Missile with Exhaust Effects

Created a missile model with 4 exhausts in Blender and imported it with collision shapes (not tested yet if they work).
Created an exhaust shader with a simple particle trail. The shader that creates the exhaust flame can be adapted to the missile burn power.

assets/entities/missile/missile_albedo.png.import

@@ -0,0 +1,37 @@
+[remap]
+
+importer="texture"
+type="StreamTexture"
+path.s3tc="res://.import/missile_albedo.png-2cb94eaa9de484fd50d1215f51f806b4.s3tc.stex"
+path.etc2="res://.import/missile_albedo.png-2cb94eaa9de484fd50d1215f51f806b4.etc2.stex"
+metadata={
+"imported_formats": [ "s3tc", "etc2" ],
+"vram_texture": true
+}
+
+[deps]
+
+source_file="res://assets/entities/missile/missile_albedo.png"
+dest_files=[ "res://.import/missile_albedo.png-2cb94eaa9de484fd50d1215f51f806b4.s3tc.stex", "res://.import/missile_albedo.png-2cb94eaa9de484fd50d1215f51f806b4.etc2.stex" ]
+
+[params]
+
+compress/mode=2
+compress/lossy_quality=0.7
+compress/hdr_mode=0
+compress/bptc_ldr=0
+compress/normal_map=0
+flags/repeat=true
+flags/filter=true
+flags/mipmaps=true
+flags/anisotropic=false
+flags/srgb=1
+process/fix_alpha_border=true
+process/premult_alpha=false
+process/HDR_as_SRGB=false
+process/invert_color=false
+process/normal_map_invert_y=false
+stream=false
+size_limit=0
+detect_3d=false
+svg/scale=1.0

project.godot

@@ -14,6 +14,10 @@ config/name="GeneticMayham"
 run/main_scene="res://scenes/space.tscn"
 config/icon="res://icon.png"
 
+[global]
+
+viewport=false
+
 [gui]
 
 common/drop_mouse_on_gui_input_disabled=true

scenes/entities/DebugLookAtTarget.gd

@@ -1,10 +1,10 @@
 extends Position3D
 
 
-var maxX = 10
+var maxX = 20
-var minX = -10
+var minX = -20
 
-var SPEED = 1
+var SPEED = 10
 
 var state = -1
 

scenes/entities/TurretVision.gd

@@ -0,0 +1,15 @@
+extends Area
+
+onready var turret_main = get_node("../../../../")
+
+var seen_nodes = []
+
+func body_entered(body: Node):
+	print(body.name+" just entered the vision!")
+	seen_nodes.append(body)
+
+func body_exited(body: Node):
+	seen_nodes.remove(body)
+	
+func _ready():
+	pass

scenes/entities/missile.gd

@@ -0,0 +1,19 @@
+extends Spatial
+
+
+onready var exhaust_node = $Exhaust;
+
+var exhausts = ["Exhaust", "Exhaust2", "Exhaust3", "Exhaust4"]
+
+func change_engine_power(power):
+	var MAX_POWER = 10;
+	print("Changing missile exhaust to: ", power);
+	for e in exhausts:
+		var node: MeshInstance = exhaust_node.get_node("./"+e);
+		node.get_active_material(0).set_shader_param("power", clamp(power, .0, MAX_POWER));
+	
+
+
+func _ready():
+	pass;
+	#change_engine_power(10);

scenes/entities/missile.tscn

@@ -0,0 +1,136 @@
+[gd_scene load_steps=13 format=2]
+
+[ext_resource path="res://assets/entities/missile/missile.glb" type="PackedScene" id=1]
+[ext_resource path="res://assets/entities/missile/missile_albedo.png" type="Texture" id=2]
+[ext_resource path="res://scenes/entities/missile.gd" type="Script" id=3]
+[ext_resource path="res://scenes/entities/missiles/missile_exhaust.gdshader" type="Shader" id=4]
+
+[sub_resource type="SpatialMaterial" id=2]
+albedo_texture = ExtResource( 2 )
+metallic = 1.0
+roughness = 0.41
+
+[sub_resource type="CapsuleShape" id=1]
+height = 10.1286
+
+[sub_resource type="ShaderMaterial" id=8]
+shader = ExtResource( 4 )
+shader_param/ANIM_SPEED = 100.0
+shader_param/hot_color = Color( 0.9, 0.9, 9, 0.5 )
+shader_param/cold_color = Color( 1, 1, 1, 0 )
+shader_param/power = 1.0
+
+[sub_resource type="SphereMesh" id=9]
+material = SubResource( 8 )
+radius = 0.35
+height = 0.5
+radial_segments = 128
+rings = 64
+
+[sub_resource type="ParticlesMaterial" id=3]
+emission_shape = 1
+emission_sphere_radius = 0.25
+gravity = Vector3( 0, 40, 0 )
+
+[sub_resource type="Shader" id=5]
+code = "shader_type spatial;
+render_mode depth_draw_opaque, unshaded, shadows_disabled;
+
+uniform float MIX = 1.;
+uniform float particle_alpha: hint_range(0.0, 1.0) = 1.0;
+uniform vec4 top_color: hint_color = vec4(.2, .5, .8, 0.3);
+uniform vec4 bot_color: hint_color = vec4(.2, .5, .8, 1);
+
+void fragment() {
+	vec4 exhaust_color = mix(top_color, bot_color, .5);
+	
+	ALPHA = exhaust_color.a;
+	ALBEDO = exhaust_color.rgb;
+}
+"
+
+[sub_resource type="ShaderMaterial" id=6]
+shader = SubResource( 5 )
+shader_param/MIX = 1.0
+shader_param/particle_alpha = 1.0
+shader_param/top_color = Color( 0.2, 0.5, 0.8, 0.3 )
+shader_param/bot_color = Color( 0.2, 0.5, 0.8, 1 )
+
+[sub_resource type="SphereMesh" id=4]
+material = SubResource( 6 )
+radius = 0.025
+height = 0.05
+radial_segments = 32
+rings = 16
+
+[node name="missile" instance=ExtResource( 1 )]
+script = ExtResource( 3 )
+
+[node name="missile body" parent="." index="0"]
+material/0 = SubResource( 2 )
+
+[node name="RigidBody" type="RigidBody" parent="." index="1"]
+
+[node name="CollisionShape" type="CollisionShape" parent="RigidBody" index="0"]
+transform = Transform( 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0.371096 )
+shape = SubResource( 1 )
+
+[node name="Exhaust" type="Spatial" parent="." index="2"]
+transform = Transform( 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, -4.901 )
+
+[node name="Exhaust" type="MeshInstance" parent="Exhaust" index="0"]
+transform = Transform( 1, 0, 0, 0, -4.37114e-08, -1, 0, 1, -4.37114e-08, 0.5, 0.5, 0.1 )
+mesh = SubResource( 9 )
+
+[node name="Particles" type="Particles" parent="Exhaust/Exhaust" index="0"]
+visible = false
+cast_shadow = 0
+amount = 50
+lifetime = 3.0
+visibility_aabb = AABB( nan, 0.05694, -7.38708, 0.867362, 0.904675, 14.7742 )
+process_material = SubResource( 3 )
+draw_pass_1 = SubResource( 4 )
+
+[node name="Exhaust2" type="MeshInstance" parent="Exhaust" index="1"]
+transform = Transform( 1, 0, 0, 0, -4.37114e-08, -1, 0, 1, -4.37114e-08, -0.5, 0.5, 0.1 )
+mesh = SubResource( 9 )
+skeleton = NodePath("../Exhaust")
+
+[node name="Particles" type="Particles" parent="Exhaust/Exhaust2" index="0"]
+visible = false
+cast_shadow = 0
+amount = 50
+lifetime = 3.0
+visibility_aabb = AABB( nan, 0.05694, -7.38708, 0.867362, 0.904675, 14.7742 )
+process_material = SubResource( 3 )
+draw_pass_1 = SubResource( 4 )
+
+[node name="Exhaust3" type="MeshInstance" parent="Exhaust" index="2"]
+transform = Transform( 1, 0, 0, 0, -4.37114e-08, -1, 0, 1, -4.37114e-08, 0.5, -0.5, 0.1 )
+mesh = SubResource( 9 )
+skeleton = NodePath("../Exhaust2")
+
+[node name="Particles" type="Particles" parent="Exhaust/Exhaust3" index="0"]
+transform = Transform( 1, 0, 0, 0, -1, 8.74228e-08, 0, -8.74228e-08, -1, 0, 0, 0 )
+visible = false
+cast_shadow = 0
+amount = 50
+lifetime = 3.0
+visibility_aabb = AABB( nan, 0.05694, -7.38708, 0.867362, 0.904675, 14.7742 )
+process_material = SubResource( 3 )
+draw_pass_1 = SubResource( 4 )
+
+[node name="Exhaust4" type="MeshInstance" parent="Exhaust" index="3"]
+transform = Transform( 1, 0, 0, 0, -4.37114e-08, -1, 0, 1, -4.37114e-08, -0.5, -0.5, 0.1 )
+mesh = SubResource( 9 )
+skeleton = NodePath(".")
+
+[node name="Particles" type="Particles" parent="Exhaust/Exhaust4" index="0"]
+transform = Transform( 1, 0, 0, 0, -1, 8.74228e-08, 0, -8.74228e-08, -1, 0, 0, 0 )
+visible = false
+cast_shadow = 0
+amount = 50
+lifetime = 3.0
+visibility_aabb = AABB( nan, 0.05694, -7.38708, 0.867362, 0.904675, 14.7742 )
+process_material = SubResource( 3 )
+draw_pass_1 = SubResource( 4 )

scenes/entities/missiles/missile_exhaust.gdshader

@@ -0,0 +1,20 @@
+shader_type spatial;
+
+uniform float ANIM_SPEED = 100.0;
+uniform vec4 hot_color: hint_color = vec4(.9, .9, 9., .5);
+uniform vec4 cold_color: hint_color = vec4(1., 1., 1., 0.);
+
+uniform float power = 1.;
+
+void vertex() {
+	float distance = sqrt(pow(VERTEX.z, 2) + pow(VERTEX.x, 2));
+	VERTEX.y = min(sin(VERTEX.x * TIME * ANIM_SPEED) * power / (distance * 10. + 1.), 0.);
+	
+	vec4 exhaust_color = mix(hot_color, cold_color, VERTEX.y / 5.8);
+	COLOR = exhaust_color;
+}
+
+void fragment() {
+	ALPHA = COLOR.a;
+	ALBEDO = COLOR.rgb;
+}

scenes/entities/railgun.gd

@@ -10,12 +10,11 @@ onready var turret_yaw_bone = skeleton.find_bone("turret head")
 onready var turret_pitch_bone = skeleton.find_bone("vertical joint")
 onready var vert_eyes = $VertEyes
 onready var turret_eyes = $Armature/Skeleton/turretAttachement/TurretEyes
+onready var vision_shape = $Armature/Skeleton/turretAttachement/TurretVision
 
 var first_call: bool = true
 var target: Position3D
 
-#var additional_rotation = Vector3(90, 0, 0)
-
 func _set_lookAtTarget_path(new_value):
 	# Because get_node doesn't work in the first call, we just want to assign instead.
 	# This is to get around a issue with NodePaths exposed to the editor.
@@ -41,8 +40,11 @@ func _set_lookAtTarget_path(new_value):
 	else:
 		print("Railgun.gd: Got no LookAtTarget: ", LookAtTarget)
 
+func get_seen_entities() -> Array:
+	return vision_shape.seen_nodes
+
 func _ready():
-	pass  # configuring skeletonIK
+	pass
 
 
 func _process(delta):

scenes/entities/railgun.tscn

@@ -1,7 +1,8 @@
-[gd_scene load_steps=7 format=2]
+[gd_scene load_steps=9 format=2]
 
 [ext_resource path="res://assets/entities/railgun/railgun.glb" type="PackedScene" id=1]
 [ext_resource path="res://scenes/entities/railgun.gd" type="Script" id=2]
+[ext_resource path="res://scenes/entities/TurretVision.gd" type="Script" id=3]
 
 [sub_resource type="PrismMesh" id=2]
 
@@ -13,6 +14,9 @@ albedo_color = Color( 0.956863, 0.635294, 0.635294, 1 )
 [sub_resource type="SphereMesh" id=8]
 material = SubResource( 7 )
 
+[sub_resource type="ConvexPolygonShape" id=9]
+points = PoolVector3Array( 0, 0, 0, 1000, 1000, -2000, -1000, -1000, -2000, 1000, -1000, -2000, -1000, 1000, -2000 )
+
 [node name="railgun" instance=ExtResource( 1 )]
 script = ExtResource( 2 )
 
@@ -41,6 +45,21 @@ transform = Transform( 0.1, -1.50996e-08, -8.74228e-08, -1.50996e-08, -0.1, -4.3
 transform = Transform( 1, -8.5412e-22, -1.73472e-18, -2.71051e-20, -4.37114e-09, 70, 7.10543e-15, -0.1, -3.0598e-06, 1.3415e-11, 69.095, 0 )
 mesh = SubResource( 8 )
 
+[node name="Camera" type="Camera" parent="Armature/Skeleton/turretAttachement" index="1"]
+transform = Transform( 1, -4.06819e-08, 2.32835e-07, -2.35538e-08, 0.963022, 0.269424, -2.35186e-07, -0.269424, 0.963022, 1.09829e-06, 4.65912, 7.27367 )
+
+[node name="MeshInstance" type="MeshInstance" parent="Armature/Skeleton/turretAttachement/Camera" index="0"]
+visible = false
+mesh = SubResource( 2 )
+skin = SubResource( 3 )
+
+[node name="TurretVision" type="Area" parent="Armature/Skeleton/turretAttachement" index="2"]
+script = ExtResource( 3 )
+
+[node name="CollisionShape" type="CollisionShape" parent="Armature/Skeleton/turretAttachement/TurretVision" index="0"]
+transform = Transform( 1, 0, 0, 0, 1, 0, 0, 0, 1, 6.23837e-08, 1.04241, 0.413149 )
+shape = SubResource( 9 )
+
 [node name="AnimationPlayer" type="AnimationPlayer" parent="." index="1"]
 
 [node name="VertEyes" type="Spatial" parent="." index="2"]
@@ -50,5 +69,6 @@ __meta__ = {
 }
 
 [node name="MeshInstance" type="MeshInstance" parent="VertEyes" index="0"]
+visible = false
 mesh = SubResource( 2 )
 skin = SubResource( 3 )

scenes/entities/railgun_projectile.tscn

@@ -0,0 +1,23 @@
+[gd_scene load_steps=3 format=2]
+
+[sub_resource type="SphereMesh" id=1]
+radius = 0.2
+height = 0.2
+radial_segments = 32
+rings = 16
+
+[sub_resource type="CapsuleShape" id=2]
+radius = 0.13991
+height = 0.16003
+
+[node name="Projectile" type="Spatial"]
+
+[node name="MeshInstance" type="MeshInstance" parent="."]
+transform = Transform( 1, 0, 0, 0, 1, 0, 0, 0, 0.5, 0, 0, 0 )
+mesh = SubResource( 1 )
+
+[node name="RigidBody" type="RigidBody" parent="."]
+
+[node name="CollisionShape" type="CollisionShape" parent="RigidBody"]
+transform = Transform( -4.37114e-08, 0, 1, 0, 1, 0, -1, 0, -4.37114e-08, 0, 0, 0 )
+shape = SubResource( 2 )

scenes/entities/railgun_projectile_ShapeShader.tres

@@ -0,0 +1,16 @@
+[gd_resource type="ShaderMaterial" load_steps=2 format=2]
+
+[sub_resource type="Shader" id=2]
+code = "shader_type spatial;
+
+void vertex() {
+	VERTEX.x += NORMAL.x * sin(40. * VERTEX.x) / 5.;
+}
+
+void fragment() {
+	ALBEDO = vec3(.2, .6, .8);
+	ROUGHNESS = .5;
+}"
+
+[resource]
+shader = SubResource( 2 )

scenes/space.tscn

@@ -1,8 +1,9 @@
-[gd_scene load_steps=7 format=2]
+[gd_scene load_steps=8 format=2]
 
 [ext_resource path="res://assets/environment/skyboxes/nebula_space/panorama_image.png" type="Texture" id=1]
 [ext_resource path="res://scenes/entities/railgun.tscn" type="PackedScene" id=2]
 [ext_resource path="res://scenes/entities/DebugLookAtTarget.gd" type="Script" id=3]
+[ext_resource path="res://scenes/entities/missile.tscn" type="PackedScene" id=4]
 
 [sub_resource type="PanoramaSky" id=1]
 panorama = ExtResource( 1 )
@@ -25,12 +26,15 @@ transform = Transform( 1, 0, 0, 0, 1, 0, 0, 0, 1, 7.50682, 0, -7.59585 )
 LookAtTarget = NodePath("LookAtTarget2")
 
 [node name="LookAtTarget2" type="Position3D" parent="entities/railgun"]
-transform = Transform( 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 8.694, 4.553 )
+transform = Transform( 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 8.694, 29.5299 )
 script = ExtResource( 3 )
 
 [node name="MeshInstance" type="MeshInstance" parent="entities/railgun/LookAtTarget2"]
 mesh = SubResource( 3 )
 
+[node name="missile" parent="entities" instance=ExtResource( 4 )]
+transform = Transform( -0.446495, 0, -0.894786, 0, 1, 0, 0.894786, 0, -0.446495, -7.21845, 8.26498, -24.0157 )
+
 [node name="lighting" type="Node" parent="."]
 
 [node name="main_light" type="DirectionalLight" parent="lighting"]
@@ -43,4 +47,5 @@ light_color = Color( 0.411765, 0.854902, 0.92549, 1 )
 light_energy = 0.2
 
 [node name="Camera" type="Camera" parent="."]
-transform = Transform( 0.8208, 0.16956, -0.545469, 0, 0.954927, 0.296842, 0.571215, -0.243648, 0.783804, -4.41776, 10.7973, 11.901 )
+transform = Transform( -0.916363, 0.11884, -0.382304, 0, 0.954927, 0.296842, 0.400349, 0.272015, -0.875059, -4.41776, 10.7973, -27.9208 )
+current = true