thermokarst/raycaster-demo
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remove sizing and adding lateral movement

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This commit is contained in:
Matthew Ryan Dillon 2025-04-22 20:38:45 -04:00
parent 7116fcf1ed
commit 0c553b0739
1 changed files with 16 additions and 20 deletions
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36
main.lua
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@ -5,6 +5,12 @@ local function clamp(value, min, max)
return math.max(math.min(value, max), min)
end
local function clamp_angle(value)
if value < 0 then value = value + 360 end
if value > 360 then value = value - 360 end
return value
end
local function make_player(x, y, width, height, screen)
local crankPosition = playdate.getCrankPosition()
local player = { position={ x=x, y=y, theta=crankPosition}, width=width, height=height, screen=screen }
@ -18,19 +24,17 @@ local function make_player(x, y, width, height, screen)
playdate.graphics.drawPolygon(transformedPolygon)
end
player.translate = function(self, y_amount)
local w, h, theta_rad = self.width / 2, self.height / 2, math.rad(self.position.theta)
local new_x = self.position.x + (y_amount * math.cos(theta_rad))
local new_y = self.position.y + (y_amount * math.sin(theta_rad))
player.translate = function(self, offset_theta, amount)
local w, h, theta = self.width / 2, self.height / 2, self.position.theta
local angle_rad = math.rad(clamp_angle(theta + offset_theta))
local new_x = self.position.x + (amount * math.cos(angle_rad))
local new_y = self.position.y + (amount * math.sin(angle_rad))
self.position.x = clamp(new_x, w, self.screen.width - w)
self.position.y = clamp(new_y, h, self.screen.height - h)
end
player.rotate = function(self, degrees)
local new_theta = self.position.theta + degrees
if new_theta < 0 then new_theta = new_theta + 360 end
if new_theta > 360 then new_theta = new_theta - 360 end
self.position.theta = new_theta
self.position.theta = clamp_angle(self.position.theta + degrees)
end
player.handle_crank = function(self)
@ -38,14 +42,6 @@ local function make_player(x, y, width, height, screen)
self:rotate(change)
end
player.size = function(self, amount)
self.width = clamp(self.width + amount, 2, 80)
self.height = clamp(self.height + amount, 2, 80)
local w, h = self.width / 2, self.height / 2
self.position.x = clamp(self.position.x, w, self.screen.width - w)
self.position.y = clamp(self.position.y, h, self.screen.height - h)
end
return player
end
@ -56,11 +52,11 @@ function playdate.update()
playdate.graphics.clear()
if playdate.isCrankDocked() then playdate.ui.crankIndicator:draw() end
if playdate.buttonIsPressed(playdate.kButtonUp) then player:translate(10) end
if playdate.buttonIsPressed(playdate.kButtonDown) then player:translate(-10) end
if playdate.buttonIsPressed(playdate.kButtonUp) then player:translate(0, 10) end
if playdate.buttonIsPressed(playdate.kButtonDown) then player:translate(180, 10) end
if playdate.buttonIsPressed(playdate.kButtonLeft) then player:size(2) end
if playdate.buttonIsPressed(playdate.kButtonRight) then player:size(-2) end
if playdate.buttonIsPressed(playdate.kButtonLeft) then player:translate(270, 1) end
if playdate.buttonIsPressed(playdate.kButtonRight) then player:translate(90, 1) end
player:handle_crank()
player:draw()