diff options
| author | Luca Rood <dev@lucarood.com> | 2017-02-24 01:00:03 +0300 |
|---|---|---|
| committer | Luca Rood <dev@lucarood.com> | 2017-02-24 01:23:39 +0300 |
| commit | 4c164487bc15854834577f2867623a83db75ed60 (patch) | |
| tree | 43088b4c23c55aed38ea7f34c9caf743926a05c4 /source/blender | |
| parent | 29859d0d5e6c0365fc86570fc235120314c6a9a4 (diff) | |
Add "Gravitation" option to "Force" type force fields
This adds an option to force fields of type "Force", which enables the
simulation of gravitational behavior (dist^-2 falloff).
Patch by @AndreasE
Reviewers: #physics, LucaRood, mont29
Reviewed By: #physics, LucaRood, mont29
Tags: #physics
Differential Revision: https://developer.blender.org/D2389
Diffstat (limited to 'source/blender')
| -rw-r--r-- | source/blender/blenkernel/intern/effect.c | 8 | ||||
| -rw-r--r-- | source/blender/makesdna/DNA_object_force.h | 1 | ||||
| -rw-r--r-- | source/blender/makesrna/intern/rna_object_force.c | 7 |
3 files changed, 15 insertions, 1 deletions
diff --git a/source/blender/blenkernel/intern/effect.c b/source/blender/blenkernel/intern/effect.c index fe8f5ebdca6..4eee24b378f 100644 --- a/source/blender/blenkernel/intern/effect.c +++ b/source/blender/blenkernel/intern/effect.c @@ -848,6 +848,14 @@ static void do_physical_effector(EffectorCache *eff, EffectorData *efd, Effected break; case PFIELD_FORCE: normalize_v3(force); + if (pd->flag & PFIELD_GRAVITATION){ /* Option: Multiply by 1/distance^2 */ + if (efd->distance < FLT_EPSILON){ + strength = 0.0f; + } + else { + strength *= powf(efd->distance, -2.0f); + } + } mul_v3_fl(force, strength * efd->falloff); break; case PFIELD_VORTEX: diff --git a/source/blender/makesdna/DNA_object_force.h b/source/blender/makesdna/DNA_object_force.h index 59acefeffe4..ed14c4b9311 100644 --- a/source/blender/makesdna/DNA_object_force.h +++ b/source/blender/makesdna/DNA_object_force.h @@ -372,6 +372,7 @@ typedef struct SoftBody { #define PFIELD_DO_ROTATION (1<<15) #define PFIELD_GUIDE_PATH_WEIGHT (1<<16) /* apply curve weights */ #define PFIELD_SMOKE_DENSITY (1<<17) /* multiply smoke force by density */ +#define PFIELD_GRAVITATION (1<<18) /* used for (simple) force */ /* pd->falloff */ #define PFIELD_FALL_SPHERE 0 diff --git a/source/blender/makesrna/intern/rna_object_force.c b/source/blender/makesrna/intern/rna_object_force.c index 1d89f7535c4..514fca1b011 100644 --- a/source/blender/makesrna/intern/rna_object_force.c +++ b/source/blender/makesrna/intern/rna_object_force.c @@ -1275,7 +1275,7 @@ static void rna_def_field(BlenderRNA *brna) prop = RNA_def_property(srna, "falloff_power", PROP_FLOAT, PROP_NONE); RNA_def_property_float_sdna(prop, NULL, "f_power"); RNA_def_property_range(prop, 0.0f, 10.0f); - RNA_def_property_ui_text(prop, "Falloff Power", "Falloff power (real gravitational falloff = 2)"); + RNA_def_property_ui_text(prop, "Falloff Power", ""); RNA_def_property_update(prop, 0, "rna_FieldSettings_update"); prop = RNA_def_property(srna, "distance_min", PROP_FLOAT, PROP_NONE); @@ -1394,6 +1394,11 @@ static void rna_def_field(BlenderRNA *brna) RNA_def_property_boolean_sdna(prop, NULL, "flag", PFIELD_SMOKE_DENSITY); RNA_def_property_ui_text(prop, "Apply Density", "Adjust force strength based on smoke density"); RNA_def_property_update(prop, 0, "rna_FieldSettings_update"); + prop = RNA_def_property(srna, "use_gravity_falloff", PROP_BOOLEAN, PROP_NONE); + RNA_def_property_boolean_sdna(prop, NULL, "flag", PFIELD_GRAVITATION); + RNA_def_property_ui_text(prop, "Gravity Falloff", "Multiply force by 1/distance²"); + RNA_def_property_update(prop, 0, "rna_FieldSettings_update"); + /* Pointer */ |