From 4ad103ceddd87ed36dac7f9fed4f1d058c6161b6 Mon Sep 17 00:00:00 2001 From: Brecht Van Lommel Date: Wed, 17 Oct 2012 17:27:30 +0000 Subject: Fix cycles motion blur not working correct with shutter time > 2.0. The soft limit is 2.0, and anything beyond that is extrapolation which might not work so well but is still allowed. --- intern/cycles/render/object.cpp | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) (limited to 'intern/cycles/render/object.cpp') diff --git a/intern/cycles/render/object.cpp b/intern/cycles/render/object.cpp index 63e904511e6..0b87a530725 100644 --- a/intern/cycles/render/object.cpp +++ b/intern/cycles/render/object.cpp @@ -51,7 +51,7 @@ Object::~Object() { } -void Object::compute_bounds(bool motion_blur) +void Object::compute_bounds(bool motion_blur, float shuttertime) { BoundBox mbounds = mesh->bounds; @@ -64,7 +64,10 @@ void Object::compute_bounds(bool motion_blur) /* todo: this is really terrible. according to pbrt there is a better * way to find this iteratively, but did not find implementation yet * or try to implement myself */ - for(float t = 0.0f; t < 1.0f; t += 1.0f/128.0f) { + float start_t = 0.5f - shuttertime*0.5f; + float end_t = 0.5f - shuttertime*0.5f; + + for(float t = start_t; t < end_t; t += (1.0f/128.0f)*shuttertime) { Transform ttfm; transform_motion_interpolate(&ttfm, &decomp, t); @@ -109,7 +112,7 @@ void Object::apply_transform() if(bounds.valid()) { mesh->compute_bounds(); - compute_bounds(false); + compute_bounds(false, 0.0f); } /* tfm is not reset to identity, all code that uses it needs to check the -- cgit v1.2.3