X-Git-Url: http://git.mutantstargoat.com/user/nuclear/?p=dosdemo;a=blobdiff_plain;f=src%2Fbsptree.c;h=cd8e356e4b31aad667a56dbace820aad69acec1e;hp=30f67eff08fb3d87eca861a91a10bb1ab60fdddd;hb=77e0a84543a31aecceabc0e4b18a0d37ad92c89b;hpb=45f6f46fe758d15aafccdb69ae837fc7d84ee466

diff --git a/src/bsptree.c b/src/bsptree.c
index 30f67ef..cd8e356 100644
--- a/src/bsptree.c
+++ b/src/bsptree.c
@@ -2,11 +2,17 @@
 #include <stdlib.h>
 #include <string.h>
 #include <assert.h>
+#if defined(__WATCOMC__) || defined(_MSC_VER) || defined(__DJGPP__)
+#include <malloc.h>
+#else
+#include <alloca.h>
+#endif
 #include "bsptree.h"
 #include "dynarr.h"
 #include "inttypes.h"
 #include "polyclip.h"
 #include "vmath.h"
+#include "util.h"
 
 struct bspfile_header {
 	char magic[4];
@@ -239,6 +245,26 @@ static struct bspnode *add_poly_tree(struct bspnode *n, struct g3d_vertex *v, in
 	return n;
 }
 
+#undef DRAW_NGONS
+
+#ifndef DRAW_NGONS
+static void debug_draw_poly(struct g3d_vertex *varr, int vcount)
+{
+	int i, nfaces = vcount - 2;
+	int vbuf_size = nfaces * 3;
+	struct g3d_vertex *vbuf = alloca(vbuf_size * sizeof *vbuf);
+	struct g3d_vertex *vptr = varr + 1;
+
+	for(i=0; i<nfaces; i++) {
+		vbuf[i * 3] = varr[0];
+		vbuf[i * 3 + 1] = *vptr++;
+		vbuf[i * 3 + 2] = *vptr;
+	}
+
+	g3d_draw_indexed(G3D_TRIANGLES, vbuf, vbuf_size, 0, 0);
+}
+#endif
+
 static void draw_bsp_tree(struct bspnode *n, const vec3_t *vdir)
 {
 	float dot;
@@ -248,11 +274,19 @@ static void draw_bsp_tree(struct bspnode *n, const vec3_t *vdir)
 	dot = vdir->x * n->plane.nx + vdir->y * n->plane.ny + vdir->z * n->plane.nz;
 	if(dot >= 0.0f) {
 		draw_bsp_tree(n->front, vdir);
+#ifdef DRAW_NGONS
 		g3d_draw_indexed(n->vcount, n->verts, n->vcount, 0, 0);
+#else
+		debug_draw_poly(n->verts, n->vcount);
+#endif
 		draw_bsp_tree(n->back, vdir);
 	} else {
 		draw_bsp_tree(n->back, vdir);
+#ifdef DRAW_NGONS
 		g3d_draw_indexed(n->vcount, n->verts, n->vcount, 0, 0);
+#else
+		debug_draw_poly(n->verts, n->vcount);
+#endif
 		draw_bsp_tree(n->front, vdir);
 	}
 }