HI, I’m new to Defold and I did the tutoriall however my character falls through the ground and I don’t know why. Here is my hero.script
– gravity pulling the player down in pixel units/sˆ2
local gravity = -20
-- take-off speed when jumping in pixel units/s
local jump_takeoff_speed = 900
function init(self)
-- this tells the engine to send input to on_input() in this script
msg.post(".", "acquire_input_focus")
-- save the starting position
self.position = go.get_position()
-- keep track of movement vector and if there is ground contact
self.velocity = vmath.vector3(0, 0, 0)
self.ground_contact = false
end
function final(self)
-- Return input focus when the object is deleted
msg.post(".", "release_input_focus")
end
local function play_animation(self, anim)
-- only play animations which are not already playing
if self.anim ~= anim then
-- tell the spine model to play the animation
spine.play("#spinemodel", anim, go.PLAYBACK_LOOP_FORWARD, 0.15)
-- remember which animation is playing
self.anim = anim
end
end
local function update_animation(self)
-- make sure the right animation is playing
if self.ground_contact then
play_animation(self, hash("run_right"))
else
if self.velocity.y > 0 then
play_animation(self, hash("jump_right"))
else
play_animation(self, hash("fall_right"))
end
end
end
function update(self, dt)
local gravity = vmath.vector3(0, gravity, 0)
if not self.ground_contact then
-- Apply gravity if there's no ground contact
self.velocity = self.velocity + gravity
end
-- apply velocity to the player character
go.set_position(go.get_position() + self.velocity * dt)
update_animation(self)
-- reset volatile state
self.correction = vmath.vector3()
self.ground_contact = false
end
local function handle_geometry_contact(self, normal, distance)
-- project the correction vector onto the contact normal
-- (the correction vector is the 0-vector for the first contact point)
local proj = vmath.dot(self.correction, normal)
-- calculate the compensation we need to make for this contact point
local comp = (distance - proj) * normal
-- add it to the correction vector
self.correction = self.correction + comp
-- apply the compensation to the player character
go.set_position(go.get_position() + comp)
-- check if the normal points enough up to consider the player standing on the ground
-- (0.7 is roughly equal to 45 degrees deviation from pure vertical direction)
if normal.y > 0.7 then
self.ground_contact = true
end
-- project the velocity onto the normal
proj = vmath.dot(self.velocity, normal)
-- if the projection is negative, it means that some of the velocity points towards the contact point
if proj < 0 then
-- remove that component in that case
self.velocity = self.velocity - proj * normal
end
end
function on_message(self, message_id, message, sender)
if message_id == hash("contact_point_response") then
-- check if we received a contact point message. One message for each contact point
if message.group == hash("geometry") then
handle_geometry_contact(self, message.normal, message.distance)
end
end
end
local function jump(self)
-- only allow jump from ground
if self.ground_contact then
-- set take-off speed
self.velocity.y = jump_takeoff_speed
end
end
local function abort_jump(self)
-- cut the jump short if we are still going up
if self.velocity.y > 0 then
-- scale down the upwards speed
self.velocity.y = self.velocity.y * 0.5
end
end
function on_input(self, action_id, action)
if action_id == hash("jump") or action_id == hash("touch") then
if action.pressed then
jump(self)
elseif action.released then
abort_jump(self)
end
end
end
I have the mask propert set to geometry for the chacter and for the ground I have it set to hero,
