=> R0 = pointer to TMmemoryblock
R2 = pointer to objects to alter
R4 = reason code
R5 = pointer to transform block
This call allows you to move, rotate and scale objects. It works over selected objects (so you first have to select something) but it can affect numbered groups only (both selected or unselected).
Gemini_Transform memory block
The transformation block is filled with geometric data for the operation (all the values are multiplied by 2^17, i.e. original value = 0.5, value to store = 0.5 * 2^17)
Offset Translate Scale General transform
+0 amount to add to X coord X coord of the point around which the operation takes place
+4 amount to add to Y coord Y coord of the point around which the operation takes place
+8 amount to add to Z coord Z coord of the point around which the operation takes place
+12 - X scale factor A1,1 component of the transformation matrix
+16 - Y scale factor A2,1
+20 - Z scale factor A3,1
+24 - - A1,2
+28 - - A2,2
+32 - - A3,2
+36 - - A1,3
+40 - - A2,3
+44 - - A3,3
+48 - - amount to add to X coord
+52 - - amount to add to Y coord
+56 - - amount to add to Z coord
The general transformation acts as follows: first of all the object is modified accordingly to the 3x3 matrix (around the specified point), then it is translated by the amount specified in (+48, +52, +56)
Gemini_Transform objects to alter
Code meaning
0 modify selected objects (you have to select something first)
n logical number of the group to be modified (no need to select it)
Gemini_Transform reason code
Reason meaning
0 translate objects/group
1 scale objects/group
2 transform objects/group using a general transformation matrix
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