Add support for multiple planets

PlanetMaterial.tres

@@ -0,0 +1,57 @@
+[gd_resource type="ShaderMaterial" load_steps=2 format=2]
+
+[sub_resource type="Shader" id=2]
+code = "shader_type spatial;
+
+
+uniform vec2 scale = vec2(50.0);
+uniform bool seamless = false;
+
+uniform vec3 color_scale;
+
+float rand(vec2 coord) {
+	return fract(sin(dot(coord, vec2(12.9898, 78.233))) * 43758.5453);
+}
+
+float perlin_noise(vec2 coord) {
+	vec2 i = floor(coord);
+	vec2 f = fract(coord);
+	
+	float t_l = rand(i) * 6.283;
+	float t_r = rand(i + vec2(1, 0)) * 6.283;
+	float b_l = rand(i + vec2(0, 1)) * 6.283;
+	float b_r = rand(i + vec2(1)) * 6.283;
+	
+	vec2 t_l_vec = vec2(-sin(t_l), cos(t_l));
+	vec2 t_r_vec = vec2(-sin(t_r), cos(t_r));
+	vec2 b_l_vec = vec2(-sin(b_l), cos(b_l));
+	vec2 b_r_vec = vec2(-sin(b_r), cos(b_r));
+	
+	float t_l_dot = dot(t_l_vec, f);
+	float t_r_dot = dot(t_r_vec, f - vec2(1, 0));
+	float b_l_dot = dot(b_l_vec, f - vec2(0, 1));
+	float b_r_dot = dot(b_r_vec, f - vec2(1));
+	
+	vec2 cubic = f * f * (3.0 - 2.0 * f);
+	
+	float top_mix = mix(t_l_dot, t_r_dot, cubic.x);
+	float bot_mix = mix(b_l_dot, b_r_dot, cubic.x);
+	float whole_mix = mix(top_mix, bot_mix, cubic.y);
+	
+	return whole_mix + 0.5;
+}
+
+void fragment() {
+	vec2 coord = UV * scale;
+	
+	float value = perlin_noise(coord);
+	
+	ALBEDO = vec3(value * color_scale);
+}"
+
+[resource]
+resource_local_to_scene = true
+shader = SubResource( 2 )
+shader_param/scale = Vector2( 50, 50 )
+shader_param/seamless = false
+shader_param/color_scale = Vector3( 0.8, 0.2, 0.4 )

Planets.gd

@@ -10,18 +10,22 @@ const distance_multiplier = 318550   # thus, a radius of 20 results in an earth-
 
 # If the gravity doesn't feel like it should, this scales it. A higher value means that the pull is
 # stronger.
-const gravity_multiplier = 2.5
+const gravity_multiplier = 5.0
 
 
 func get_gravitation_acceleration(position: Vector3) -> Vector3:
-	# TODO: Take all planets and their mass into account
-	var pos_to_center = ($Earth.transform.origin - position)
+	var total_force = Vector3.ZERO
+	
+	for planet in get_children():
+		var pos_to_center = (planet.transform.origin - position)
 		var distance = pos_to_center.length()
 		
-	var force = _gravity($Earth.mass * mass_multiplier, distance * distance_multiplier)
+		var force = _gravity(planet.mass * mass_multiplier, distance * distance_multiplier)
 		force *= gravity_multiplier
 		
-	return (pos_to_center / distance) * force
+		total_force += (pos_to_center / distance) * force
+	
+	return total_force
 
 
 # Formula for gravity

Player.gd

@@ -1,19 +1,39 @@
 extends KinematicBody
 
 
+const MAX_VEL = 500.0
+
 var acceleration := Vector3(0.0, -9.81, 0.0)
 var velocity := Vector3(0.0, 0.0, 0.0)
 
-var move_speed = 15.0
-var jump_accel = 600.0
+var move_accel = 60.0
 var rotate_speed = 2.0
+var drag = 0.05
+
+# Jumping
+var jumping := false
+var on_ground := false
+var time_since_jump_start := 0.0
+
+var initial_jump_burst = 10.0
+var jump_exponent = 0.05
 
 export(NodePath) var solar_system
 
 
-# Called when the node enters the scene tree for the first time.
-func _ready():
-	pass # Replace with function body.
+func _input(event):
+	if event.is_action_pressed("jump") and on_ground:
+		on_ground = false
+		jumping = true
+		time_since_jump_start = 0.0
+	elif event.is_action_released("jump"):
+		jumping = false
+
+
+func apply_acceleration(acceleration):
+	# First drag, then add the new acceleration
+	velocity *= 1 - drag
+	velocity += acceleration
 
 
 # Called every frame. 'delta' is the elapsed time since the previous frame.
@@ -22,34 +42,41 @@ func _physics_process(delta):
 	var move_acceleration := Vector3.ZERO
 	
 	# Movement and rotation
-	if Input.is_action_pressed("ui_up"):
-		move_velocity.z -= move_speed
-	if Input.is_action_pressed("ui_down"):
-		move_velocity.z += move_speed
-	if Input.is_action_pressed("ui_left"):
+	if Input.is_action_pressed("move_up"):
+		move_acceleration.z -= move_accel
+	if Input.is_action_pressed("move_down"):
+		move_acceleration.z += move_accel
+	if Input.is_action_pressed("move_left"):
 		rotate(transform.basis.y, delta * rotate_speed)
-	if Input.is_action_pressed("ui_right"):
+	if Input.is_action_pressed("move_right"):
 		rotate(transform.basis.y, -delta * rotate_speed)
 	
 	# Make movement local
-	move_velocity = transform.basis * move_velocity
+	move_acceleration = transform.basis * move_acceleration
 	
 	# Jumping and Gravity
 	var gravity_acceleration = get_node(solar_system).get_gravitation_acceleration(transform.origin)
 	
-	if Input.is_action_just_pressed("ui_select"):
-		move_acceleration += gravity_acceleration.normalized() * jump_accel
+	apply_acceleration((move_acceleration + gravity_acceleration) * delta)
 	
-	# Gravity
-	velocity += (gravity_acceleration - move_acceleration) * delta
-	var movement = (move_velocity + velocity) * delta
+	# Handle jumping
+	if jumping:
+		var e_section = max(exp(log(initial_jump_burst - 1 / jump_exponent * time_since_jump_start)), 0.0000001)
+		velocity += -gravity_acceleration.normalized() * e_section
+		time_since_jump_start += delta
 	
 	# Apply movement to position
-	var collision = move_and_collide(movement)
+	# FIXME: move_and_slide might make more sense, but couldn't quite get that to work...
+	#move_and_slide(velocity, -gravity_acceleration.normalized(), true)
+	var collision = move_and_collide(velocity * delta)
 	
-	# Reset the velocity if the body is colliding
-	if collision:
-		velocity = Vector3.ZERO
+	if collision and not jumping:
+		on_ground = true
+	
+	# Clamp the velocity just to be save
+	velocity.x = clamp(velocity.x, -MAX_VEL, MAX_VEL)
+	velocity.y = clamp(velocity.y, -MAX_VEL, MAX_VEL)
+	velocity.z = clamp(velocity.z, -MAX_VEL, MAX_VEL)
 	
 	# Rotate down vector to face center of gravity
 	var down = gravity_acceleration
@@ -57,5 +84,7 @@ func _physics_process(delta):
 	var angle = local_down.angle_to(down)
 	var axis = local_down.cross(down).normalized()
 	
+	print(velocity.y)
+	
 	if axis != Vector3.ZERO: # Happens if we're perfectly aligned already (local_down and down are equal)
 		rotate(axis, angle)

project.godot

@@ -50,6 +50,31 @@ ui_down={
 , Object(InputEventJoypadButton,"resource_local_to_scene":false,"resource_name":"","device":0,"button_index":13,"pressure":0.0,"pressed":false,"script":null)
  ]
 }
+move_up={
+"deadzone": 0.5,
+"events": [ Object(InputEventKey,"resource_local_to_scene":false,"resource_name":"","device":0,"alt":false,"shift":false,"control":false,"meta":false,"command":false,"pressed":false,"scancode":87,"unicode":0,"echo":false,"script":null)
+ ]
+}
+move_down={
+"deadzone": 0.5,
+"events": [ Object(InputEventKey,"resource_local_to_scene":false,"resource_name":"","device":0,"alt":false,"shift":false,"control":false,"meta":false,"command":false,"pressed":false,"scancode":83,"unicode":0,"echo":false,"script":null)
+ ]
+}
+move_left={
+"deadzone": 0.5,
+"events": [ Object(InputEventKey,"resource_local_to_scene":false,"resource_name":"","device":0,"alt":false,"shift":false,"control":false,"meta":false,"command":false,"pressed":false,"scancode":65,"unicode":0,"echo":false,"script":null)
+ ]
+}
+move_right={
+"deadzone": 0.5,
+"events": [ Object(InputEventKey,"resource_local_to_scene":false,"resource_name":"","device":0,"alt":false,"shift":false,"control":false,"meta":false,"command":false,"pressed":false,"scancode":68,"unicode":0,"echo":false,"script":null)
+ ]
+}
+jump={
+"deadzone": 0.5,
+"events": [ Object(InputEventKey,"resource_local_to_scene":false,"resource_name":"","device":0,"alt":false,"shift":false,"control":false,"meta":false,"command":false,"pressed":false,"scancode":32,"unicode":0,"echo":false,"script":null)
+ ]
+}
 
 [rendering]