Question about effect

Don't know... why not simply enable shader debugging and put a breakpoint in the shader code to see the value of the matrix there.

Another accident comes after this.I've got a shader compile error as below:
(403):error X4004:program too complex; there are more active values than registers, when I enabled shader debuging.The release version is OK.
Is there any limit about the .fx file line count?

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Original post by 6666662000 Another accident comes after this.I've got a shader compile error as below: (403):error X4004:program too complex; there are more active values than registers, when I enabled shader debuging.

Debug builds of FX/shaders don't tend to optimize the shaders in the same way that a release build does...

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Original post by 6666662000 Is there any limit about the .fx file line count?

No limit for the FX file, but the same shader limits apply as with non-FX based effects. For example, ps_2_0 only supports 64 arithmetic and 32 texture operations.

In your case it's probably complaining about register pressure. Each shader model has a number of temporary registers available to it - and whatever expression it's pointing to probably has more intermediary values than can be stored in the available registers. It's a bit tricky to explain - but if you read up on expression parsing you should get a rough idea of how a complex expression is broken down into many simpler ones.

hth
Jack