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/*
* mesh.cc
* DIN Is Noise is copyright (c) 2006-2018 Jagannathan Sampath
* For more information, please visit http://dinisnoise.org/
*/
#include "mesh.h"
#include "drone.h"
#include "dingl.h"
#include <fstream>
using namespace std;
extern ofstream dlog;
mesh::mesh () {
num_polys = 0;
r = g = b = 1;
}
void mesh::destroy () {
if (gl_pts) delete[] gl_pts;
}
void mesh::add_poly (drone* d0, drone* d1, drone* d2, drone* d3) {
++num_polys;
polys.push_back (poly (d0, d1, d2, d3));
int np = num_polys * 4;
if (np > n_glpts) {
if (gl_pts) delete[] gl_pts;
gl_pts = new int [2 * np];
n_glpts = np;
}
r = d0->r;
g = d0->g;
b = d0->b;
}
void mesh::remove_poly (drone* pd) {
for (poly_iterator i = polys.begin (); i != polys.end ();) {
poly& pi = *i;
int erased = 0;
for (int k = 0; k < 4; ++k) {
if (pi.drones[k] == pd) {
i = polys.erase (i);
erased = 1;
--num_polys;
break;
}
}
if (!erased) ++i;
}
}
void mesh::draw () {
// draw drone mesh
//
int m = 0, n = 0;
// run thru polygons of the mesh
for (poly_iterator i = polys.begin (), j = polys.end (); i != j; ++i) {
poly& p = *i;
for (int j = 0; j < 4; ++j) { // each polygon contains 4 drones
drone* pd = p.drones[j];
// add drone position to draw below
gl_pts[m++]= pd->sx;
gl_pts[m++]= pd->y;
++n;
}
}
// draw the polygons with few opengl calls
glColor4f (r, g, b, 0.6f);
glVertexPointer (2, GL_INT, 0, gl_pts);
glPolygonMode (GL_FRONT_AND_BACK, GL_FILL);
glDrawArrays (GL_QUADS, 0, n); // draw filled polygons
glColor4f (1, 1, 1, 1);
glPolygonMode (GL_FRONT_AND_BACK, GL_LINE);
glDrawArrays (GL_QUADS, 0, n); // draw polygon outlines
glPolygonMode (GL_FRONT_AND_BACK, GL_FILL);
}