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Use lines instead of columns for some BIH tracing code
authorbones_was_here <bones_was_here@xonotic.au>
Mon, 3 Jun 2024 15:19:22 +0000 (01:19 +1000)
committerDes <xon@damianv.com.ar>
Mon, 5 Aug 2024 11:59:14 +0000 (08:59 -0300)
See https://gitlab.com/xonotic/darkplaces/-/merge_requests/149 comments.

Signed-off-by: bones_was_here <bones_was_here@xonotic.au>
model_brush.c patch | blob | history

diff --git a/model_brush.c b/model_brush.c
index a69a7eed152137bc7e331883b19affc9f3b549be..30acb60d3f0a6f27b1a6224283acb685cfd38877 100644 (file)
--- a/model_brush.c
+++ b/model_brush.c
@@ -6916,22 +6916,126 @@ static void Mod_CollisionBIH_TraceLineShared(model_t *model, const frameblend_t
                                d1 = d2 = d3 = d4 = 1; // force full recursion
                        switch((d1 < 0) | ((d2 < 0) << 1) | ((d3 < 0) << 2) | ((d4 < 0) << 3))
                        {
-                       case  0: /* >>>> */                     VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;                      VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
-                       case  1: /* <>>> */ f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;                      VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
-                       case  2: /* ><>> */ f = d1 / (d1 - d2); VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;                      VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
-                       case  3: /* <<>> */                                                                                                                                                                                                                      VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
-                       case  4: /* >><> */                     VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;  f = d3 / (d3 - d4); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
-                       case  5: /* <><> */ f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;  f = d3 / (d3 - d4); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
-                       case  6: /* ><<> */ f = d1 / (d1 - d2); VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;  f = d3 / (d3 - d4); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
-                       case  7: /* <<<> */                                                                                                                                                                                                  f = d3 / (d3 - d4); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
-                       case  8: /* >>>< */                     VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;  f = d3 / (d3 - d4); VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
-                       case  9: /* <>>< */ f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;  f = d3 / (d3 - d4); VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
-                       case 10: /* ><>< */ f = d1 / (d1 - d2); VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;  f = d3 / (d3 - d4); VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
-                       case 11: /* <<>< */                                                                                                                                                                                                  f = d3 / (d3 - d4); VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
-                       case 12: /* >><< */                     VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;                                                                                                                                                                                                   break;
-                       case 13: /* <><< */ f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;                                                                                                                                                                                                   break;
-                       case 14: /* ><<< */ f = d1 / (d1 - d2); VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;                                                                                                                                                                                                   break;
-                       case 15: /* <<<< */                                                                                                                                                                                                                                                                                                                                                                                                   break;
+                       case  0: /* >>>> */
+                               VectorCopy(nodestart, nodestackline[nodestackpos]);
+                               VectorCopy(nodeend, nodestackline[nodestackpos] + 3);
+                               nodestack[nodestackpos++] = node->back;
+                               VectorCopy(nodestart, nodestackline[nodestackpos]);
+                               VectorCopy(nodeend, nodestackline[nodestackpos] + 3);
+                               nodestack[nodestackpos++] = node->front;
+                               break;
+                       case  1: /* <>>> */
+                               f = d1 / (d1 - d2);
+                               VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos]);
+                               VectorCopy(nodeend, nodestackline[nodestackpos] + 3);
+                               nodestack[nodestackpos++] = node->back;
+                               VectorCopy(nodestart, nodestackline[nodestackpos]);
+                               VectorCopy(nodeend, nodestackline[nodestackpos] + 3);
+                               nodestack[nodestackpos++] = node->front;
+                               break;
+                       case  2: /* ><>> */
+                               f = d1 / (d1 - d2);
+                               VectorCopy(nodestart, nodestackline[nodestackpos]);
+                               VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos] + 3);
+                               nodestack[nodestackpos++] = node->back;
+                               VectorCopy(nodestart, nodestackline[nodestackpos]);
+                               VectorCopy(nodeend, nodestackline[nodestackpos] + 3);
+                               nodestack[nodestackpos++] = node->front;
+                               break;
+                       case  3: /* <<>> */
+                               VectorCopy(nodestart, nodestackline[nodestackpos]);
+                               VectorCopy(nodeend, nodestackline[nodestackpos] + 3);
+                               nodestack[nodestackpos++] = node->front;
+                               break;
+                       case  4: /* >><> */
+                               VectorCopy(nodestart, nodestackline[nodestackpos]);
+                               VectorCopy(nodeend, nodestackline[nodestackpos] + 3);
+                               nodestack[nodestackpos++] = node->back;
+                               f = d3 / (d3 - d4);
+                               VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos]);
+                               VectorCopy(nodeend, nodestackline[nodestackpos] + 3);
+                               nodestack[nodestackpos++] = node->front;
+                               break;
+                       case  5: /* <><> */
+                               f = d1 / (d1 - d2);
+                               VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos]);
+                               VectorCopy(nodeend, nodestackline[nodestackpos] + 3);
+                               nodestack[nodestackpos++] = node->back;
+                               f = d3 / (d3 - d4);
+                               VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos]);
+                               VectorCopy(nodeend, nodestackline[nodestackpos] + 3);
+                               nodestack[nodestackpos++] = node->front;
+                               break;
+                       case  6: /* ><<> */
+                               f = d1 / (d1 - d2);
+                               VectorCopy(nodestart, nodestackline[nodestackpos]);
+                               VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos] + 3);
+                               nodestack[nodestackpos++] = node->back;
+                               f = d3 / (d3 - d4);
+                               VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos]);
+                               VectorCopy(nodeend, nodestackline[nodestackpos] + 3);
+                               nodestack[nodestackpos++] = node->front;
+                               break;
+                       case  7: /* <<<> */
+                               f = d3 / (d3 - d4);
+                               VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos]);
+                               VectorCopy(nodeend, nodestackline[nodestackpos] + 3);
+                               nodestack[nodestackpos++] = node->front;
+                               break;
+                       case  8: /* >>>< */
+                               VectorCopy(nodestart, nodestackline[nodestackpos]);
+                               VectorCopy(nodeend, nodestackline[nodestackpos] + 3);
+                               nodestack[nodestackpos++] = node->back;
+                               f = d3 / (d3 - d4);
+                               VectorCopy(nodestart, nodestackline[nodestackpos]);
+                               VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos] + 3);
+                               nodestack[nodestackpos++] = node->front;
+                               break;
+                       case  9: /* <>>< */
+                               f = d1 / (d1 - d2);
+                               VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos]);
+                               VectorCopy(nodeend, nodestackline[nodestackpos] + 3);
+                               nodestack[nodestackpos++] = node->back;
+                               f = d3 / (d3 - d4);
+                               VectorCopy(nodestart, nodestackline[nodestackpos]);
+                               VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos] + 3);
+                               nodestack[nodestackpos++] = node->front;
+                               break;
+                       case 10: /* ><>< */
+                               f = d1 / (d1 - d2);
+                               VectorCopy(nodestart, nodestackline[nodestackpos]);
+                               VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos] + 3);
+                               nodestack[nodestackpos++] = node->back;
+                               f = d3 / (d3 - d4);
+                               VectorCopy(nodestart, nodestackline[nodestackpos]);
+                               VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos] + 3);
+                               nodestack[nodestackpos++] = node->front;
+                               break;
+                       case 11: /* <<>< */
+                               f = d3 / (d3 - d4);
+                               VectorCopy(nodestart, nodestackline[nodestackpos]);
+                               VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos] + 3);
+                               nodestack[nodestackpos++] = node->front;
+                               break;
+                       case 12: /* >><< */
+                               VectorCopy(nodestart, nodestackline[nodestackpos]);
+                               VectorCopy(nodeend, nodestackline[nodestackpos] + 3);
+                               nodestack[nodestackpos++] = node->back;
+                               break;
+                       case 13: /* <><< */
+                               f = d1 / (d1 - d2);
+                               VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos]);
+                               VectorCopy(nodeend, nodestackline[nodestackpos] + 3);
+                               nodestack[nodestackpos++] = node->back;
+                               break;
+                       case 14: /* ><<< */
+                               f = d1 / (d1 - d2);
+                               VectorCopy(nodestart, nodestackline[nodestackpos]);
+                               VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos] + 3);
+                               nodestack[nodestackpos++] = node->back;
+                               break;
+                       case 15: /* <<<< */
+                               break;
                        }
                }
                else if (node->type == BIH_UNORDERED)
@@ -7072,22 +7176,125 @@ void Mod_CollisionBIH_TraceBrush(model_t *model, const frameblend_t *frameblend,
                        d4 = nodeend[axis] - node->frontmin + maxs[axis];
                        switch((d1 < 0) | ((d2 < 0) << 1) | ((d3 < 0) << 2) | ((d4 < 0) << 3))
                        {
-                       case  0: /* >>>> */                     VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;                      VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
-                       case  1: /* <>>> */ f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;                      VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
-                       case  2: /* ><>> */ f = d1 / (d1 - d2); VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;                      VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
-                       case  3: /* <<>> */                                                                                                                                                                                                                      VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
-                       case  4: /* >><> */                     VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;  f = d3 / (d3 - d4); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
-                       case  5: /* <><> */ f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;  f = d3 / (d3 - d4); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
-                       case  6: /* ><<> */ f = d1 / (d1 - d2); VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;  f = d3 / (d3 - d4); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
-                       case  7: /* <<<> */                                                                                                                                                                                                  f = d3 / (d3 - d4); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
-                       case  8: /* >>>< */                     VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;  f = d3 / (d3 - d4); VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
-                       case  9: /* <>>< */ f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;  f = d3 / (d3 - d4); VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
-                       case 10: /* ><>< */ f = d1 / (d1 - d2); VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;  f = d3 / (d3 - d4); VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
-                       case 11: /* <<>< */                                                                                                                                                                                                  f = d3 / (d3 - d4); VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->front; break;
-                       case 12: /* >><< */                     VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;                                                                                                                                                                                                   break;
-                       case 13: /* <><< */ f = d1 / (d1 - d2); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos]); VectorCopy(              nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;                                                                                                                                                                                                   break;
-                       case 14: /* ><<< */ f = d1 / (d1 - d2); VectorCopy(nodestart,             nodestackline[nodestackpos]); VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos] + 3); nodestack[nodestackpos++] = node->back;                                                                                                                                                                                                   break;
-                       case 15: /* <<<< */                                                                                                                                                                                                                                                                                                                                                                                                   break;
+                       case  0: /* >>>> */
+                               VectorCopy(nodestart, nodestackline[nodestackpos]);
+                               VectorCopy(nodeend, nodestackline[nodestackpos] + 3);
+                               nodestack[nodestackpos++] = node->back;
+                               VectorCopy(nodestart, nodestackline[nodestackpos]);
+                               VectorCopy(nodeend, nodestackline[nodestackpos] + 3);
+                               nodestack[nodestackpos++] = node->front;
+                               break;
+                       case  1: /* <>>> */
+                               f = d1 / (d1 - d2);
+                               VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos]);
+                               VectorCopy(nodeend, nodestackline[nodestackpos] + 3);
+                               nodestack[nodestackpos++] = node->back;
+                               VectorCopy(nodestart, nodestackline[nodestackpos]);
+                               VectorCopy(nodeend, nodestackline[nodestackpos] + 3);
+                               nodestack[nodestackpos++] = node->front;
+                               break;
+                       case  2: /* ><>> */
+                               f = d1 / (d1 - d2);
+                               VectorCopy(nodestart, nodestackline[nodestackpos]);
+                               VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos] + 3);
+                               nodestack[nodestackpos++] = node->back;
+                               VectorCopy(nodestart, nodestackline[nodestackpos]);
+                               VectorCopy(nodeend, nodestackline[nodestackpos] + 3);
+                               nodestack[nodestackpos++] = node->front;
+                               break;
+                       case  3: /* <<>> */
+                               VectorCopy(nodestart, nodestackline[nodestackpos]);
+                               VectorCopy(nodeend, nodestackline[nodestackpos] + 3);
+                               nodestack[nodestackpos++] = node->front;
+                               break;
+                       case  4: /* >><> */
+                               VectorCopy(nodestart, nodestackline[nodestackpos]);
+                               VectorCopy(nodeend, nodestackline[nodestackpos] + 3);
+                               nodestack[nodestackpos++] = node->back;
+                               f = d3 / (d3 - d4);
+                               VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos]);
+                               VectorCopy(nodeend, nodestackline[nodestackpos] + 3);
+                               nodestack[nodestackpos++] = node->front;
+                               break;
+                       case  5: /* <><> */
+                               f = d1 / (d1 - d2);
+                               VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos]);
+                               VectorCopy(nodeend, nodestackline[nodestackpos] + 3);
+                               nodestack[nodestackpos++] = node->back;
+                               f = d3 / (d3 - d4);
+                               VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos]);
+                               VectorCopy(nodeend, nodestackline[nodestackpos] + 3);
+                               nodestack[nodestackpos++] = node->front;
+                               break;
+                       case  6: /* ><<> */
+                               f = d1 / (d1 - d2);
+                               VectorCopy(nodestart, nodestackline[nodestackpos]);
+                               VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos] + 3);
+                               nodestack[nodestackpos++] = node->back;
+                               f = d3 / (d3 - d4);
+                               VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos]);
+                               VectorCopy(nodeend, nodestackline[nodestackpos] + 3);
+                               nodestack[nodestackpos++] = node->front;
+                               break;
+                       case  7: /* <<<> */
+                               f = d3 / (d3 - d4);
+                               VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos]);
+                               VectorCopy(nodeend, nodestackline[nodestackpos] + 3);
+                               nodestack[nodestackpos++] = node->front;
+                               break;
+                       case  8: /* >>>< */
+                               VectorCopy(nodestart, nodestackline[nodestackpos]);
+                               VectorCopy(nodeend, nodestackline[nodestackpos] + 3);
+                               nodestack[nodestackpos++] = node->back;
+                               f = d3 / (d3 - d4);
+                               VectorCopy(nodestart, nodestackline[nodestackpos]);
+                               VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos] + 3);
+                               nodestack[nodestackpos++] = node->front;
+                               break;
+                       case  9: /* <>>< */
+                               f = d1 / (d1 - d2);
+                               VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos]);
+                               VectorCopy(nodeend, nodestackline[nodestackpos] + 3);
+                               nodestack[nodestackpos++] = node->back;
+                               f = d3 / (d3 - d4); VectorCopy(nodestart, nodestackline[nodestackpos]);
+                               VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos] + 3);
+                               nodestack[nodestackpos++] = node->front;
+                               break;
+                       case 10: /* ><>< */
+                               f = d1 / (d1 - d2);
+                               VectorCopy(nodestart, nodestackline[nodestackpos]);
+                               VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos] + 3);
+                               nodestack[nodestackpos++] = node->back;
+                               f = d3 / (d3 - d4);
+                               VectorCopy(nodestart, nodestackline[nodestackpos]);
+                               VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos] + 3);
+                               nodestack[nodestackpos++] = node->front;
+                               break;
+                       case 11: /* <<>< */
+                               f = d3 / (d3 - d4);
+                               VectorCopy(nodestart, nodestackline[nodestackpos]);
+                               VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos] + 3);
+                               nodestack[nodestackpos++] = node->front;
+                               break;
+                       case 12: /* >><< */
+                               VectorCopy(nodestart, nodestackline[nodestackpos]);
+                               VectorCopy(nodeend, nodestackline[nodestackpos] + 3);
+                               nodestack[nodestackpos++] = node->back;
+                               break;
+                       case 13: /* <><< */
+                               f = d1 / (d1 - d2);
+                               VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos]);
+                               VectorCopy(nodeend, nodestackline[nodestackpos] + 3);
+                               nodestack[nodestackpos++] = node->back;
+                               break;
+                       case 14: /* ><<< */
+                               f = d1 / (d1 - d2);
+                               VectorCopy(nodestart, nodestackline[nodestackpos]);
+                               VectorLerp(nodestart, f, nodeend, nodestackline[nodestackpos] + 3);
+                               nodestack[nodestackpos++] = node->back;
+                               break;
+                       case 15: /* <<<< */
+                               break;
                        }
                }
                else if (node->type == BIH_UNORDERED)