Patch #30050 by Juha Mäki-Kanto (kanttori)

Fixes for Collada exporter.
Adds Second Life compatibility for armatures
Adds objects parentinverse to exported transform if it's non-identity
Fix mismatch between add_inv_bind_mats and add_joints_source accessor counts
Fix bone exports in world space should be local space

8 files changed, 99 insertions, 11 deletions

diff --git a/source/blender/collada/AnimationExporter.cpp b/source/blender/collada/AnimationExporter.cpp
index 7b57ed243a1..c2d8c356aae 100644
--- a/source/blender/collada/AnimationExporter.cpp
+++ b/source/blender/collada/AnimationExporter.cpp
@@ -773,6 +773,27 @@ std::string AnimationExporter::create_4x4_source(std::vector<float> &frames , Ob
 			copy_m4_m4(mat, pchan->pose_mat);
 		UnitConverter converter;
 
+		// SECOND_LIFE_COMPATIBILITY
+		// AFAIK animation to second life is via BVH, but no
+		// reason to not have the collada-animation be correct
+		if(export_settings->second_life)
+		{
+			float temp[4][4];
+			copy_m4_m4(temp, bone->arm_mat);
+			temp[3][0] = temp[3][1] = temp[3][2] = 0.0f;
+			invert_m4(temp);
+
+			mult_m4_m4m4(mat, mat, temp);
+
+			if(bone->parent)
+			{
+				copy_m4_m4(temp, bone->parent->arm_mat);
+				temp[3][0] = temp[3][1] = temp[3][2] = 0.0f;
+
+				mult_m4_m4m4(mat, temp, mat);
+			}
+		}
+
 		float outmat[4][4];
 		converter.mat4_to_dae(outmat,mat);
 
diff --git a/source/blender/collada/AnimationExporter.h b/source/blender/collada/AnimationExporter.h
index c3a5c7a5383..ba7ec6859cc 100644
--- a/source/blender/collada/AnimationExporter.h
+++ b/source/blender/collada/AnimationExporter.h
@@ -83,7 +83,9 @@ private:
 
 public:
 
-	AnimationExporter(COLLADASW::StreamWriter *sw): COLLADASW::LibraryAnimations(sw) { this->sw = sw; }
+	AnimationExporter(COLLADASW::StreamWriter *sw, const ExportSettings *export_settings):
+			COLLADASW::LibraryAnimations(sw), export_settings(export_settings)
+			{ this->sw = sw; }
 	
 
 	void exportAnimations(Scene *sce);
@@ -92,6 +94,7 @@ public:
 	void operator() (Object *ob); 
 	
 protected:
+	const ExportSettings *export_settings;
 
 	void dae_animation(Object* ob, FCurve *fcu, char* transformName , bool is_param, Material *ma = NULL);
 
diff --git a/source/blender/collada/ArmatureExporter.cpp b/source/blender/collada/ArmatureExporter.cpp
index fcfc197ce80..0e89f2db74b 100644
--- a/source/blender/collada/ArmatureExporter.cpp
+++ b/source/blender/collada/ArmatureExporter.cpp
@@ -221,8 +221,31 @@ void ArmatureExporter::add_bone_transform(Object *ob_arm, Bone *bone, COLLADASW:
 		mult_m4_m4m4(mat, invpar, pchan->pose_mat);
 	}
 	else {
-		// get world-space from armature-space
-		mult_m4_m4m4(mat, ob_arm->obmat, pchan->pose_mat);
+		copy_m4_m4(mat, pchan->pose_mat);
+		// Why? Joint's localspace is still it's parent node
+		//get world-space from armature-space
+		//mult_m4_m4m4(mat, ob_arm->obmat, pchan->pose_mat);
+	}
+
+	// SECOND_LIFE_COMPATIBILITY
+	if(export_settings->second_life)
+	{
+		// Remove rotations vs armature from transform
+		// parent_rest_rot * mat * irest_rot
+		float temp[4][4];
+		copy_m4_m4(temp, bone->arm_mat);
+		temp[3][0] = temp[3][1] = temp[3][2] = 0.0f;
+		invert_m4(temp);
+
+		mult_m4_m4m4(mat, mat, temp);
+
+		if(bone->parent)
+		{
+			copy_m4_m4(temp, bone->parent->arm_mat);
+			temp[3][0] = temp[3][1] = temp[3][2] = 0.0f;
+
+			mult_m4_m4m4(mat, temp, mat);
+		}
 	}
 
 	TransformWriter::add_node_transform(node, mat,NULL );
@@ -341,10 +364,16 @@ std::string ArmatureExporter::add_inv_bind_mats_source(Object *ob_arm, ListBase
 {
 	std::string source_id = controller_id + BIND_POSES_SOURCE_ID_SUFFIX;
 
+	int totjoint = 0;
+	for (bDeformGroup *def = (bDeformGroup*)defbase->first; def; def = def->next) {
+		if (is_bone_defgroup(ob_arm, def))
+			totjoint++;
+	}
+
 	COLLADASW::FloatSourceF source(mSW);
 	source.setId(source_id);
 	source.setArrayId(source_id + ARRAY_ID_SUFFIX);
-	source.setAccessorCount(BLI_countlist(defbase));
+	source.setAccessorCount(totjoint); //BLI_countlist(defbase));
 	source.setAccessorStride(16);
 	
 	source.setParameterTypeName(&COLLADASW::CSWC::CSW_VALUE_TYPE_FLOAT4x4);
@@ -366,16 +395,27 @@ std::string ArmatureExporter::add_inv_bind_mats_source(Object *ob_arm, ListBase
 
 	for (bDeformGroup *def = (bDeformGroup*)defbase->first; def; def = def->next) {
 		if (is_bone_defgroup(ob_arm, def)) {
-
 			bPoseChannel *pchan = get_pose_channel(pose, def->name);
 
 			float mat[4][4];
 			float world[4][4];
 			float inv_bind_mat[4][4];
 
-			// make world-space matrix, arm_mat is armature-space
-			mult_m4_m4m4(world, ob_arm->obmat, pchan->bone->arm_mat);
-			
+			// SECOND_LIFE_COMPATIBILITY
+			if(export_settings->second_life)
+			{
+				// Only translations, no rotation vs armature
+				float temp[4][4];
+				unit_m4(temp);
+				copy_v3_v3(temp[3], pchan->bone->arm_mat[3]);
+				mult_m4_m4m4(world, ob_arm->obmat, temp);
+			}
+			else
+			{
+				// make world-space matrix, arm_mat is armature-space
+				mult_m4_m4m4(world, ob_arm->obmat, pchan->bone->arm_mat);
+			}
+
 			invert_m4_m4(mat, world);
 			converter.mat4_to_dae(inv_bind_mat, mat);
 
diff --git a/source/blender/collada/DocumentExporter.cpp b/source/blender/collada/DocumentExporter.cpp
index 6e8abc08358..6e04a1773bb 100644
--- a/source/blender/collada/DocumentExporter.cpp
+++ b/source/blender/collada/DocumentExporter.cpp
@@ -257,7 +257,7 @@ void DocumentExporter::exportCurrentScene(Scene *sce)
 	}
 
 	// <library_animations>
-	AnimationExporter ae(&sw);
+	AnimationExporter ae(&sw, this->export_settings);
 	ae.exportAnimations(sce);
 
 	// <library_controllers>
diff --git a/source/blender/collada/ExportSettings.h b/source/blender/collada/ExportSettings.h
index 1ad7c8c370e..80e20acbe48 100644
--- a/source/blender/collada/ExportSettings.h
+++ b/source/blender/collada/ExportSettings.h
@@ -31,6 +31,7 @@ struct ExportSettings
 {
  public:
  bool selected;
+ bool second_life;
  char *filepath;
 };
 
diff --git a/source/blender/collada/TransformWriter.cpp b/source/blender/collada/TransformWriter.cpp
index 379a0619040..a2bca6733e1 100644
--- a/source/blender/collada/TransformWriter.cpp
+++ b/source/blender/collada/TransformWriter.cpp
@@ -59,6 +59,7 @@ void TransformWriter::add_node_transform(COLLADASW::Node& node, float mat[][4],
 
 void TransformWriter::add_node_transform_ob(COLLADASW::Node& node, Object *ob)
 {
+	/*
 	float rot[3], loc[3], scale[3];
 
 	if (ob->parent) {
@@ -91,6 +92,27 @@ void TransformWriter::add_node_transform_ob(COLLADASW::Node& node, Object *ob)
 	}
 
 	add_transform(node, loc, rot, scale);
+	*/
+
+	/* Using parentinv should allow use of existing curves */
+	// If parentinv is identity don't add it.
+	bool add_parinv = false;
+	for(int i = 0; i < 16; ++i)
+	{
+		float f = (i%4 == i/4) ? 1.0f : 0.0f ;
+		if(ob->parentinv[i%4][i/4] != f) add_parinv = true;
+	}
+
+	// Eat this 3ds Max et friends
+	if(add_parinv)
+	{
+		double dmat[4][4];
+		UnitConverter converter;
+		converter.mat4_to_dae_double(dmat, ob->parentinv);
+		node.addMatrix("parentinverse", dmat);
+	}
+
+	add_transform(node, ob->loc, ob->rot, ob->size);
 }
 
 void TransformWriter::add_node_transform_identity(COLLADASW::Node& node)
diff --git a/source/blender/collada/collada.cpp b/source/blender/collada/collada.cpp
index 0731faceeed..39114f6543b 100644
--- a/source/blender/collada/collada.cpp
+++ b/source/blender/collada/collada.cpp
@@ -49,11 +49,12 @@ extern "C"
 		return 0;
 	}
 
-	int collada_export(Scene *sce, const char *filepath, int selected)
+	int collada_export(Scene *sce, const char *filepath, int selected, int second_life)
 	{
 		ExportSettings export_settings;
 		
 		export_settings.selected = selected != 0;
+		export_settings.second_life = second_life != 0;
 		export_settings.filepath = (char *)filepath;
 
 		/* annoying, collada crashes if file cant be created! [#27162] */
diff --git a/source/blender/collada/collada.h b/source/blender/collada/collada.h
index b86f37b7af6..161977368db 100644
--- a/source/blender/collada/collada.h
+++ b/source/blender/collada/collada.h
@@ -37,7 +37,7 @@ extern "C" {
 	 * both return 1 on success, 0 on error
 	 */
 	int collada_import(bContext *C, const char *filepath);
-	int collada_export(Scene *sce, const char *filepath, int selected);
+	int collada_export(Scene *sce, const char *filepath, int selected, int second_life);
 #ifdef __cplusplus
 }
 #endif