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XML:OBAN: Difference between revisions
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** this would be very useful for editing/creating single OBAN files if the rest of the level don't need changes | ** this would be very useful for editing/creating single OBAN files if the rest of the level don't need changes | ||
===calculating a transform matrix step by step=== | |||
In some scenarios we need to build a new transform matrix, e.g. when making a new weapon particle emitter. | |||
Those commands can be used to examine OniSplit's matrix calculation. | |||
onisplit -create:oban OBAN OBAN/file.dae | |||
onisplit -extract:xml OBAN OBAN/OBANfile.oni | |||
Let's test some values. | |||
xyz = 0 | |||
<InitialTransform>1 0 0 0 1 0 0 0 1 0 0 0</InitialTransform> | |||
This doesn't tell us very much, at least we know that the last 3 value are positions. | |||
{| class="wikitable" style="float:right; text-align:right" | |||
| This formula is involved in building such matrix. | |||
https://dl.dropboxusercontent.com/u/139715/OniGalore/rotation_of_transform_matrix.png | |||
|} | |||
So the first 9 values have to contain the rotation. | |||
x = 60 | |||
<InitialTransform><span style="background-color:#F77">1 0 0</span> <span style="background-color:#7F7">0 0.5 0.8660254</span> <span style="background-color:#77F">0 -0.8660254 0.5</span> <font style="color:#AAAAAA">0 0 0</font></InitialTransform> | |||
<span style="background-color:#F77">1 0 0</span> <span style="background-color:#7F7">0 cos(x) sin(x)</span> <span style="background-color:#77F">0 -sin(x) cos(x)<span> | |||
y = 60 | |||
<InitialTransform><span style="background-color:#FF7">0.5 0 -0.8660254</span> <span style="background-color:#F7F">0 1 0</span> <span style="background-color:#7FF">0.8660254 0 0.5</span> <font style="color:#AAAAAA">0 0 0</font></InitialTransform> | |||
<span style="background-color:#FF7">cos(y) 0 -sin(y)</span> <span style="background-color:#F7F">0 1 0</span> <span style="background-color:#7FF">sin(y) 0 cos(y)</span> | |||
z = 60 | |||
<InitialTransform><span style="background-color:#777">0.5 0.8660254 0</span> <span style="background-color:#AAA">-0.8660254 0.5 0</span> <span style="background-color:#DDD">0 0 1</span> <font style="color:#AAAAAA">0 0 0</font></InitialTransform> | |||
<span style="background-color:#777">cos(z) sin(z) 0</span> <span style="background-color:#AAA">-sin(z) cos(z) 0</span> <span style="background-color:#DDD">0 0 1</span> | |||
x = 60; y = 40 | |||
<InitialTransform>0.7660444 0.5566704 -0.321393818 0 0.5 0.8660254 0.6427877 -0.663413942 0.3830222 <font style="color:#AAAAAA">0 0 0</font></InitialTransform> | |||
cos(y) sin(x)*sin(y) -cos(x)*sin(y) 0 cos(x) sin(x) sin(y) -sin(x)*cos(y) cos(x)*cos(y) | |||
cos(y) -sin(x)*-sin(y) -cos(x)*sin(y) 0 cos(x) sin(x) sin(y) -sin(x)*cos(y) cos(x)*cos(y) | |||
x = 60; z = 40 | |||
<InitialTransform>0.7660444 0.321393818 0.5566704 -0.6427877 0.3830222 0.663413942 0 -0.8660254 0.5 <font style="color:#AAAAAA">0 0 0</font></InitialTransform> | |||
cos(z) cos(x)*sin(z) sin(x)*sin(z) -sin(z) cos(x)*cos(z) sin(x)*cos(z) 0 -sin(x) cos(x) | |||
cos(z) cos(x)*sin(z) -sin(x)*-sin(z) -sin(z) cos(x)*cos(z) sin(x)*cos(z) 0 -sin(x) cos(x) | |||
y = 60; z = 40 | |||
<InitialTransform>0.3830222 0.6427877 -0.663413942 -0.321393818 0.7660444 0.5566704 0.8660254 0 0.5 <font style="color:#AAAAAA">0 0 0</font></InitialTransform> | |||
cos(y)*cos(z) sin(z) -sin(y)*cos(z) cos(y)*-sin(z) cos(z) sin(y)*sin(z) sin(y) 0 cos(y) | |||
cos(x)*cos(z) sin(z) -sin(y)*cos(z) cos(y)*-sin(z) cos(z) -sin(y)*-sin(z) sin(y) 0 cos(y) | |||
x = 60; y = 40; z = 20 | |||
<InitialTransform>0.719846249 0.6941092 -0.005813241 -0.262002677 0.279453874 0.9237208 0.642787635 -0.6634138 0.3830223 <font style="color:#AAAAAA">0 0 0</font></InitialTransform> | |||
cos(y)*cos(z) cos(x)*cos(y) | |||
{{XML}} | {{XML}} | ||