60 lines
1.5 KiB
Markdown
60 lines
1.5 KiB
Markdown
# orx-no-clear
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Provides the classical "draw-without-clearing-the-screen" functionality.
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#### Usage
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```kotlin
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fun main() = application {
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configure {
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title = "NoClearProgram"
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}
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program {
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backgroundColor = ColorRGBa.PINK
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extend(NoClear())
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extend {
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drawer.circle(Math.cos(seconds) * width / 2.0 + width / 2.0, Math.sin(seconds * 0.24) * height / 2.0 + height / 2.0, 20.0)
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}
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}
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}
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```
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#### Usage with additional configuration
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Optionally, a static `backdrop` may be setup by providing custom code.
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- Example 1. Customising the backdrop with an image
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```kotlin
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extend(NoClear()) {
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val img = loadImage("data/backdrop.png")
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backdrop = {
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drawer.image(img, 0.0, 0.0, width * 1.0, height * 1.0)
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}
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}
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```
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- Example 2. Customising the backdrop with a checker-board pattern
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```kotlin
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extend(NoClear()) {
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backdrop = {
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val xw = width / 8.0
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val yh = height / 8.0
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drawer.fill = ColorRGBa.RED
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(0..7).forEach { row ->
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(0..7).forEach { col ->
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if ((row + col) % 2 == 0) {
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drawer.rectangle(row * xw, col * yh, xw, yh)
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}
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}
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}
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}
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}
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```
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NB! any submitted _lambda expression_ must be valid within the `renderTarget` context.
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<!-- __demos__ -->
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## Demos
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### DemoNoClear
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[source code](src/jvmDemo/kotlin/DemoNoClear.kt)
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