Tactex Controls TCIMTCEXP100 Touchpad Input Device User Manual Multi Touch Manual

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Document ID	105820
Application ID	YToJ5plJWRL/XJScONNTYw==
Document Description	Users Manual part 3
Short Term Confidential	No
Permanent Confidential	No
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Document Type	User Manual
Display Format	Adobe Acrobat PDF - pdf
Filesize	16.63kB (207928 bits)
Date Submitted	2000-06-20 00:00:00
Date Available	2000-06-22 00:00:00
Creation Date	2000-06-02 04:30:32
Producing Software	Acrobat Distiller 4.0 for Macintosh
Document Lastmod	2000-06-02 04:31:07
Document Title	Multi Touch Manual
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Document Author:	DCM

MTC Express
Part 3 – API Reference
This section provides a brief description of the API functions and data
definitions.
API Data Structures
MTCCreate
typedef struct MTCCREATE
char
*inputPort;
// name of the input driver
char
*outputPort;
// name of the output driver
char
*mappingFile; // path and filename of the mapping file
char
*normalFile;
// path and filename of the
normalization file
} MTCCreate;
MTCCompType
typedef enum
MTCCompNone,
MTCCompThresh,
MTCCompDefault
} MTCCompType;
MTCQueryType
typedef enum
MTCQueryCurrent,
MTCQueryDefault,
MTCQueryMax,
MTCQueryCount
} MTCQueryType;
MTCConfig
typedef struct MTCCONFIG
int
nTaxels;
int
nRows;
int
nCols;
float
xDimension;
float
yDimension;
char
*unitDescriptor;
} MTCConfig;
3-1
MTC Express
MTCPointer
typedef struct MTCPOINTER
BOOL
valid_pointer;
int
pointer_num;
float
pressure;
float
x_pos;
float
y_pos;
float
x_vel;
float
y_vel;
} MTCPointer;
API Function Descriptions
Connecting and Disconnecting
MTCHandle MTC_New(MTCCreate mtcCreate)
This function creates an instance of a Tactex MTC object. In the
process, this function does the following:
a.
b.
c.
d.
e.
f.
Allocates memory for the MTC object.
Reads the mapping (configuration) file from disk.
Reads the normalization file from disk. If a normalization file
with the name specified does not exist, then one is
automatically created.
Opens the serial communication driver.
"pings" the MTC to verify a connection.
Determines the MTC Express firmware version.
Parameters:
mtcCreate - A structure specifying the input and output serial ports and
locations of the mapping and normalization files.
Return:
MTC_New() returns a handle to a touch pad instance. It returns NULL if
the function failed to create a new instance of the MTC.
MTC_GetLastError() can be called with a NULL argument to
determine the cause of failure.
BOOL MTC_Delete(MTCHandle hMTC)
This function stops the communication with the MTC identified by hMTC
and frees the system resources allocated for the particular MTC.
Parameters:
hMTC - handle of the MTC.
Return:
MTC_Delete() returns a TRUE if successful. Otherwise a FALSE is
returned.
3-2
MTC Express
Version and Configuration
BOOL MTC_GetAPIVersion(char *apiVer)
This function fills the buffer pointed to by apiVer with an API version
string. The API version sting is null-terminated and consists of no more
than 50 characters.
Parameters:
apiVer - pointer to a buffer which must be at least 50 bytes long
Return:
MTC_GetAPIVersion() returns TRUE if successful. Otherwise FALSE is
returned.
BOOL MTC_GetConfig(MTCHandle hMTC, MTCConfig *config)
This function fills the config structure with the configuration data of the
specified MTC. If a MTC descriptor string has not been received from
the MTC, the host computer will poll the MTC for its descriptor string.
Parameters:
hMTC - handle of the MTC from which the configuration data is
requested.
config - pointer to a MTCConfig structure to be filled with the
configuration data.
Return:
MTC_GetVersion() returns TRUE if successful, FALSE otherwise.
Int MTC_GetDescriptorString(MTCHandle hMTC,char *descStr, int
msecWait)
This function stops the data stream from the MTC, and fills the buffer
pointed to by descStr with a null-terminated string containing the
configuration information obtained from the MTC Express. This
function will wait for a response from the MTC for up to msecWait
milliseconds. The unit descriptor string will also be placed in the
internal API memory for future reference when MTC_GetConfig() is
called. This function is automatically called by the API when
MTC_New is called, so a more efficient way to get the descriptor string
is to call MTC_GetConfig.
Parameters:
hMTC - handle of the MTC.
descStr - pointer to place unit descriptor string
msecWait - Allowed response time specified in milliseconds
Return:
The length of the configuration string is returned. Zero is returned if the
MTC failed to respond.
3-3
MTC Express
Error Reporting
MTCErr MTC_GetLastError(MTCHandle hMTC)
This function returns the error code associated with the specified MTC.
If hMTC is NULL, then it returns general errors not associated with a
specific MTC. If no errors are associated with the specific MTC, then
general errors are checked. Once an error has been reported, it is
cleared (i.e. subsequent calls to MTC_GetLastError() will not report
the same event). However, some errors are accumulated and
MTC_GetLastError() may be called successively in order to retrieve
them.
Parameters:
hMTC - handle of the MTC.
Return:
The MTCErr is returned.
char *MTC_GetErrorString(MTCErr errCode)
This function returns a pointer to a null-terminated string that provides
a brief description of the specified error code.
Parameters:
errCode - Error code specifying a MTC error return by
MTC_GetLastError()
Return:
A pointer to the error string specified by errCode is returned.
Control of the Data Stream
BOOL MTC_GetIsConnected(MTCHandle hMTC, int msecWait)
This function pings the specified MTC. It returns TRUE if the MTC
responds to the ping within the time specified by msecWait.
Parameters:
hMTC - handle of the MTC.
msecWait – maximum allowable response time specified in
milliseconds.
Return:
A TRUE is returned if the host computer is connected to the MTC.
Otherwise a FALSE is returned.
3-4
MTC Express
BOOL MTC_StartSendingData(MTCHandle hMTC, MTCCompType
compressionType, int msecWait)
This function initiates the stream of data from the MTC. It will wait up
to msecWait milliseconds for a response before returning. It is
necessary to call this function before MTC_GetNormalizedData or
MTC_GetRawData.
Parameters:
hMTC - handle of the MTC.
compressionType - Instruct the MTC to use a specified compression
method
msecWait - Allowed response time specified in milliseconds
Return:
A TRUE is returned if the data-stream was successfully initiated. If the
data-stream was not detected before the time-out period or if the hMTC
is not valid, a FALSE is returned.
BOOL MTC_StopSendingData(MTCHandle hMTC, int msecWait)
This function stops the stream of data from the specified MTC. It will
wait up to msecWait milliseconds for acknowledgement from the MTC.
Parameters:
hMTC - handle of the MTC.
msecWait – Maximum allowable response time specified in
milliseconds.
Return:
A TRUE is returned if the data stream has been successfully initiated.
Otherwise a FALSE is returned.
3-5
MTC Express
float MTC_SetSampleRate(MTCHandle hMTC, float sampleRate,
MTCCompType compressionType, int msecWait)
The sample rate of the MTC Express is the rate at which it measures
the pressure over the entire pad (i.e. all 72 taxels). Data from the MTC
Express is transmitted over the serial cable after each complete
sample. Due to bandwidth limitation of the serial connection, higher
sampling frequencies must use data compression. This function sets
the MTC Express sample rate using the compressionType specified.
Some MTC Express units may not be capable of sampling at the
desired sampleRate.
Parameters:
hMTC - handle of the MTC.
sampleRate - desired MTC sample rate.
compressionType - set the MTC compression type.
msecWait - Allowed response time specified in milliseconds
Return:
A sample rate closest to the input parameter sampleRate is returned
using the compressionType specified. A sample rate of zero is
returned if the operation was unsuccessful.
float MTC_GetSampleRate(MTCHandle hMTC, MTCCompType
compressionType, MTCQueryType queryType)
This function returns the rate at which the MTC Express can transmit
data using the compressionType specified. The queryType is used to
specify the current setting, default or maximum sample rates. This
function does not change the operation of the API or MTC Express, it
simply reports what the MTC Express is capable of. Specifying
MTCQueryCurrent ignores the compressionType and retrieves the last
sample rate requested of the connected MTC; use
MTC_GetMeasuredSampleRate() to return the actual sample rate.
Parameters:
hMTC - handle of the MTC.
compressionType - the MTC compression type.
queryType - the current, default or maximum sample rate.
Return:
The (current, default or maximum) sample rate, in Hz, using
compressionType.
3-6
MTC Express
float MTC_GetMeasuredSampleRate(MTCHandle hMTC)
This function returns a measured sample rate from the specified MTC.
This sample rate is calculated by dividing the number of samples
received from the MTC in a pre-set time period.
Parameters:
hMTC - handle of the MTC.
Return:
A measured sample rate, in Hz (samples/second), is returned.
Control of Normalization
BOOL MTC_BeginNormalization(MTCHandle hMTC)
This function starts the automatic normalization (calibration) process.
It resets the data calibration parameters and sets a flag internal to the
API so that subsequent calls to MTC_GetRawData or
MTC_GetNormalizedData will update those parameters.
Parameters:
hMTC - handle of the MTC.
Return:
A TRUE is returned if the normalization process is started correctly.
BOOL MTC_EndNormalization(MTCHandle hMTC, BOOL saveToDisk)
This function completes the normalization process. This function
freezes the API’s internal data calibration parameters. If saveToDisk is
TRUE, the normalization file is overwritten, otherwise the normalization
data continues to be used for this session, but the file is not
overwritten.
Parameters:
hMTC - handle of the MTC.
saveToDisk - When TRUE, the normalization data is saved to disk.
Return:
TRUE is returned if the normalization process is successful.
3-7
MTC Express
Data Gathering
long MTC_GetRawData(MTCHandle hMTC, WORD *dataPtr)
This function fills the array pointed to by dataPtr with the taxel raw
pressure data received from the MTC Express.
Parameters:
hMTC - handle of the MTC.
dataPtr - pointer to a memory location capable of storing taxel data.
The user is required to ensure that the array is long enough.
Return:
The MTC Express measures, or samples, the pressure on the touch
pad up to 200 times per second. After each measurement, the MTC
Express transmits the data over the serial port, and tags the data
packet with its sample number. The MTC_GetRawData function returns
that sample number if data is present. Otherwise 0 is returned.
long MTC_GetNormalizedData(MTCHandle hMTC, WORD *dataPtr)
This function fills the array pointed to by dataPtr with normalized taxel
pressure data.
Parameters:
hMTC - handle of the MTC.
dataPtr - pointer to a memory location capable of storing normalized
taxel data.
Return:
The sample number is returned if data is present. Otherwise 0 is
returned.
3-8
MTC Express
Taxel Physical Configuration
float MTC_GetTaxelX(MTCHandle hMTC, int taxelNum)
This function returns the x-coordinate, in mm, of the taxel specified by
taxelNum. taxelNum is the index of the array filled by
MTC_GetRawPressure or MTC_GetNormalizedPressure. The value of
taxelNum must be less than the value in the nTaxels field of the
MTCConfig structure obtained using the MTC_GetConfig function.
Parameters:
hMTC - handle of the MTC.
taxelNum - A specified taxel number.
Return:
This function returns the x-coordinate of the specified taxel in mm.
float MTC_GetTaxelY(MTCHandle hMTC, int taxelNum)
This function returns the y-coordinate, in mm, of the taxel specified by
taxelNum. taxelNum is the index of the array filled by
MTC_GetRawPressure or MTC_GetNormalizedPressure. The value of
taxelNum must be less than the value in the nTaxels field of the
MTCConfig structure obtained using the MTC_GetConfig function.
Parameters:
hMTC - handle of the MTC.
taxelNum - A specified taxel number.
Return:
This function returns the y-coordinate of the specified taxel in mm.
int MTC_GetTaxelCol (MTCHandle hMTC, int taxelNum)
This function returns the column, between 1 and nCols, of the taxel
specified by taxelNum. taxelNum is the index of the array filled by
MTC_GetRawPressure or MTC_GetNormalizedPressure. The value of
taxelNum must be less than the value in the nTaxels field of the
MTCConfig structure obtained using the MTC_GetConfig function.
Parameters:
hMTC - handle of the MTC.
taxelNum - A specified taxel number.
Return:
This function returns the number of the column in which the specified
taxel is located.
3-9
MTC Express
int MTC_GetTaxelRow (MTCHandle hMTC, int taxelNum)
This function returns the row, between 1 and nRows, of the taxel
specified by taxelNum. taxelNum is the index of the array filled by
MTC_GetRawPressure or MTC_GetNormalizedPressure. The value of
taxelNum must be less than the value in the nTaxels field of the
MTCConfig structure obtained using the MTC_GetConfig function.
Parameters:
hMTC - handle of the MTC.
taxelNum - A specified taxel number.
Return:
This function returns the number of the row in which the specified taxel
is located.
Pointer Calculation
BOOL MTC_InitPointers(MTCHandle hMTC, int num_pointers,
MTCPointer *pointer_data_array)
This function initializes the pointer_data_array for the specified MTC
handle.
Parameters:
hMTC - handle of the MTC.
num_pointers - the total number of pointers you will ever want to
resolve.
pointer_data_array - pointer to a num_pointers element array of
type MTCPointer. The user is responsible for allocating the required
memory of size num_pointers*sizeof(MTCPointer).
Return:
MTC_InitPointers() returns a TRUE if successful. Otherwise a FALSE
is returned.
3-10
MTC Express
int MTC_ResolvePointers(MTCHandle hMTC, int num_pointers,
WORD *pressureData, int threshold, MTCPointer
*pointer_data_array, long sampleNum)
This function resolves pointer data from normalized pressure data. The
number of resolved pointers is limited to the num_pointers parameter.
A threshold parameter is used to limit the minimum pressure level at
which pointers are resolved. This is used to adjust sensitivity.
Parameters:
hMTC - handle of the MTC.
num_pointers - the total number of pointers you wish to resolve.
pressureData - pointer to a memory location containing normalized
taxel data.
threshold - minimum pressure level at which pointers are resolved.
pointer_data_array - pointer to an array of type MTCPointer with
num_pointers elements. This is where all resolved pointer data is
stored.
sampleNum - the sample number associated with the pressure data.
Return:
The number of pointers resolved is returned. Zero is returned if the
MTC handle is invalid or if the pointer algorithm was unable to resolve
any pointers.
3-11
MTC Express
Appendix A – Technical Specifications
Dimensions.......................................... (in, WxDxH)
Package Outline ..........................7.50 x 6.69 x 0.38
Electronics Bay ...........................7.06 x 2.25 x 0.50
Active Tablet Area .......................5.75 x 3.75
Construction
Enclosure ..............................Milled Aluminum
Active Area............................Polycarbonate
Weight ................................................(oz) 17.0
Minimum Activation Pressure .............(psi) 0.4
Maximum Indentation .........................(in) 0.08
Noise and Vibration Emissions ..........None
Horizontal pointing accuracy ..............(in) 0.05
Operating Power Requirements .........120 VAC, 60Hz, 8 W
Sampling Rate ....................................(Hz) up to 200
Pressure Resolution ...........................8 bits
Interface RS-232 Serial, .....................115 KBaud
Connector ...........................................DB9 or Mac Serial Adadpter
Storage Temperature ..........................(ºF) -40 to + 120
Operating Temperature ......................(ºF) +35 to + 100
Relative Humidity ................................(%) 0 to 95
Note: This equipment has been tested and found to comply with the limits for a
Class B digital device, pursuant to part 15 of the FCC Rules and ICES 03. These
limits are designed to pro-vide reasonable protection against harmful interference
in a residential installation. This equipment generates, uses and can radiate radio
frequency energy and, if not in-stalled and used in accordance with the
instructions, may cause harmful interference to radio communications. However,
there is no guarantee that interference will not occur in a particular installation. If
this equipment does cause harmful interference to radio or television reception,
which can be determined by turning the equipment off and on, the user is
encouraged to try to correct the interference by one or more of the following
measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from that to
which the receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help.
Caution: Changes or modifications to this equipment, not expressly approved by
the manufacturer could void the user's authority to operate the equipment.
MTC Express
Appendix B – Format of the Mapping File
The mapping file has the following format:
Tactex Controls Inc.
Touch Tablet Mapping File
72
145
95
200
200
KEY:
row
col
x_coord y_coord
#LED 1:
3.75
90
16.25 39
41.25 90
53.75 39
78.75 90
91.25 39
10
116.25 90
11
128.75 39
#LED 2:
3.75
73
16.25 22
41.25 73
All of the lines beginning with # are comments – they have no effect
when the mapping file is read by the API. One special line begins with
a $ character. There are five numbers in it:
72 – this is the number of taxels in the pad
145 – this is the width of the pad (x-dimension) in mm
95 – this is the height of the pad (y-dimension) in mm
200 – this is the default sample rate in samples-per-second (Hz)
200 – this is the maximum compressed sample rate in Hz
The lines following the header specify the locations of individual taxels.
The order of the rows of data is important: the serial stream of data from
the MTC Express is sent in the same order as the rows in the mapping
file. For each taxel, the following data is given:
Row – the row number
Column – the column number
x-coordinate – the location in mm
y-coordinate – the location in mm
Please refer to section "Pad Configuration (Mapping)" for figures
describing the coordinate frames of reference.
ii
MTC Express
Appendix C – Format of the Normalization File
The normalization file must have a specific format. The contents of the
normalization file look like this:
Tactex Controls Inc.
Copyright 1998
www.tactex.com tci@tactex.com
Touch Tablet Normalization File
Min
Scale
9.836538
15.268657
17.049999
12.178572
8.818966
8.119047
6.912162
All lines that begin with the # character are remarks and are ignored.
Each row of the normalization file corresponds to an individual taxel.
The ‘Min’ field indicates the taxel offset (minimum intensity with no
pressure applied to pad). The ‘Scale’ field is the scaling factor used to
normalize the taxel responses. The normalized response is computed
by the formula:
NormalizedData = (RawData – Min) * Scale
iii
MTC Express
Appendix D – The Fine Print
MTC Express Product Warranty
Tactex Controls Inc. ("Tactex") warrants to the original owner that the MTC Express
controller ("MTC Express") delivered in this package will be free from material defects
and workmanship for a period of one year following the date of manufacture or the date
of purchase as indicated on the returned warranty registration card, which ever is later.
This warranty does not extend to damage to the MTC Express incurred during
shipping. Such shipping damage should be reported immediately to the claims
department of the carrier that delivered the unit. In the event that the MTC Express fails
to perform to specification due to a defect in materials or workmanship, customers
must contact Tactex to obtain a RMA (Returned Merchandise Authorization) number
and return the unit to Tactex Controls Inc. RMA numbers will only be issued to original
owners of items who have returned original warranty registration cards and will only be
issued where the customer calls for a RMA number before the 1 year warranty term
expires. If the item is found to be defective Tactex will replace or repair the product at
no charge except for as set forth below, provided that you deliver the item along with
the RMA number in the original container and pay the shipping charges. Tactex will not
accept the return of any product without an RMA number on the package. Tactex
reserves the right to repair or replace the unit at their discretion. Tactex warrants the
repaired or replaced unit for 90 days or the remainder of the one year warranty period,
which ever is greater. No other warranty is given or implied as to the fitness for use or
compatibility for any particular purpose of the MTC Express with any given operating
system, software or hardware configuration. Tactex may not be held responsible for
damages, loss of profits, personal injury or property damage, expense or
inconvenience or any other specific, incidental, speculative or consequential damages
caused by the use, mis-use or inability to use the MTC Express Controller and it's
bundled Software whether on account of material defect, negligence or otherwise.
The warranty is void if the MTC Express is damaged due to mis-use, abuse, alteration,
accident, electrical supply fluctuations or any other environmental occurrence. THERE
ARE NO USER SERVICEABLE PARTS INSIDE THE MTC EXPRESS UNIT. Opening
the MTC Express unit voids the warranty. This warranty is, and can only be, given by
Tactex to the original purchaser and may not be transferred. No warranty is given or
implied regarding any third party components or Software that may be bundled with the
MTC Express Controller. Notwithstanding the foregoing, Tactex Controls Inc.'s total
liability for all claims under this warranty and the agreement of purchase and sale of an
MTC Express shall not exceed the price paid for the MTC Express and shall not include
any other charges or expenses such as taxes, duties, shipping or insurance charges.
Copyright and Patents
The MTC Express user's guide and any accompanying Software and documentation
thereto is subject to copyright 1999/2000 which is owned by Tactex and may not, in
whole or in part, be copied, scanned, photocopied or otherwise duplicated in any media
digital or otherwise, without express written permission of Tactex. The ownership of all
MTC Express Software is retained without exception by Tactex Controls Inc. and is
subject to the MTC Express Software license agreement. This product is produced in
Canada under license from the Canadian Space Agency US patent 5,917,180. Other
patents pending.
Trademarks
"Smart Fabric", "Capturing Touch" and MTC Express are trademarks of Tactex
Controls Inc.. Windows and Microsoft are registered trademarks of Microsoft
Corporation, MAX and MSP are trademarks of Opcode/IRCAM/Cycling74. All other
products mentioned may be trademarks of other companies and are used for
illustrative purposes only without intent to infringe.
iv
MTC Express
Y2K
Tactex's MTC Express poses no Year 2000 issue. They are all Year 2000 Ready. While
your Tactex product is ready for the Year 2000, other parts of the computer system
which support your Tactex MTC Express, such as computer hardware, firmware,
operating systems, and software applications, may not be Year 2000 ready. Users need
to test their equipment and software, and contact the respective manufacturers of
those products for more information. Tactex expressly disclaims any warranty of nonTactex products used in conjunction with your MTC Express.
WARNING ABOUT USE
The MTC Express is intended for use as a computer input device for the purposes of
musical entertainment and graphic arts only. Tactex products are not designed or built
with components intended to ensure a level of reliability for applications where the
safety of individuals may be concerned. Do NOT use the MTC Express in clinical or
medical applications. Do NOT use the MTC Express to control moving vehicles, wheel
chairs, industrial equipment, or machinery. Do NOT use the MTC Express to control
any equipment whereby the failure of the MTC Express or Software may cause injury
to a person or damage to property.
MTC Express Software License Agreement
Your MTC Express package has been delivered with application Software on a CD.
Please read this Software license agreement ("license") carefully before installation.
By installing the Software, you are agreeing to be bound by the terms of this license.
1. License: The Software accompanying this license, whether on disk, on compact disc,
in read only memory, or any other media, and the related documentation (collectively
called, the "Tactex Software") are licensed, not sold, to you by Tactex Controls Inc.
("Tactex"). The Tactex Software in this package and any copies, modifications and
distributions which this license authorizes you to make are subject to this license.
2. Permitted uses and restrictions The Tactex Software is licensed for use exclusively
with the Tactex MTC Express. You do not have license to use all or part of the Tactex
Software in any application which does not require the user to own and operate a
Tactex MTC Express. Except as expressly permitted in this license, you may not
decompile, reverse engineer, disassemble, modify, rent, lease, loan, sublicense,
distribute or create derivative works based upon the Tactex Software in whole or part
or transmit the Tactex Software over a network or from one computer to another. Your
rights under this license will terminate automatically without notice from Tactex if you
fail to comply with any term(s) of this license. In addition, Tactex reserves the right to
terminate this license if a new version of the operating system is released which is
incompatible with the Tactex Software.
3. Disclaimer of warranty: Some of the Tactex Software may be designated as alpha,
beta, development, pre-release, untested, or not fully tested versions of the Tactex
Software. Such Tactex Software may contain errors that could cause failures or loss
of data, and may be incomplete or contain inaccuracies. You expressly acknowledge
and agree that use of the Tactex Software is at your sole risk. The Tactex Software is
provided "as is" and without warranty of any kind and Tactex and Tactex's licensor(s)
(for the purposes of sections 3 and 4, Tactex and Tactex's licensor(s) shall be
collectively referred to as "Tactex") expressly disclaim all warranties, express or
implied, including, but not limited to, the implied warranties of merchantability and
fitness for a particular purpose. Tactex does not warrant that the functions contained
in the Tactex Software will meet your requirements, or that the operation of the Tactex
Software will be uninterrupted or error-free, or that defects in the Tactex Software will
be corrected. Furthermore, Tactex does not warrant or make any representations
regarding the use or the results of the use of the Tactex Software or in terms of their
correctness, accuracy, reliability, or otherwise. No oral or written information or advice
MTC Express
given by Tactex or a Tactex authorized representative shall create a warranty or in any
way increase the scope of this warranty. Should the Tactex Software prove defective,
you (and not Tactex or a Tactex authorized representative) assume the entire cost of
all necessary servicing, repair or correction. The license fees for the Tactex Software
reflect this allocation of risk. Some jurisdictions do not allow the exclusion of implied
warranties, so the above exclusion may not apply to you.
4. Limitation of liability: Under no circumstances, shall Tactex be liable for any
incidental, special or consequential damages that result from the use or inability to use
the Tactex Software. In no event shall Tactex's total liability to you for all damages,
losses, and causes of action (whether in contract, tort (including negligence) or
otherwise) exceed the price paid for the MTC Express accompanying the Tactex
Software.
5. Controlling law and severability: If there is a local subsidiary of Tactex in the country
in which the Tactex Software license was obtained, then the local law in which the
subsidiary sits shall govern this license. Otherwise, this license shall be governed by
the laws of Canada and the Province of British Columbia. If for any reason a court of
competent jurisdiction finds any provision, or portion thereof, to be unenforceable, the
remainder of this license shall continue in full force and effect.
6. Complete agreement: This license constitutes the entire agreement between the
parties with respect to the use of the Tactex Software and supersedes all prior or
contemporaneous understandings regarding such subject matter. No amendment to or
modification of this license will be binding unless in writing and signed by Tactex.
vi

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Modify Date                     : 2000:06:02 04:31:07-07:00
Create Date                     : 2000:06:02 04:30:32-07:00
Title                           : Multi Touch Manual
Author                          : DCM
Creator                         : QuarkXPressª 4.1: LaserWriter 8 8.7
Producer                        : Acrobat Distiller 4.0 for Macintosh
Page Count                      : 18

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