/*
Makes mapping from real 3D coordinates, passed as coords array,
to 2D terminal coordinates, then draws filled polygon
*/
void
filled_polygon_common(int points, struct coordinate GPHUGE * coords, TBOOLEAN fixed, double z)
{
int i;
double x, y;
gpiPoint *icorners;
icorners = gp_alloc(points * sizeof(gpiPoint), "filled_polygon3d corners");
for (i = 0; i < points; i++) {
if (fixed)
z = coords[i].z;
map3d_xy_double(coords[i].x, coords[i].y, z, &x, &y);
icorners[i].x = x;
icorners[i].y = y;
}
#ifdef EXTENDED_COLOR_SPECS
if ((term->flags & TERM_EXTENDED_COLOR)) {
icorners[0].spec.gray = -1; /* force solid color */
}
#endif
if (default_fillstyle.fillstyle == FS_EMPTY)
icorners->style = FS_OPAQUE;
else
icorners->style = style_from_fill(&default_fillstyle);
term->filled_polygon(points, icorners);
free(icorners);
}
/* Function to map from user 3D space to normalized 'camera' view
* space, and from there directly to terminal coordinates */
void
map3d_xy(
double x, double y, double z,
int *xt, int *yt)
{
double xtd, ytd;
map3d_xy_double(x, y, z, &xtd, &ytd);
*xt = xtd;
*yt = ytd;
}
void
filled_quadrangle(gpdPoint * corners)
#endif
{
int i;
double x, y;
#ifndef EXTENDED_COLOR_SPECS
gpiPoint icorners[4];
#endif
for (i = 0; i < 4; i++) {
map3d_xy_double(corners[i].x, corners[i].y, corners[i].z, &x, &y);
icorners[i].x = x;
icorners[i].y = y;
}
ifilled_quadrangle(icorners);
}
/*
Makes mapping from real 3D coordinates, passed as coords array, but at z coordinate
fixed (base_z, for instance) to 2D terminal coordinates, then draws filled polygon
*/
void
filled_polygon_3dcoords_zfixed(int points, struct coordinate GPHUGE * coords, double z)
{
int i;
double x, y;
gpiPoint *icorners;
icorners = gp_alloc(points * sizeof(gpiPoint), "filled_polygon_zfix corners");
for (i = 0; i < points; i++) {
map3d_xy_double(coords[i].x, coords[i].y, z, &x, &y);
icorners[i].x = x;
icorners[i].y = y;
}
#ifdef EXTENDED_COLOR_SPECS
if (supply_extended_color_specs) {
icorners[0].spec.gray = -1; /* force solid color */
}
#endif
if (default_fillstyle.fillstyle == FS_EMPTY)
icorners->style = FS_OPAQUE;
else
icorners->style = style_from_fill(&default_fillstyle);
term->filled_polygon(points, icorners);
free(icorners);
}
