58 lines
1.9 KiB
Kotlin
58 lines
1.9 KiB
Kotlin
import org.openrndr.application
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import org.openrndr.color.ColorRGBa
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import org.openrndr.draw.createEquivalent
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import org.openrndr.drawImage
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import org.openrndr.extra.fx.blend.BlendSpectral
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import org.openrndr.extra.fx.blur.BoxBlur
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import org.openrndr.extra.fx.patterns.Checkers
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import org.openrndr.math.Vector2
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import kotlin.math.sin
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/**
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* Demonstration of how to use the [BlendSpectral] filter to combine two images, using
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* this pigment-simulation color mixing approach.
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*
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* The program:
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* - generates two images
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* - blurs one of them
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* - creates and draws a checkers-pattern as the background
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* - mixes and draws both images
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*
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* The `fill` factor, which controls how the top and the bottom colors are mixed, is animated.
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*
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* The `clip` parameter is also animated and toggles every 6 seconds.
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*/
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fun main() = application {
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configure {
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width = 800
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height = 800
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}
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program {
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val a = drawImage(width, height) {
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drawer.stroke = null
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drawer.fill = ColorRGBa.BLUE
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drawer.circle(drawer.bounds.center - Vector2(100.0, 0.0), drawer.width * 0.25)
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}
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val b = drawImage(width, height) {
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drawer.clear(ColorRGBa.TRANSPARENT)
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drawer.stroke = ColorRGBa.RED
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drawer.strokeWeight = 10.0
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drawer.fill = ColorRGBa.YELLOW.opacify(1.0)
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drawer.circle(drawer.bounds.center + Vector2(100.0, 0.0), drawer.width * 0.25)
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}
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BoxBlur().apply { window = 10 }.apply(b, b)
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val checked = a.createEquivalent()
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Checkers().apply(emptyArray(), checked)
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val mixed = a.createEquivalent()
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val blendSpectral = BlendSpectral()
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extend {
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drawer.image(checked)
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blendSpectral.fill = sin(seconds) * 0.5 + 0.5
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blendSpectral.clip = seconds.mod(12.0) > 6.0
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blendSpectral.apply(a, b, mixed)
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drawer.image(mixed)
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}
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}
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}
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