Liquid Simulation Display Options (GSoC 2020)

All the changes made in the branch `soc-2020-fluid-tools` are included in this patch.

**Major changes:**

=== Viewport Display ===

- //Raw voxel display// or //closest (nearest-neighbor)// interpolation for displaying the underlying voxel data of the simulation grids more clearly.
- An option to display //gridlines// when the slicing method is //single//.

==== Grid Display ====

- Visualization for flags, pressure and level-set representation grids with a fixed color coding based on Manta GUI.

==== Vector Display ====

- //**M**arker **A**nd **C**ell// grid visualization options for vector grids like velocity or external forces.
- Made vector display options available for external forces.

==== Coloring options for //gridlines// ====

- Range highlighting and cell filtering options for displaying the simulation grid data more precisely.
- Color gridlines with flags.

- Also, made slicing and interpolation options available for Volume Object.

Reviewed By: JacquesLucke, sebbas

Differential Revision: https://developer.blender.org/D8705

1 files changed, 1 insertions, 1 deletions

diff --git a/source/blender/draw/intern/draw_cache_impl_volume.c b/source/blender/draw/intern/draw_cache_impl_volume.c
index 10b9623175c..e39c4976e38 100644
--- a/source/blender/draw/intern/draw_cache_impl_volume.c
+++ b/source/blender/draw/intern/draw_cache_impl_volume.c
@@ -260,7 +260,7 @@ static DRWVolumeGrid *volume_grid_cache_get(Volume *volume,
     /* Create GPU texture. */
     eGPUTextureFormat format = (channels == 3) ? GPU_RGB16F : GPU_R16F;
     cache_grid->texture = GPU_texture_create_3d(
-        "volume_grid", UNPACK3(resolution), 1, format, voxels);
+        "volume_grid", UNPACK3(resolution), 1, format, GPU_DATA_FLOAT, voxels);
 
     GPU_texture_swizzle_set(cache_grid->texture, (channels == 3) ? "rgb1" : "rrr1");
     GPU_texture_wrap_mode(cache_grid->texture, false, false);