVALUE;
mstyle = CONTINUOUS;
mrange = FRACTIONAL;
nentry = 2;
mentry = new MapEntry[nentry];
mentry[0].single = MINVALUE;
mentry[0].color = image->color2rgb("blue");
mentry[1].single = MAXVALUE;
mentry[1].color = image->color2rgb("red");
}
/* ---------------------------------------------------------------------- */
ColorMap::~ColorMap()
{
delete [] mentry;
}
/* ----------------------------------------------------------------------
redefine color map
args = lo hi style delta N entry1 entry2 ... entryN as defined by caller
return 1 if any error in args, else return 0
------------------------------------------------------------------------- */
int ColorMap::reset(int narg, char **arg)
{
if (!islower(arg[0][0])) {
mlo = NUMERIC;
mlovalue = force->numeric(FLERR,arg[0]);
} else if (strcmp(arg[0],"min") == 0) mlo = MINVALUE;
else return 1;
if (!islower(arg[1][0])) {
mhi = NUMERIC;
mhivalue = force->numeric(FLERR,arg[1]);
} else if (strcmp(arg[1],"max") == 0) mhi = MAXVALUE;
else return 1;
if (mlo == NUMERIC && mhi == NUMERIC && mlovalue >= mhivalue) return 1;
if (mlo == MINVALUE || mhi == MAXVALUE) dynamic = 1;
else dynamic = 0;
if (strlen(arg[2]) != 2) return 1;
if (arg[2][0] == 'c') mstyle = CONTINUOUS;
else if (arg[2][0] == 'd') mstyle = DISCRETE;
else if (arg[2][0] == 's') mstyle = SEQUENTIAL;
else return 1;
if (arg[2][1] == 'a') mrange = ABSOLUTE;
else if (arg[2][1] == 'f') mrange = FRACTIONAL;
else return 1;
if (mstyle == SEQUENTIAL) {
mbinsize = force->numeric(FLERR,arg[3]);
if (mbinsize <= 0.0) return 1;
mbinsizeinv = 1.0/mbinsize;
}
nentry = force->inumeric(FLERR,arg[4]);
if (nentry < 1) return 1;
delete [] mentry;
mentry = new MapEntry[nentry];
int expandflag = 0;
int n = 5;
for (int i = 0; i < nentry; i++) {
if (mstyle == CONTINUOUS) {
if (n+2 > narg) return 1;
if (!islower(arg[n][0])) {
mentry[i].single = NUMERIC;
mentry[i].svalue = force->numeric(FLERR,arg[n]);
} else if (strcmp(arg[n],"min") == 0) mentry[i].single = MINVALUE;
else if (strcmp(arg[n],"max") == 0) mentry[i].single = MAXVALUE;
else return 1;
mentry[i].color = image->color2rgb(arg[n+1]);
n += 2;
} else if (mstyle == DISCRETE) {
if (n+3 > narg) return 1;
if (!islower(arg[n][0])) {
mentry[i].lo = NUMERIC;
mentry[i].lvalue = force->numeric(FLERR,arg[n]);
} else if (strcmp(arg[n],"min") == 0) mentry[i].lo = MINVALUE;
else if (strcmp(arg[n],"max") == 0) mentry[i].lo = MAXVALUE;
else return 1;
if (!islower(arg[n+1][0])) {
mentry[i].hi = NUMERIC;
mentry[i].hvalue = force->numeric(FLERR,arg[n+1]);
} else if (strcmp(arg[n+1],"min") == 0) mentry[i].hi = MINVALUE;
else if (strcmp(arg[n+1],"max") == 0) mentry[i].hi = MAXVALUE;
else return 1;
mentry[i].color = image->color2rgb(arg[n+2]);
n += 3;
} else if (mstyle == SEQUENTIAL) {
// NOTE: this is unfinished code, not sure how useful it is
// idea is to allow a list of colors to be specified with a single arg
// problem is that sequential colors in ALL are not very different
// e.g. ALL or USER or ALL5:10 or USER1:10:2
// current code is just 1st nentry values of ALL or USER
// need to comment out error check in DumpImage::modify_param()
// for amap check on (narg < n) to get it to work
// need to add extra logic here to check not accessing undefined colors
if (i == 0) {
if (n+1 > narg) return 1;
if (strcmp(arg[n],"ALL") == 0) expandflag = 1;
if (strcmp(arg[n],"USER") == 0) expandflag = 2;
}
if (expandflag == 0) {
if (n+1 > narg) return 1;
mentry[i].color = image->color2rgb(arg[n]);
} else if (expandflag == 1) {
mentry[i].color = image->color2rgb(NULL,i+1);
} else if (expandflag == 2) {
mentry[i].color = image->color2rgb(NULL,-(i+1));
}
n += 1;
}
if (mentry[i].color == NULL) return 1;
}
if (mstyle == CONTINUOUS) {
if (nentry < 2) return 1;
if (mentry[0].single != MINVALUE || mentry[nentry-1].single != MAXVALUE)
return 1;
for (int i = 2; i < nentry-1; i++)
if (mentry[i].svalue <= mentry[i-1].svalue) return 1;
} else if (mstyle == DISCRETE) {
if (nentry < 1) return 1;
if (mentry[nentry-1].lo != MINVALUE || mentry[nentry-1].hi != MAXVALUE)
return 1;
} else if (mstyle == SEQUENTIAL) {
if (nentry < 1) return 1;
}
// one-time call to minmax if color map is static
if (!dynamic) return minmax(mlovalue,mhivalue);
return 0;
}
/* ----------------------------------------------------------------------
set explicit values for all min/max settings in color map
from min/max dynamic values
set lo/hi current and lvalue/hvalue entries that are MIN/MAX VALUE
called only once if mlo/mhi != MIN/MAX VALUE, else called repeatedly
return 1 = error if any values now overlap incorrectly with dynamic bounds
else return 0
------------------------------------------------------------------------- */
int ColorMap::minmax(double mindynamic, double maxdynamic)
{
if (mlo == MINVALUE) locurrent = mindynamic;
else locurrent = mlovalue;
if (mhi == MAXVALUE) hicurrent = maxdynamic;
else hicurrent = mhivalue;
if (locurrent > hicurrent) return 1;
if (mstyle == CONTINUOUS) {
if (mrange == ABSOLUTE) mentry[0].svalue = locurrent;
else mentry[0].svalue = 0.0;
if (mrange == ABSOLUTE) mentry[nentry-1].svalue = hicurrent;
else mentry[nentry-1].svalue = 1.0;
// error in ABSOLUTE mode if new lo/hi current cause
// first/last entry to become lo > hi with adjacent entry
if (mrange == ABSOLUTE) {
if (mentry[0].svalue > mentry[1].svalue) return 1;
if (mentry[nentry-2].svalue > mentry[nentry-1].svalue) return 1;
}
// OK if new lo/hi current cause an entry to have lo > hi,
// since last entry will always be a match
} else if (mstyle == DISCRETE) {
for (int i = 0; i < nentry; i++) {
if (mentry[i].lo == MINVALUE) {
if (mrange == ABSOLUTE) mentry[i].lvalue = locurrent;
else mentry[i].lvalue = 0.0;
}
if (mentry[i].hi == MAXVALUE) {
if (mrange == ABSOLUTE) mentry[i].hvalue = hicurrent;
else mentry[i].hvalue = 1.0;
}
}
}
return 0;
}
/* ----------------------------------------------------------------------
convert value into an RGB color via color map
return pointer to 3-vector
------------------------------------------------------------------------- */
double *ColorMap::value2color(double value)
{
double lo;//,hi;
value = MAX(value,locurrent);
value = MIN(value,hicurrent);
if (mrange == FRACTIONAL) {
if (locurrent == hicurrent) value = 0.0;
else value = (value-locurrent) / (hicurrent-locurrent);
lo = 0.0;
//hi = 1.0;
} else {
lo = locurrent;
//hi = hicurrent;
}
if (mstyle == CONTINUOUS) {
for (int i = 0; i < nentry-1; i++)
if (value >= mentry[i].svalue && value <= mentry[i+1].svalue) {
double fraction = (value-mentry[i].svalue) /
(mentry[i+1].svalue-mentry[i].svalue);
interpolate[0] = mentry[i].color[0] +
fraction*(mentry[i+1].color[0]-mentry[i].color[0]);
interpolate[1] = mentry[i].color[1] +
fraction*(mentry[i+1].color[1]-mentry[i].color[1]);
interpolate[2] = mentry[i].color[2] +
fraction*(mentry[i+1].color[2]-mentry[i].color[2]);
return interpolate;
}
} else if (mstyle == DISCRETE) {
for (int i = 0; i < nentry; i++)
if (value >= mentry[i].lvalue && value <= mentry[i].hvalue)
return mentry[i].color;
} else {
int ibin = static_cast<int> ((value-lo) * mbinsizeinv);
return mentry[ibin%nentry].color;
}
return NULL;
}

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