void ofxMarchingCubes::debugDraw(){
glColor3f(1.0f, 1.0f, 1.0f);
drawFilled();
glLineWidth(2.0f);
glColor3f(0.0f, 0.0f, 0.0f);
drawWireFrame();
drawCube();
//drawGrid();
}
void
drawScene(void)
{
int i;
glEnable(GL_DEPTH_TEST);
glDepthFunc(GL_LEQUAL);
glClearColor(0.0, 0.0, 0.0, 0.0);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glPushMatrix();
glRotatef(ax, 1.0, 0.0, 0.0);
glRotatef(-ay, 0.0, 1.0, 0.0);
/* all the good stuff follows */
if (stencilOn) {
glEnable(GL_STENCIL_TEST);
glClear(GL_STENCIL_BUFFER_BIT);
glStencilMask(1);
glStencilFunc(GL_ALWAYS, 0, 1);
glStencilOp(GL_INVERT, GL_INVERT, GL_INVERT);
}
glColor3f(1.0, 1.0, 0.0);
for (i = 0; i < 6; i++) {
drawWireframe(i);
if (stencilOn) {
glStencilFunc(GL_EQUAL, 0, 1);
glStencilOp(GL_KEEP, GL_KEEP, GL_KEEP);
}
glColor3f(0.0, 0.0, 0.0);
drawFilled(i);
glColor3f(1.0, 1.0, 0.0);
if (stencilOn) {
glStencilFunc(GL_ALWAYS, 0, 1);
glStencilOp(GL_INVERT, GL_INVERT, GL_INVERT);
}
glColor3f(1.0, 1.0, 0.0);
drawWireframe(i);
}
glPopMatrix();
if (stencilOn)
glDisable(GL_STENCIL_TEST);
/* end of good stuff */
glutSwapBuffers();
}
void Arrow::draw ( const Point& from, const Point& to ) const
{
Vector v = to - from;
double length = v.length();
Vector n = v;
n.normalize();
Vector x( 1, 0, 0 ); // Canonical direction for drawing the arrow
double theta = n * x;
Vector r = x.cross( v ); // Rotation vector
double rl = r.length();
if ( fabs( rl ) > 1e-6 )
r.normalize();
else
r = Vector( 0, 0, 1 ); // theta == 0 anyway
// Also, figure out how to rotate the arrow head so that it is
// normal to the view normal, i.e., so you can always see the side
// of the arrow head. Start by applying the orienting rotation to
// the canonical arrow head normal.
Matrix m( Matrix::ROTATION, r[X], r[Y], r[Z], -acos( theta ) );
Vector z( 0, 0, 1 );// Canonical arrow head normal
Vector zr = m * z;
Vector y( 0, 1, 0 );//The "other" direction (in the plane of n)
Vector yr = m * y;
double dz = zr * view_normal_;
double dy = yr * view_normal_;
double phi = atan2( dy, dz );
glPushMatrix();
glTranslated( from[X], from[Y], from[Z] );
glRotated( -180 * phi / M_PI, n[X], n[Y], n[Z] );
glRotated( 180 * acos( theta ) / M_PI, r[X], r[Y], r[Z] );
switch ( style_ ) {
case lC::OPEN:
drawOpen( length ); break;
case lC::HOLLOW:
drawHollow( length ); break;
case lC::FILLED:
drawFilled( length ); break;
}
glPopMatrix();
}
void Arrow::draw ( const Point& from, const Point& to ) const
{
Vector v = to - from;
double theta = v.orientation();
double length = v.length();
glPushMatrix();
glTranslated( from.p_[X], from.p_[Y], 0. );
glRotated( theta, 0., 0., 1. );
switch ( style_ ) {
case lC::OPEN:
drawOpen( length ); break;
case lC::HOLLOW:
drawHollow( length ); break;
case lC::FILLED:
drawFilled( length ); break;
}
glPopMatrix();
}