feat: basic beginnings of asteroid game demo

.gitignore

@@ -1,3 +1,5 @@
 .cache
 build
 imgui.ini
+
+live.jenscene

asteroids_test/resources

@@ -0,0 +1 @@
+../resources

asteroids_test/run.sh

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+#!/usr/bin/env bash
+../build/jenjin/jenjin --runtime

asteroids_test/scripts/asteroids.lua

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+local asteroids = {}
+
+function READY() end
+
+function UPDATE()
+	if input.IsKeyDown("r") then
+		local quad = helpers.CreateQuad()
+		local name = tostring("asteroid_"..#asteroids)
+		local obj = GameObject.new(name, quad)
+		obj:SetPosition(vec2.new(math.random(-20, 20), math.random(-10, 10)))
+		obj:SetRotation(math.random(0, 360))
+
+		local r = math.random() / 5
+		obj:SetColor(vec3.new(r, r, r))
+
+		scene:AddGameObject(obj)
+		scene:Build()
+
+		asteroids[#asteroids+1] = obj
+	end
+end

asteroids_test/scripts/gun.lua

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+local bullets = {}
+local player = nil
+
+local bulletCount = 0
+
+local fromLeftGun = true
+local timeSinceLastShot = 11
+
+function READY()
+	player = scene:GetGameObject("Player")
+end
+
+function UPDATE()
+	if input.IsKeyDown("q") then
+		timeSinceLastShot = timeSinceLastShot + 1
+		if timeSinceLastShot > 1 then
+			timeSinceLastShot = 0
+			local obj = GameObject.new("bullet"..bulletCount, helpers.CreateQuad())
+			bulletCount = bulletCount + 1
+
+			fromLeftGun = not fromLeftGun
+
+			local left = vec2.new(math.sin(math.rad(player:GetRotation() - 90)), math.cos(math.rad(player:GetRotation() - 90)))
+			local up = vec2.new(math.sin(math.rad(player:GetRotation())), math.cos(math.rad(player:GetRotation())))
+
+			if fromLeftGun then
+				obj:SetPosition(player:GetPosition() + left * 1.1 + up * 1.2)
+			else
+				obj:SetPosition(player:GetPosition() - left * 1.1 + up * 1.2)
+			end
+
+			obj:SetScale(vec2.new(0.1, 0.2))
+			obj:SetRotation(player:GetRotation())
+			obj:SetColor(vec3.new(1, 0, 0))
+
+			scene:AddGameObject(obj)
+			scene:Build()
+
+			table.insert(bullets, obj)
+
+			player:Translate(up * -0.025)
+		end
+	end
+
+	for i, bullet in ipairs(bullets) do
+		local radians = math.rad(bullet:GetRotation())
+		local direction = vec2.new(math.sin(radians), math.cos(radians))
+		bullet:Translate(direction * 0.5)
+
+		if bullet:GetPosition():Distance(player:GetPosition()) > 250 then
+			scene:RemoveGameObject(bullet)
+			table.remove(bullets, i)
+		end
+	end
+end

asteroids_test/scripts/movement.lua

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+local player = nil
+
+local rotation_speed = 5
+local movement_speed = 0.2
+local acceleration = 0.02
+local deceleration = 0.97
+
+local direction = { x = 0, y = 0 }
+local velocity = 0
+
+function READY()
+	player = scene:GetGameObject("Player")
+end
+
+function UPDATE()
+	handleRotation()
+	handleMovement()
+
+	player:Translate(vec2.new(direction.x, direction.y) * movement_speed * velocity)
+end
+
+function handleRotation()
+	a = input.IsKeyDown("a")
+	d = input.IsKeyDown("d")
+
+	if a or d then
+		local rot = player:GetRotation()
+
+		if a then
+			player:SetRotation((rot - rotation_speed) % 360)
+		else
+			player:SetRotation((rot + rotation_speed) % 360)
+		end
+	end
+end
+
+function handleMovement()
+	if input.IsKeyDown("w") then
+		local radians = math.rad(player:GetRotation())
+		direction.y = math.cos(radians)
+		direction.x = math.sin(radians)
+
+		if velocity < 1 then
+			velocity = velocity + acceleration
+		end
+	else
+		velocity = velocity * deceleration
+	end
+end