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How to manipulate Canvas elements: Difference between revisions
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How to manipulate Canvas elements (view source)
Revision as of 17:23, 7 December 2017
, 7 December 2017→Intrinsic Coordenates
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<syntaxhighlight> | <syntaxhighlight> | ||
arrow.setTranslation(150, 80); | arrow.setTranslation(150, 80); | ||
</syntaxhighlight>[[File: | </syntaxhighlight>[[File:Translated01.png|none|Translated arrow]] | ||
The blue axis and labels are showing the <span style="background: white; color: blue">( '''u, v''' )</span> <big>absolute</big> coodinate system.<br /> | The blue axis and labels are showing the <span style="background: white; color: blue">( '''u, v''' )</span> <big>absolute</big> coodinate system.<br /> | ||
Note that the translated arrow has brought with him his intrinsic coordenate system and his BoundingBox remains unchanged.<br /> | Note that the translated arrow has brought with him his intrinsic coordenate system and his BoundingBox remains unchanged.<br /> | ||
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<big>'''''u = T<sub>x</sub> + x'''''</big> | <big>'''''u = T<sub>x</sub> + x'''''</big> | ||
<big>'''''v = T<sub>y</sub> + y'''''</big> | <big>'''''v = T<sub>y</sub> + y'''''</big> | ||
In a similar way, scaling works. Type: | |||
<syntaxhighlight> | |||
arrow.setTranslation(0,0); | |||
arrow.setScale(1.5,2); | |||
arrow.getScale(); | |||
</syntaxhighlight> you get ''[9.5,19.5, 120.5,40.5]'' which are the values for [Sx, Sy].<br /> | |||
Again, the BoundingBox and the intrinsic coordenate system remains unchanged.<br /> | |||