Hair Radius Is Actually Hair Diameter #70821

New Issue

James · 2019-10-14T23:27:49+02:00

James commented

2019-10-14 23:27:49 +02:00

2.80 Released

Testing hair radius. Set hair to one strand. Set radius 1m and scale to 1. Base of hair strand appears to be 1m in diameter. Is 1m radius not 2m in diameter?hair strand.blend

2.80 Released Testing hair radius. Set hair to one strand. Set radius 1m and scale to 1. Base of hair strand appears to be 1m in diameter. Is 1m radius not 2m in diameter?[hair strand.blend](https://archive.blender.org/developer/F7818289/hair_strand.blend)

James commented

2019-10-14 23:27:49 +02:00

Added subscriber: @James8569

Jacques Lucke commented

2019-10-15 10:34:15 +02:00

Added subscriber: @JacquesLucke

Jacques Lucke commented

2019-10-15 10:34:15 +02:00

When I try to render this file, I get a segfault. But that is unrelated to the issue you describe.

BKE_object_is_visible_in_viewport(const struct View3D * v3d, const struct Object * ob) (/home/jacques/blender-git/blender/source/blender/blenkernel/intern/layer.c:1068)
rna_Object_visible_in_viewport_get(Object * ob, View3D * v3d) (/home/jacques/blender-git/blender/source/blender/makesrna/intern/rna_object_api.c:289)
Object_visible_in_viewport_get_func(struct Object * _self, struct View3D * viewport) (/home/jacques/blender-git/build_linux_debug/source/blender/makesrna/intern/rna_object_gen.c:3153)
BL::Object::visible_in_viewport_get(BL::Object * const this, BL::SpaceView3D & viewport) (/home/jacques/blender-git/build_linux_debug/source/blender/makesrna/intern/RNA_blender_cpp.h:50291)
ccl::BlenderSync::sync_objects(ccl::BlenderSync * const this, BL::Depsgraph & b_depsgraph, BL::SpaceView3D & b_v3d, float motion_time) (/home/jacques/blender-git/blender/intern/cycles/blender/blender_object.cpp:558)
ccl::BlenderSync::sync_data(ccl::BlenderSync * const this, BL::RenderSettings & b_render, BL::Depsgraph & b_depsgraph, BL::SpaceView3D & b_v3d, BL::Object & b_override, int width, int height, void ** python_thread_state) (/home/jacques/blender-git/blender/intern/cycles/blender/blender_sync.cpp:218)
ccl::BlenderSession::render(ccl::BlenderSession * const this, BL::Depsgraph & b_depsgraph_) (/home/jacques/blender-git/blender/intern/cycles/blender/blender_session.cpp:526)
ccl::render_func(PyObject * args) (/home/jacques/blender-git/blender/intern/cycles/blender/blender_python.cpp:283)
libpython3.7m.so.1.0!_PyMethodDef_RawFastCallKeywords (Unknown Source:0)
libpython3.7m.so.1.0!_PyCFunction_FastCallKeywords (Unknown Source:0)
libpython3.7m.so.1.0![Unknown/Just-In-Time compiled code] (Unknown Source:0)
libpython3.7m.so.1.0!_PyEval_EvalFrameDefault (Unknown Source:0)
pydevd_frame_evaluator.cpython-37m-x86_64-linux-gnu.so!__pyx_f_18_pydevd_frame_eval_22pydevd_frame_evaluator_get_bytecode_while_frame_eval(PyFrameObject * __pyx_v_frame_obj, int __pyx_v_exc) (/io/ptvsd/src/ptvsd/_vendored/pydevd/_pydevd_frame_eval/pydevd_frame_evaluator.c:6404)
libpython3.7m.so.1.0![Unknown/Just-In-Time compiled code] (Unknown Source:0)
libpython3.7m.so.1.0!_PyEval_EvalFrameDefault (Unknown Source:0)
pydevd_frame_evaluator.cpython-37m-x86_64-linux-gnu.so!__pyx_f_18_pydevd_frame_eval_22pydevd_frame_evaluator_get_bytecode_while_frame_eval(PyFrameObject * __pyx_v_frame_obj, int __pyx_v_exc) (/io/ptvsd/src/ptvsd/_vendored/pydevd/_pydevd_frame_eval/pydevd_frame_evaluator.c:6404)
libpython3.7m.so.1.0![Unknown/Just-In-Time compiled code] (Unknown Source:0)
libpython3.7m.so.1.0!_PyFunction_FastCallDict (Unknown Source:0)
bpy_class_call(bContext * C, PointerRNA * ptr, FunctionRNA * func, ParameterList * parms) (/home/jacques/blender-git/blender/source/blender/python/intern/bpy_rna.c:8328)
engine_render(RenderEngine * engine, Depsgraph * depsgraph) (/home/jacques/blender-git/blender/source/blender/makesrna/intern/rna_render.c:170)
RE_engine_render(Render * re, int do_all) (/home/jacques/blender-git/blender/source/blender/render/intern/source/external_engine.c:778)
do_render_3d(Render * re) (/home/jacques/blender-git/blender/source/blender/render/intern/source/pipeline.c:1165)
do_render(Render * re) (/home/jacques/blender-git/blender/source/blender/render/intern/source/pipeline.c:1242)
do_render_composite(Render * re) (/home/jacques/blender-git/blender/source/blender/render/intern/source/pipeline.c:1463)
do_render_all_options(Render * re) (/home/jacques/blender-git/blender/source/blender/render/intern/source/pipeline.c:1726)
RE_RenderFrame(Render * re, Main * bmain, Scene * scene, ViewLayer * single_layer, Object * camera_override, int frame, const _Bool write_still) (/home/jacques/blender-git/blender/source/blender/render/intern/source/pipeline.c:2128)
render_startjob(void * rjv, short * stop, short * do_update, float * progress) (/home/jacques/blender-git/blender/source/blender/editors/render/render_internal.c:668)
do_job_thread(void * job_v) (/home/jacques/blender-git/blender/source/blender/windowmanager/intern/wm_jobs.c:383)
tslot_thread_start(void * tslot_p) (/home/jacques/blender-git/blender/source/blender/blenlib/intern/threads.c:260)
libpthread.so.0!start_thread(void * arg) (/build/glibc-4WA41p/glibc-2.30/nptl/pthread_create.c:479)
libc.so.6!clone() (/build/glibc-4WA41p/glibc-2.30/sysdeps/unix/sysv/linux/x86_64/clone.S:95)

When I try to render this file, I get a segfault. But that is unrelated to the issue you describe. ``` BKE_object_is_visible_in_viewport(const struct View3D * v3d, const struct Object * ob) (/home/jacques/blender-git/blender/source/blender/blenkernel/intern/layer.c:1068) rna_Object_visible_in_viewport_get(Object * ob, View3D * v3d) (/home/jacques/blender-git/blender/source/blender/makesrna/intern/rna_object_api.c:289) Object_visible_in_viewport_get_func(struct Object * _self, struct View3D * viewport) (/home/jacques/blender-git/build_linux_debug/source/blender/makesrna/intern/rna_object_gen.c:3153) BL::Object::visible_in_viewport_get(BL::Object * const this, BL::SpaceView3D & viewport) (/home/jacques/blender-git/build_linux_debug/source/blender/makesrna/intern/RNA_blender_cpp.h:50291) ccl::BlenderSync::sync_objects(ccl::BlenderSync * const this, BL::Depsgraph & b_depsgraph, BL::SpaceView3D & b_v3d, float motion_time) (/home/jacques/blender-git/blender/intern/cycles/blender/blender_object.cpp:558) ccl::BlenderSync::sync_data(ccl::BlenderSync * const this, BL::RenderSettings & b_render, BL::Depsgraph & b_depsgraph, BL::SpaceView3D & b_v3d, BL::Object & b_override, int width, int height, void ** python_thread_state) (/home/jacques/blender-git/blender/intern/cycles/blender/blender_sync.cpp:218) ccl::BlenderSession::render(ccl::BlenderSession * const this, BL::Depsgraph & b_depsgraph_) (/home/jacques/blender-git/blender/intern/cycles/blender/blender_session.cpp:526) ccl::render_func(PyObject * args) (/home/jacques/blender-git/blender/intern/cycles/blender/blender_python.cpp:283) libpython3.7m.so.1.0!_PyMethodDef_RawFastCallKeywords (Unknown Source:0) libpython3.7m.so.1.0!_PyCFunction_FastCallKeywords (Unknown Source:0) libpython3.7m.so.1.0![Unknown/Just-In-Time compiled code] (Unknown Source:0) libpython3.7m.so.1.0!_PyEval_EvalFrameDefault (Unknown Source:0) pydevd_frame_evaluator.cpython-37m-x86_64-linux-gnu.so!__pyx_f_18_pydevd_frame_eval_22pydevd_frame_evaluator_get_bytecode_while_frame_eval(PyFrameObject * __pyx_v_frame_obj, int __pyx_v_exc) (/io/ptvsd/src/ptvsd/_vendored/pydevd/_pydevd_frame_eval/pydevd_frame_evaluator.c:6404) libpython3.7m.so.1.0![Unknown/Just-In-Time compiled code] (Unknown Source:0) libpython3.7m.so.1.0!_PyEval_EvalFrameDefault (Unknown Source:0) pydevd_frame_evaluator.cpython-37m-x86_64-linux-gnu.so!__pyx_f_18_pydevd_frame_eval_22pydevd_frame_evaluator_get_bytecode_while_frame_eval(PyFrameObject * __pyx_v_frame_obj, int __pyx_v_exc) (/io/ptvsd/src/ptvsd/_vendored/pydevd/_pydevd_frame_eval/pydevd_frame_evaluator.c:6404) libpython3.7m.so.1.0![Unknown/Just-In-Time compiled code] (Unknown Source:0) libpython3.7m.so.1.0!_PyFunction_FastCallDict (Unknown Source:0) bpy_class_call(bContext * C, PointerRNA * ptr, FunctionRNA * func, ParameterList * parms) (/home/jacques/blender-git/blender/source/blender/python/intern/bpy_rna.c:8328) engine_render(RenderEngine * engine, Depsgraph * depsgraph) (/home/jacques/blender-git/blender/source/blender/makesrna/intern/rna_render.c:170) RE_engine_render(Render * re, int do_all) (/home/jacques/blender-git/blender/source/blender/render/intern/source/external_engine.c:778) do_render_3d(Render * re) (/home/jacques/blender-git/blender/source/blender/render/intern/source/pipeline.c:1165) do_render(Render * re) (/home/jacques/blender-git/blender/source/blender/render/intern/source/pipeline.c:1242) do_render_composite(Render * re) (/home/jacques/blender-git/blender/source/blender/render/intern/source/pipeline.c:1463) do_render_all_options(Render * re) (/home/jacques/blender-git/blender/source/blender/render/intern/source/pipeline.c:1726) RE_RenderFrame(Render * re, Main * bmain, Scene * scene, ViewLayer * single_layer, Object * camera_override, int frame, const _Bool write_still) (/home/jacques/blender-git/blender/source/blender/render/intern/source/pipeline.c:2128) render_startjob(void * rjv, short * stop, short * do_update, float * progress) (/home/jacques/blender-git/blender/source/blender/editors/render/render_internal.c:668) do_job_thread(void * job_v) (/home/jacques/blender-git/blender/source/blender/windowmanager/intern/wm_jobs.c:383) tslot_thread_start(void * tslot_p) (/home/jacques/blender-git/blender/source/blender/blenlib/intern/threads.c:260) libpthread.so.0!start_thread(void * arg) (/build/glibc-4WA41p/glibc-2.30/nptl/pthread_create.c:479) libc.so.6!clone() (/build/glibc-4WA41p/glibc-2.30/sysdeps/unix/sysv/linux/x86_64/clone.S:95) ```

Germano Cavalcante commented

2019-10-15 16:43:14 +02:00

Added subscriber: @mano-wii

William Reynish was assigned by Germano Cavalcante

2019-10-15 16:43:14 +02:00

Germano Cavalcante commented

2019-10-15 16:43:14 +02:00

I can confirm.
Radius is being diameter in this case.
In blender 2.79 it was called Thickness.

I can confirm. Radius is being diameter in this case. In blender 2.79 it was called Thickness.

James commented

2019-10-15 20:47:15 +02:00

What would be the impact of renaming it in the future?

James commented

2019-10-15 20:53:11 +02:00

Added subscriber: @jacques-3

James commented

2019-10-15 20:53:11 +02:00

This comment was removed by @James8569

*This comment was removed by @James8569*

James commented

2019-10-15 20:54:32 +02:00

@"Jacques Lucke (JacquesLucke)"

That's a bit of a worry. Which version of Blender did you use?

@"Jacques Lucke (JacquesLucke)" That's a bit of a worry. Which version of Blender did you use?

Philipp Oeser commented

2019-10-15 20:57:48 +02:00

Added subscriber: @lichtwerk

Philipp Oeser commented

2019-10-15 20:57:48 +02:00

The render segfault should be fixed already, see 7df7a8f3f1

The render segfault should be fixed already, see 7df7a8f3f1

C.G.Vedant commented

2019-11-14 21:43:06 +01:00

Added subscriber: @Chipe1

William Reynish was unassigned by Dalai Felinto

2019-12-23 13:46:59 +01:00

Dalai Felinto commented

2019-12-23 13:46:59 +01:00

Added subscriber: @WilliamReynish

James commented

2020-01-06 18:06:59 +01:00

I'm not sure anyone has looked into the actual issue here? In the file there is a 1x1m plane. In one corner (when rendered) there is a hair. The hair has a radius setting of 1 and a scale of 1 and should be 2 metres in diameter but it is 1 metre in diameter...