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#include <stdlib.h>
#include <string>
#include <fstream>
#include <algorithm>
// CUDA include
#ifdef __CUDACC__
#include "device_launch_parameters.h"
#include <cuda.h>
#include <cuda_runtime_api.h>
#include "cuda_runtime.h"
#endif
// OPENGL include
#include <GL/glut.h>
#include <GL/freeglut.h>
#include "flow.h"
// STIM include
#include <stim/visualization/gl_aaboundingbox.h>
#include <stim/parser/arguments.h>
#include <stim/visualization/camera.h>
#include <stim/visualization/colormap.h>
#include <stim/cuda/cudatools/error.h>
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#include <stim/grids/image_stack.h>
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//********************parameter setting********************
// overall parameters
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std::string units; // units used in this program
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int vX, vY;
float dx, dy, dz; // x, y and z image scaling(units/pixel)
std::string stackdir = ""; // directory where image stacks will be stored
stim::arglist args; // create an instance of arglist
stim::gl_aaboundingbox<float> bb; // axis-aligned bounding box object
stim::camera cam; // camera object
unsigned num_edge; // number of edges in the network
unsigned num_vertex; // number of vertex in the network
std::vector<unsigned> pendant_vertex; // list of pendant vertex index in GT
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std::vector<std::string> menu_option = { "simulation", "build inlet/outlet", "manufacture", "adjustment" };
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stim::flow<float> flow; // flow object
float move_pace; // camera moving parameter
float u; // viscosity
float rou; // density
float max_v;
float min_v;
int mods; // special keyboard input
std::vector<unsigned char> color; // velocity color map
std::vector<int> velocity_bar; // velocity bar
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float length = 40.0f; // cuboid length
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float scale = 1.0f; // scale factor
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bool image_stack = false; // flag indicates an image stack been loaded
stim::image_stack<unsigned char, float> S; // image stack
float binary_threshold = 128; // threshold for binary transformation
float in = 0.0f; // total input volume flow rate
float out = 0.0f;
float Rt = 0.0f; // total resistance
float Qn = 0.0f; // required input total volume flow rate
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GLint dlist; // simulation display list
bool undo = false; // delete display list
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// hard-coded parameters
float camera_factor = 1.2f; // start point of the camera as a function of X and Y size
float orbit_factor = 0.01f; // degrees per pixel used to orbit the camera
float zoom_factor = 10.0f; // zooming factor
float border_factor = 20.0f; // border
float radii_factor = 1.0f; // radii changing factor
GLint subdivision = 20; // slices and stacks
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float default_radius = 5.0f; // default radii of network vertex
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float delta = 0.01f; // small discrepancy
float eps = 20.0f; // epsilon threshold
float max_pressure = 0.0f; // maximum pressure that the channel can bear
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float height_threshold = 100.0f; // connection height constraint
float fragment_ratio = 0.0f; // fragment ratio
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// glut event parameters
int mouse_x; // window x-coordinate
int mouse_y; // window y-coordinate
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int picked_x; // picked window x-coordinate
int picked_y; // picked window y-coordinate
bool LTbutton = false; // true means down while false means up
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// simulation parameters
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bool render_direction = false; // flag indicates rendering flow direction for one edge
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bool simulation = false; // flag indicates simulation mode
bool color_bound = false; // flag indicates velocity color map bound
bool to_select_pressure = false; // flag indicates having selected a vertex to modify pressure
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bool mark_index = true; // flag indicates marking the index near the vertex
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bool glyph_mode = false; // flag indicates rendering glyph for flow velocity field
bool frame_mode = false; // flag indicates rendering filament framing structrues
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unsigned pressure_index; // the index of vertex that is clicked
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unsigned direction_index = UINT_MAX;// the index of edge that is pointed at
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// build inlet/outlet parameters
bool build_inlet_outlet = false; // flag indicates building inlets and outlets
bool modified_bridge = false; // flag indicates having modified inlet/outlet connection
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bool hilbert_curve = false; // flag indicates enabling hilbert curves constructions
bool change_fragment = false; // flag indicates changing fragment for square wave connections
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bool picked_connection = false; // flag indicates picked one connection
bool render_new_connection = false; // flag indicates rendering new line connection in trasparency
bool redisplay = false; // flag indicates redisplay rendering
bool connection_done = false; // flag indicates finishing connections
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bool render_flow_rate = false; // flag indicates rendering total volume flow rate
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unsigned connection_index = UINT_MAX;// the index of connection that is picked
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unsigned port_index = 0; // inlet (0) or outlet (1)
stim::vec3<float> tmp_v1, tmp_v2; // temp vertex
int coef; // computational coefficient factor
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// manufacture parameters
bool manufacture = false; // flag indicates manufacture mode
//********************helper function*********************
// get the network basic information
inline void get_background() {
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pendant_vertex = flow.get_pendant_vertex();
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num_edge = flow.edges();
num_vertex = flow.vertices();
// set the initial radii
flow.init(num_edge, num_vertex); // initialize flow object
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// if no radius information laoded
if (!flow.get_radius(0, 0))
for (unsigned i = 0; i < num_edge; i++)
flow.set_r(i, default_radius);
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}
// convert from window coordinates to world coordinates
inline void window_to_world(GLdouble &x, GLdouble &y, GLdouble &z) {
GLint viewport[4];
GLdouble modelview[16];
GLdouble projection[16];
GLdouble winX, winY;
GLfloat winZ;
glGetIntegerv(GL_VIEWPORT, viewport);
glGetDoublev(GL_MODELVIEW_MATRIX, modelview);
glGetDoublev(GL_PROJECTION_MATRIX, projection);
winX = (GLdouble)mouse_x;
winY = viewport[3] - (GLdouble)mouse_y;
glReadPixels((GLint)winX, (GLint)winY, (GLsizei)1, (GLsizei)1, GL_DEPTH_COMPONENT, GL_FLOAT, &winZ);
gluUnProject(winX, winY, winZ, modelview, projection, viewport, &x, &y, &z);
}
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// convert current image stack into a binary mask
#ifdef __CUDACC__
template <typename T, typename F>
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__global__ void binary_transform(size_t N, T* ptr, F threshold) {
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size_t ix = blockDim.x * blockIdx.x + threadIdx.x;
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if (ix >= N) return; // avoid seg-fault
if (ptr[ix] >= threshold) // binary transformation
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ptr[ix] = 0;
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else
ptr[ix] = 255;
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}
#endif
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//********************simulation function**********************
// initialize flow object
void flow_initialize() {
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flow.set = true;
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stim::vec3<float> center = bb.center();
for (unsigned i = 0; i < pendant_vertex.size(); i++) {
if (flow.get_vertex(pendant_vertex[i])[0] <= center[0])
flow.P[pendant_vertex[i]] = max_pressure - i * delta; // should set minor discrepancy
else
flow.P[pendant_vertex[i]] = (i + 1) * delta; // algorithm treat 0 as no initial pressure
}
}
// find the stable flow state
void flow_stable_state() {
flow.solve_flow(u);
flow.get_color_map(max_v, min_v, color, pendant_vertex);
color_bound = true;
velocity_bar.resize(num_edge);
for (unsigned i = 0; i < num_edge; i++)
velocity_bar[i] = i;
std::sort(velocity_bar.begin(), velocity_bar.end(), [&](int x, int y) {return abs(flow.v[x]) < abs(flow.v[y]); });
}
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// adjustment on input volume flow rate and corresponding flow simulation
void adjustment() {
system("CLS"); // clear up console box
std::cout << "Please enter the input total volume flow rate: " << std::endl;
std::cin >> Qn;
flow.adjust(in, out, Rt, Qn, u);
}
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//********************glut function********************
// dynamically set menu
// @param num: number of current menu options
// @param range: range of option to be set from menu_option list
void glut_set_menu(int num, int range) {
// remove last time menu options
for (int i = 1; i < num + 1; i++)
glutRemoveMenuItem(1);
// set new menu options
std::string menu_name;
for (int i = 1; i < range + 1; i++) {
menu_name = menu_option[i - 1];
glutAddMenuEntry(menu_name.c_str(), i);
}
}
// set up the squash transform to whole screen
void glut_projection() {
glMatrixMode(GL_PROJECTION); // load the projection matrix for editing
glLoadIdentity(); // start with the identity matrix
vX = glutGet(GLUT_WINDOW_WIDTH); // use the whole screen for rendering
vY = glutGet(GLUT_WINDOW_HEIGHT);
glViewport(0, 0, vX, vY); // specify a viewport for the entire window
float aspect = (float)vX / (float)vY; // calculate the aspect ratio
gluPerspective(60, aspect, 0.1, 1000000); // set up a perspective projection
}
// translate camera to origin
void glut_modelview() {
glMatrixMode(GL_MODELVIEW); // load the modelview matrix for editing
glLoadIdentity(); // start with the identity matrix
stim::vec3<float> eye = cam.getPosition(); // get the camera position (eye point)
stim::vec3<float> focus = cam.getLookAt(); // get the camera focal point
stim::vec3<float> up = cam.getUp(); // get the camera "up" orientation
gluLookAt(eye[0], eye[1], eye[2], focus[0], focus[1], focus[2], up[0], up[1], up[2]); // set up the OpenGL camera
}
// glut render function
void glut_render() {
glEnable(GL_DEPTH_TEST);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
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glClearColor(1.0f, 1.0f, 1.0f, 1.0f);
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glut_projection();
glut_modelview();
if (!simulation && !build_inlet_outlet || manufacture) {
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glColor3f(0.0f, 0.0f, 0.0f);
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flow.glCylinder0(scale, undo);
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}
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else {
flow.bounding_box(); // bounding box
if (num_vertex > 100) { // if the network is big enough (say 100), use display list
if (undo) { // undo rendering list
undo = false;
glDeleteLists(dlist, 1);
}
if (!glIsList(dlist)) {
dlist = glGenLists(1);
glNewList(dlist, GL_COMPILE);
// render network
if (!glyph_mode) {
flow.glSolidSphere(max_pressure, subdivision, scale);
if (mark_index)
flow.mark_vertex(scale);
//flow.glSolidCone(subdivision);
flow.glSolidCylinder(direction_index, color, subdivision, scale);
}
// render glyphs
else
flow.glyph(color, subdivision, scale, frame_mode);
glEndList();
}
glCallList(dlist);
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}
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else { // small network
// render network
if (!glyph_mode) {
flow.glSolidSphere(max_pressure, subdivision, scale);
if (mark_index) {
flow.mark_vertex(scale);
//flow.mark_edge();
}
//flow.glSolidCone(subdivision);
flow.glSolidCylinder(direction_index, color, subdivision, scale);
}
// render glyphs
else
flow.glyph(color, subdivision, scale, frame_mode);
}
flow.glSolidCuboid(subdivision, manufacture, length); // render bus source
if (render_direction) // render the flow direction of the vertex pointed
flow.glSolidCone(direction_index, subdivision, scale);
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}
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if (build_inlet_outlet)
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flow.line_bridge(redisplay);
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if (manufacture) {
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flow.glSolidCuboid(subdivision, manufacture, length);
flow.tube_bridge(redisplay, subdivision, scale);
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}
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if (picked_connection && render_new_connection) {
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glColor4f(0.0f, 0.0f, 0.0f, 0.4f);
glBegin(GL_LINE_STRIP);
if (!port_index) {
glVertex3f(flow.inlet[connection_index].V[1][0], flow.inlet[connection_index].V[1][1], flow.inlet[connection_index].V[1][2]);
glVertex3f(tmp_v1[0], tmp_v1[1], tmp_v1[2]);
glVertex3f(tmp_v2[0], tmp_v2[1], tmp_v2[2]);
glVertex3f(flow.inlet[connection_index].V[2][0], flow.inlet[connection_index].V[2][1], flow.inlet[connection_index].V[2][2]);
}
else {
glVertex3f(flow.outlet[connection_index].V[1][0], flow.outlet[connection_index].V[1][1], flow.outlet[connection_index].V[1][2]);
glVertex3f(tmp_v1[0], tmp_v1[1], tmp_v1[2]);
glVertex3f(tmp_v2[0], tmp_v2[1], tmp_v2[2]);
glVertex3f(flow.outlet[connection_index].V[2][0], flow.outlet[connection_index].V[2][1], flow.outlet[connection_index].V[2][2]);
}
glEnd();
glFlush();
glDisable(GL_BLEND);
}
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// render bars
// bring up a pressure bar on left
if (to_select_pressure) {
glMatrixMode(GL_PROJECTION); // set up the 2d viewport for mode text printing
glPushMatrix();
glLoadIdentity();
vX = glutGet(GLUT_WINDOW_WIDTH); // get the current window width
vY = glutGet(GLUT_WINDOW_HEIGHT); // get the current window height
glViewport(0, 0, vX, vY); // locate to left bottom corner
gluOrtho2D(0, vX, 0, vY); // define othogonal aspect
glMatrixMode(GL_MODELVIEW);
glPushMatrix();
glLoadIdentity();
glLineWidth(border_factor);
glBegin(GL_LINES);
glColor3f(0.0, 0.0, 1.0); // blue to red
glVertex2f(border_factor, border_factor);
glColor3f(1.0, 0.0, 0.0);
glVertex2f(border_factor, (vY - 2.0f * border_factor));
glEnd();
glFlush();
// pressure bar text
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glColor3f(0.0f, 0.0f, 0.0f);
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glRasterPos2f(0.0f, vY - border_factor);
std::stringstream ss_p;
ss_p << "Pressure Bar";
glutBitmapString(GLUT_BITMAP_HELVETICA_18, (const unsigned char*)(ss_p.str().c_str()));
// pressure range text
float step = vY - 3.0f * border_factor;
step /= 10;
for (unsigned i = 0; i < 11; i++) {
glRasterPos2f((border_factor * 1.5f), (border_factor + i * step));
std::stringstream ss_n;
ss_n << (float)i * max_pressure / 10;
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glutBitmapString(GLUT_BITMAP_HELVETICA_18, (const unsigned char*)(ss_n.str().c_str()));
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}
glPopMatrix();
glMatrixMode(GL_PROJECTION);
glPopMatrix();
}
// bring up a velocity bar on left
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if ((simulation || build_inlet_outlet) && !to_select_pressure && !change_fragment) {
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glMatrixMode(GL_PROJECTION); // set up the 2d viewport for mode text printing
glPushMatrix();
glLoadIdentity();
vX = glutGet(GLUT_WINDOW_WIDTH); // get the current window width
vY = glutGet(GLUT_WINDOW_HEIGHT); // get the current window height
glViewport(0, 0, vX, vY); // locate to left bottom corner
gluOrtho2D(0, vX, 0, vY); // define othogonal aspect
glMatrixMode(GL_MODELVIEW);
glPushMatrix();
glLoadIdentity();
float step = (vY - 3 * border_factor);
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step /= BREWER_CTRL_PTS - 1;
for (unsigned i = 0; i < BREWER_CTRL_PTS - 1; i++) {
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glLineWidth(border_factor);
glBegin(GL_LINES);
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glColor3f(BREWERCP[i * 4 + 0], BREWERCP[i * 4 + 1], BREWERCP[i * 4 + 2]);
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glVertex2f(border_factor, border_factor + i * step);
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glColor3f(BREWERCP[(i + 1) * 4 + 0], BREWERCP[(i + 1) * 4 + 1], BREWERCP[(i + 1) * 4 + 2]);
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glVertex2f(border_factor, border_factor + (i + 1) * step);
glEnd();
}
glFlush();
// pressure bar text
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glColor3f(0.0f, 0.0f, 0.0f);
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glRasterPos2f(0.0f, vY - border_factor);
std::stringstream ss_p;
ss_p << "Velocity range";
glutBitmapString(GLUT_BITMAP_HELVETICA_18, (const unsigned char*)(ss_p.str().c_str()));
// pressure range text
step = vY - 3 * border_factor;
step /= 10;
for (unsigned i = 0; i < 11; i++) {
glRasterPos2f(border_factor * 1.5f, border_factor + i * step);
std::stringstream ss_n;
ss_n << min_v + i * (max_v - min_v) / 10;
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glutBitmapString(GLUT_BITMAP_HELVETICA_18, (const unsigned char*)(ss_n.str().c_str()));
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}
glPopMatrix();
glMatrixMode(GL_PROJECTION);
glPopMatrix();
}
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// bring up a ratio bar on the left
if (change_fragment) {
glMatrixMode(GL_PROJECTION); // set up the 2d viewport for mode text printing
glPushMatrix();
glLoadIdentity();
vX = glutGet(GLUT_WINDOW_WIDTH); // get the current window width
vY = glutGet(GLUT_WINDOW_HEIGHT); // get the current window height
glViewport(0, 0, vX, vY); // locate to left bottom corner
gluOrtho2D(0, vX, 0, vY); // define othogonal aspect
glMatrixMode(GL_MODELVIEW);
glPushMatrix();
glLoadIdentity();
glLineWidth(border_factor);
glBegin(GL_LINES);
glColor3f(0.0, 0.0, 1.0); // blue to red
glVertex2f(border_factor, border_factor);
glColor3f(1.0, 0.0, 0.0);
glVertex2f(border_factor, (vY - 2.0f * border_factor));
glEnd();
glFlush();
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// ratio bar text
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glColor3f(0.0f, 0.0f, 0.0f);
glRasterPos2f(0.0f, vY - border_factor);
std::stringstream ss_p;
ss_p << "Ratio bar";
glutBitmapString(GLUT_BITMAP_HELVETICA_18, (const unsigned char*)(ss_p.str().c_str()));
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// ratio range text
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float step = vY - 3.0f * border_factor;
step /= 10;
for (unsigned i = 0; i < 11; i++) {
glRasterPos2f((border_factor * 1.5f), (border_factor + i * step));
std::stringstream ss_n;
ss_n << (float)i * 1.0f / 10;
glutBitmapString(GLUT_BITMAP_HELVETICA_18, (const unsigned char*)(ss_n.str().c_str()));
}
glPopMatrix();
glMatrixMode(GL_PROJECTION);
glPopMatrix();
}
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if (build_inlet_outlet)
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if (render_flow_rate)
flow.display_flow_rate(in, out);
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glutSwapBuffers();
}
// register glut menu options
void glut_menu(int value) {
int num = glutGet(GLUT_MENU_NUM_ITEMS);
if (value == 1) {
simulation = true;
build_inlet_outlet = false;
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render_flow_rate = false;
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manufacture = false;
modified_bridge = false;
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change_fragment = false;
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connection_done = false;
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// first time
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if (!flow.set) { // only first time simulation called "simulation", ^_^
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get_background(); // get the graph information
flow_initialize(); // initialize flow condition
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menu_option[0] = "resimulation";
}
// simulation / resimulation
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flow_stable_state(); // main function of solving the linear system
flow.print_flow();
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if (!glyph_mode)
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glut_set_menu(num, 2);
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}
if (value == 2) {
simulation = false;
build_inlet_outlet = true;
manufacture = false;
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if (!modified_bridge && !connection_done) {
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flow.set_main_feeder();
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flow.build_synthetic_connection(u, default_radius);
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flow.check_direct_connection(); // check whether direct connections intersect each other
connection_done = true;
}
else if (modified_bridge) {
modified_bridge = false;
redisplay = true;
flow.clear_synthetic_connection();
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}
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glut_set_menu(num, 4);
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}
if (value == 3) {
simulation = false;
build_inlet_outlet = false;
manufacture = true;
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glyph_mode = false; // manufacuture mode doesn't need flow direction
|
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|
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redisplay = true;
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}
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if (value == 4) {
simulation = true;
build_inlet_outlet = false;
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render_flow_rate = false;
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manufacture = false;
adjustment(); // adjust network flow accordingly
glut_set_menu(num, 1);
}
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glutPostRedisplay();
}
// defines camera motion based on mouse dragging
void glut_motion(int x, int y) {
mods = glutGetModifiers();
if (LTbutton && mods == 0) {
float theta = orbit_factor * (mouse_x - x); // determine the number of degrees along the x-axis to rotate
float phi = orbit_factor * (y - mouse_y); // number of degrees along the y-axis to rotate
cam.OrbitFocus(theta, phi); // rotate the camera around the focal point
}
mouse_x = x; // update the mouse position
mouse_y = y;
glutPostRedisplay(); // re-draw the visualization
}
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// defines passive mouse motion function
void glut_passive_motion(int x, int y) {
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mods = glutGetModifiers();
|
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// check whether the mouse point near to an edge
GLdouble posX, posY, posZ;
window_to_world(posX, posY, posZ); // get the world coordinates
|
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if (simulation || build_inlet_outlet && !mods) {
|
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|
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bool flag = flow.epsilon_edge((float)posX, (float)posY, (float)posZ, eps, direction_index);
|
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if (flag && !glyph_mode)
|
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|
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|
render_direction = true;
|
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else if (!flag && !glyph_mode) {
|
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|
582
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if (render_direction) // if the direction is displaying currently, do a short delay
|
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Sleep(300);
|
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render_direction = false;
direction_index = -1;
}
}
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if (mods == GLUT_ACTIVE_SHIFT && picked_connection) {
render_new_connection = true;
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|
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size_t i;
|
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if (!port_index) {
tmp_v1 = stim::vec3<float>(flow.inlet[connection_index].V[1][0], flow.inlet[connection_index].V[1][1] + (float)(picked_y - y), flow.inlet[connection_index].V[1][2]);
tmp_v2 = stim::vec3<float>(flow.inlet[connection_index].V[2][0], flow.inlet[connection_index].V[2][1] + (float)(picked_y - y), flow.inlet[connection_index].V[2][2]);
i = flow.inlet[connection_index].V.size();
if (coef * tmp_v1[1] < coef * flow.inlet[connection_index].V[i - 1][1]) {
tmp_v1[1] = flow.inlet[connection_index].V[i - 1][1];
tmp_v2[1] = flow.inlet[connection_index].V[i - 1][1];
}
}
else {
tmp_v1 = stim::vec3<float>(flow.outlet[connection_index].V[1][0], flow.outlet[connection_index].V[1][1] + (float)(picked_y - y), flow.outlet[connection_index].V[1][2]);
tmp_v2 = stim::vec3<float>(flow.outlet[connection_index].V[2][0], flow.outlet[connection_index].V[2][1] + (float)(picked_y - y), flow.outlet[connection_index].V[2][2]);
i = flow.outlet[connection_index].V.size();
if (coef * tmp_v1[1] < coef * flow.outlet[connection_index].V[i - 1][1]) {
tmp_v1[1] = flow.outlet[connection_index].V[i - 1][1];
tmp_v2[1] = flow.outlet[connection_index].V[i - 1][1];
}
}
}
else if (mods == GLUT_ACTIVE_CTRL && picked_connection) {
render_new_connection = true;
if (!port_index) {
tmp_v1 = stim::vec3<float>(flow.inlet[connection_index].V[0][0] + (float)(x - picked_x), flow.inlet[connection_index].V[0][1], flow.inlet[connection_index].V[0][2]);
tmp_v2 = stim::vec3<float>(flow.inlet[connection_index].V[1][0] + (float)(x - picked_x), flow.inlet[connection_index].V[1][1], flow.inlet[connection_index].V[1][2]);
if (tmp_v1[0] < flow.main_feeder[port_index][0] - length / 2) {
tmp_v1[0] = flow.main_feeder[port_index][0] - length / 2;
tmp_v2[0] = flow.main_feeder[port_index][0] - length / 2;
}
else if (tmp_v1[0] > flow.main_feeder[port_index][0] + length / 2) {
tmp_v1[0] = flow.main_feeder[port_index][0] + length / 2;
tmp_v2[0] = flow.main_feeder[port_index][0] + length / 2;
}
}
else {
tmp_v1 = stim::vec3<float>(flow.outlet[connection_index].V[0][0] + (float)(x - picked_x), flow.outlet[connection_index].V[0][1], flow.outlet[connection_index].V[0][2]);
tmp_v2 = stim::vec3<float>(flow.outlet[connection_index].V[1][0] + (float)(x - picked_x), flow.outlet[connection_index].V[1][1], flow.outlet[connection_index].V[1][2]);
if (tmp_v1[0] > flow.main_feeder[port_index][0] + length / 2) {
tmp_v1[0] = flow.main_feeder[port_index][0] + length / 2;
tmp_v2[0] = flow.main_feeder[port_index][0] + length / 2;
}
else if (tmp_v1[0] < flow.main_feeder[port_index][0] - length / 2) {
tmp_v1[0] = flow.main_feeder[port_index][0] - length / 2;
tmp_v2[0] = flow.main_feeder[port_index][0] - length / 2;
}
}
}
else
render_new_connection = false;
mouse_x = x;
mouse_y = y;
glutPostRedisplay(); // re-draw the visualization
|
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|
645
646
|
}
|
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|
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|
// get click window coordinates
void glut_mouse(int button, int state, int x, int y) {
|
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651
|
mods = glutGetModifiers(); // get special keyboard input
|
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|
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|
mouse_x = x;
mouse_y = y;
|
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|
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if (!mods) {
picked_connection = false;
render_new_connection = false;
}
|
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|
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if (button == GLUT_LEFT_BUTTON && state == GLUT_DOWN)
LTbutton = true;
else if (button == GLUT_LEFT_BUTTON && state == GLUT_UP)
LTbutton = false;
|
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|
663
|
if (button == GLUT_LEFT_BUTTON && state == GLUT_DOWN && !mods && simulation && !to_select_pressure) {
|
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GLdouble posX, posY, posZ;
window_to_world(posX, posY, posZ); // get the world coordinates
|
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Jiaming Guo
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|
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|
bool flag = flow.epsilon_vertex((float)posX, (float)posY, (float)posZ, eps, scale, pressure_index);
|
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|
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if (flag) {
std::vector<unsigned>::iterator it = std::find(pendant_vertex.begin(), pendant_vertex.end(), pressure_index);
if (it != pendant_vertex.end()) // if it is dangle vertex
to_select_pressure = true;
}
}
|
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|
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|
else if (button == GLUT_LEFT_BUTTON && state == GLUT_DOWN && !mods && simulation && to_select_pressure) {
|
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|
675
|
if (y >= 2 * border_factor && y <= vY - border_factor) { // within the pressure bar range
|
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|
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|
to_select_pressure = false;
|
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|
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|
float tmp_pressure = (float)(vY - y - border_factor) / ((float)vY - 3.0f * border_factor) * max_pressure;
|
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|
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|
flow.set_pressure(pressure_index, tmp_pressure);
|
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|
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|
//flow_stable_state(); // main function of solving the linear system
//flow.print_flow();
|
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|
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}
}
|
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|
683
|
else if (button == GLUT_LEFT_BUTTON && state == GLUT_DOWN && !mods && modified_bridge && change_fragment) {
|
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|
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if (y >= 2 * border_factor && y <= vY - border_factor) // within the ratio bar range
fragment_ratio = (float)(vY - y - border_factor) / ((float)vY - 3.0f * border_factor) * 1.0f;
else if (y < 2 * border_factor)
fragment_ratio = 1.0f;
else if (y > vY - border_factor)
fragment_ratio = 0.0f;
change_fragment = false;
|
ce1a6f5e
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|
692
|
render_flow_rate = true;
|
6332d1e7
Jiaming Guo
fixed warnings
|
693
|
flow.modify_synthetic_connection(u, rou, hilbert_curve, height_threshold, in, out, 2, fragment_ratio, default_radius);
|
8334680a
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|
694
|
}
|
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|
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// move connections along y-axis
else if (button == GLUT_LEFT_BUTTON && state == GLUT_DOWN && mods == GLUT_ACTIVE_SHIFT && !modified_bridge && !picked_connection) {
GLdouble posX, posY, posZ;
window_to_world(posX, posY, posZ); // get the world coordinates
bool flag = flow.epsilon_edge((float)posX, (float)posY, (float)posZ, eps, connection_index, port_index);
if (flag) {
picked_connection = true;
picked_x = x;
picked_y = y;
if (!port_index)
if (flow.inlet[connection_index].V[2][1] > flow.main_feeder[port_index][1])
coef = 1;
else
coef = -1;
else
if (flow.outlet[connection_index].V[2][1] > flow.main_feeder[port_index][1])
coef = 1;
else
coef = -1;
}
else
picked_connection = false;
}
else if (button == GLUT_LEFT_BUTTON && state == GLUT_DOWN && mods == GLUT_ACTIVE_SHIFT && !modified_bridge && render_new_connection) {
float l = 0.0f;
std::vector<typename stim::vec3<float> > V;
|
6332d1e7
Jiaming Guo
fixed warnings
|
722
|
size_t i;
|
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add new function:...
|
723
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if (!port_index) {
i = flow.inlet[connection_index].V.size();
if (tmp_v2[1] != flow.inlet[connection_index].V[i - 1][1]) {
V.resize(4);
V[0] = flow.inlet[connection_index].V[0];
V[1] = tmp_v1;
V[2] = tmp_v2;
V[3] = flow.inlet[connection_index].V[i - 1];
std::swap(flow.inlet[connection_index].V, V);
}
else {
V.resize(3);
V[0] = flow.inlet[connection_index].V[0];
V[1] = tmp_v1;
V[2] = tmp_v2;
std::swap(flow.inlet[connection_index].V, V);
}
// calculate new length
for (unsigned i = 0; i < flow.inlet[connection_index].V.size() - 1; i++) {
l += (flow.inlet[connection_index].V[i + 1] - flow.inlet[connection_index].V[i]).len();
}
flow.inlet[connection_index].l = l;
}
else {
i = flow.outlet[connection_index].V.size();
if (tmp_v2[1] != flow.outlet[connection_index].V[i - 1][1]) {
V.resize(4);
V[0] = flow.outlet[connection_index].V[0];
V[1] = tmp_v1;
V[2] = tmp_v2;
V[3] = flow.outlet[connection_index].V[i - 1];
std::swap(flow.outlet[connection_index].V, V);
}
else {
V.resize(3);
V[0] = flow.outlet[connection_index].V[0];
V[1] = tmp_v1;
V[2] = tmp_v2;
std::swap(flow.outlet[connection_index].V, V);
}
// calculate new length
for (unsigned i = 0; i < flow.outlet[connection_index].V.size() - 1; i++) {
l += (flow.outlet[connection_index].V[i + 1] - flow.outlet[connection_index].V[i]).len();
}
flow.outlet[connection_index].l = l;
}
redisplay = true;
render_new_connection = false;
picked_connection = false;
flow.check_direct_connection();
flow.backup(); // back up direct synthetic connections
}
// move connections along x-axis
else if (button == GLUT_LEFT_BUTTON && state == GLUT_DOWN && mods == GLUT_ACTIVE_CTRL && !modified_bridge && !picked_connection) {
GLdouble posX, posY, posZ;
window_to_world(posX, posY, posZ); // get the world coordinates
bool flag = flow.epsilon_edge((float)posX, (float)posY, (float)posZ, eps, connection_index, port_index);
if (flag) {
picked_connection = true;
picked_x = x;
picked_y = y;
if (!port_index)
coef = 1;
else
coef = -1;
}
else
picked_connection = false;
}
else if (button == GLUT_LEFT_BUTTON && state == GLUT_DOWN && mods == GLUT_ACTIVE_CTRL && !modified_bridge && render_new_connection) {
float l = 0.0f;
if (!port_index) {
flow.inlet[connection_index].V[0] = tmp_v1;
flow.inlet[connection_index].V[1] = tmp_v2;
// calculate new length
for (unsigned i = 0; i < flow.inlet[connection_index].V.size() - 1; i++) {
l += (flow.inlet[connection_index].V[i + 1] - flow.inlet[connection_index].V[i]).len();
}
flow.inlet[connection_index].l = l;
}
else {
flow.outlet[connection_index].V[0] = tmp_v1;
flow.outlet[connection_index].V[1] = tmp_v2;
// calculate new length
for (unsigned i = 0; i < flow.outlet[connection_index].V.size() - 1; i++) {
l += (flow.outlet[connection_index].V[i + 1] - flow.outlet[connection_index].V[i]).len();
}
flow.outlet[connection_index].l = l;
}
redisplay = true;
render_new_connection = false;
picked_connection = false;
flow.check_direct_connection();
flow.backup();
}
|
9191c39e
Jiaming Guo
first version of ...
|
823
824
825
826
827
|
}
// define camera move based on mouse wheel move
void glut_wheel(int wheel, int direction, int x, int y) {
|
6ea69c93
Jiaming Guo
change bus size
|
828
829
|
mods = glutGetModifiers();
|
9191c39e
Jiaming Guo
first version of ...
|
830
831
832
833
834
835
|
mouse_x = x;
mouse_y = y;
GLdouble posX, posY, posZ;
window_to_world(posX, posY, posZ); // get the world coordinates
|
4bb615eb
Jiaming Guo
fixed generating ...
|
836
|
if (!to_select_pressure && (simulation || build_inlet_outlet || manufacture)) { // check current pixel position only in simualtion and build_inlet_outlet modes
|
6ea69c93
Jiaming Guo
change bus size
|
837
|
bool flag = flow.epsilon_vertex((float)posX, (float)posY, (float)posZ, eps, scale, pressure_index);
|
ce1a6f5e
Jiaming Guo
add functions for...
|
838
|
if (flag && simulation && !glyph_mode) {
|
9191c39e
Jiaming Guo
first version of ...
|
839
840
841
842
843
844
845
846
847
|
float tmp_r;
if (direction > 0) { // increase radii
tmp_r = flow.get_radius(pressure_index);
tmp_r += radii_factor;
}
else {
tmp_r = flow.get_radius(pressure_index);
tmp_r -= radii_factor;
if (tmp_r <= 0)
|
8334680a
Jiaming Guo
add square wave c...
|
848
|
tmp_r = default_radius;
|
9191c39e
Jiaming Guo
first version of ...
|
849
850
|
}
flow.set_radius(pressure_index, tmp_r);
|
ce1a6f5e
Jiaming Guo
add functions for...
|
851
|
undo = true; // undo rendering
|
9191c39e
Jiaming Guo
first version of ...
|
852
|
}
|
6ea69c93
Jiaming Guo
change bus size
|
853
|
else if (!mods) {
|
9191c39e
Jiaming Guo
first version of ...
|
854
855
856
857
858
859
860
861
|
if (direction > 0) // if it is button 3(up), move closer
move_pace = zoom_factor;
else // if it is button 4(down), leave farther
move_pace = -zoom_factor;
cam.Push(move_pace);
}
}
|
6ea69c93
Jiaming Guo
change bus size
|
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
|
// rescale
if (mods == GLUT_ACTIVE_CTRL) {
if (direction > 0) {
if (scale >= 1)
scale += 1.0f;
else
scale += 0.1f;
}
else {
if (scale > 1)
scale -= 1.0f;
else if (scale <= 1 && scale > 0.1f)
scale -= 0.1f;
else
scale = 1.0f;
}
|
ce1a6f5e
Jiaming Guo
add functions for...
|
879
880
|
undo = true;
redisplay = true;
|
6ea69c93
Jiaming Guo
change bus size
|
881
|
}
|
9191c39e
Jiaming Guo
first version of ...
|
882
883
884
885
886
887
888
889
890
|
glutPostRedisplay();
}
// define keyboard inputs
void glut_keyboard(unsigned char key, int x, int y) {
// register different keyboard operation
switch (key) {
|
b61addd8
Jiaming Guo
add adjustment fe...
|
891
892
893
894
|
// saving network flow profile
case 's':
flow.save_network();
|
9191c39e
Jiaming Guo
first version of ...
|
895
|
break;
|
057ea93b
Jiaming Guo
add flow velocity...
|
896
|
|
ce1a6f5e
Jiaming Guo
add functions for...
|
897
898
899
900
901
902
903
904
905
906
|
// convert network to binary format (.nwt)
case 'c': {
std::vector<std::string> tmp = stim::parser::split(args.arg(0), '.');
std::stringstream ss;
ss << tmp[0] << ".nwt";
std::string filename = ss.str();
flow.saveNwt(filename);
break;
}
|
057ea93b
Jiaming Guo
add flow velocity...
|
907
908
|
// flow vector field visualization, Glyphs
case 'f':
|
ce1a6f5e
Jiaming Guo
add functions for...
|
909
910
911
|
if (glyph_mode && !manufacture && (simulation || build_inlet_outlet)) {
glyph_mode = false;
frame_mode = false;
|
0224d2ef
Jiaming Guo
fixed square wave...
|
912
913
914
915
916
|
redisplay = true; // lines and arrows rendering use the same display list
int num = glutGet(GLUT_MENU_NUM_ITEMS);
if (num == 1)
glut_set_menu(num, 2);
}
|
ce1a6f5e
Jiaming Guo
add functions for...
|
917
918
|
else if (!glyph_mode && !manufacture && (simulation || build_inlet_outlet)) {
glyph_mode = true;
|
0224d2ef
Jiaming Guo
fixed square wave...
|
919
920
921
922
923
|
redisplay = true;
int num = glutGet(GLUT_MENU_NUM_ITEMS);
if (num == 2)
glut_set_menu(num, 1);
}
|
ce1a6f5e
Jiaming Guo
add functions for...
|
924
925
926
927
928
929
930
931
932
933
934
|
undo = true;
break;
// filaments around arrows
case 'g':
if (glyph_mode) {
if (frame_mode)
frame_mode = false;
else
frame_mode = true;
}
|
057ea93b
Jiaming Guo
add flow velocity...
|
935
|
break;
|
b61addd8
Jiaming Guo
add adjustment fe...
|
936
|
|
6ea69c93
Jiaming Guo
change bus size
|
937
938
939
940
941
942
|
// open/close index marks
case 'e':
if (mark_index)
mark_index = false;
else
mark_index = true;
|
ce1a6f5e
Jiaming Guo
add functions for...
|
943
|
undo = true;
|
6ea69c93
Jiaming Guo
change bus size
|
944
945
|
break;
|
9191c39e
Jiaming Guo
first version of ...
|
946
947
948
949
|
// output image stack
case 'm':
if (manufacture) {
#ifdef __CUDACC__
|
4bb615eb
Jiaming Guo
fixed generating ...
|
950
|
flow.make_image_stack(S, dx, dy, dz, stackdir, image_stack, default_radius, scale);
|
b61addd8
Jiaming Guo
add adjustment fe...
|
951
|
|
9191c39e
Jiaming Guo
first version of ...
|
952
953
954
955
956
|
#else
std::cout << "You need to have a gpu to make image stack, sorry." << std::endl;
#endif
}
else if (build_inlet_outlet && !modified_bridge) {
|
9191c39e
Jiaming Guo
first version of ...
|
957
|
modified_bridge = true;
|
8334680a
Jiaming Guo
add square wave c...
|
958
959
|
if (hilbert_curve)
|
6332d1e7
Jiaming Guo
fixed warnings
|
960
|
flow.modify_synthetic_connection(u, rou, hilbert_curve, height_threshold, in, out, 2, fragment_ratio);
|
8334680a
Jiaming Guo
add square wave c...
|
961
962
|
else
change_fragment = true;
|
9191c39e
Jiaming Guo
first version of ...
|
963
964
965
|
}
break;
}
|
8334680a
Jiaming Guo
add square wave c...
|
966
|
|
9191c39e
Jiaming Guo
first version of ...
|
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
|
glutPostRedisplay();
}
// glut initialization
void glut_initialize() {
int myargc = 1;
char* myargv[1];
myargv[0] = strdup("generate_network_network");
glutInit(&myargc, myargv);
glutInitDisplayMode(GLUT_DEPTH | GLUT_DOUBLE | GLUT_RGBA);
glutInitWindowPosition(100, 100); // set the initial window position
glutInitWindowSize(1000, 1000);
glutCreateWindow("3D flow simulation");
glutDisplayFunc(glut_render);
glutMouseFunc(glut_mouse);
glutMotionFunc(glut_motion);
|
9e60c6a7
Jiaming Guo
fixed minor bug i...
|
986
|
glutPassiveMotionFunc(glut_passive_motion);
|
9191c39e
Jiaming Guo
first version of ...
|
987
988
989
990
991
992
993
994
995
996
997
998
999
|
glutMouseWheelFunc(glut_wheel);
glutKeyboardFunc(glut_keyboard);
glutCreateMenu(glut_menu); // create a menu object
glut_set_menu(0, 1);
glutAttachMenu(GLUT_RIGHT_BUTTON); // register right mouse to open menu option
stim::vec3<float> c = bb.center(); // get the center of the network bounding box
// place the camera along the z-axis at a distance determined by the network size along x and y
cam.setPosition(c + stim::vec<float>(0, 0, camera_factor * std::max(bb.size()[0], bb.size()[1])));
cam.LookAt(c[0], c[1], c[2]);
}
|
9e60c6a7
Jiaming Guo
fixed minor bug i...
|
1000
1001
1002
1003
|
// output an advertisement for the lab, authors and usage information
void advertise() {
std::cout << std::endl << std::endl;
std::cout << " =======================================================================================" << std::endl;
|
b61addd8
Jiaming Guo
add adjustment fe...
|
1004
|
std::cout << "|Thank you for using the AFAN tool! |" << std::endl;
|
9e60c6a7
Jiaming Guo
fixed minor bug i...
|
1005
1006
1007
1008
1009
|
std::cout << "|Scalable Tissue Imaging and Modeling (STIM) Lab, University of Houston |" << std::endl;
std::cout << "|Developers: Jiaming Guo, David Mayerich |" << std::endl;
std::cout << "|Source: https://git.stim.ee.uh.edu/Jack/flow3.git |" << std::endl;
std::cout << " =======================================================================================" << std::endl << std::endl;
|
616c5f99
Jiaming Guo
add advertise
|
1010
1011
|
std::cout << "Usage(keyboard): e -> open/close indexing" << std::endl;
std::cout << " m -> build synthetic connections(connection mode)/output augmented network as image stack (manufacture mode)" << std::endl;
|
ce1a6f5e
Jiaming Guo
add functions for...
|
1012
1013
1014
1015
|
std::cout << " s -> save network flow profiles in profile folder as cvs files" << std::endl;
std::cout << " c -> convert .obj network to .nwt network and stores in main folder" << std::endl;
std::cout << " f -> open/close vector field visualization mode" << std::endl;
std::cout << " g -> render filament frames in vector fiedl visualization mode" << std::endl;
|
616c5f99
Jiaming Guo
add advertise
|
1016
|
|
9e60c6a7
Jiaming Guo
fixed minor bug i...
|
1017
1018
1019
1020
|
std::cout << args.str();
}
// main function: parse arguments and initialize GLUT
|
9191c39e
Jiaming Guo
first version of ...
|
1021
1022
1023
1024
|
int main(int argc, char* argv[]) {
// add arguments
args.add("help", "prints the help");
|
b61addd8
Jiaming Guo
add adjustment fe...
|
1025
|
args.add("units", "string indicating units of length for output measurements (ex. velocity)", "um", "text string");
|
9191c39e
Jiaming Guo
first version of ...
|
1026
1027
1028
|
args.add("maxpress", "maximum allowed pressure in g / units / s^2, default 2 is for blood when units = um", "2", "real value > 0");
args.add("viscosity", "set the viscosity of the fluid (in g / units / s), default .00001 is for blood when units = um", ".00001", "real value > 0");
args.add("rou", "set the desity of the fluid (in g / units^3), default 1.06*10^-12 is for blood when units = um", ".00000000000106", "real value > 0");
|
6332d1e7
Jiaming Guo
fixed warnings
|
1029
|
args.add("hilbert", "activate hilbert curves connections");
|
b61addd8
Jiaming Guo
add adjustment fe...
|
1030
|
args.add("stack", "load the image stack");
|
9191c39e
Jiaming Guo
first version of ...
|
1031
1032
|
args.add("stackres", "spacing between pixel samples in each dimension(in units/pixel)", "1 1 1", "real value > 0");
args.add("stackdir", "set the directory of the output image stack", "", "any existing directory (ex. /home/name/network)");
|
ce1a6f5e
Jiaming Guo
add functions for...
|
1033
1034
|
args.add("scale", "scale down rendering fibers");
args.add("lcc", "extract the largest connected component");
|
9191c39e
Jiaming Guo
first version of ...
|
1035
1036
1037
|
args.parse(argc, argv); // parse the command line
|
9e60c6a7
Jiaming Guo
fixed minor bug i...
|
1038
1039
1040
1041
1042
|
if (args["help"].is_set()) {
advertise();
std::exit(1);
}
|
9191c39e
Jiaming Guo
first version of ...
|
1043
|
// load network
|
6751e826
David Mayerich
fixed 'index out ...
|
1044
1045
1046
1047
1048
1049
|
if (args.nargs() == 0) {
std::cout << "Network file required." << std::endl;
return 1;
}
else { // load network from user
std::vector<std::string> tmp = stim::parser::split(args.arg(0), '.');
|
9191c39e
Jiaming Guo
first version of ...
|
1050
|
if ("obj" == tmp[1])
|
6751e826
David Mayerich
fixed 'index out ...
|
1051
|
flow.load_obj(args.arg(0));
|
ce1a6f5e
Jiaming Guo
add functions for...
|
1052
1053
|
else if ("nwt" == tmp[1]) // stim network binary format
flow.loadNwt(args.arg(0));
|
9191c39e
Jiaming Guo
first version of ...
|
1054
|
else if ("swc" == tmp[1])
|
6751e826
David Mayerich
fixed 'index out ...
|
1055
|
flow.load_swc(args.arg(0));
|
9191c39e
Jiaming Guo
first version of ...
|
1056
1057
1058
1059
1060
|
else {
std::cout << "Invalid file type" << std::endl;
std::exit(1);
}
}
|
ce1a6f5e
Jiaming Guo
add functions for...
|
1061
1062
|
// extract the largest connected component
|
9191c39e
Jiaming Guo
first version of ...
|
1063
|
|
b61addd8
Jiaming Guo
add adjustment fe...
|
1064
1065
1066
1067
|
// get the units to work on
units = args["units"].as_string();
flow.set_units(units);
|
9191c39e
Jiaming Guo
first version of ...
|
1068
1069
|
// blood pressure in capillaries range from 15 - 35 torr
// 1 torr = 133.3 Pa
|
6332d1e7
Jiaming Guo
fixed warnings
|
1070
|
max_pressure = (float)args["maxpress"].as_float();
|
9191c39e
Jiaming Guo
first version of ...
|
1071
1072
1073
|
// normal blood viscosity range from 4 - 15 mPa·s(cP)
// 1 Pa·s = 1 g / mm / s
|
6332d1e7
Jiaming Guo
fixed warnings
|
1074
|
u = (float)args["viscosity"].as_float(); // g / units / s
|
9191c39e
Jiaming Guo
first version of ...
|
1075
1076
|
// normally the blood density in capillaries: 1060 kg/m^3 = 1.06*10^-12 g/um^3
|
6332d1e7
Jiaming Guo
fixed warnings
|
1077
|
rou = (float)args["rou"].as_float();
|
9191c39e
Jiaming Guo
first version of ...
|
1078
|
|
8334680a
Jiaming Guo
add square wave c...
|
1079
|
// check whether to enable hilbert curves or not
|
6332d1e7
Jiaming Guo
fixed warnings
|
1080
|
hilbert_curve = args["hilbert"].is_set();
|
8334680a
Jiaming Guo
add square wave c...
|
1081
|
|
b61addd8
Jiaming Guo
add adjustment fe...
|
1082
1083
1084
1085
1086
1087
|
// load image stack if provided
if (args["stack"].is_set()) {
image_stack = true;
S.load_images(args["stack"].as_string());
// binary transformation
#ifdef __CUDACC__
|
6332d1e7
Jiaming Guo
fixed warnings
|
1088
|
size_t N = S.samples(); // number of pixels loaded
|
ce1a6f5e
Jiaming Guo
add functions for...
|
1089
|
unsigned char* d_S; // image stack stored in device
|
b61addd8
Jiaming Guo
add adjustment fe...
|
1090
1091
1092
1093
|
unsigned char* h_S = (unsigned char*)malloc(N * sizeof(unsigned char)); // image stack stored in host
cudaMalloc((void**)&d_S, N * sizeof(unsigned char));
cudaMemcpy(d_S, S.data(), N * sizeof(unsigned char), cudaMemcpyHostToDevice);
|
6332d1e7
Jiaming Guo
fixed warnings
|
1094
1095
|
size_t thread = 1024;
size_t block = N / thread + 1;
|
ce1a6f5e
Jiaming Guo
add functions for...
|
1096
|
binary_transform <<<block, thread>>> (N, d_S, binary_threshold); // binaryzation
|
b61addd8
Jiaming Guo
add adjustment fe...
|
1097
1098
1099
1100
|
cudaMemcpy(h_S, d_S, N * sizeof(unsigned char), cudaMemcpyDeviceToHost);
S.copy(h_S);
|
b61addd8
Jiaming Guo
add adjustment fe...
|
1101
1102
1103
|
#endif
}
|
9191c39e
Jiaming Guo
first version of ...
|
1104
|
// get the vexel and image stack size
|
6332d1e7
Jiaming Guo
fixed warnings
|
1105
1106
1107
|
dx = (float)args["stackres"].as_float(0);
dy = (float)args["stackres"].as_float(1);
dz = (float)args["stackres"].as_float(2);
|
9191c39e
Jiaming Guo
first version of ...
|
1108
1109
1110
1111
1112
|
// get the save directory of image stack
if (args["stackdir"].is_set())
stackdir = args["stackdir"].as_string();
|
ce1a6f5e
Jiaming Guo
add functions for...
|
1113
1114
|
// get the scale-down factor is provided
if (args["scale"].is_set())
|
6332d1e7
Jiaming Guo
fixed warnings
|
1115
|
scale = (float)args["scale"].as_float();
|
ce1a6f5e
Jiaming Guo
add functions for...
|
1116
|
|
9191c39e
Jiaming Guo
first version of ...
|
1117
1118
1119
1120
1121
|
// glut main loop
bb = flow.boundingbox();
glut_initialize();
glutMainLoop();
}
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