From 3408f2ce6af3deffd654bf0ac40ebacfff33c213 Mon Sep 17 00:00:00 2001
From: Shon Ferguson <shonferg@users.sourceforge.net>
Date: Sun, 25 Jun 2006 17:55:38 +0000
Subject: [PATCH] Removed automatic attempt to find natural bind pose. Added
ability to retrieve skin influenced vertex positions from NiTriBasedGeom.
---
niflib.cpp | 14 +++++-----
obj/NiTriBasedGeom.cpp | 63 ++++++++++++++++++++++++++++++++++++++++++
obj/NiTriBasedGeom.h | 4 +--
3 files changed, 72 insertions(+), 9 deletions(-)
diff --git a/niflib.cpp b/niflib.cpp
index 927b8808..0bca8729 100644
--- a/niflib.cpp
+++ b/niflib.cpp
@@ -274,13 +274,13 @@ vector<NiObjectRef> ReadNifList( istream & in ) {
}
//TODO: Make this an optional step?
- //Send all skeleton roots to bind position
- for (uint i = 0; i < blocks.size(); ++i) {
- NiNodeRef node = DynamicCast<NiNode>(blocks[i]);
- if ( node != NULL && node->IsSkeletonRoot() ) {
- node->GoToSkeletonBindPosition();
- }
- }
+ ////Send all skeleton roots to bind position
+ //for (uint i = 0; i < blocks.size(); ++i) {
+ // NiNodeRef node = DynamicCast<NiNode>(blocks[i]);
+ // if ( node != NULL && node->IsSkeletonRoot() ) {
+ // node->GoToSkeletonBindPosition();
+ // }
+ //}
//Return completed block list
return blocks;
diff --git a/obj/NiTriBasedGeom.cpp b/obj/NiTriBasedGeom.cpp
index 50db534b..ed34038c 100644
--- a/obj/NiTriBasedGeom.cpp
+++ b/obj/NiTriBasedGeom.cpp
@@ -89,4 +89,67 @@ void NiTriBasedGeom::BindSkin( Ref<NiNode> skeleton_root, vector< Ref<NiNode> >
void NiTriBasedGeom::UnbindSkin() {
//Clear skin instance
skinInstance = NULL;
+}
+
+vector<Vector3> NiTriBasedGeom::GetSkinInfluencedVertices() const {
+ //--Get required data & insure validity--//
+
+ NiTriBasedGeomDataRef geom_data = GetData();
+
+ if ( geom_data == NULL ) {
+ throw runtime_error("This NiTriBasedGeom has no NiTriBasedGeomData so there are no vertices to get.");
+ }
+
+ NiSkinInstanceRef skin_inst = GetSkinInstance();
+
+
+ if ( skin_inst == NULL ) {
+ throw runtime_error("This NiTriBasedGeom is not influenced by a skin.");
+ }
+
+ NiSkinDataRef skin_data = skin_inst->GetSkinData();
+
+ if ( skin_data == NULL ) {
+ throw runtime_error("Skin Data is missing, cannot calculate skin influenced vertex position.");
+ }
+
+ //Ensure that skin instance bone count & skin data bone count match
+ if ( skin_inst->GetBoneCount() != skin_data->GetBoneCount() ) {
+ throw runtime_error("Skin Instance and Skin Data bone count do not match.");
+ }
+
+ //Get skeleton root
+ NiNodeRef skel_root = skin_inst->GetSkeletonRoot();
+ if ( skel_root == NULL ) {
+ throw runtime_error("Skin Instance is not bound to a skeleton root.");
+ }
+
+ //Get the vertices & bone nodes
+ vector<Vector3> vertices = geom_data->GetVertices();
+ vector<NiNodeRef> bone_nodes = skin_inst->GetBones();
+
+ //Set up an aray to hold the transformed vertices
+ vector<Vector3> skin_verts( vertices.size());
+
+ //Transform vertices into position based on skin data
+ Matrix44 root_world = skel_root->GetWorldTransform();
+ Matrix44 geom_world = GetWorldTransform();
+ for ( uint i = 0; i < skin_data->GetBoneCount(); ++i ) {
+ Matrix44 bone_world = bone_nodes[i]->GetWorldTransform();
+ Matrix44 bone_offset = skin_data->GetBoneTransform(i);
+ vector<SkinWeight> weights = skin_data->GetBoneWeights(i);
+ Matrix44 vert_trans = bone_offset * bone_world;
+ for ( uint j = 0; j < weights.size(); ++j ) {
+ uint index = weights[j].index;
+ float weight = weights[j].weight;
+ skin_verts[index] += (vert_trans * vertices[index] ) * weight;
+ }
+ }
+
+ //Transform all vertices to final position
+ for ( uint i = 0; i < skin_verts.size(); ++i ) {
+ skin_verts[i] = geom_world.Inverse() * skin_verts[i];
+ }
+
+ return skin_verts;
}
\ No newline at end of file
diff --git a/obj/NiTriBasedGeom.h b/obj/NiTriBasedGeom.h
index 360d1512..b12c5be5 100644
--- a/obj/NiTriBasedGeom.h
+++ b/obj/NiTriBasedGeom.h
@@ -59,8 +59,8 @@ public:
string GetShader() const;
void SetShader( const string & n );
-
-
+ vector<Vector3> GetSkinInfluencedVertices() const;
+
protected:
NI_TRI_BASED_GEOM_MEMBERS
STANDARD_INTERNAL_METHODS
--
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