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, 2 insertions, 1 deletions

diff --git a/source/blender/draw/intern/draw_manager_texture.c b/source/blender/draw/intern/draw_manager_texture.c
index 8562a5ba8fb..a456aa9916e 100644
--- a/source/blender/draw/intern/draw_manager_texture.c
+++ b/source/blender/draw/intern/draw_manager_texture.c
@@ -112,7 +112,8 @@ GPUTexture *DRW_texture_create_3d(
     int w, int h, int d, eGPUTextureFormat format, DRWTextureFlag flags, const float *fpixels)
 {
   int mips = (flags & DRW_TEX_MIPMAP) ? 9999 : 1;
-  GPUTexture *tex = GPU_texture_create_3d(__func__, w, h, d, mips, format, fpixels);
+  GPUTexture *tex = GPU_texture_create_3d(
+      __func__, w, h, d, mips, format, GPU_DATA_FLOAT, fpixels);
   drw_texture_set_parameters(tex, flags);
 
   return tex;