diff options
Diffstat (limited to 'source/blender/draw/engines/gpencil/gpencil_draw_cache_impl.c')
| -rw-r--r-- | source/blender/draw/engines/gpencil/gpencil_draw_cache_impl.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/source/blender/draw/engines/gpencil/gpencil_draw_cache_impl.c b/source/blender/draw/engines/gpencil/gpencil_draw_cache_impl.c index b72a6ebebbd..3bcc963c966 100644 --- a/source/blender/draw/engines/gpencil/gpencil_draw_cache_impl.c +++ b/source/blender/draw/engines/gpencil/gpencil_draw_cache_impl.c @@ -95,6 +95,7 @@ void DRW_gpencil_get_point_geom(GpencilBatchCacheElem *be, bGPDstroke *gps, shor be->color_id = GPU_vertformat_attr_add(&be->format, "color", GPU_COMP_F32, 4, GPU_FETCH_FLOAT); be->thickness_id = GPU_vertformat_attr_add(&be->format, "thickness", GPU_COMP_F32, 1, GPU_FETCH_FLOAT); be->uvdata_id = GPU_vertformat_attr_add(&be->format, "uvdata", GPU_COMP_F32, 2, GPU_FETCH_FLOAT); + be->prev_pos_id = GPU_vertformat_attr_add(&be->format, "prev_pos", GPU_COMP_F32, 3, GPU_FETCH_FLOAT); be->vbo = GPU_vertbuf_create_with_format(&be->format); GPU_vertbuf_data_alloc(be->vbo, be->tot_vertex); @@ -123,6 +124,26 @@ void DRW_gpencil_get_point_geom(GpencilBatchCacheElem *be, bGPDstroke *gps, shor GPU_vertbuf_attr_set(be->vbo, be->uvdata_id, be->vbo_len, uvdata); GPU_vertbuf_attr_set(be->vbo, be->pos_id, be->vbo_len, &pt->x); + + /* use previous point to determine stroke direction */ + bGPDspoint *pt2 = NULL; + if (i == 0) { + if (gps->totpoints > 1) { + /* extrapolate a point before first point */ + float fpt[3]; + pt2 = &gps->points[1]; + interp_v3_v3v3(fpt, &pt2->x, &pt->x, 1.5f); + GPU_vertbuf_attr_set(be->vbo, be->prev_pos_id, be->vbo_len, fpt); + } + else { + GPU_vertbuf_attr_set(be->vbo, be->prev_pos_id, be->vbo_len, &pt->x); + } + } + else { + pt2 = &gps->points[i - 1]; + GPU_vertbuf_attr_set(be->vbo, be->prev_pos_id, be->vbo_len, &pt2->x); + } + be->vbo_len++; } } |