various fixes / additions to math node. --- Pass 1

[zeffii]

pushing early to have something to work with..

See below a list of issues encountered during rudimentary testing. Some of these will make it into the eventual docs highlighting the potentially unexpected behavior.

---

The modes of math node

• SQRT
• NEG
• SUB
• MUL
• ADD
• DIV
  • div autoconverts for instance 180/60 into 3. (float) ... use INTDIV if you know that the two values will divide without remainder, or if you don't care about the remainder.
• ABS
• CEIL
  • outputs a float
• COPY SIGN
  • copysign autoconverts ints to float output. (I think this is not expected behaviour)
• ROUND-N
• FMOD
• MODULO
• FLOOR
• EXP
• LN
• LOG1P
• LOG10
• INTDIV
• POW
• E
• MIN
• MAX
• 1/x

are not implemented in this node, instead their counterparts use sane defaults to produce the same results.

• ROUND
• POW2
• -1
• +1
• *2
• /2

[zeffii]

I think we can economise a little in the following ways, reducing the number of items will make the whole menu more compact and put the default values to good use.

instead of having ADD and +1 , the default to Y in Add could be 1 (one less mode)
instead of having SUB and -1 , the default to Y in Add could be 1 (one less mode)
instead of having MUL and *2 , the default to Y in Add could be 2 (one less mode)
instead of having DIV and /2 , the default to Y in Add could be 2 (one less mode)
instead of having ROUND and ROUND_N, just have round N with a default Y 0. (one less mode)
instead of having POW and POW2, just have POW with a default Y 2. (one less mode)..

6 fewer nodes :)

Done

[zeffii]

on the other hand... sometimes you do kind of want to lock a node's input to remind your future self not to change it.

[ly29]

Having the extra modes brings a slight cost.

[zeffii]

it's all there now, bugs might be lurking :)