Objects: Eevee and workbench rendering of new Volume, Hair, PointCloud

Only the volume drawing part is really finished and exposed to the user. Hair
plugs into the existing hair rendering code and is fairly straightforward. The
pointcloud drawing is a hack using overlays rather than Eevee and workbench.

The most tricky part for volume rendering is the case where each volume grid
has a different transform, which requires an additional matrix in the shader
and non-trivial logic in Eevee volume drawing. In the common case were all the
transforms match we don't use the additional per-grid matrix in the shader.

Ref T73201, T68981

Differential Revision: https://developer.blender.org/D6955

1 files changed, 10 insertions, 6 deletions

diff --git a/source/blender/draw/intern/draw_cache_impl_displist.c b/source/blender/draw/intern/draw_cache_impl_displist.c
index 50979d72189..bc4eb37c3b4 100644
--- a/source/blender/draw/intern/draw_cache_impl_displist.c
+++ b/source/blender/draw/intern/draw_cache_impl_displist.c
@@ -214,7 +214,7 @@ void DRW_displist_vertbuf_create_pos_and_nor(ListBase *lb, GPUVertBuf *vbo)
   }
 }
 
-void DRW_displist_vertbuf_create_wiredata(ListBase *lb, GPUVertBuf *vbo)
+void DRW_vertbuf_create_wiredata(GPUVertBuf *vbo, const int vert_len)
 {
   static GPUVertFormat format = {0};
   static struct {
@@ -232,23 +232,27 @@ void DRW_displist_vertbuf_create_wiredata(ListBase *lb, GPUVertBuf *vbo)
     }
   }
 
-  int vbo_len_used = curve_render_surface_vert_len_get(lb);
-
   GPU_vertbuf_init_with_format(vbo, &format);
-  GPU_vertbuf_data_alloc(vbo, vbo_len_used);
+  GPU_vertbuf_data_alloc(vbo, vert_len);
 
   if (vbo->format.stride == 1) {
-    memset(vbo->data, 0xFF, (size_t)vbo_len_used);
+    memset(vbo->data, 0xFF, (size_t)vert_len);
   }
   else {
     GPUVertBufRaw wd_step;
     GPU_vertbuf_attr_get_raw_data(vbo, attr_id.wd, &wd_step);
-    for (int i = 0; i < vbo_len_used; i++) {
+    for (int i = 0; i < vert_len; i++) {
       *((float *)GPU_vertbuf_raw_step(&wd_step)) = 1.0f;
     }
   }
 }
 
+void DRW_displist_vertbuf_create_wiredata(ListBase *lb, GPUVertBuf *vbo)
+{
+  const int vert_len = curve_render_surface_vert_len_get(lb);
+  DRW_vertbuf_create_wiredata(vbo, vert_len);
+}
+
 void DRW_displist_indexbuf_create_triangles_in_order(ListBase *lb, GPUIndexBuf *ibo)
 {
   const int tri_len = curve_render_surface_tri_len_get(lb);