info.laht.threekt.lights.Light.kt Maven / Gradle / Ivy

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Port of the three.js 3D javascript library for Kotlin/JVM
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package info.laht.threekt.lights

import info.laht.threekt.core.Intersection
import info.laht.threekt.core.Object3D
import info.laht.threekt.core.Object3DImpl
import info.laht.threekt.core.Raycaster
import info.laht.threekt.math.Color
import info.laht.threekt.math.SphericalHarmonics3
import kotlin.math.PI

private const val DEFAULT_INTENSITY = 1f

interface LightWithShadow {
    val shadow: LightShadow
}

interface LightWithTarget {
    val target: Object3D
}

sealed class Light(
        color: Color? = null,
        intensity: Number? = null
) : Object3DImpl() {

    val color = color ?: Color(0xffffff)
    var intensity = intensity?.toFloat() ?: DEFAULT_INTENSITY

    init {
        receiveShadow = false
    }

    override fun raycast(raycaster: Raycaster, intersects: MutableList) {
        // empty
    }

    fun copy(source: Light): Light {
        super.copy(source, true)

        color.copy(source.color)
        this.intensity = source.intensity

        return this
    }

}

class AmbientLight(
        color: Color? = null,
        intensity: Number? = null
) : Light(color, intensity) {

    constructor(color: Int, intensity: Number? = null) : this(Color(color), intensity)

    init {
        castShadow = false
    }

}

internal class LightProbe(
        var sh: SphericalHarmonics3 = SphericalHarmonics3(),
        intensity: Number? = null
) : Light(Color(), intensity) {

    fun copy(source: LightProbe): LightProbe {
        this.sh.copy(source.sh)
        this.intensity = source.intensity

        return this
    }

}


class DirectionalLight(
        color: Color? = null,
        intensity: Number? = null
) : Light(color, intensity), LightWithShadow, LightWithTarget {

    constructor(color: Int, intensity: Number? = null) : this(Color(color), intensity)

    override var target = Object3DImpl()

    override var shadow = DirectionalLightShadow()

    init {

        this.position.copy(Object3D.defaultUp)
        this.updateMatrix()

    }

}

class PointLight(
        color: Color? = null,
        intensity: Number? = null,
        distance: Number? = null,
        decay: Number? = null
) : Light(color, intensity), LightWithShadow {

    var distance = distance?.toFloat() ?: 0f
    var decay = decay?.toFloat() ?: 1f

    override val shadow = PointLightShadow()

    constructor(
            color: Int,
            intensity: Number? = null,
            distance: Number? = null,
            decay: Number? = null
    ) : this(Color(color), intensity, distance, decay)

    fun copy(source: PointLight): PointLight {

        super.copy(source)

        this.distance = source.distance
        this.decay = source.decay

        this.shadow.copy(source.shadow)

        return this

    }

}

class RectAreaLight(
        color: Color? = null,
        intensity: Number? = null,
        width: Number? = null,
        height: Number? = null
) : Light(color, intensity) {

    var width = width?.toFloat() ?: 10f
    var height = height?.toFloat() ?: 10f

    constructor(
            color: Int,
            intensity: Number? = null,
            width: Number? = null,
            height: Number? = null
    ) : this(Color(color), intensity, width, height)

    fun copy(source: RectAreaLight): RectAreaLight {

        super.copy(source)

        this.width = source.width
        this.height = source.height

        return this

    }

}

class SpotLight(
        color: Color? = null,
        intensity: Number? = null,
        distance: Number? = null,
        angle: Number? = null,
        penumbra: Number? = null,
        decay: Number? = null
) : Light(color, intensity), LightWithShadow, LightWithTarget {

    var distance = distance?.toFloat() ?: 0f
    var angle = angle?.toFloat() ?: (PI / 3).toFloat()
    var penumbra = penumbra?.toFloat() ?: 0f
    var decay = decay?.toFloat() ?: 1f

    override var target = Object3DImpl()
    override var shadow = SpotLightShadow()

    constructor(color: Int, intensity: Number? = null,
                distance: Number? = null,
                angle: Number? = null,
                penumbra: Number? = null,
                decay: Number? = null
    ) : this(Color(color), intensity, distance, angle, penumbra, decay)

    var power: Float
        get() {
            return intensity * PI.toFloat()
        }
        set(value) {
            this.intensity = value / PI.toFloat()
        }

    constructor(color: Int, intensity: Number? = null) : this(Color(color), intensity)

    init {

        position.copy(Object3D.defaultUp)
        updateMatrix()

    }

    fun copy(source: SpotLight): SpotLight {

        super.copy(source)

        this.distance = source.distance
        this.angle = source.angle
        this.penumbra = source.penumbra
        this.decay = source.decay

        this.target = source.target.clone()

        this.shadow = source.shadow.clone()

        return this

    }

}

class HemisphereLight(
        val skyColor: Color,
        val groundColor: Color,
        intensity: Number? = null
) : Light(skyColor, intensity) {

    constructor(skyColor: Int,
                groundColor: Int,
                intensity: Number? = null
    ) : this(Color(skyColor), Color(groundColor), intensity)

    fun copy(source: HemisphereLight): HemisphereLight {

        super.copy(source)

        groundColor.copy(source.groundColor)

        return this

    }

}