commonMain.earth.worldwind.shape.SurfaceImage.kt Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of worldwind-jvm Show documentation

The WorldWind Kotlin SDK (WWK) includes the library, examples and tutorials for building multiplatform 3D virtual globe applications for Android, Web and Java.

The newest version!

package earth.worldwind.shape

import earth.worldwind.PickedObject
import earth.worldwind.draw.DrawableSurfaceTexture
import earth.worldwind.geom.Sector
import earth.worldwind.render.AbstractSurfaceRenderable
import earth.worldwind.render.RenderContext
import earth.worldwind.render.image.ImageOptions
import earth.worldwind.render.image.ImageSource
import earth.worldwind.render.program.SurfaceTextureProgram

open class SurfaceImage(sector: Sector, var imageSource: ImageSource): AbstractSurfaceRenderable(sector, "Surface Image") {
    var imageOptions: ImageOptions? = null
    protected val terrainSector = Sector()

    override fun doRender(rc: RenderContext) {
        terrainSector.copy(sector)
        if (terrainSector.isEmpty || !terrainSector.intersect(rc.terrain.sector) || !getExtent(rc).intersectsFrustum(rc.frustum)) return
        val texture = rc.getTexture(imageSource, imageOptions) ?: return // no texture to draw
        val opacity = if (rc.isPickMode) 1f else rc.currentLayer.opacity

        // Enqueue a drawable surface texture for processing on the OpenGL thread.
        val program = getShaderProgram(rc)
        val pool = rc.getDrawablePool()
        val drawable = DrawableSurfaceTexture.obtain(pool).set(
            program, sector, opacity, texture, texture.coordTransform, rc.globe.offset, terrainSector
        )
        rc.offerSurfaceDrawable(drawable, 0.0 /*z-order*/)

        // Enqueue a picked object that associates the drawable surface texture with this surface image.
        if (rc.isPickMode) {
            val pickedObjectId = rc.nextPickedObjectId()
            PickedObject.identifierToUniqueColor(pickedObjectId, drawable.color)
            rc.offerPickedObject(PickedObject.fromRenderable(pickedObjectId, this, rc.currentLayer))
        }
    }

    protected open fun getShaderProgram(rc: RenderContext) = rc.getShaderProgram { SurfaceTextureProgram() }
}