Created
April 21, 2013 19:49
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Representación solar:
En este proyecto se quiere representar el comportamiento de la parte externa del sol, tema que ha sido previamente investigado por medio del proyecto. Este proyecto fue realizado mediante el uso de programación en c++ con ayuda de la librería opengl.
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//creadores gerardo tibamoso pedraza, carolina pardo y leonel felipe morales avella. | |
#include <math.h> | |
#include <GL/glut.h> | |
#include <iostream> | |
using namespace std; | |
#define PI 3.1415 | |
int day, year; | |
float puntos[100][100][3]; | |
float ptosElipses[100][100][3]; | |
float dx=0.0; | |
float theta, alpha; | |
float c,d; | |
GLfloat mat_ambient[]= { 0.0, 0.0, 0.0, 1.0 }; | |
void elipses(float r, int lat, int lon ) | |
{ | |
int k=0, latCir; | |
float dx, rCir; | |
dx=r/2.0; | |
theta=PI/lon; | |
latCir=lat/4; | |
rCir=r/latCir; | |
for(int i=0; i<=lat; i++){ | |
for(int j=0; j<=lon; j++){ | |
if(i==0){ | |
ptosElipses[i][j][0]=0.0; | |
ptosElipses[i][j][1]=0.0; | |
} | |
else if(i<latCir){ | |
ptosElipses[i][j][0]=(rCir*i)*cos(theta*j-PI/2); | |
ptosElipses[i][j][1]=(rCir*i)*sin(theta*j-PI/2); | |
}else{ | |
ptosElipses[i][j][0]=(r+dx*(i-latCir))*cos(theta*j-PI/2); | |
ptosElipses[i][j][1]=r*sin(theta*j-PI/2); | |
} | |
} | |
} | |
// glColor3f(((float)i/(float)lat+(float)j/(float)lon)/2, | |
// ((float)i/(float)lat+(float)j/(float)lon)/2, | |
// ((float)i/(float)lat+(float)j/(float)lon)/2); | |
for(int i=0; i<lat; i++){ | |
glColor3f(1-(float)i/(float)lat, | |
1-(float)i/(float)lat, | |
0.0); | |
for(int j=0; j<lon; j++){ | |
glBegin(GL_QUADS); | |
glVertex3f(ptosElipses[i][j][0],ptosElipses[i][j][1],ptosElipses[i][j][2]); | |
glVertex3f(ptosElipses[i+1][j][0],ptosElipses[i+1][j][1],ptosElipses[i+1][j][2]); | |
glVertex3f(ptosElipses[i+1][j+1][0],ptosElipses[i+1][j+1][1],ptosElipses[i+1][j+1][2]); | |
glVertex3f(ptosElipses[i][j+1][0],ptosElipses[i][j+1][1],ptosElipses[i][j+1][2]); | |
glEnd(); | |
} | |
} | |
for(int i=0; i<=latCir; i++){ | |
for(int j=0; j<=lon; j++){ | |
if(i==0){ | |
ptosElipses[i][j][0]=0.0; | |
ptosElipses[i][j][1]=0.0; | |
} | |
else{ | |
ptosElipses[i][j][0]=(rCir*i)*cos(theta*j+PI/2); | |
ptosElipses[i][j][1]=(rCir*i)*sin(theta*j+PI/2); | |
} | |
} | |
} | |
for(int i=0; i<latCir; i++){ | |
glColor3f(1-(float)i/(float)lat, | |
1-(float)i/(float)lat, | |
0.0); | |
for(int j=0; j<lon; j++){ | |
glBegin(GL_QUADS); | |
glVertex3f(ptosElipses[i][j][0],ptosElipses[i][j][1],ptosElipses[i][j][2]); | |
glVertex3f(ptosElipses[i+1][j][0],ptosElipses[i+1][j][1],ptosElipses[i+1][j][2]); | |
glVertex3f(ptosElipses[i+1][j+1][0],ptosElipses[i+1][j+1][1],ptosElipses[i+1][j+1][2]); | |
glVertex3f(ptosElipses[i][j+1][0],ptosElipses[i][j+1][1],ptosElipses[i][j+1][2]); | |
glEnd(); | |
} | |
} | |
return; | |
} | |
void esfera(float r, int lat, int lon) | |
{ | |
theta = PI/lat; | |
alpha = 2*PI/lon; | |
for(int i=0; i<=lat; i++){ | |
for(int j=0; j<=lon; j++){ | |
puntos[i][j][0]=r*cos(theta*i+PI/2)*cos(alpha*j); | |
puntos[i][j][1]=r*sin(theta*i+PI/2); | |
puntos[i][j][2]=-r*cos(theta*i+PI/2)*sin(alpha*j); | |
} | |
} | |
for(int i=0; i<lat; i++){ | |
for(int j=0; j<lon; j++){ | |
/* glColor3f(((float)i/(float)lat+(float)j/(float)lon)/2, | |
((float)i/(float)lat+(float)j/(float)lon)/2, | |
((float)i/(float)lat+(float)j/(float)lon)/2);*/ | |
glBegin(GL_QUADS); | |
/*glColor3f(1,0,0);*/ | |
c = fabs(2.f*i/lat); | |
d = fabs(1.3f*(j-lon/2)/lon); | |
glColor3f(c, d, 0.0); | |
//glColor3f(((float)i/(float)lat+(float)j/(float)lon),0.6,0.6); | |
glVertex3f(puntos[i][j][0],puntos[i][j][1],puntos[i][j][2]); | |
glVertex3f(puntos[i+1][j][0],puntos[i+1][j][1],puntos[i+1][j][2]); | |
glVertex3f(puntos[i+1][j+1][0],puntos[i+1][j+1][1],puntos[i+1][j+1][2]); | |
glVertex3f(puntos[i][j+1][0],puntos[i][j+1][1],puntos[i][j+1][2]); | |
glEnd(); | |
} | |
} | |
return; | |
} | |
void display(void) | |
{ | |
float ang, angGrad; | |
int numArc=10; | |
ang=2*PI/numArc; | |
angGrad=ang*180/PI; | |
glClear (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); | |
glPushMatrix(); | |
glRotatef ((GLfloat) year, 0.0, 1.0, 0.0); | |
//glOrtho(1.0, -1.0, 1.0, -1.0, 1.0, -1.0); | |
esfera(1.0, 20, 20); | |
// en este ciclo se generan las elipses de mayor tamaño alrededor de la esfera | |
for(int i=0; i<numArc; i++){ | |
glPushMatrix(); | |
glRotatef(angGrad*i,0,0,1); | |
glTranslatef(1.0, 0.0, 0.0); | |
elipses(0.2, 10, 20); | |
glPopMatrix(); | |
} | |
// en este ciclo se generan las elipses de menor tamaño alrededor de la esfera | |
for(int i=0; i<numArc; i++){ | |
glPushMatrix(); | |
glRotatef(angGrad*i+(angGrad/2),0,0,1); | |
glTranslatef(1.0, 0.0, 0.0); | |
elipses(0.1, 10, 20); | |
glPopMatrix(); | |
} | |
glPopMatrix(); | |
glRotatef(90,1,0,0); | |
glutWireSphere(1.9,50,50); | |
glutSwapBuffers(); | |
} | |
void keyboard (unsigned char key, int x, int y) | |
{ | |
switch (key) { | |
case 'x': | |
exit(0); | |
break; | |
default: | |
break; | |
} | |
} | |
void init(void) | |
{ | |
glClearColor (0.0, 0.0, 0.0, 0.0); | |
glMatrixMode (GL_PROJECTION); | |
glLoadIdentity (); | |
//glOrtho(1.0, -1.0, 1.0, -1.0, 1.0, -1.0); | |
gluPerspective(60.0, 1.0, 1.0, 20.0); | |
glMatrixMode(GL_MODELVIEW); | |
glLoadIdentity(); | |
gluLookAt (0.0, 0.0, 5.0, 0.0, 0.0, 0.0, 0.0, 1.0, 0.0); | |
glClearColor (0.0, 0.0, 0.0, 0.0); | |
glEnable(GL_DEPTH_TEST); | |
} | |
int main(int argc, char** argv) | |
{ | |
glutInit(&argc, argv); | |
glutInitDisplayMode (GLUT_DOUBLE | GLUT_RGB | GLUT_DEPTH); | |
glutInitWindowSize (500, 500); | |
glutInitWindowPosition (100, 100); | |
glutCreateWindow (argv[0]); | |
init (); | |
glutDisplayFunc(display); | |
//glutReshapeFunc(reshape); | |
glutKeyboardFunc(keyboard); | |
glutMainLoop(); | |
return 0; | |
} |
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