Smoother missile tail fade
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@ -7,7 +7,9 @@ local wall_thickness = 0.01
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local missiles = {}
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local missile_radius = 0.005
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local missile_trail_length = 15
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local missile_trail_fade = 0.4
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local missile_trail_min_visibility = 0.03
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local missile_trail_length = math.log(missile_trail_min_visibility, missile_trail_fade)
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local cities = {}
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local city_radius = 0.05
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@ -102,6 +104,7 @@ function spawnMissile(x, y, target_x, target_y, speed)
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history = {
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{x = x, y = y}
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},
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trail_length = 0,
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alive = true
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})
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end
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@ -130,25 +133,20 @@ function updateMissiles(dt)
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missile.x = missile.x + missile.dx * dt
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missile.y = missile.y + missile.dy * dt
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local collided = false
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if missile.y < wall_thickness + missile_radius then
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-- Collision with top wall
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missile.y = wall_thickness + missile_radius
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missile.dy = -missile.dy
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collided = true
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end
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if missile.x < wall_thickness + missile_radius then
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-- Collision with left wall
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missile.x = wall_thickness + missile_radius
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missile.dx = -missile.dx
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collided = true
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elseif missile.x > 1 - (wall_thickness + missile_radius) then
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-- Collision with right wall
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missile.x = 1 - (wall_thickness + missile_radius)
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missile.dx = -missile.dx
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collided = true
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end
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local paddle_left = paddle_x - paddle_width/2
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@ -159,7 +157,6 @@ function updateMissiles(dt)
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missile.y = paddle_top
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missile.dy = -missile.dy
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missile.reflected = true
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collided = true
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end
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for _, city in ipairs(cities) do
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@ -188,16 +185,23 @@ function updateMissiles(dt)
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end
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end
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if collided then
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local dx = missile.history[1].x - missile.x
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local dy = missile.history[1].y - missile.y
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local distance = math.sqrt(dx * dx + dy * dy)
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missile.history[1].length = distance
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missile.trail_length = missile.trail_length + distance
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table.insert(missile.history, 1, {
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x = missile.x,
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y = missile.y
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y = missile.y,
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length = nil,
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})
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-- Remove the oldest segments
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if #missile.history > missile_trail_length then
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while missile.trail_length > missile_trail_length do
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local length = missile.history[#missile.history].length
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missile.trail_length = missile.trail_length - length
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table.remove(missile.history)
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end
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end
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print(#missile.history)
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end
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local i = 1
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@ -335,16 +339,23 @@ function drawMissiles()
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-- Trails
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for _, missile in ipairs(missiles) do
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local dx = missile.history[1].x - missile.x
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local dy = missile.history[1].y - missile.y
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local length = math.sqrt(dx * dx + dy * dy)
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local from_x, from_y = toScreenCoordinates(missile.x, missile.y)
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local visibility = 1
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for _, point in ipairs(missile.history) do
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local visibility = missile_trail_fade ^ length
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if point.length ~= nil then
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length = length + point.length
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end
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local x, y = toScreenCoordinates(point.x, point.y)
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if missile.reflected then
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love.graphics.setColor(1 * visibility, 1 * visibility, 0.5 * visibility)
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else
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love.graphics.setColor(1 * visibility, 0.4 * visibility, 0 * visibility)
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end
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visibility = visibility * 0.8
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love.graphics.line(from_x, from_y, x, y)
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from_x = x
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from_y = y
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