refactor brush transform evaluation code to reduce amount of unneeded evaluations to 0

improvable: don't evaluateBRep on shader changed, perhaps more
fix: brush vertex manip: no vertexModeFree() after identity transform (mouse forth and back / rotate dialog 0 / insertion w/o move) = selects vertices on undo
fix: brush vertex manip: tex vertex lock: broken for 220
use brush::vertexmode code to delete selected brush components

libs/transformlib.h

@@ -145,7 +145,6 @@ Callback m_changed;
 Callback m_apply;
 TransformModifierType m_type;
 public:
-bool m_transformFrozen = true;
 
 TransformModifier( const Callback& changed, const Callback& apply ) :
 	m_translation( c_translation_identity ),
@@ -181,13 +180,85 @@ void setSkew( const Skew& value ){
 void freezeTransform(){
 	if ( !isIdentity() ) {
 		m_apply();
-		m_translation = c_translation_identity;
-		m_rotation = c_rotation_identity;
-		m_scale = c_scale_identity;
-		m_skew = c_skew_identity;
-		m_transformFrozen = true;
+		setIdentity();
 		m_changed();
 	}
+}
+const Translation& getTranslation() const {
+	return m_translation;
+}
+const Rotation& getRotation() const {
+	return m_rotation;
+}
+const Scale& getScale() const {
+	return m_scale;
+}
+const Skew& getSkew() const {
+	return m_skew;
+}
+Matrix4 calculateTransform() const {
+	return matrix4_transform_for_components( getTranslation(), getRotation(), getScale(), getSkew() );
+}
+private:
+bool isIdentity() const {
+	return m_translation == c_translation_identity
+		 && m_rotation == c_rotation_identity
+		 && m_scale == c_scale_identity
+		 && m_skew == c_skew_identity;
+}
+void setIdentity(){
+	m_translation = c_translation_identity;
+	m_rotation = c_rotation_identity;
+	m_scale = c_scale_identity;
+	m_skew = c_skew_identity;
+}
+};
+
+class BrushTransformModifier : public Transformable
+{
+Translation m_translation;
+Rotation m_rotation;
+Scale m_scale;
+Skew m_skew;
+Callback m_changed;
+Callback m_apply;
+TransformModifierType m_type;
+public:
+bool m_transformFrozen = true;
+
+BrushTransformModifier( const Callback& changed, const Callback& apply ) :
+	m_translation( c_translation_identity ),
+	m_rotation( c_quaternion_identity ),
+	m_scale( c_scale_identity ),
+	m_skew( c_skew_identity ),
+	m_changed( changed ),
+	m_apply( apply ),
+	m_type( TRANSFORM_PRIMITIVE ){
+}
+void setType( TransformModifierType type ){
+	m_type = type;
+}
+TransformModifierType getType() const {
+	return m_type;
+}
+void setTranslation( const Translation& value ){
+	m_translation = value;
+	m_changed();
+}
+void setRotation( const Rotation& value ){
+	m_rotation = value;
+	m_changed();
+}
+void setScale( const Scale& value ){
+	m_scale = value;
+	m_changed();
+}
+void setSkew( const Skew& value ){
+	m_skew = value;
+	m_changed();
+}
+void freezeTransform(){
+	m_apply();
 	m_transformFrozen = true;
 }
 const Translation& getTranslation() const {
@@ -211,6 +282,12 @@ bool isIdentity() const {
 		 && m_scale == c_scale_identity
 		 && m_skew == c_skew_identity;
 }
+void setIdentity(){
+	m_translation = c_translation_identity;
+	m_rotation = c_rotation_identity;
+	m_scale = c_scale_identity;
+	m_skew = c_skew_identity;
+}
 };