Cr8-xyz/blender
1
0
Fork 0
Code Issues Pull Requests Actions 1 Packages Projects Releases Wiki Activity

Cycles: optimizations for instances in scene updates before render starts,

Browse Source 
should load a non-trivial mesh instanced many times quite a bit faster now.
This commit is contained in:
Brecht Van Lommel
2011-09-02 16:15:18 +00:00
parent 1135875ab1
commit 67030aaf84
4 changed files with 107 additions and 28 deletions
Download Patch File Download Diff File Expand all files Collapse all files

41
intern/cycles/render/object.cpp
View File

@@ -22,6 +22,7 @@
#include "scene.h"
#include "util_foreach.h"
#include "util_map.h"
#include "util_progress.h"
CCL_NAMESPACE_BEGIN
@@ -103,6 +104,7 @@ void ObjectManager::device_update_transforms(Device *device, DeviceScene *dscene
{
float4 *objects = dscene->objects.resize(OBJECT_SIZE*scene->objects.size());
int i = 0;
map<Mesh*, float> surface_area_map;
foreach(Object *ob, scene->objects) {
Mesh *mesh = ob->mesh;
@@ -112,16 +114,39 @@ void ObjectManager::device_update_transforms(Device *device, DeviceScene *dscene
Transform itfm = transform_inverse(tfm);
Transform ntfm = transform_transpose(itfm);
/* compute surface area */
/* compute surface area. for uniform scale we can do avoid the many
transform calls and share computation for instances */
/* todo: correct for displacement, and move to a better place */
float surfacearea = 0.0f;
float uniform_scale;
float surface_area = 0.0f;
if(transform_uniform_scale(tfm, uniform_scale)) {
map<Mesh*, float>::iterator it = surface_area_map.find(mesh);
foreach(Mesh::Triangle& t, mesh->triangles) {
float3 p1 = transform(&tfm, mesh->verts[t.v[0]]);
float3 p2 = transform(&tfm, mesh->verts[t.v[1]]);
float3 p3 = transform(&tfm, mesh->verts[t.v[2]]);
if(it == surface_area_map.end()) {
foreach(Mesh::Triangle& t, mesh->triangles) {
float3 p1 = mesh->verts[t.v[0]];
float3 p2 = mesh->verts[t.v[1]];
float3 p3 = mesh->verts[t.v[2]];
surfacearea += triangle_area(p1, p2, p3);
surface_area += triangle_area(p1, p2, p3);
}
surface_area_map[mesh] = surface_area;
}
else
surface_area = it->second;
surface_area *= uniform_scale;
}
else {
foreach(Mesh::Triangle& t, mesh->triangles) {
float3 p1 = transform(&tfm, mesh->verts[t.v[0]]);
float3 p2 = transform(&tfm, mesh->verts[t.v[1]]);
float3 p3 = transform(&tfm, mesh->verts[t.v[2]]);
surface_area += triangle_area(p1, p2, p3);
}
}
/* pack in texture */
@@ -130,7 +155,7 @@ void ObjectManager::device_update_transforms(Device *device, DeviceScene *dscene
memcpy(&objects[offset], &tfm, sizeof(float4)*4);
memcpy(&objects[offset+4], &itfm, sizeof(float4)*4);
memcpy(&objects[offset+8], &ntfm, sizeof(float4)*4);
objects[offset+12] = make_float4(surfacearea, 0.0f, 0.0f, 0.0f);
objects[offset+12] = make_float4(surface_area, 0.0f, 0.0f, 0.0f);
i++;