Revision: 56363
http://sourceforge.net/p/brlcad/code/56363
Author: vladbogo
Date: 2013-07-30 20:55:26 +0000 (Tue, 30 Jul 2013)
Log Message:
-----------
Implemented the qt_drawVList function.
Modified Paths:
--------------
brlcad/trunk/src/libdm/dm-qt.cpp
Modified: brlcad/trunk/src/libdm/dm-qt.cpp
===================================================================
--- brlcad/trunk/src/libdm/dm-qt.cpp 2013-07-30 20:53:04 UTC (rev 56362)
+++ brlcad/trunk/src/libdm/dm-qt.cpp 2013-07-30 20:55:26 UTC (rev 56363)
@@ -226,10 +226,168 @@
HIDDEN int
-qt_drawVList(struct dm *UNUSED(dmp), struct bn_vlist *UNUSED(vp))
-{
- bu_log("qt_drawVList not implemented\n");
- return 0;
+qt_drawVList(struct dm *dmp, struct bn_vlist *vp)
+{
+ static vect_t spnt, lpnt, pnt;
+ struct bn_vlist *tvp;
+ QLine lines[1024];
+ QLine *linep;
+ int nseg;
+ fastf_t delta;
+ point_t *pt_prev = NULL;
+ fastf_t dist_prev=1.0;
+ struct qt_vars *privars = (struct qt_vars *)dmp->dm_vars.priv_vars;
+
+ /* delta is used in clipping to insure clipped endpoint is
+ * slightly in front of eye plane (perspective mode only). This
+ * value is a SWAG that seems to work OK.
+ */
+ delta = privars->qmat[15]*0.0001;
+ if (delta < 0.0)
+ delta = -delta;
+ if (delta < SQRT_SMALL_FASTF)
+ delta = SQRT_SMALL_FASTF;
+
+ nseg = 0;
+ linep = lines;
+ for (BU_LIST_FOR(tvp, bn_vlist, &vp->l)) {
+ int i;
+ int nused = tvp->nused;
+ int *cmd = tvp->cmd;
+ point_t *pt = tvp->pt;
+ fastf_t dist;
+
+ for (i = 0; i < nused; i++, cmd++, pt++) {
+ switch (*cmd) {
+ case BN_VLIST_POLY_START:
+ case BN_VLIST_POLY_VERTNORM:
+ case BN_VLIST_TRI_START:
+ case BN_VLIST_TRI_VERTNORM:
+ continue;
+ case BN_VLIST_POLY_MOVE:
+ case BN_VLIST_LINE_MOVE:
+ case BN_VLIST_TRI_MOVE:
+ /* Move, not draw */
+ if (dmp->dm_perspective > 0) {
+ /* cannot apply perspective transformation to
+ * points behind eye plane!!!!
+ */
+ dist = VDOT(*pt, &privars->qmat[12]) +
privars->qmat[15];
+ if (dist <= 0.0) {
+ pt_prev = pt;
+ dist_prev = dist;
+ continue;
+ } else {
+ MAT4X3PNT(lpnt, privars->qmat, *pt);
+ dist_prev = dist;
+ pt_prev = pt;
+ }
+ } else {
+ MAT4X3PNT(lpnt, privars->qmat, *pt);
+ }
+
+ lpnt[0] *= 2047;
+ lpnt[1] *= 2047 * dmp->dm_aspect;
+ lpnt[2] *= 2047;
+ continue;
+ case BN_VLIST_POLY_DRAW:
+ case BN_VLIST_POLY_END:
+ case BN_VLIST_LINE_DRAW:
+ case BN_VLIST_TRI_DRAW:
+ case BN_VLIST_TRI_END:
+ /* draw */
+ if (dmp->dm_perspective > 0) {
+ dist = VDOT(*pt, &privars->qmat[12]) +
privars->qmat[15];
+ if (dist <= 0.0) {
+ if (dist_prev <= 0.0) {
+ /* nothing to plot */
+ dist_prev = dist;
+ pt_prev = pt;
+ continue;
+ } else {
+ if (pt_prev) {
+ fastf_t alpha;
+ vect_t diff;
+ point_t tmp_pt;
+
+ /* clip this end */
+ VSUB2(diff, *pt, *pt_prev);
+ alpha = (dist_prev - delta) / (dist_prev -
dist);
+ VJOIN1(tmp_pt, *pt_prev, alpha, diff);
+ MAT4X3PNT(pnt, privars->qmat, tmp_pt);
+ }
+ }
+ } else {
+ if (dist_prev <= 0.0) {
+ if (pt_prev) {
+ fastf_t alpha;
+ vect_t diff;
+ point_t tmp_pt;
+
+ /* clip other end */
+ VSUB2(diff, *pt, *pt_prev);
+ alpha = (-dist_prev + delta) / (dist -
dist_prev);
+ VJOIN1(tmp_pt, *pt_prev, alpha, diff);
+ MAT4X3PNT(lpnt, privars->qmat, tmp_pt);
+ lpnt[0] *= 2047;
+ lpnt[1] *= 2047 * dmp->dm_aspect;
+ lpnt[2] *= 2047;
+ MAT4X3PNT(pnt, privars->qmat, *pt);
+ }
+ } else {
+ MAT4X3PNT(pnt, privars->qmat, *pt);
+ }
+ }
+ dist_prev = dist;
+ } else {
+ MAT4X3PNT(pnt, privars->qmat, *pt);
+ }
+
+ pnt[0] *= 2047;
+ pnt[1] *= 2047 * dmp->dm_aspect;
+ pnt[2] *= 2047;
+
+ /* save pnt --- it might get changed by clip() */
+ VMOVE(spnt, pnt);
+ pt_prev = pt;
+
+ if (dmp->dm_zclip) {
+ if (vclip(lpnt, pnt,
+ dmp->dm_clipmin,
+ dmp->dm_clipmax) == 0) {
+ VMOVE(lpnt, spnt);
+ continue;
+ }
+ }
+ /* convert to Qt window coordinates */
+ linep->setLine ((short)GED_TO_Xx(dmp, lpnt[0]),
+ (short)GED_TO_Xy(dmp, lpnt[1]),
+ (short)GED_TO_Xx(dmp, pnt[0]),
+ (short)GED_TO_Xy(dmp, pnt[1])
+ );
+
+ nseg++;
+ linep++;
+ VMOVE(lpnt, spnt);
+
+ if (nseg == 1024) {
+ privars->painter->drawLines(lines, nseg);
+ nseg = 0;
+ linep = lines;
+ }
+ break;
+ case BN_VLIST_POINT_DRAW:
+ break;
+ }
+ }
+ }
+
+ if (nseg) {
+ privars->painter->drawLines(lines, nseg);
+ }
+
+ bu_log("qt_drawVList called\n");
+ return TCL_OK;
}
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