commonMain.de.fabmax.kool.physics.geometry.BoxGeometry.kt Maven / Gradle / Ivy

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A multiplatform OpenGL / Vulkan graphics engine written in kotlin

There is a newer version: 0.15.1

package de.fabmax.kool.physics.geometry

import de.fabmax.kool.math.MutableVec3f
import de.fabmax.kool.math.Vec3f
import de.fabmax.kool.math.spatial.BoundingBoxF
import de.fabmax.kool.scene.geometry.MeshBuilder

expect fun BoxGeometry(size: Vec3f) : BoxGeometry

interface BoxGeometry : CollisionGeometry {
    val size: Vec3f

    override fun generateMesh(target: MeshBuilder) {
        target.cube {
            size.set([email protected])
        }
    }

    override fun getBounds(result: BoundingBoxF): BoundingBoxF {
        result.set(-size.x * 0.5f, -size.y * 0.5f, -size.z * 0.5f,
            size.x * 0.5f, size.y * 0.5f, size.z * 0.5f)
        return result
    }

    override fun estimateInertiaForMass(mass: Float, result: MutableVec3f): MutableVec3f {
        result.x = (mass / 12f) * (size.y * size.y + size.z * size.z)
        result.y = (mass / 12f) * (size.x * size.x + size.z * size.z)
        result.z = (mass / 12f) * (size.x * size.x + size.y * size.y)
        return result
    }
}