info.laht.threekt.objects.Sprite.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.objects

import info.laht.threekt.core.*
import info.laht.threekt.materials.SpriteMaterial
import info.laht.threekt.math.Frustum
import info.laht.threekt.math.Sphere
import info.laht.threekt.math.Vector2

class Sprite(
    override var material: SpriteMaterial = SpriteMaterial()
) : Object3DImpl(), GeometryObject, MaterialObject {

    override var geometry = BufferGeometry()

    val center = Vector2(0.5f, 0.5f)

    init {

        val float32Array = floatArrayOf(
            -0.5f, -0.5f, 0f, 0f, 0f,
            0.5f, -0.5f, 0f, 1f, 0f,
            0.5f, 0.5f, 0f, 1f, 1f,
            -0.5f, 0.5f, 0f, 0f, 1f
        )

        geometry.setIndex(IntBufferAttribute(intArrayOf(0, 1, 2, 0, 2, 3), 1))

        TODO("Sprite not implemented yet")

//        geometry.addAttribute( "position",  InterleavedBufferAttribute( interleavedBuffer, 3, 0, false ) );
//        geometry.addAttribute( "uv",  InterleavedBufferAttribute( interleavedBuffer, 2, 3, false ) );


    }

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

}

fun Frustum.intersectsSprite(sprite: Sprite): Boolean {

    val sphere = Sphere()

    sphere.center.set(0f, 0f, 0f)
    sphere.radius = 0.7071067811865476f
    sphere.applyMatrix4(sprite.matrixWorld)

    return this.intersectsSphere(sphere)

}