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/*******************************************************************************
* *
* Viewmol *
* *
* R A Y . C *
* *
* Copyright (c) Joerg-R. Hill, December 2000 *
* *
********************************************************************************
*
* $Id: ray.c,v 1.5 2000/12/10 15:14:33 jrh Exp $
* $Log: ray.c,v $
* Revision 1.5 2000/12/10 15:14:33 jrh
* Release 2.3
*
* Revision 1.4 1999/05/24 01:27:03 jrh
* Release 2.2.1
*
* Revision 1.3 1999/02/07 21:55:11 jrh
* Release 2.2
*
* Revision 1.2 1998/01/26 00:49:07 jrh
* Release 2.1
*
* Revision 1.1 1996/12/10 18:43:24 jrh
* Initial revision
*
*/
#include<math.h>
#include<stdio.h>
#include<unistd.h>
#include<GL/glu.h>
#include "viewmol.h"
#include "dialog.h"
extern void transformCoordinates(int, float input[4], float output[4]);
extern void *getmem(size_t, size_t);
extern void fremem(void **);
extern struct WINDOW windows[];
extern struct MOLECULE *molecules;
extern struct ELEMENT *elements;
extern double tmat[4][4];
extern GLfloat light0p[], light1p[];
extern float *transObject;
extern int ne, iwavef, lights, projectionMode;
static struct ELEMENT *material;
static double n[3];
static int printNormal=FALSE;
static FILE *f;
FILE *raytraceInit(char *filename, Dimension width, Dimension height)
{
struct MOLECULE *mol;
struct ELEMENT *element;
FILE *file;
double todeg=45.0/atan(1.0);
GLfloat xview, zview, light[4], lookat[4]={0.0, 0.0, -1.0, 1.0}, up[4]={0.0, 1.0, 0.0, 1.0};
int *done, hbond;
register int i, j;
if ((file=fopen(filename, "w")) == NULL) return(NULL);
fprintf(file, "screen %d %d\n", width, height);
if (2.0*windows[VIEWER].far > transObject[3*VIEWPOINT+2])
zview=2.0*windows[VIEWER].far-transObject[3*VIEWPOINT+2];
else
zview=0.1;
xview=-0.75*windows[VIEWER].near*windows[VIEWER].top*(GLfloat)(width)/(windows[VIEWER].far
*(GLfloat)(height));
fprintf(file, "eyep %12.7f %12.7f %12.7f\n", (-transObject[3*VIEWPOINT]),
(-transObject[3*VIEWPOINT+1]), zview+windows[VIEWER].far);
transformCoordinates(VIEWPOINT, lookat, light);
light[0]*=(float)(10.0*windows[VIEWER].far-transObject[3*VIEWPOINT+2]);
light[1]*=(float)(10.0*windows[VIEWER].far-transObject[3*VIEWPOINT+2]);
light[2]*=(float)(10.0*windows[VIEWER].far-transObject[3*VIEWPOINT+2]);
fprintf(file, "lookp %12.7f %12.7f %12.7f\n", light[0]-transObject[3*VIEWPOINT],
light[1]-transObject[3*VIEWPOINT+1], light[2]-transObject[3*VIEWPOINT+2]);
fprintf(file, "fov %f\n", 2.0*todeg*atan((double)(xview/zview)));
transformCoordinates(VIEWPOINT, up, light);
fprintf(file, "up %12.7f %12.7f %12.7f\n", light[0], light[1], light[2]);
fprintf(file, "background %6.3f %6.3f %6.3f\n", windows[VIEWER].background_rgb[0],
windows[VIEWER].background_rgb[1], windows[VIEWER].background_rgb[2]);
if (lights & 0x1)
{
transformCoordinates(LIGHTNO0, light0p, light);
fprintf(file, "light 1.0 directional %10.5f %10.5f %10.5f noshadow\n",
light[0], light[1], light[2]);
}
if (lights & 0x2)
{
transformCoordinates(LIGHTNO1, light1p, light);
fprintf(file, "light 0.5 directional %10.5f %10.5f %10.5f\n", light[0],
light[1], light[2]);
}
if (windows[VIEWER].set >= 0)
mol=&molecules[windows[VIEWER].set];
else
mol=&molecules[0];
hbond=FALSE;
for (i=0; i<mol->nb; i++)
{
if (mol->bonds[i].order == (-1))
{
hbond=TRUE;
break;
}
}
done=(int *)getmem(mol->na, sizeof(int));
for (i=0; i<mol->na; i++)
{
if (!done[i])
{
element=mol->atoms[i].element;
fprintf(file, "surface %s\n", element->symbol);
fprintf(file, " diffuse %5.3f %5.3f %5.3f\n",
(element->dark[0]+element->light[0])*0.5,
(element->dark[1]+element->light[1])*0.5,
(element->dark[2]+element->light[2])*0.5);
/* Use only 1/10 of the ambient color since rayshade looses contrast
otherwise */
fprintf(file, " ambient %5.3f %5.3f %5.3f\n", 0.1*element->ambient[0],
0.1*element->ambient[1], 0.1*element->ambient[2]);
fprintf(file, " specular %5.3f %5.3f %5.3f\n", element->specular[0],
element->specular[1], element->specular[2]);
fprintf(file, " specpow %7.3f\n", element->shininess);
fprintf(file, " transp %7.3f\n", 1.0-element->alpha);
for (j=i; j<mol->na; j++)
{
if (mol->atoms[j].element == element) done[j]=TRUE;
}
}
}
if (hbond)
{
element=mol->bondStyle;
fprintf(file, "surface %s\n", element->symbol);
fprintf(file, " diffuse %5.3f %5.3f %5.3f\n",
(element->dark[0]+element->light[0])*0.5,
(element->dark[1]+element->light[1])*0.5,
(element->dark[2]+element->light[2])*0.5);
fprintf(file, " ambient %5.3f %5.3f %5.3f\n", 0.1*element->ambient[0],
0.1*element->ambient[1], 0.1*element->ambient[2]);
fprintf(file, " specular %5.3f %5.3f %5.3f\n", element->specular[0],
element->specular[1], element->specular[2]);
fprintf(file, " specpow %7.3f\n", element->shininess);
fprintf(file, " transp %7.3f\n", 1.0-element->alpha);
}
if (iwavef != ALL_OFF)
{
for (i=0; i<ne; i++)
{
if (!strcmp(elements[i].symbol, "Ps") || !strcmp(elements[i].symbol, "Ms"))
{
fprintf(file, "surface %s\n", elements[i].symbol);
fprintf(file, " diffuse %5.3f %5.3f %5.3f\n",
(elements[i].dark[0]+elements[i].light[0])*0.5,
(elements[i].dark[1]+elements[i].light[1])*0.5,
(elements[i].dark[2]+elements[i].light[2])*0.5);
fprintf(file, " ambient %5.3f %5.3f %5.3f\n", 0.1*elements[i].ambient[0],
0.1*elements[i].ambient[1], 0.1*elements[i].ambient[2]);
fprintf(file, " specular %5.3f %5.3f %5.3f\n", elements[i].specular[0],
elements[i].specular[1], elements[i].specular[2]);
fprintf(file, " specpow %7.3f\n", elements[i].shininess);
fprintf(file, " transp %7.3f\n", 1.0-elements[i].alpha);
}
}
}
fremem((void **)&done);
if (projectionMode == PERSPECTIVE)
{
fprintf(file, "surface ground\n");
fprintf(file, " diffuse %5.3f %5.3f %5.3f\n", windows[VIEWER].foreground_rgb[0],
windows[VIEWER].foreground_rgb[1], windows[VIEWER].foreground_rgb[2]);
fprintf(file, " ambient %5.3f %5.3f %5.3f\n", 0.5*windows[VIEWER].foreground_rgb[0],
0.5*windows[VIEWER].foreground_rgb[1], 0.5*windows[VIEWER].foreground_rgb[2]);
fprintf(file, "plane ground 0.0 %10.5f 0.0 0.0 1.0 0.0\n", windows[VIEWER].bottom);
}
fprintf(file, "name molecule list\n");
f=file;
return(file);
}
void raytraceClose(FILE *file)
{
fprintf(file, "end\n");
fprintf(file, "object molecule\n");
fclose(file);
}
void raytracerBegin(GLenum what)
{
fprintf(f, "triangle %s ", material->symbol);
glGetDoublev(GL_MODELVIEW_MATRIX, &tmat[0][0]);
}
void raytracerEnd()
{
fprintf(f, "\n");
}
void raytracerVertex3d(double vx, double vy, double vz)
{
double t[3];
t[0]=vx*tmat[0][0]+vy*tmat[1][0]+vz*tmat[2][0]+tmat[3][0];
t[1]=vx*tmat[0][1]+vy*tmat[1][1]+vz*tmat[2][1]+tmat[3][1];
t[2]=vx*tmat[0][2]+vy*tmat[1][2]+vz*tmat[2][2]+tmat[3][2];
fprintf(f, "%10.6f %10.6f %10.6f ", t[0], t[1], t[2]);
if (printNormal)
{
t[0]=n[0]*tmat[0][0]+n[1]*tmat[1][0]+n[2]*tmat[2][0]+tmat[3][0];
t[1]=n[0]*tmat[0][1]+n[1]*tmat[1][1]+n[2]*tmat[2][1]+tmat[3][1];
t[2]=n[0]*tmat[0][2]+n[1]*tmat[1][2]+n[2]*tmat[2][2]+tmat[3][2];
fprintf(f, "%10.6f %10.6f %10.6f ", t[0], t[1], t[2]);
printNormal=FALSE;
}
}
void raytracerNormal3d(double vx, double vy, double vz)
{
n[0]=vx;
n[1]=vy;
n[2]=vz;
printNormal=TRUE;
}
void raytracerSphere(GLUquadricObj *object, GLdouble radius, GLint dummy1,
GLint dummy2)
{
double matrix[4][4];
glGetDoublev(GL_MODELVIEW_MATRIX, &matrix[0][0]);
fprintf(f, "sphere %s %f %10.6f %10.6f %10.6f\n", material->symbol, radius,
matrix[3][0], matrix[3][1], matrix[3][2]);
}
void raytracerCylinder(GLUquadricObj *object, GLdouble top, GLdouble bottom,
GLdouble height, GLint dummy1, GLint dummy2)
{
double matrix[4][4];
glGetDoublev(GL_MODELVIEW_MATRIX, &matrix[0][0]);
fprintf(f, "cylinder %s %f %10.6f %10.6f %10.6f %10.6f %10.6f %10.6f\n",
material->symbol, bottom, matrix[3][0], matrix[3][1], matrix[3][2],
height*matrix[2][0]+matrix[3][0], height*matrix[2][1]+matrix[3][1],
height*matrix[2][2]+matrix[3][2]);
}
void raytracerColor4fv(const GLfloat *color)
{
}
void raytracerClearColor(GLclampf red, GLclampf green , GLclampf blue, GLclampf alpha)
{
}
void raytracerMaterial(struct ELEMENT *e)
{
material=e;
}
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