Initial commit with correct working GD script

icon.svg

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+<svg xmlns="http://www.w3.org/2000/svg" width="128" height="128"><rect width="124" height="124" x="2" y="2" fill="#363d52" stroke="#212532" stroke-width="4" rx="14"/><g fill="#fff" transform="translate(12.322 12.322)scale(.101)"><path d="M105 673v33q407 354 814 0v-33z"/><path fill="#478cbf" d="m105 673 152 14q12 1 15 14l4 67 132 10 8-61q2-11 15-15h162q13 4 15 15l8 61 132-10 4-67q3-13 15-14l152-14V427q30-39 56-81-35-59-83-108-43 20-82 47-40-37-88-64 7-51 8-102-59-28-123-42-26 43-46 89-49-7-98 0-20-46-46-89-64 14-123 42 1 51 8 102-48 27-88 64-39-27-82-47-48 49-83 108 26 42 56 81zm0 33v39c0 276 813 276 814 0v-39l-134 12-5 69q-2 10-14 13l-162 11q-12 0-16-11l-10-65H446l-10 65q-4 11-16 11l-162-11q-12-3-14-13l-5-69z"/><path d="M483 600c0 34 58 34 58 0v-86c0-34-58-34-58 0z"/><circle cx="725" cy="526" r="90"/><circle cx="299" cy="526" r="90"/></g><g fill="#414042" transform="translate(12.322 12.322)scale(.101)"><circle cx="307" cy="532" r="60"/><circle cx="717" cy="532" r="60"/></g></svg>

icon.svg.import

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+[remap]
+
+importer="texture"
+type="CompressedTexture2D"
+uid="uid://516p06wj654n"
+path="res://.godot/imported/icon.svg-218a8f2b3041327d8a5756f3a245f83b.ctex"
+metadata={
+"vram_texture": false
+}
+
+[deps]
+
+source_file="res://icon.svg"
+dest_files=["res://.godot/imported/icon.svg-218a8f2b3041327d8a5756f3a245f83b.ctex"]
+
+[params]
+
+compress/mode=0
+compress/high_quality=false
+compress/lossy_quality=0.7
+compress/hdr_compression=1
+compress/normal_map=0
+compress/channel_pack=0
+mipmaps/generate=false
+mipmaps/limit=-1
+roughness/mode=0
+roughness/src_normal=""
+process/fix_alpha_border=true
+process/premult_alpha=false
+process/normal_map_invert_y=false
+process/hdr_as_srgb=false
+process/hdr_clamp_exposure=false
+process/size_limit=0
+detect_3d/compress_to=1
+svg/scale=1.0
+editor/scale_with_editor_scale=false
+editor/convert_colors_with_editor_theme=false

lidar.gd

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+@tool
+extends MeshInstance3D
+@export var update=false
+
+var height = Array()
+var grid
+var lng_w
+var lat_l = 111.321
+var v_step
+var h_step
+
+# Called when the node enters the scene tree for the first time.
+func _ready() -> void:
+	_getHeights()
+	_widthOfLongitude(51)
+	v_step = grid / lat_l
+	h_step = ((lng_w/1000) / lat_l) * v_step
+	_generateTerrain()
+
+
+func _getHeights():
+	if FileAccess.file_exists("res://N51E007.hgt"):
+		var file = FileAccess.open("res://N51E007.hgt", FileAccess.READ)
+		file.big_endian = true
+		var size = file.get_length()
+		grid = int(sqrt(size/2))
+		#uv_step = 1 / grid
+		for x in range(0, grid):
+			var row = Array()
+			for y in range(0, grid):
+				row.append(file.get_16())
+			height.append(row)
+		height.reverse()
+
+
+func _widthOfLongitude(lng):
+	var dm = cos(deg_to_rad(lng)) * lat_l
+	lng_w = round(dm * 1000)
+
+
+func _generateTerrain():
+	var a_mesh = ArrayMesh.new()
+	var verts := PackedVector3Array()
+	var indices := PackedInt32Array()
+	var normals := PackedVector3Array()
+	var curind = 0
+	
+	for x in range(0, grid-2):
+		for y in range(0, grid-2):
+			var xp = x*h_step
+			var yp = y*v_step
+			var v1 = Vector3(xp, _getHeight(x, y), -yp)
+			var v2 = Vector3(xp, _getHeight(x, y+1), -yp-v_step)
+			var v3 = Vector3(xp+h_step, _getHeight(x+1, y), -yp)
+			
+			var side1 = v2-v1
+			var side2 = v2-v3
+			var normal1 = side1.cross(side2)
+			
+			var v4 = Vector3(xp, _getHeight(x, y+1), -yp-v_step)
+			var v5 = Vector3(xp+h_step, _getHeight(x+1, y+1), -yp-v_step)
+			var v6 = Vector3(xp+h_step, _getHeight(x+1, y), -yp)
+			
+			var side3 = v5-v4
+			var side4 = v5-v6
+			var normal2 = side3.cross(side4)
+			
+			verts.append(v1)
+			verts.append(v2)
+			verts.append(v3)
+			verts.append(v4)
+			verts.append(v5)
+			verts.append(v6)
+			
+			normals.append(normal1)
+			normals.append(normal1)
+			normals.append(normal1)
+			normals.append(normal2)
+			normals.append(normal2)
+			normals.append(normal2)
+			
+			indices.append(curind+0)
+			indices.append(curind+1)
+			indices.append(curind+2)
+			indices.append(curind+3)
+			indices.append(curind+4)
+			indices.append(curind+5)
+			curind = curind+6
+	
+	var array = []
+	array.resize(Mesh.ARRAY_MAX)
+	array[Mesh.ARRAY_VERTEX] = verts
+	array[Mesh.ARRAY_INDEX] = indices
+	array[Mesh.ARRAY_NORMAL] = normals
+	a_mesh.add_surface_from_arrays(Mesh.PRIMITIVE_TRIANGLES, array)
+	mesh = a_mesh
+
+
+
+func _getHeight(x, y):
+	return height[y][x]
+
+
+# Called every frame. 'delta' is the elapsed time since the previous frame.
+func _process(delta: float) -> void:
+	pass

lidar.tres

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+[gd_resource type="StandardMaterial3D" format=3 uid="uid://csub3tefbxyos"]
+
+[resource]
+emission = Color(1, 1, 1, 1)

lidar.tscn

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+[gd_scene load_steps=4 format=3 uid="uid://bycv6uqx3ruk8"]
+
+[ext_resource type="Script" path="res://lidar.gd" id="1_54dbw"]
+
+[sub_resource type="Environment" id="Environment_ngpq5"]
+background_mode = 1
+background_color = Color(0.58581, 0.673741, 0.868176, 1)
+
+[sub_resource type="CameraAttributesPractical" id="CameraAttributesPractical_c0u6f"]
+
+[node name="Node3D" type="Node3D"]
+
+[node name="MeshInstance3D" type="MeshInstance3D" parent="."]
+script = ExtResource("1_54dbw")
+
+[node name="Camera3D" type="Camera3D" parent="."]
+transform = Transform3D(-1, -8.74228e-08, 2.5411e-21, -3.82137e-15, 4.37114e-08, 1, -8.74228e-08, 1, -4.37114e-08, 0, 99.8156, 0)
+current = true
+far = 60000.0
+
+[node name="WorldEnvironment" type="WorldEnvironment" parent="."]
+environment = SubResource("Environment_ngpq5")
+camera_attributes = SubResource("CameraAttributesPractical_c0u6f")
+
+[node name="DirectionalLight3D" type="DirectionalLight3D" parent="."]
+transform = Transform3D(1, 0, 0, 0, 0.72118, 0.692748, 0, -0.692748, 0.72118, 16.4428, 103.755, 12.2305)
+light_energy = 0.405
+shadow_enabled = true

project.godot

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+; Engine configuration file.
+; It's best edited using the editor UI and not directly,
+; since the parameters that go here are not all obvious.
+;
+; Format:
+;   [section] ; section goes between []
+;   param=value ; assign values to parameters
+
+config_version=5
+
+[application]
+
+config/name="lidar"
+run/main_scene="res://lidar.tscn"
+config/features=PackedStringArray("4.3", "Forward Plus")
+config/icon="res://icon.svg"