extends MeshInstance

var Point = preload("res://point.tscn")

var latMin:float = 0
var latMax:float = 1
var lonMin:float = 0.0
var lonMax:float = 1.0
var resolution:int = 512
var radius:float = 10

func setParams(latMinIN, latMaxIN, lonMinIN, lonMaxIN, resolutionIN):	
	latMin = latMinIN
	latMax = latMaxIN
	lonMin = lonMinIN
	lonMax = lonMaxIN
	resolution = resolutionIN

func _ready():
	pass
	#genMesh called from chunk
	#self.genMesh()
	
func genMesh():
	print("generating Mesh:")
	print("latMin: " + str(latMin))
	print("latMax: " + str(latMax))
	print("lonMin: " + str(lonMin))
	print("lonMax: " + str(lonMax))
	print("resolution: " + str(resolution))
	
	var verts = convertToCartesian(genSphereCoords())
	var arr = []
	arr.resize(Mesh.ARRAY_MAX)
	arr[Mesh.ARRAY_VERTEX] = verts
	#arr[Mesh.ARRAY_TEX_UV] = genUV()
	arr[Mesh.ARRAY_NORMAL] = genNormals(verts)
	arr[Mesh.ARRAY_INDEX] = genIndex()
	mesh = Mesh.new()
	mesh.add_surface_from_arrays(Mesh.PRIMITIVE_TRIANGLES, arr)
	
	var drawBubbles = true
	if drawBubbles:
		var i = 0.0
		for vert in verts:
			var point = Point.instance()
			point.translate(vert)
			var mat = SpatialMaterial.new()#point.mesh.surface_get_material(0)
			mat.albedo_color = Color(i,0,0,1)
			i+=0.1
			point.mesh.surface_set_material(0,mat)
			.get_parent().add_child(point)

func genNormals(verts:PoolVector3Array):
	var normals = PoolVector3Array()
	normals.resize(len(verts))
	var v_idx = 0
	for vert in verts:
		normals[v_idx] = vert.normalized()
		v_idx+=1
	print("normals")
	print(len(normals))
	return normals

func genUV():
	var uvs = PoolVector2Array()
	uvs.resize((resolution+1) * (resolution+1))
	
	for v_idx in range(0,(resolution+1) * (resolution+1)):
		var y = v_idx / resolution
		var x = v_idx % resolution
		uvs[v_idx]=Vector2(clamp(x, 0, resolution),clamp(y, 0, resolution))
	print("uv")
	print(len(uvs))
	return uvs
	

func genIndex():
	var indices = PoolIntArray()
	indices.resize(6* ((resolution) * (resolution)))
	
	var i_idx = 0
	for row in range(0, resolution):
		for col in range(0,resolution):
			var v_idx = row*(resolution+1)+col
			
			indices[i_idx] = v_idx
			i_idx+=1
			indices[i_idx] = v_idx + resolution +1
			i_idx+=1
			indices[i_idx] = v_idx + 1
			i_idx+=1

			indices[i_idx] = v_idx + resolution+1
			i_idx+=1
			indices[i_idx] = v_idx + resolution + 2
			i_idx+=1
			indices[i_idx] = v_idx + 1
			i_idx+=1
		
	print("indices")
	print(len(indices))
	return indices
		
func genSphereCoords():
	var verts = PoolVector3Array()
	var size = (resolution+1) * (resolution+1)#(lonMax-lonMin)*resolution * (latMax-latMin)*resolution
	verts.resize(size)
	
	var lonStep = (lonMax - lonMin)/resolution
	var latStep = (latMax - latMin)/resolution
	var v_idx = 0
	for y in range(0,resolution+1):
		for x in range(0,resolution+1):
			verts[v_idx] = Vector3(latMin+latStep*y, lonMin+lonStep*x, radius)
			v_idx+=1
	#var v_idx = 0
	#var lat := float(latMin)
	#while lat <= float(latMax):
	#	var lon := float(lonMin)
	#	while lon <= float(lonMax):
	#		verts[v_idx] = Vector3(lat, lon, radius)
	#		v_idx+=1
	#		lon += (lonMax-lonMin)/resolution
	#	lat += (latMax-latMin)/resolution
	print("verts")
	print(len(verts))
	return verts


func convertToCartesian(verts:PoolVector3Array):
	var carVerts = PoolVector3Array()
	carVerts.resize(len(verts))
	var v_idx = 0
	for vert in verts:
		carVerts[v_idx] = Common.latLonToGlobal(vert.x, vert.y, vert.z, Vector3(), Vector3())
		v_idx+=1
	print("Cartesian")
	print(len(carVerts))
	return carVerts