shithub: libgraphics

Download patch

ref: f2e5828b91c56c2fc0247c5feb5a7215ec4529cc
parent: 5a97a65584a9bdd97cd3399beff59c5ea5d9d4a9
author: rodri <rgl@antares-labs.eu>
date: Thu Feb 1 18:35:25 EST 2024 

only create existing indices during quad triangulation.


--- a/render.c
+++ b/render.c
@@ -39,19 +39,23 @@
 	newidxtab->indices[1] = idxtab->indices[1];
 	newidxtab->indices[2] = idxtab->indices[2];
 	idxtab = &e->indextab[OBJVTexture];
-	newidxtab = &newe[0]->indextab[OBJVTexture];
-	newidxtab->nindex = 3;
-	newidxtab->indices = emalloc(newidxtab->nindex*sizeof(*newidxtab->indices));
-	newidxtab->indices[0] = idxtab->indices[0];
-	newidxtab->indices[1] = idxtab->indices[1];
-	newidxtab->indices[2] = idxtab->indices[2];
+	if(idxtab->nindex > 0){
+		newidxtab = &newe[0]->indextab[OBJVTexture];
+		newidxtab->nindex = 3;
+		newidxtab->indices = emalloc(newidxtab->nindex*sizeof(*newidxtab->indices));
+		newidxtab->indices[0] = idxtab->indices[0];
+		newidxtab->indices[1] = idxtab->indices[1];
+		newidxtab->indices[2] = idxtab->indices[2];
+	}
 	idxtab = &e->indextab[OBJVNormal];
-	newidxtab = &newe[0]->indextab[OBJVNormal];
-	newidxtab->nindex = 3;
-	newidxtab->indices = emalloc(newidxtab->nindex*sizeof(*newidxtab->indices));
-	newidxtab->indices[0] = idxtab->indices[0];
-	newidxtab->indices[1] = idxtab->indices[1];
-	newidxtab->indices[2] = idxtab->indices[2];
+	if(idxtab->nindex > 0){
+		newidxtab = &newe[0]->indextab[OBJVNormal];
+		newidxtab->nindex = 3;
+		newidxtab->indices = emalloc(newidxtab->nindex*sizeof(*newidxtab->indices));
+		newidxtab->indices[0] = idxtab->indices[0];
+		newidxtab->indices[1] = idxtab->indices[1];
+		newidxtab->indices[2] = idxtab->indices[2];
+	}
 
 	idxtab = &e->indextab[OBJVGeometric];
 	newe[1] = emalloc(sizeof *newe[1]);
@@ -63,19 +67,23 @@
 	newidxtab->indices[1] = idxtab->indices[2];
 	newidxtab->indices[2] = idxtab->indices[3];
 	idxtab = &e->indextab[OBJVTexture];
-	newidxtab = &newe[1]->indextab[OBJVTexture];
-	newidxtab->nindex = 3;
-	newidxtab->indices = emalloc(newidxtab->nindex*sizeof(*newidxtab->indices));
-	newidxtab->indices[0] = idxtab->indices[0];
-	newidxtab->indices[1] = idxtab->indices[2];
-	newidxtab->indices[2] = idxtab->indices[3];
+	if(idxtab->nindex > 0){
+		newidxtab = &newe[1]->indextab[OBJVTexture];
+		newidxtab->nindex = 3;
+		newidxtab->indices = emalloc(newidxtab->nindex*sizeof(*newidxtab->indices));
+		newidxtab->indices[0] = idxtab->indices[0];
+		newidxtab->indices[1] = idxtab->indices[2];
+		newidxtab->indices[2] = idxtab->indices[3];
+	}
 	idxtab = &e->indextab[OBJVNormal];
-	newidxtab = &newe[1]->indextab[OBJVNormal];
-	newidxtab->nindex = 3;
-	newidxtab->indices = emalloc(newidxtab->nindex*sizeof(*newidxtab->indices));
-	newidxtab->indices[0] = idxtab->indices[0];
-	newidxtab->indices[1] = idxtab->indices[2];
-	newidxtab->indices[2] = idxtab->indices[3];
+	if(idxtab->nindex > 0){
+		newidxtab = &newe[1]->indextab[OBJVNormal];
+		newidxtab->nindex = 3;
+		newidxtab->indices = emalloc(newidxtab->nindex*sizeof(*newidxtab->indices));
+		newidxtab->indices[0] = idxtab->indices[0];
+		newidxtab->indices[1] = idxtab->indices[2];
+		newidxtab->indices[2] = idxtab->indices[3];
+	}
 
 	return 2;
 }