forked from kscience/visionforge
61 lines
2.4 KiB
Plaintext
61 lines
2.4 KiB
Plaintext
## Inheritance
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Inheritance is an ability of an element to transfer a pack of properties to its `children` elements 'wrapped inside'.
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Properties have to be set in a specific order:
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### Main properties' inheritance:
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* styles
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* parents
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* parent's styles
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* defaults
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As for `prototypes`, this property has to be set after styles, but before parents. So the order will be this:
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### Reference properties' inheritance:
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* styles
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* prototypes
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* parents
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* parent's styles
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* defaults
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------------------------
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Let's take a closer look using a [Muon Monitor Visualization](demo/muon-monitor/README.md).
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Running the demo, we will see this:
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You can see a tree of elements on the left; 'World' is a `root`, 'bottom', 'middle', and 'top' are 'World's `children` and so on.
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On the right, there is a list with changeable properties.
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Properties, which can or cannot be inherited, are these:
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* `visible` - toggles the visibility of an element. To be exact, the invisibility of an element is inheritable.
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If a `parent` element is invisible, other elements are invisible as well, and they cannot be changed to visible mode.
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* `material` - a group of properties, which can be inherited and which can be changed in `children` elements.
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* `color` - color of an element.
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Let's see how elements of the `material` group inherits changing `color` property; other properties of the same group inherits in the same way.
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Let's change color of 'World' element.
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It is a `parent`, so 'bottom', 'middle', and 'top' elements inherit this color.
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Now, let's change 'top's color.
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It changes only, 'bottom' and 'middle' stays the same.
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'top' is a `parent` element as well: it has `children` - 'SC72', 'SC73', ... ,'SC80'. Let's change the color of 'SC76'.
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* `opacity` - a number from 0 to 1 which represents percents of opacity (0 for 0%, 1 for 100%).
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* `wireframe` - toggles the wireframe mode.
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* `rotation` - rotation of an element. Here, it is set by `x` value. It is inheritable and unable to be changed in `children` elements.
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* `position` - position of an element, cannot be inherited.
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