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#include <stdlib.h>
#include <GL/glut.h> //the GLUT graphics library
#include <rfftw.h> //the numerical simulation FFTW library
#include "fluids.h"
#include "palette.h"
#include "colormap.h"
#define FALSE 0
#define TRUE !FALSE
void do_one_simulation_step(void)
{
if (!frozen)
{
calculate_one_simulation_step();
glutPostRedisplay();
}
}
//reshape: Handle window resizing (reshaping) events
void reshape(int w, int h)
{
glViewport(0.0f, 0.0f, (GLfloat)w, (GLfloat)h);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
gluPerspective(45.0f, (GLfloat)w / (GLfloat)h, 0.1, 5000.0f);
//glOrtho(0.0, (GLdouble)w, 0.0, (GLdouble)h, -100, 100);
//glFrustum(-1.0, 1.0, -1.0, 1.0, 0.1, 1000.0);
winWidth = w; winHeight = h;
}
//display: Handle window redrawing events. Simply delegates to visualize().
void display(void)
{
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
visualize();
glFlush();
glutSwapBuffers();
}
void setup_menu(void) {
int submenu_color, submenu_oliverscolor, submenu_clamp, submenu_scale, submenu_glyphs, submenu_glyphs_usage, submenu_glyphs_scalar,submenu_glyphs_vector;
submenu_color = glutCreateMenu(selectColor);
glutAddMenuEntry("Greyscale", COLOR_BLACKWHITE);
glutAddMenuEntry("Rainbow", COLOR_RAINBOW);
glutAddMenuEntry("Band", COLOR_BANDS);
glutAddMenuEntry("Wilrik", COLOR_WILRIK);
glutAddMenuEntry("Oliver", COLOR_OLIVER);
submenu_glyphs_usage = glutCreateMenu(toggle_glyph_usage);
glutAddMenuEntry("Glyphs", NULL);
submenu_glyphs_scalar = glutCreateMenu(set_glyph_scalar);
glutAddMenuEntry("Density", SCALAR_RHO);
glutAddMenuEntry("Velocity", SCALAR_VEL);
glutAddMenuEntry("Force", SCALAR_FORCE);
submenu_glyphs_vector = glutCreateMenu(set_glyph_vector);
glutAddMenuEntry("Velocity", VECTOR_VEL);
glutAddMenuEntry("Force", VECTOR_FORCE);
submenu_glyphs = glutCreateMenu(NULL);
glutAddSubMenu("Use glyphs", submenu_glyphs_usage);
glutAddSubMenu("Choose scalar field", submenu_glyphs_scalar);
glutAddSubMenu("Choose vector field", submenu_glyphs_vector);
submenu_oliverscolor = glutCreateMenu(colormap_set_num_colors);
glutAddMenuEntry("0", 0);
glutAddMenuEntry("1", 1);
glutAddMenuEntry("2", 2);
glutAddMenuEntry("4", 4);
glutAddMenuEntry("8", 8);
glutAddMenuEntry("16", 16);
glutAddMenuEntry("32", 32);
glutAddMenuEntry("256", 256);
submenu_clamp = glutCreateMenu(select_dataset);
glutAddMenuEntry("Rho", DATASET_RHO);
glutAddMenuEntry("Vel", DATASET_VEL);
glutAddMenuEntry("Force", DATASET_FORCE);
glutAddMenuEntry("Velocity divergence", DATASET_DIVV);
glutAddMenuEntry("Force divergence", DATASET_DIVF);
submenu_scale = glutCreateMenu(toggle_autoscale);
glutAddMenuEntry("Autoscale", NULL);
glutCreateMenu(NULL);
glutAddSubMenu("Colormap", submenu_color);
glutAddSubMenu("Select Color", submenu_oliverscolor);
glutAddSubMenu("Dataset", submenu_clamp);
glutAddSubMenu("Autoscaling", submenu_scale);
glutAddSubMenu("Glyphs", submenu_glyphs);
glutAttachMenu(GLUT_RIGHT_BUTTON);
}
//keyboard: Handle key presses
void keyboard(unsigned char key, int x, int y)
{
switch (key)
{
case 't': dt -= 0.001; break;
case 'T': dt += 0.001; break;
case 'c': color_dir = (color_dir +1) %3; break;
case 'S': vec_scale *= 1.2f; break;
case 's': vec_scale *= 0.8f; break;
case 'V': visc *= 5.0f; break;
case 'v': visc *= 0.2f; break;
case 'y': toggle_glyph_usage(); break;
case 'x': toggle_smoke_usage(); break;
case 'm': scalar_col++; if (scalar_col>COLOR_OLIVER) scalar_col=COLOR_BLACKWHITE; break;
case 'a': frozen = 1-frozen; break;
case 'q': exit(0); break;
case 'r': toggle_mouse_rotate(); break;
case 'e': toggle_seed_insert(); break;
default: break;
}
}
//main: The main program
int main(int argc, char **argv)
{
printf("Fluid Flow Simulation and Visualization\n");
printf("=======================================\n");
printf("Click and drag the mouse to steer the flow!\n");
printf("T/t: increase/decrease simulation timestep\n");
printf("S/s: increase/decrease hedgehog scaling\n");
printf("c: toggle direction coloring on/off\n");
printf("V/vy: increase decrease fluid viscosity\n");
printf("x: toggle drawing matter on/off\n");
printf("y: toggle drawing hedgehogs on/off\n");
printf("m: toggle thru scalar coloring\n");
printf("a: toggle the animation on/off\n");
printf("q: quit\n\n");
glutInit(&argc, argv);
glutInitDisplayMode(GLUT_RGBA | GLUT_DOUBLE | GLUT_DEPTH);
glutInitWindowSize(600, 600);
glutCreateWindow("Real-time smoke simulation and visualization");
glutDisplayFunc(display);
glutReshapeFunc(reshape);
glutIdleFunc(do_one_simulation_step);
glutKeyboardFunc(keyboard);
glutMotionFunc(drag);
glutMouseFunc(click);
setup_menu();
init_simulation(DIM); //initialize the simulation data structures
glutMainLoop(); //calls do_one_simulation_step, keyboard, display, drag, reshape
return 0;
}
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