theoretically added texture matrices. untested.

[dosdemo] / src / 3dgfx.c

diff --git a/src/3dgfx.c b/src/3dgfx.c
index c852736..083f507 100644 (file)
--- a/src/3dgfx.c
+++ b/src/3dgfx.c
@@ -442,6 +442,14 @@ void g3d_draw_indexed(int prim, const struct g3d_vertex *varr, int varr_size,
                                v[i].u = v[i].nx * 0.5 + 0.5;
                                v[i].v = v[i].ny * 0.5 + 0.5;
                        }
+                       if(st->opt & G3D_TEXTURE_MAT) {
+                               float *mat = st->mat[G3D_TEXTURE][st->mtop[G3D_TEXTURE]];
+                               float x = mat[0] * v[i].u + mat[4] * v[i].v + mat[12];
+                               float y = mat[1] * v[i].u + mat[5] * v[i].v + mat[13];
+                               float w = mat[3] * v[i].u + mat[7] * v[i].v + mat[15];
+                               v[i].u = x / w;
+                               v[i].v = y / w;
+                       }
                        xform4_vec3(st->mat[G3D_PROJECTION][ptop], &v[i].x);
                }