/**
* SetToTransformFunction is essentially a giant switch statement that fans
* out to many smaller helper functions.
*/
void
nsStyleTransformMatrix::SetToTransformFunction(const nsCSSValue::Array * aData,
nsStyleContext* aContext,
nsPresContext* aPresContext,
PRBool& aCanStoreInRuleTree)
{
NS_PRECONDITION(aData, "Why did you want to get data from a null array?");
NS_PRECONDITION(aContext, "Need a context for unit conversion!");
NS_PRECONDITION(aPresContext, "Need a context for unit conversion!");
/* Reset the matrix to the identity so that each subfunction can just
* worry about its own components.
*/
SetToIdentity();
/* Get the keyword for the transform. */
nsAutoString keyword;
aData->Item(0).GetStringValue(keyword);
switch (nsCSSKeywords::LookupKeyword(keyword)) {
case eCSSKeyword_translatex:
ProcessTranslateX(mDelta, mX, aData, aContext, aPresContext,
aCanStoreInRuleTree);
break;
case eCSSKeyword_translatey:
ProcessTranslateY(mDelta, mY, aData, aContext, aPresContext,
aCanStoreInRuleTree);
break;
case eCSSKeyword_translate:
ProcessTranslate(mDelta, mX, mY, aData, aContext, aPresContext,
aCanStoreInRuleTree);
break;
case eCSSKeyword_scalex:
ProcessScaleX(mMain, aData);
break;
case eCSSKeyword_scaley:
ProcessScaleY(mMain, aData);
break;
case eCSSKeyword_scale:
ProcessScale(mMain, aData);
break;
case eCSSKeyword_skewx:
ProcessSkewX(mMain, aData);
break;
case eCSSKeyword_skewy:
ProcessSkewY(mMain, aData);
break;
case eCSSKeyword_skew:
ProcessSkew(mMain, aData);
break;
case eCSSKeyword_rotate:
ProcessRotate(mMain, aData);
break;
case eCSSKeyword_matrix:
ProcessMatrix(mMain, mDelta, mX, mY, aData, aContext, aPresContext,
aCanStoreInRuleTree);
break;
default:
NS_NOTREACHED("Unknown transform function!");
}
}
/// <summary>
/// Resets this matrix to a scaling matrix.
/// </summary>
/// <param name="scaleX">Factor to scale by in the X direction.</param>
/// <param name="scaleY">Factor to scale by in the Y direction.</param>
/// <param name="scaleZ">Factor to scale by in the Z direction.</param>
void Matrix3D::SetToScaling(double scaleX, double scaleY, double scaleZ)
{
SetToIdentity();
m00 = scaleX;
m11 = scaleY;
m22 = scaleZ;
}
/// <summary>
/// Resets this matrix to a translation matrix.
/// </summary>
/// <param name="transX">Distance to translate in the X direction.</param>
/// <param name="transY">Distance to translate in the Y direction.</param>
/// <param name="transZ">Distance to translate in the Z direction.</param>
void Matrix3D::SetToTranslation(double transX, double transY, double transZ)
{
SetToIdentity();
m03 = transX;
m13 = transY;
m23 = transZ;
}
void LoadAnimationDataFromCollada( const char* fileName, ArmatureKeyFrame* keyframe, Armature* armature ) {
tinyxml2::XMLDocument colladaDoc;
colladaDoc.LoadFile( fileName );
tinyxml2::XMLNode* animationNode = colladaDoc.FirstChildElement( "COLLADA" )->FirstChildElement( "library_animations" )->FirstChild();
while( animationNode != NULL ) {
//Desired data: what bone, and what local transform to it occurs
Mat4 boneLocalTransform;
Bone* targetBone = NULL;
//Parse the target attribute from the XMLElement for channel, and get the bone it corresponds to
const char* transformName = animationNode->FirstChildElement( "channel" )->Attribute( "target" );
size_t nameLen = strlen( transformName );
char* transformNameCopy = (char*)alloca( nameLen );
strcpy( transformNameCopy, transformName );
char* nameEnd = transformNameCopy;
while( *nameEnd != '/' && *nameEnd != 0 ) {
nameEnd++;
}
memset( transformNameCopy, 0, nameLen );
nameLen = nameEnd - transformNameCopy;
memcpy( transformNameCopy, transformName, nameLen );
for( uint8 boneIndex = 0; boneIndex < armature->boneCount; boneIndex++ ) {
if( strcmp( armature->bones[ boneIndex ].name, transformNameCopy ) == 0 ) {
targetBone = &armature->bones[ boneIndex ];
break;
}
}
//Parse matrix data, and extract first keyframe data
tinyxml2::XMLNode* transformMatrixElement = animationNode->FirstChild()->NextSibling();
const char* matrixTransformData = transformMatrixElement->FirstChild()->FirstChild()->Value();
size_t transformDataLen = strlen( matrixTransformData ) + 1;
char* transformDataCopy = (char*)alloca( transformDataLen * sizeof( char ) );
memset( transformDataCopy, 0, transformDataLen );
memcpy( transformDataCopy, matrixTransformData, transformDataLen );
int count = 0;
transformMatrixElement->FirstChildElement()->QueryAttribute( "count", &count );
float* rawTransformData = (float*)alloca( count * sizeof(float) );
memset( rawTransformData, 0, count * sizeof(float) );
TextToNumberConversion( transformDataCopy, rawTransformData );
memcpy( &boneLocalTransform.m[0][0], &rawTransformData[0], 16 * sizeof(float) );
//Save data in BoneKeyFrame struct
boneLocalTransform = TransposeMatrix( boneLocalTransform );
if( targetBone == armature->rootBone ) {
Mat4 correction;
correction.m[0][0] = 1.0f; correction.m[0][1] = 0.0f; correction.m[0][2] = 0.0f; correction.m[0][3] = 0.0f;
correction.m[1][0] = 0.0f; correction.m[1][1] = 0.0f; correction.m[1][2] = -1.0f; correction.m[1][3] = 0.0f;
correction.m[2][0] = 0.0f; correction.m[2][1] = 1.0f; correction.m[2][2] = 0.0f; correction.m[2][3] = 0.0f;
correction.m[3][0] = 0.0f; correction.m[3][1] = 0.0f; correction.m[3][2] = 0.0f; correction.m[3][3] = 1.0f;
boneLocalTransform = MultMatrix( boneLocalTransform, correction );
}
BoneKeyFrame* key = &keyframe->targetBoneTransforms[ targetBone->boneIndex ];
key->combinedMatrix = boneLocalTransform;
DecomposeMat4( boneLocalTransform, &key->scale, &key->rotation, &key->translation );
Mat4 m = Mat4FromComponents( key->scale, key->rotation, key->translation );
animationNode = animationNode->NextSibling();
}
//Pre multiply bones with parents to save doing it during runtime
struct {
ArmatureKeyFrame* keyframe;
void PremultiplyKeyFrame( Bone* target, Mat4 parentTransform ) {
BoneKeyFrame* boneKey = &keyframe->targetBoneTransforms[ target->boneIndex ];
Mat4 netMatrix = MultMatrix( boneKey->combinedMatrix, parentTransform );
for( uint8 boneIndex = 0; boneIndex < target->childCount; boneIndex++ ) {
PremultiplyKeyFrame( target->children[ boneIndex ], netMatrix );
}
boneKey->combinedMatrix = netMatrix;
DecomposeMat4( boneKey->combinedMatrix, &boneKey->scale, &boneKey->rotation, &boneKey->translation );
}
}LocalRecursiveScope;
LocalRecursiveScope.keyframe = keyframe;
Mat4 i; SetToIdentity( &i );
LocalRecursiveScope.PremultiplyKeyFrame( armature->rootBone, i );
}
void LoadMeshDataFromDisk( const char* fileName, SlabSubsection_Stack* allocater, MeshGeometryData* storage, Armature* armature ) {
tinyxml2::XMLDocument colladaDoc;
colladaDoc.LoadFile( fileName );
//if( colladaDoc == NULL ) {
//printf( "Could not load mesh: %s\n", fileName );
//return;
//}
tinyxml2::XMLElement* meshNode = colladaDoc.FirstChildElement( "COLLADA" )->FirstChildElement( "library_geometries" )
->FirstChildElement( "geometry" )->FirstChildElement( "mesh" );
char* colladaTextBuffer = NULL;
size_t textBufferLen = 0;
uint16 vCount = 0;
uint16 nCount = 0;
uint16 uvCount = 0;
uint16 indexCount = 0;
float* rawColladaVertexData;
float* rawColladaNormalData;
float* rawColladaUVData;
float* rawIndexData;
///Basic Mesh Geometry Data
{
tinyxml2::XMLNode* colladaVertexArray = meshNode->FirstChildElement( "source" );
tinyxml2::XMLElement* vertexFloatArray = colladaVertexArray->FirstChildElement( "float_array" );
tinyxml2::XMLNode* colladaNormalArray = colladaVertexArray->NextSibling();
tinyxml2::XMLElement* normalFloatArray = colladaNormalArray->FirstChildElement( "float_array" );
tinyxml2::XMLNode* colladaUVMapArray = colladaNormalArray->NextSibling();
tinyxml2::XMLElement* uvMapFloatArray = colladaUVMapArray->FirstChildElement( "float_array" );
tinyxml2::XMLElement* meshSrc = meshNode->FirstChildElement( "polylist" );
tinyxml2::XMLElement* colladaIndexArray = meshSrc->FirstChildElement( "p" );
int count;
const char* colladaVertArrayVal = vertexFloatArray->FirstChild()->Value();
vertexFloatArray->QueryAttribute( "count", &count );
vCount = count;
const char* colladaNormArrayVal = normalFloatArray->FirstChild()->Value();
normalFloatArray->QueryAttribute( "count", &count );
nCount = count;
const char* colladaUVMapArrayVal = uvMapFloatArray->FirstChild()->Value();
uvMapFloatArray->QueryAttribute( "count", &count );
uvCount = count;
const char* colladaIndexArrayVal = colladaIndexArray->FirstChild()->Value();
meshSrc->QueryAttribute( "count", &count );
//Assume this is already triangulated
indexCount = count * 3 * 3;
///TODO: replace this with fmaxf?
std::function< size_t (size_t, size_t) > sizeComparison = []( size_t size1, size_t size2 ) -> size_t {
if( size1 >= size2 ) return size1;
return size2;
};
textBufferLen = strlen( colladaVertArrayVal );
textBufferLen = sizeComparison( strlen( colladaNormArrayVal ), textBufferLen );
textBufferLen = sizeComparison( strlen( colladaUVMapArrayVal ), textBufferLen );
textBufferLen = sizeComparison( strlen( colladaIndexArrayVal ), textBufferLen );
colladaTextBuffer = (char*)alloca( textBufferLen );
memset( colladaTextBuffer, 0, textBufferLen );
rawColladaVertexData = (float*)alloca( sizeof(float) * vCount );
rawColladaNormalData = (float*)alloca( sizeof(float) * nCount );
rawColladaUVData = (float*)alloca( sizeof(float) * uvCount );
rawIndexData = (float*)alloca( sizeof(float) * indexCount );
memset( rawColladaVertexData, 0, sizeof(float) * vCount );
memset( rawColladaNormalData, 0, sizeof(float) * nCount );
memset( rawColladaUVData, 0, sizeof(float) * uvCount );
memset( rawIndexData, 0, sizeof(float) * indexCount );
//Reading Vertex position data
strcpy( colladaTextBuffer, colladaVertArrayVal );
TextToNumberConversion( colladaTextBuffer, rawColladaVertexData );
//Reading Normals data
memset( colladaTextBuffer, 0, textBufferLen );
strcpy( colladaTextBuffer, colladaNormArrayVal );
TextToNumberConversion( colladaTextBuffer, rawColladaNormalData );
//Reading UV map data
memset( colladaTextBuffer, 0, textBufferLen );
strcpy( colladaTextBuffer, colladaUVMapArrayVal );
TextToNumberConversion( colladaTextBuffer, rawColladaUVData );
//Reading index data
memset( colladaTextBuffer, 0, textBufferLen );
strcpy( colladaTextBuffer, colladaIndexArrayVal );
TextToNumberConversion( colladaTextBuffer, rawIndexData );
}
float* rawBoneWeightData = NULL;
float* rawBoneIndexData = NULL;
//Skinning Data
{
tinyxml2::XMLElement* libControllers = colladaDoc.FirstChildElement( "COLLADA" )->FirstChildElement( "library_controllers" );
if( libControllers == NULL ) goto skinningExit;
tinyxml2::XMLElement* controllerElement = libControllers->FirstChildElement( "controller" );
if( controllerElement == NULL ) goto skinningExit;
tinyxml2::XMLNode* vertexWeightDataArray = controllerElement->FirstChild()->FirstChild()->NextSibling()->NextSibling()->NextSibling();
tinyxml2::XMLNode* vertexBoneIndexDataArray = vertexWeightDataArray->NextSibling()->NextSibling();
tinyxml2::XMLNode* vCountArray = vertexBoneIndexDataArray->FirstChildElement( "vcount" );
tinyxml2::XMLNode* vArray = vertexBoneIndexDataArray->FirstChildElement( "v" );
const char* boneWeightsData = vertexWeightDataArray->FirstChild()->FirstChild()->Value();
const char* vCountArrayData = vCountArray->FirstChild()->Value();
const char* vArrayData = vArray->FirstChild()->Value();
float* colladaBoneWeightData = NULL;
float* colladaBoneIndexData = NULL;
float* colladaBoneInfluenceCounts = NULL;
///This is overkill, Collada stores ways less data usually, plus this still doesn't account for very complex models
///(e.g, lots of verts with more than MAXBONESPERVERT influencing position )
colladaBoneWeightData = (float*)alloca( sizeof(float) * MAXBONESPERVERT * vCount );
colladaBoneIndexData = (float*)alloca( sizeof(float) * MAXBONESPERVERT * vCount );
colladaBoneInfluenceCounts = (float*)alloca( sizeof(float) * MAXBONESPERVERT * vCount );
//Read bone weights data
memset( colladaTextBuffer, 0, textBufferLen );
strcpy( colladaTextBuffer, boneWeightsData );
TextToNumberConversion( colladaTextBuffer, colladaBoneWeightData );
//Read bone index data
memset( colladaTextBuffer, 0, textBufferLen );
strcpy( colladaTextBuffer, vArrayData );
TextToNumberConversion( colladaTextBuffer, colladaBoneIndexData );
//Read bone influence counts
memset( colladaTextBuffer, 0, textBufferLen );
strcpy( colladaTextBuffer, vCountArrayData );
TextToNumberConversion( colladaTextBuffer, colladaBoneInfluenceCounts );
rawBoneWeightData = (float*)alloca( sizeof(float) * MAXBONESPERVERT * vCount );
rawBoneIndexData = (float*)alloca( sizeof(float) * MAXBONESPERVERT * vCount );
memset( rawBoneWeightData, 0, sizeof(float) * MAXBONESPERVERT * vCount );
memset( rawBoneIndexData, 0, sizeof(float) * MAXBONESPERVERT * vCount );
int colladaIndexIndirection = 0;
int verticiesInfluenced = 0;
vCountArray->Parent()->ToElement()->QueryAttribute( "count", &verticiesInfluenced );
for( uint16 i = 0; i < verticiesInfluenced; i++ ) {
uint8 influenceCount = colladaBoneInfluenceCounts[i];
for( uint16 j = 0; j < influenceCount; j++ ) {
uint16 boneIndex = colladaBoneIndexData[ colladaIndexIndirection++ ];
uint16 weightIndex = colladaBoneIndexData[ colladaIndexIndirection++ ];
rawBoneWeightData[ i * MAXBONESPERVERT + j ] = colladaBoneWeightData[ weightIndex ];
rawBoneIndexData[ i * MAXBONESPERVERT + j ] = boneIndex;
}
}
}
skinningExit:
//Armature
if( armature != NULL ) {
tinyxml2::XMLElement* visualScenesNode = colladaDoc.FirstChildElement( "COLLADA" )->FirstChildElement( "library_visual_scenes" )
->FirstChildElement( "visual_scene" )->FirstChildElement( "node" );
tinyxml2::XMLElement* armatureNode = NULL;
//Step through scene heirarchy until start of armature is found
while( visualScenesNode != NULL ) {
if( visualScenesNode->FirstChildElement( "node" ) != NULL &&
visualScenesNode->FirstChildElement( "node" )->Attribute( "type", "JOINT" ) != NULL ) {
armatureNode = visualScenesNode;
break;
} else {
visualScenesNode = visualScenesNode->NextSibling()->ToElement();
}
}
if( armatureNode == NULL ) return;
//Parsing basic bone data from XML
std::function< Bone* ( tinyxml2::XMLElement*, Armature*, Bone* ) > ParseColladaBoneData =
[&]( tinyxml2::XMLElement* boneElement, Armature* armature, Bone* parentBone ) -> Bone* {
Bone* bone = &armature->bones[ armature->boneCount ];
bone->parent = parentBone;
bone->currentTransform = &armature->boneTransforms[ armature->boneCount ];
SetToIdentity( bone->currentTransform );
bone->boneIndex = armature->boneCount;
armature->boneCount++;
strcpy( &bone->name[0], boneElement->Attribute( "sid" ) );
float matrixData[16];
char matrixTextData [512];
tinyxml2::XMLNode* matrixElement = boneElement->FirstChildElement("matrix");
strcpy( &matrixTextData[0], matrixElement->FirstChild()->ToText()->Value() );
TextToNumberConversion( matrixTextData, matrixData );
//Note: this is only local transform data, but its being saved in bind matrix for now
Mat4 m;
memcpy( &m.m[0][0], &matrixData[0], sizeof(float) * 16 );
bone->bindPose = TransposeMatrix( m );
if( parentBone == NULL ) {
armature->rootBone = bone;
} else {
bone->bindPose = MultMatrix( parentBone->bindPose, bone->bindPose );
}
bone->childCount = 0;
tinyxml2::XMLElement* childBoneElement = boneElement->FirstChildElement( "node" );
while( childBoneElement != NULL ) {
Bone* childBone = ParseColladaBoneData( childBoneElement, armature, bone );
bone->children[ bone->childCount++ ] = childBone;
tinyxml2::XMLNode* siblingNode = childBoneElement->NextSibling();
if( siblingNode != NULL ) {
childBoneElement = siblingNode->ToElement();
} else {
childBoneElement = NULL;
}
};
return bone;
};
armature->boneCount = 0;
tinyxml2::XMLElement* boneElement = armatureNode->FirstChildElement( "node" );
ParseColladaBoneData( boneElement, armature, NULL );
//Parse inverse bind pose data from skinning section of XML
{
tinyxml2::XMLElement* boneNamesSource = colladaDoc.FirstChildElement( "COLLADA" )->FirstChildElement( "library_controllers" )
->FirstChildElement( "controller" )->FirstChildElement( "skin" )->FirstChildElement( "source" );
tinyxml2::XMLElement* boneBindPoseSource = boneNamesSource->NextSibling()->ToElement();
char* boneNamesLocalCopy = NULL;
float* boneMatriciesData = (float*)alloca( sizeof(float) * 16 * armature->boneCount );
const char* boneNameArrayData = boneNamesSource->FirstChild()->FirstChild()->Value();
const char* boneMatrixTextData = boneBindPoseSource->FirstChild()->FirstChild()->Value();
size_t nameDataLen = strlen( boneNameArrayData );
size_t matrixDataLen = strlen( boneMatrixTextData );
boneNamesLocalCopy = (char*)alloca( nameDataLen + 1 );
memset( boneNamesLocalCopy, 0, nameDataLen + 1 );
assert( textBufferLen > matrixDataLen );
memcpy( boneNamesLocalCopy, boneNameArrayData, nameDataLen );
memcpy( colladaTextBuffer, boneMatrixTextData, matrixDataLen );
TextToNumberConversion( colladaTextBuffer, boneMatriciesData );
char* nextBoneName = &boneNamesLocalCopy[0];
for( uint8 matrixIndex = 0; matrixIndex < armature->boneCount; matrixIndex++ ) {
Mat4 matrix;
memcpy( &matrix.m[0], &boneMatriciesData[matrixIndex * 16], sizeof(float) * 16 );
char boneName [32];
char* boneNameEnd = nextBoneName;
do {
boneNameEnd++;
} while( *boneNameEnd != ' ' && *boneNameEnd != 0 );
size_t charCount = boneNameEnd - nextBoneName;
memset( boneName, 0, sizeof( char ) * 32 );
memcpy( boneName, nextBoneName, charCount );
nextBoneName = boneNameEnd + 1;
Bone* targetBone = NULL;
for( uint8 boneIndex = 0; boneIndex < armature->boneCount; boneIndex++ ) {
Bone* bone = &armature->bones[ boneIndex ];
if( strcmp( bone->name, boneName ) == 0 ) {
targetBone = bone;
break;
}
}
Mat4 correction;
correction.m[0][0] = 1.0f; correction.m[0][1] = 0.0f; correction.m[0][2] = 0.0f; correction.m[0][3] = 0.0f;
correction.m[1][0] = 0.0f; correction.m[1][1] = 0.0f; correction.m[1][2] = 1.0f; correction.m[1][3] = 0.0f;
correction.m[2][0] = 0.0f; correction.m[2][1] = -1.0f; correction.m[2][2] = 0.0f; correction.m[2][3] = 0.0f;
correction.m[3][0] = 0.0f; correction.m[3][1] = 0.0f; correction.m[3][2] = 0.0f; correction.m[3][3] = 1.0f;
targetBone->invBindPose = TransposeMatrix( matrix );
targetBone->invBindPose = MultMatrix( correction, targetBone->invBindPose );
}
}
}
//output to my version of storage
storage->dataCount = 0;
uint16 counter = 0;
const uint32 vertCount = indexCount / 3;
storage->vData = (Vec3*)AllocOnSubStack_Aligned( allocater, vertCount * sizeof( Vec3 ), 16 );
storage->uvData = (float*)AllocOnSubStack_Aligned( allocater, vertCount * 2 * sizeof( float ), 4 );
storage->normalData = (Vec3*)AllocOnSubStack_Aligned( allocater, vertCount * sizeof( Vec3 ), 4 );
storage->iData = (uint32*)AllocOnSubStack_Aligned( allocater, vertCount * sizeof( uint32 ), 4 );
if( rawBoneWeightData != NULL ) {
storage->boneWeightData = (float*)AllocOnSubStack_Aligned( allocater, sizeof(float) * vertCount * MAXBONESPERVERT, 4 );
storage->boneIndexData = (uint32*)AllocOnSubStack_Aligned( allocater, sizeof(uint32) * vertCount * MAXBONESPERVERT, 4 );
} else {
storage->boneWeightData = NULL;
storage->boneIndexData = NULL;
}
while( counter < indexCount ) {
Vec3 v, n;
float uv_x, uv_y;
uint16 vertIndex = rawIndexData[ counter++ ];
uint16 normalIndex = rawIndexData[ counter++ ];
uint16 uvIndex = rawIndexData[ counter++ ];
v.x = rawColladaVertexData[ vertIndex * 3 + 0 ];
v.z = -rawColladaVertexData[ vertIndex * 3 + 1 ];
v.y = rawColladaVertexData[ vertIndex * 3 + 2 ];
n.x = rawColladaNormalData[ normalIndex * 3 + 0 ];
n.z = -rawColladaNormalData[ normalIndex * 3 + 1 ];
n.y = rawColladaNormalData[ normalIndex * 3 + 2 ];
uv_x = rawColladaUVData[ uvIndex * 2 ];
uv_y = rawColladaUVData[ uvIndex * 2 + 1 ];
///TODO: check for exact copies of data, use to index to first instance instead
uint32 storageIndex = storage->dataCount;
storage->vData[ storageIndex ] = v;
storage->normalData[ storageIndex ] = n;
storage->uvData[ storageIndex * 2 ] = uv_x;
storage->uvData[ storageIndex * 2 + 1 ] = uv_y;
if( rawBoneWeightData != NULL ) {
uint16 boneDataIndex = storage->dataCount * MAXBONESPERVERT;
uint16 boneVertexIndex = vertIndex * MAXBONESPERVERT;
for( uint8 i = 0; i < MAXBONESPERVERT; i++ ) {
storage->boneWeightData[ boneDataIndex + i ] = rawBoneWeightData[ boneVertexIndex + i ];
storage->boneIndexData[ boneDataIndex + i ] = rawBoneIndexData[ boneVertexIndex + i ];
}
}
storage->iData[ storageIndex ] = storageIndex;
storage->dataCount++;
};
}
/* Constructor sets the data to the identity matrix. */
nsStyleTransformMatrix::nsStyleTransformMatrix()
{
SetToIdentity();
}
/// <summary>
/// Initializes a new instance of the Matrix3D class to
/// the identity matrix.
/// </summary>
Matrix3D::Matrix3D()
{
SetToIdentity();
}
void Mtx44::SetToTranslation(float tx, float ty, float tz) {
SetToIdentity();
a[12] = tx;
a[13] = ty;
a[14] = tz;
}
void Mtx44::SetToScale(float sx, float sy, float sz) {
SetToIdentity();
a[0] = sx;
a[5] = sy;
a[10] = sz;
}