import org.openrndr.WindowMultisample
import org.openrndr.application
import org.openrndr.draw.DrawPrimitive
import org.openrndr.draw.isolated
import org.openrndr.draw.shadeStyle
import org.openrndr.extra.camera.Orbital
import org.openrndr.extra.mesh.noise.hash
import org.openrndr.extra.objloader.loadOBJMeshData
import org.openrndr.extra.meshgenerators.sphereMesh
import org.openrndr.math.Vector3
import java.io.File
import kotlin.math.cos

/**
 * Demonstrate uniform point on mesh generation using hash functions
 */
fun main() = application {
    configure {
        width = 720
        height = 720
        multisample = WindowMultisample.SampleCount(8)
    }
    program {
        val mesh = loadOBJMeshData(File("demo-data/obj-models/suzanne/Suzanne.obj")).toMeshData()

        val sphere = sphereMesh(radius = 0.01)
        extend(Orbital()) {
            eye = Vector3(0.0, 0.0, 2.0)
        }
        extend {
            val points = mesh.hash((1000 + (cos(seconds) * 0.5 + 0.5) * 9000).toInt(), 808, (seconds * 1).toInt())
            drawer.shadeStyle = shadeStyle {
                fragmentTransform = "x_fill = vec4(v_viewNormal*0.5+0.5, 1.0);"
            }
            for (point in points) drawer.isolated {
                drawer.translate(point)
                drawer.vertexBuffer(sphere, DrawPrimitive.TRIANGLES)
            }
        }
    }
}