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Fix cycles motion blur not working correct with shutter time > 2.0. The soft

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limit is 2.0, and anything beyond that is extrapolation which might not work
so well but is still allowed.
This commit is contained in:
Brecht Van Lommel 2012-10-17 17:27:30 +00:00
parent 11908552db
commit 4ad103cedd
3 changed files with 10 additions and 5 deletions
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4
intern/cycles/render/mesh.cpp
View File

@ -19,6 +19,7 @@
#include "bvh.h"
#include "bvh_build.h"
#include "camera.h"
#include "device.h"
#include "shader.h"
#include "light.h"
@ -722,6 +723,7 @@ void MeshManager::device_update(Device *device, DeviceScene *dscene, Scene *scen
foreach(Shader *shader, scene->shaders)
shader->need_update_attributes = false;
float shuttertime = scene->camera->shuttertime;
#ifdef __OBJECT_MOTION__
Scene::MotionType need_motion = scene->need_motion(device->info.advanced_shading);
bool motion_blur = need_motion == Scene::MOTION_BLUR;
@ -730,7 +732,7 @@ void MeshManager::device_update(Device *device, DeviceScene *dscene, Scene *scen
#endif
foreach(Object *object, scene->objects)
object->compute_bounds(motion_blur);
object->compute_bounds(motion_blur, shuttertime);
if(progress.get_cancel()) return;

9
intern/cycles/render/object.cpp
View File

@ -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

2
intern/cycles/render/object.h
View File

@ -59,7 +59,7 @@ public:
void tag_update(Scene *scene);
void compute_bounds(bool motion_blur);
void compute_bounds(bool motion_blur, float shuttertime);
void apply_transform();
};